I hadn't seen Bill for about 25 years, so it was great to see him still active and still explaining things for the less knowledgeable. I remember watching in awe as he assembled his 427" small block for his Nova in the days before he decided to go Super Stock racing. I stumbled across this UA-cam channel by accident as I'd sworn off racing years ago, but still need entertaining. Now I'm subscribed, proving one never fully recovers. (-;
David Vizard made a book called Performance with Economy. In it, he mentioned valve size. This pertains I recall, only to SBC heads. He said if you're not going to routinely rev above 6000 RPM, installing the larger 2.02 valves isn't all that beneficial. He then added, it's beneficial to use the 1.6 exhaust valve as it helps exhaust flow. My wording isn't exactly what he said, but probably close enough. I don't think he was talking about heavily ported heads. For a daily driver car or truck that's mildly modified, It would be neat to hear Bills thoughts on this scenario. I did this 1.6 modification with some World Products SR (stock replacement) heads on my 350. I also did some pretty heavy port shape modifications on the intake side, widening the top of the port runner then reshaping the contour. Tho these were both stock 76cc heads, there was a very noticeable difference iny seat of the pants-O-meter. My mileage didn't change, just the power. The exhaust note was noticeably different to. Nicer .......I think I just wrote a novel 😁 Thanks for your channel. I've been binge watching tonight. Neat stuff and I like your pace. 👍 Some guys move too fast.
Thanks Randy, all good points. This discussion is giving me content to discuss for my next video. Bill Little, if you are watching, Randy would like to hear your thoughts. AG
Big Thx for another Informative video with Bill..... Looks like He's got All the tools & Experience to get the Max Hp flow from Any head or engine !! .....Watching the wide Open inverted valve Port flow was a mind blower.....Never seen that before !!.....The Spintron video should be Amazing......
David Vizard in his Porting and Flow Testing book relates his friend, I think it is Roger Helgerson, has a step up transformer to get line voltage up to 10 to 15 volts over incoming line and then regulates it down so he gets a constant voltage throughout the day and day to day.
Just put a set of those off a 604 crate motor onto my .040 forged flat top 327. Had 3500 miles on fresh build. Had 58cc 305 heads stock. Now has aluminum gmpp fast burn heads with new dual valve spring from Comp for their 30 30. I'm running them with a Schneider 137F solid flat tappet cam.480 lift with ,015 lash. Running guide plates with the 1.5 aluminum bowtie SA roller rockers for the 604 engines. I shaved the width of my feeler gauge down so I could set lash with an SA rocker. I'm running a 3500 stall 10 inch convertor. Got it running in my Monte Carlo today. It's got gobs of power, it's unreal now and it ran like a raped ape with them 305 heads before they'd float the valves low 5k rpm
Thanks for the great video. Also thank Bill for the valuable information. I have a new set of fast burn heads bare. What is the casting number on yours?
HI Bill ! Thanks to share your knowledge to us ! I am Brazilian and follow your videos on UA-cam ! Thanks . I have a S10, with 383 SBC with Fast Burn Heads. At this moment we are review all the engine check measures from Orings, bearings, etc . Based on your experience it make sense to ported this pair of heads ? Have you did before ? Some gains ? Are you able to share some experience with this pair os Heads ? Thanks Bill, really appreciate your time
I wish Bill could pick up right where he left off, right there at the end it was really getting interesting wish the battery had held up. Would love to spend the day with him and pick his brain.
Thanks Steven. Lots of great comments about Bill, my viewers love him. We will do more with Bill. He is away racing his SS car at the Dutch Classic right now. AG
Yup, thats a about what i thought they'd flow. They would work really good with like an Extreme Energy 274 cam(flat tappet) which are .487 intake and.490 exhaust on a 110° lsa, 232/236 @ .50 duration. That would make for a zippy combo if you were at 10:1 compression or higher!
$2700 for a pair of those heads is pretty crazy ! You could buy CNC AFR heads for that ! Yes they're decent for what they are but GM better get with the times, they're not selling those at that price, they're collecting dust on the shelves im sure.
