When I was setting spring height back in the day, I used a telescoping gauge and an OD mic. Things have come a long way in the past 40 years. Love your channel!
Thanks for some real information. The internet is full of people that speak like they know everything. Even know they probably never even set up a set of heads they speak what they been told or heard like it’s facts. Really appreciate the time you give to actually give your honest opinions and real life experience. The world needs more people like you. Thanks again can’t wait for more!
Great video. I run big valve Ford Cleveland engines and really have to watch the valvetrain weights and spring pressures because I like to rev these big valves. Your videos are amongst the best out there.
Hello Daniel, I finally got a little time to watch your valve spring stuff episode. All I got to say is WOW. I understand the installed spring height and how it can affect the geometry of the valve train especially with non adjustable applications and such but you explained so so much more of what is going on with all that. I'm always learning something new or understanding things better with every one of your videos. Hell let's call it what it is, these are not videos these are priceless tech classes. Keep them coming Daniel, you're teaching so many people and I sure hope they all appreciate it as much as I do. ❤
@@PowellCams I've often wondered why they sell you or let you pick your pushrod length when that's one of the last things you know putting an engine together. Probably is the last thing
100% accurate. My .600 lift cam kit came with dual springs. It specced 160# seat, but I thought the dual springs were a bit excessive, but it came in cheaper than a nice pac spring plus the bare cam. Mine took .080 shims on average to get to 1.800", but I do have slightly longer valves. On a higher budget project, I'd definitely go Pac or PSI.
a real good informative tutorial on valve springs. I was shocked to see the valve springs quiver in the video clip. for sure determining the right beehive set for the cam is the smart thing to do and the added cost is minimal. thank you for posting.
I love this series of videos. When I first bought my GTO 6.0 in 2006 there was so much bullshit out there about springs, valve train set up... "Oh you'll be good to go with the .660" spring."
Enjoyed the video - lots of good information in here. I couldn't agree more than so many of these LS/LT deals are being put together without any measuring what so ever - and that's a major oversite in your more max effort cases. I'm right there with you on valve-train mass , keeping the rocker and intake valve in particular nice and light is critical to achieving valve-train stability without monster spring pressure. I work for one of those "Boutique LS shops" you referred to, but I can tell you the only springs we sell are made here in the USA by BTR, PAC, and PSI. Not everybody out here is trying to run Chinesium junk while picking their customer's pockets clean. Our off the shelf street/strip cams are in that .640-.650 lift range and setup very well on a BTR 660 that comes in around 1.780 installed, and ends up about .060" from bind. Gives about 155lbs on the seat and ~400lbs open, which is what we find is necessary to keep things stable out to 7000-7200 where most of our street/strip stuff with stock heads/rockers is going to get turned. We could make a PAC 1276x beehive work in that application, but it's a tough sell for essentially the same spring performance at double the money. You mentioned a beehive on a .600" lift deal being good with like 130/315 out to 6500rpm - and while I agree that ought to be great, that's a pretty mild cam if it's only gotta see that much RPM to give all it has to offer. We like to lean into the more max-effort side of hydraulic roller naturally aspirated LS/LT stuff and often put together combinations that swing upwards of 7500-8000rpm. The PAC 1209x and PSI 1513ML are our go-to springs for those sort of deals, and are about 160/475 without shims, and depending on the combo we may shim another .050"+ into them. A good, preferably short travel hydraulic roller lifter will stand up to that just fine. You might like our "9k" project that we did a few months back on the Spintron: ua-cam.com/video/PT3QVmTXtC4/v-deo.html&
The btr springs cb is at 1.025, so 1.78-.650=1.130, so that's. 105 from cb not .06, also btr spring's are made offshore, also I fully agree a Pac 1218 isn't a 9k rpm spring, in my example it will work perfectly in 90% of the street applications we grind cams for, it's a small percentage of people trying to turn 8k and actually make power with there cam and header weekend cruiser, but like u said, gotta keep the valvetrain weight down, more seat pressure just equals more opening side deflection and lofting, but I agree we have sum rode race engines with pac beehives making power at 7500, so it works no doubt.
@@PowellCams I have bind on BTR 660s at 1.070, but certainly they won't all test the same. Didn't know they come from offshore, that's disappointing. Totally agree that you're make some noise and go get ice cream setups don't need any of the exotic stuff. Probably a lot of stuff running around is poorly setup, over-sprung, etc. All about the right combo for the application. Keep the vids coming, this is the kinda depth of content is rarely discussed!
@andrewcammer2535 absolutely, nobody is sharing this information, it's the same feedback I get on our "Powell machine Inc" channel, we show people why,where and how on machining engines ect, and my channel is relatively new, and it's done surprisingly well, for a backwoods redneck! Lol, ty for watching, more to come, (we are going to build a spintron from scratch later this year, we ate going to document the build.)
Daniel...that was the best slo mo footage of valve spring dance...i have ever seen...!..what i cant beleve was how MUCH the valve was move'n side to side...in the guide & on the seat...!...that is defenatly N.G....!...GREAT video...."people that dont know the differance between a ball pean hammer & tennis shoe laces"...omg...lmao...lmao...great job explan'n install hight & how 2 figure what u need to do as far as shims..or dont need 2 do....well done..!..thanks...
Exact situation happened to me on my first "performance" engine. Reached out to the most reputable shop in the forums. Sold me a double spring kit and 7.40 pushrods for a mild torque cam. Noisy valvetrain on new engine. Put high dollar linkbar lifters in, same noise. Switched to PAC 1219 and noise gone.
My favorite valvespring story is Uncle Tony collapsing a set of brand new comp retrofit rollers for a mopar LA. He was running this thousand dollar cam kit with a set of 340 six pack springs. He also claims he doesnt prefill his lifters. I figure what happened is the coils cleared coil bind, just, when the lifters were empty but as soon as they had any pressure the springs went solid and wiped out the lifters and cam. Knowing that guy it was probably a set of valvesprings that had sat in a box on his shelf for a decade after they came out of a different engine. Seriously, it didnt survive the break in. Everything was toasted. For a $100 set of springs.
Back yard bob here, my Spring install calls for 1.800 at 100lb But that would put it at .100 before bind. Mild cam 552, and bee hives. I don't have a way to Measure force . I think ot would only add 3lb closed if I shoot for 90 to bind, But math is not my strong point. I wonder how close I can get to .050 before bind without to much spring force ( ruffly)
@PowellCams Thank you. If I don't have an Idea of what my Seat pressure should be with my set up. It's like Handing someone the wrong side of the tape measure. When I get to the other end it just says one. I guess I can call manufacturer.I was just trying to find out what you say.
My first high perf car I would break rocker arms and bed pushrods quite often. And then the roller cam and the roller rockers came about. Many years ago I'm old man .
@@PowellCams got a used set of heads springs looks new guy couldn't remember what brand they used didn't know if different companies made them different probley would be best to replace them Thanks
@@ericwright5419 ,,,,,,,,,,,,,,,,,,,,,,check the spring pressure at the installed height you may need to run,,,,,,,,,,,measure the height of the spring , and diameter,,,,,,confirm with a cam grinder if your springs will work with a given cam,,,,,,,,
Learn something new every day! I allay thought the purpose of a beehive spring was to provide extra clearance for higher than stock ratio aftermarket rocker arms
I remember back in the mid years 2000 people were breaking Comp behive 918 springs and Manley single coil springs. So dual springs were sold to help guard against dropped valve.
That happened when Comp stopped buying springs from PAC, and started sourcing springs from a company outside of the United States. Comp kept the same part numbers. The fix was going back to a good spring like a PAC. But Comp never did.
LS Botique shop, LMAO! I`m gonna remember that........I was waiting for ya to go to the cone shaped spring, I want to try them but i`m collecting information on them first.I understand that they don`t have a resonace frequency that will be encountered in an automotive application which sounds good to me. However the only application I`ve seen is hydraulic stuff, do they run any solid app stuff with them?.
I was afraid about anything you saw with triple springs & high seat pressure as something has to wear. My 5.3L (24X LS truck) grandpa grocery getter is running stock springs with a motorhome early RPM torque cam. I have not worked on race cars in 35 yrs or been into casino, but I am betting on longevity. Mass in motion has to be light weight or it gets expensive quick! Thanks kindly for this info.
go information. you need to also check your actual rocker arm ratio. i have found that many oem and after market rocker arms ratios do not match specified or advertised ratios this will affect your spring and cam set up.
an engine building channel said that there are some radical cams that have a .002 dip just before the opening ramp. he didn't say why, said call crower. i called and they said dave and bruce used it but they didn't know why. my guess is it makes the opening more radical but was wondering if you might know since you are a cam grinder?
@@PowellCams They must be good. My 2003 5.7 ram went 356k miles on the factory beehive springs before one decided to break. The replacements, still a Mopar beehive but with a damper on the lower part.
Oh yeah and one more thing, I also have the same blue valve spring pressure tester device. I used to use it a lot back years ago😂😂 the one I have is much much more dustier than yours
Ive made new billet cores for tractor cams. Tractors usually run flat tappets but the blanks I made were for rollers. Ive noticed that the lobes are usually shifted off front to back probably to help with making the flat lifter spin. Ive noticed if you put the lobes in the original location when making a roller, the roller will not ride in the center of the lobe. I was wondering when you grind a flat tappet cam do you have to pay attention to which way the lobe taper is. Are they always larger towards the front or the back or is it engine specific.
Some go all same, some half one way half the other, also ft lobes are offset some amount, chevys are .030, so you need to know lifter bore locations to do a roller.
Had a summit house brand pontiac cam recently with the taper ground on the wrong way. Lifters wouldnt spin. Luckily caught it on the run stand. Swapped ot out for a eglin brand cam that had the taper on the right way but taper was only a couple of thou and still not all lifters spun. Got the core reground by a local cam guy and problem solved.
,,,,,,,,,,,,,Thanks big time.....I have been settin spring heights and cutting valve seats for harley twins for decades......I always tought the more clearance to coil bind would be safer.........Spintron info was not around in the 1980',,,,,,,,,,,,we did with springs as to what the cam grinder recommended,,,,,,,,I'm lucky I never got in trouble with jobs,,,,,,,,,,,,,,,,,,,,,,Today ,,, the beehive and ovate conical springs ; make dual and triple springs obsolete.......but , ya use what ya can afford........Harmonics and resonance , are terms of deep science that engine builders were in the dark about,,,,,,,,,,,,,,,,,,the web has spread eons of education , from the manufacturers ,and sema shows, ,,,,engine expo,, podcasts,,,,,,,,,hell I love engineering ...
So years ago i had my ls403 stroker with ported heads give up a valve head and mess up my cylinder. Was pushing 18lbs boost texas speed cam 236/ 242 601/610 114 lsa with the dual springs. Could this have been caused by the springs or maybe the guide? Ive always wondered.
@@PowellCams I honestly don't remember all the specs but I did use top notch everything because it was for a 1000 + build. I can't even remember what valves, Manley I believe. Wrecked my life...10k into building and it ran maybe 100 miles. Pretty disappointed. Still have everything in the garage and thinking about doing it again but... Do you think I should get rid of all those valves in case it was a bad run?
So my guess is if I’m replacing my factory springs that have an installed height of 1.8 with new springs that have an installed height of 1.8 can I just swap them out and be good?
I'd like someone to do something on profile design. (Acceleration curve, deceleration curve, velocity/eccentricity, float cover, surge & vibration avoidance, etc.) Anyone seen this on UA-cam?
Steve Morris broke a valve spring out on the road traveling from race to race. Maybe you saw the video. That is harder on springs than the trailer queens that only drag race. If you’re going at a constant speed that coincides with the destructive harmony of the spring. I’ve always felt that is the secret to free energy I.e. dynamic harmony. The Tacoma Narrows Bridge demonstrates this. Blow gently across the edge of a taut ribbon. The energy exhibited seems more than the energy induced. You are promoting beehives but have you ever dealt with conicals? They seem to have an advantage in coil bind. ua-cam.com/video/XggxeuFDaDU/v-deo.htmlsi=jR4FyqbBPHUqZPG8
@@PowellCams Me neither... It happens with some of the gun channels that I follow, but typically not with the automotive channels... Maybe camshafts are as controversial as firearms and we just didn't realize it... Lol... Great video by the way... Hopefully it is eye opening for a lot of people...
Love what you do, keep bringing that type of info.. And ignore nay sayers !
Thanks, will do!
When I was setting spring height back in the day, I used a telescoping gauge and an OD mic. Things have come a long way in the past 40 years. Love your channel!
Ty, we appreciate that 🙏
I've learned more about automotive theory from you than any other source. Thank you.
Thanks for some real information. The internet is full of people that speak like they know everything. Even know they probably never even set up a set of heads they speak what they been told or heard like it’s facts. Really appreciate the time you give to actually give your honest opinions and real life experience. The world needs more people like you. Thanks again can’t wait for more!
And that's exactly why the internet can be a scary place
Thank you for explaining this. It makes a lot more sense to me now.
Glad to help
Great video. I run big valve Ford Cleveland engines and really have to watch the valvetrain weights and spring pressures because I like to rev these big valves. Your videos are amongst the best out there.
We appreciate that 🙏
Hello Daniel, I finally got a little time to watch your valve spring stuff episode. All I got to say is WOW. I understand the installed spring height and how it can affect the geometry of the valve train especially with non adjustable applications and such but you explained so so much more of what is going on with all that. I'm always learning something new or understanding things better with every one of your videos. Hell let's call it what it is, these are not videos these are priceless tech classes. Keep them coming Daniel, you're teaching so many people and I sure hope they all appreciate it as much as I do. ❤
We really appreciate that 🙏, we are trying to share the stuff we have learned over the last 30 years, hopefully it's helping
Great series - really clarifies valve train set-up & cams. Thank you.
Glad you like them!
Awesome video Sir! Thank you for taking the time to do these.
My pleasure!
Thanks for the video series, I'm pretty knowledgeable about cams engines etc but I still normally take something away from each video
@blueridgemountainprepper2166 glad it's helpful .
😂 LS Boutique Shops .. that's gold!
Lol, what else do we call them? Haha
@@PowellCams I've often wondered why they sell you or let you pick your pushrod length when that's one of the last things you know putting an engine together. Probably is the last thing
@@MichaelScudder72 yep, it's crazy
100% accurate. My .600 lift cam kit came with dual springs. It specced 160# seat, but I thought the dual springs were a bit excessive, but it came in cheaper than a nice pac spring plus the bare cam. Mine took .080 shims on average to get to 1.800", but I do have slightly longer valves. On a higher budget project, I'd definitely go Pac or PSI.
@@chriswise1232 yep, I hear it 10 times a day
a real good informative tutorial on valve springs. I was shocked to see the valve springs quiver in the video clip. for sure determining the right beehive set for the cam is the smart thing to do and the added cost is minimal. thank you for posting.
@siliconvalleyengineer5875 glad you enjoyed!
I love this series of videos. When I first bought my GTO 6.0 in 2006 there was so much bullshit out there about springs, valve train set up... "Oh you'll be good to go with the .660" spring."
That's always the answer, every time..
I make up go -no go gauges for a given installed height. I use a rod , like a welding rod or even coat hanger wire. E Z and simple.
I have a video of how I do it with actual machinist gauge blocks
Enjoying, this channel!
Glad you enjoy it!
Enjoyed the video - lots of good information in here. I couldn't agree more than so many of these LS/LT deals are being put together without any measuring what so ever - and that's a major oversite in your more max effort cases. I'm right there with you on valve-train mass , keeping the rocker and intake valve in particular nice and light is critical to achieving valve-train stability without monster spring pressure.
I work for one of those "Boutique LS shops" you referred to, but I can tell you the only springs we sell are made here in the USA by BTR, PAC, and PSI. Not everybody out here is trying to run Chinesium junk while picking their customer's pockets clean. Our off the shelf street/strip cams are in that .640-.650 lift range and setup very well on a BTR 660 that comes in around 1.780 installed, and ends up about .060" from bind. Gives about 155lbs on the seat and ~400lbs open, which is what we find is necessary to keep things stable out to 7000-7200 where most of our street/strip stuff with stock heads/rockers is going to get turned. We could make a PAC 1276x beehive work in that application, but it's a tough sell for essentially the same spring performance at double the money.
You mentioned a beehive on a .600" lift deal being good with like 130/315 out to 6500rpm - and while I agree that ought to be great, that's a pretty mild cam if it's only gotta see that much RPM to give all it has to offer. We like to lean into the more max-effort side of hydraulic roller naturally aspirated LS/LT stuff and often put together combinations that swing upwards of 7500-8000rpm. The PAC 1209x and PSI 1513ML are our go-to springs for those sort of deals, and are about 160/475 without shims, and depending on the combo we may shim another .050"+ into them. A good, preferably short travel hydraulic roller lifter will stand up to that just fine.
You might like our "9k" project that we did a few months back on the Spintron: ua-cam.com/video/PT3QVmTXtC4/v-deo.html&
The btr springs cb is at 1.025, so 1.78-.650=1.130, so that's. 105 from cb not .06, also btr spring's are made offshore, also I fully agree a Pac 1218 isn't a 9k rpm spring, in my example it will work perfectly in 90% of the street applications we grind cams for, it's a small percentage of people trying to turn 8k and actually make power with there cam and header weekend cruiser, but like u said, gotta keep the valvetrain weight down, more seat pressure just equals more opening side deflection and lofting, but I agree we have sum rode race engines with pac beehives making power at 7500, so it works no doubt.
@@PowellCams I have bind on BTR 660s at 1.070, but certainly they won't all test the same. Didn't know they come from offshore, that's disappointing.
Totally agree that you're make some noise and go get ice cream setups don't need any of the exotic stuff. Probably a lot of stuff running around is poorly setup, over-sprung, etc. All about the right combo for the application.
Keep the vids coming, this is the kinda depth of content is rarely discussed!
@andrewcammer2535 absolutely, nobody is sharing this information, it's the same feedback I get on our "Powell machine Inc" channel, we show people why,where and how on machining engines ect, and my channel is relatively new, and it's done surprisingly well, for a backwoods redneck! Lol, ty for watching, more to come, (we are going to build a spintron from scratch later this year, we ate going to document the build.)
Daniel...that was the best slo mo footage of valve spring dance...i have ever seen...!..what i cant beleve was how MUCH the valve was move'n side to side...in the guide & on the seat...!...that is defenatly N.G....!...GREAT video...."people that dont know the differance between a ball pean hammer & tennis shoe laces"...omg...lmao...lmao...great job explan'n install hight & how 2 figure what u need to do as far as shims..or dont need 2 do....well done..!..thanks...
Glad you enjoyed it!, more coming
Last 25 years that slow motion stuff sure help fix valve train problems.
Exact situation happened to me on my first "performance" engine. Reached out to the most reputable shop in the forums. Sold me a double spring kit and 7.40 pushrods for a mild torque cam. Noisy valvetrain on new engine. Put high dollar linkbar lifters in, same noise. Switched to PAC 1219 and noise gone.
Exactly 💯
My favorite valvespring story is Uncle Tony collapsing a set of brand new comp retrofit rollers for a mopar LA. He was running this thousand dollar cam kit with a set of 340 six pack springs. He also claims he doesnt prefill his lifters. I figure what happened is the coils cleared coil bind, just, when the lifters were empty but as soon as they had any pressure the springs went solid and wiped out the lifters and cam. Knowing that guy it was probably a set of valvesprings that had sat in a box on his shelf for a decade after they came out of a different engine.
Seriously, it didnt survive the break in. Everything was toasted. For a $100 set of springs.
There all kinds of nonsense on the interweb...
oh oh...first comment!lol.love the channel.learning so much.thank you.
Awesome! Thank you!, u are the 🏆 winner
Extremely Educational Dan
Thank you!
Great series Daniel! Keep em coming sir!
Thanks, will do!
Learn something new every day.
Glad it's helping
Damn...this is great info!!
Glad you think so!
great stuff again
@@RussellCompton-fh3gr glad u enjoyed
Thanks for the great info
Any time!
Back yard bob here, my Spring install calls for 1.800 at 100lb But that would put it at .100 before bind. Mild cam 552, and bee hives. I don't have a way to Measure force . I think ot would only add 3lb closed if I shoot for 90 to bind, But math is not my strong point. I wonder how close I can get to .050 before bind without to much spring force ( ruffly)
Gotta measure, !
@PowellCams Thank you. If I don't have an Idea of what my Seat pressure should be with my set up. It's like Handing someone the wrong side of the tape measure. When I get to the other end it just says one. I guess I can call manufacturer.I was just trying to find out what you say.
My first high perf car I would break rocker arms and bed pushrods quite often.
And then the roller cam and the roller rockers came about.
Many years ago I'm old man .
I have seen it!
Thank ya Daniel!
@@aslacker our pleasure
Very good video getting ready to setup valve springs nice to see a video like this to refresh my brain lol
Glad I could help
@@PowellCams Are they any way to tell the brand of a valve spring
@@ericwright5419 I can tell sometimes just because I have seen so many
@@PowellCams got a used set of heads springs looks new guy couldn't remember what brand they used didn't know if different companies made them different probley would be best to replace them Thanks
@@ericwright5419 ,,,,,,,,,,,,,,,,,,,,,,check the spring pressure at the installed height you may need to run,,,,,,,,,,,measure the height of the spring , and diameter,,,,,,confirm with a cam grinder if your springs will work with a given cam,,,,,,,,
Thank you for info on the micrometer very helpful
No problem!
Learn something new every day! I allay thought the purpose of a beehive spring was to provide extra clearance for higher than stock ratio aftermarket rocker arms
Ty, glad it's helping
Great videos, really good information!
Glad you like them!
I remember back in the mid years 2000 people were breaking Comp behive 918 springs and Manley single coil springs. So dual springs were sold to help guard against dropped valve.
A Pac or Psi would have solved that issue
That happened when Comp stopped buying springs from PAC, and started sourcing springs from a company outside of the United States. Comp kept the same part numbers. The fix was going back to a good spring like a PAC. But Comp never did.
@@v8packard comp junk
Thanks for the information!
You bet!
Another great video
Glad you enjoyed it
Great video
Glad you enjoyed it
@PowellCams for sure I enjoy all your videos learn a lot from them
Thanks for the video.
You're welcome!
Damn good job explaining valve tran
Tyvm
Great Videos Thanks
Glad you like them!
Thanks Dan !!
@@bruce1816 u bet!
LS Botique shop, LMAO! I`m gonna remember that........I was waiting for ya to go to the cone shaped spring, I want to try them but i`m collecting information on them first.I understand that they don`t have a resonace frequency that will be encountered in an automotive application which sounds good to me. However the only application I`ve seen is hydraulic stuff, do they run any solid app stuff with them?.
Comical springs have issues, beehives are more stable
Class is in session!
Ty!
@@PowellCams you're welcome!
I was afraid about anything you saw with triple springs & high seat pressure as something has to wear. My 5.3L (24X LS truck) grandpa grocery getter is running stock springs with a motorhome early RPM torque cam. I have not worked on race cars in 35 yrs or been into casino, but I am betting on longevity. Mass in motion has to be light weight or it gets expensive quick! Thanks kindly for this info.
Welcome!
Never gave harmonics in the spring a thought. Thanks.
Happy to help!
And I show them that spring mic and explain that and they still look at me like I'm crazy. 😂
No doubt
go information. you need to also check your actual rocker arm ratio. i have found that many oem and after market rocker arms ratios do not match specified or advertised ratios this will affect your spring and cam set up.
Great point
an engine building channel said that there are some radical cams that have a .002 dip just before the opening ramp. he didn't say why, said call crower. i called and they said dave and bruce used it but they didn't know why. my guess is it makes the opening more radical but was wondering if you might know since you are a cam grinder?
@terrysmith8133 why would u want a pothole before the opening ramp?? Most likely what there seeing is wear in the master plate causing this issue.
How is spring rate of the springs determined by the camshaft design ? (Formulas)
There is wasayyyyy more than spring rate involved
My personal preference, if possible I'll take beehives or conicals all day over a dual.
Beehive springs have a smaller and lighter retainer as well. They really work great.
Always
@@PowellCams They must be good. My 2003 5.7 ram went 356k miles on the factory beehive springs before one decided to break. The replacements, still a Mopar beehive but with a damper on the lower part.
Oh yeah and one more thing, I also have the same blue valve spring pressure tester device. I used to use it a lot back years ago😂😂 the one I have is much much more dustier than yours
I bought mine new about 20 year's ago
Your welcome
U2
I had no idea how springs bounced around like that video clip showed 😮
That was a out of control scenario, but they do move around
Ive made new billet cores for tractor cams. Tractors usually run flat tappets but the blanks I made were for rollers. Ive noticed that the lobes are usually shifted off front to back probably to help with making the flat lifter spin. Ive noticed if you put the lobes in the original location when making a roller, the roller will not ride in the center of the lobe.
I was wondering when you grind a flat tappet cam do you have to pay attention to which way the lobe taper is. Are they always larger towards the front or the back or is it engine specific.
Some go all same, some half one way half the other, also ft lobes are offset some amount, chevys are .030, so you need to know lifter bore locations to do a roller.
@@PowellCams so when you grind a flat tappet camshaft do you have to watch which way you taper the lobe
@@TheJohndeere466 correct
Had a summit house brand pontiac cam recently with the taper ground on the wrong way. Lifters wouldnt spin. Luckily caught it on the run stand. Swapped ot out for a eglin brand cam that had the taper on the right way but taper was only a couple of thou and still not all lifters spun. Got the core reground by a local cam guy and problem solved.
,,,,,,,,,,,,,Thanks big time.....I have been settin spring heights and cutting valve seats for harley twins for decades......I always tought the more clearance to coil bind would be safer.........Spintron info was not around in the 1980',,,,,,,,,,,,we did with springs as to what the cam grinder recommended,,,,,,,,I'm lucky I never got in trouble with jobs,,,,,,,,,,,,,,,,,,,,,,Today ,,, the beehive and ovate conical springs ; make dual and triple springs obsolete.......but , ya use what ya can afford........Harmonics and resonance , are terms of deep science that engine builders were in the dark about,,,,,,,,,,,,,,,,,,the web has spread eons of education , from the manufacturers ,and sema shows, ,,,,engine expo,, podcasts,,,,,,,,,hell I love engineering ...
Very welcome, glad it's helpful 🙂
so what do think about conical springs ?
They break alot, they have some inherent problems
@@PowellCams well 1218 it is
I remember people doing this stulid stuff before there was Internet.
Definitely
So years ago i had my ls403 stroker with ported heads give up a valve head and mess up my cylinder. Was pushing 18lbs boost texas speed cam 236/ 242 601/610 114 lsa with the dual springs. Could this have been caused by the springs or maybe the guide? Ive always wondered.
It broke the head from the stem?
@@PowellCams yes. The big piece popped off and banged up my cylinder and forged pistons.
@johngatsby1473 that most likely a bad valve, it's rare to see that happen., what was the ptv clearance?
@@PowellCams I honestly don't remember all the specs but I did use top notch everything because it was for a 1000 + build. I can't even remember what valves, Manley I believe. Wrecked my life...10k into building and it ran maybe 100 miles. Pretty disappointed. Still have everything in the garage and thinking about doing it again but...
Do you think I should get rid of all those valves in case it was a bad run?
Springs are complicated and oversimplified by marketing and capitalism. In the gun industry I saw this often. Great video
Yes, I agree!
So my guess is if I’m replacing my factory springs that have an installed height of 1.8 with new springs that have an installed height of 1.8 can I just swap them out and be good?
Sure
Just do it man. Cause you ain't sayn nuttin.😮
@terrencehall7264 not sure what u mean?
Now that we have beehives, why are the traditional springs still being made? Insane!
cost and application
Exactly why 4 valve overhead cams are so superior to 2 valve pushrod valve-trains.
I agree, but... pushrod engines are cooler
So if going with a ~.550 lift cam in an LS, where is the dividing line between going with ls3 or even ls6 springs vs 1218s with shims?
A ls6 would be more than adequate
@ourback There's quite a few springs in between and a couple of commonly used ones.
My truck is a perfect example of why we shouldn’t use those dual springs. The valve train was always Noisy with them!
Definitely
Maximum Effort
Definitely
I'd like someone to do something on profile design. (Acceleration curve, deceleration curve, velocity/eccentricity, float cover, surge & vibration avoidance, etc.) Anyone seen this on UA-cam?
@camshaftcasting1451 no, and almost no lobe designer is going to freely talk about that stuff
Thank you for your knowledge and videos USA 🇺🇸 TRUMP
You're welcome
⚒️🪢😂😂😂😂
👍
Steve Morris broke a valve spring out on the road traveling from race to race. Maybe you saw the video. That is harder on springs than the trailer queens that only drag race. If you’re going at a constant speed that coincides with the destructive harmony of the spring. I’ve always felt that is the secret to free energy I.e. dynamic harmony. The Tacoma Narrows Bridge demonstrates this. Blow gently across the edge of a taut ribbon. The energy exhibited seems more than the energy induced.
You are promoting beehives but have you ever dealt with conicals? They seem to have an advantage in coil bind.
ua-cam.com/video/XggxeuFDaDU/v-deo.htmlsi=jR4FyqbBPHUqZPG8
Conical's have trouble living a long time, the shape has issues.
@@PowellCams Thank you. I hadn’t heard anything after they were first introduced.
I have noticed that I keep getting unsubscribed to your channel...
Only the cam channel, not the machine channel...
odd i had someone else say that, idk how that can even happen
@@PowellCams Me neither... It happens with some of the gun channels that I follow, but typically not with the automotive channels...
Maybe camshafts are as controversial as firearms and we just didn't realize it... Lol...
Great video by the way... Hopefully it is eye opening for a lot of people...
@@chevytough8629 lol