This is completely bogus and has very little to do with real life. The valves are in a static condition, so you are not taking into account the pumping action of the valves and the surrounding chambers. How can this predict much of anything as to how the head will perform?
I hadn't seen Bill for about 25 years, so it was great to see him still active and still explaining things for the less knowledgeable. I remember watching in awe as he assembled his 427" small block for his Nova in the days before he decided to go Super Stock racing. I stumbled across this UA-cam channel by accident as I'd sworn off racing years ago, but still need entertaining. Now I'm subscribed, proving one never fully recovers. (-;
Glad you found us UncleVom, the next video will feature Bill Dyno tuning a 930HP Big Block.
Great video! Bill is Canada’s David Vizard!!
Flow anomaly in the evening is probably a voltage drop in the power grid
Thanks Gary. You have named Bill appropriately, if you watch my later dyno video you will see Bill there as well. AG
Wow. Very insightful. Bill is a very patient and good explainer of concepts. Professor Bill.
Thanks Dino, I am lucky to have Bill to help me. More videos with Bill soon. He will be busy racing this week. AG
David Vizard made a book called Performance with Economy. In it, he mentioned valve size. This pertains I recall, only to SBC heads.
He said if you're not going to routinely rev above 6000 RPM, installing the larger 2.02 valves isn't all that beneficial.
He then added, it's beneficial to use the 1.6 exhaust valve as it helps exhaust flow. My wording isn't exactly what he said, but probably close enough.
I don't think he was talking about heavily ported heads.
For a daily driver car or truck that's mildly modified, It would be neat to hear Bills thoughts on this scenario.
I did this 1.6 modification with some World Products SR (stock replacement) heads on my 350.
I also did some pretty heavy port shape modifications on the intake side, widening the top of the port runner then reshaping the contour.
Tho these were both stock 76cc heads, there was a very noticeable difference iny seat of the pants-O-meter.
My mileage didn't change, just the power.
The exhaust note was noticeably different to. Nicer
.......I think I just wrote a novel 😁
Thanks for your channel. I've been binge watching tonight. Neat stuff and I like your pace. 👍 Some guys move too fast.
Thanks Randy, all good points. This discussion is giving me content to discuss for my next video.
Bill Little, if you are watching, Randy would like to hear your thoughts. AG
Great video Allan.
Thanks to Bill for sharing his Shop, FlowBench and most of all his knowledge.
Have a great day.
thanks Ed. Bill is away racing in Pennsylvania right now. When he is back we will do more videos with him. AG.
Big Thx for another Informative video with Bill..... Looks like He's got All the tools & Experience to get the Max Hp flow from Any head or engine !! .....Watching the wide Open inverted valve Port flow was a mind blower.....Never seen that before !!.....The Spintron video should be Amazing......
Thanks Tom. Glad you are enjoying my videos with Bill. we will do more videos with him for sure. AG
David Vizard in his Porting and Flow Testing book relates his friend, I think it is Roger Helgerson, has a step up transformer to get line voltage up to 10 to 15 volts over incoming line and then regulates it down so he gets a constant voltage throughout the day and day to day.
Thanks Dale, good information, AG
Just put a set of those off a 604 crate motor onto my .040 forged flat top 327. Had 3500 miles on fresh build. Had 58cc 305 heads stock. Now has aluminum gmpp fast burn heads with new dual valve spring from Comp for their 30 30. I'm running them with a Schneider 137F solid flat tappet cam.480 lift with ,015 lash. Running guide plates with the 1.5 aluminum bowtie SA roller rockers for the 604 engines. I shaved the width of my feeler gauge down so I could set lash with an SA rocker. I'm running a 3500 stall 10 inch convertor. Got it running in my Monte Carlo today. It's got gobs of power, it's unreal now and it ran like a raped ape with them 305 heads before they'd float the valves low 5k rpm
Thanks for sharing your experience. AG
I really like the way Bill thinks. His Super Stock car proves he know his stuff.
Thanks David. Bill is operating on a high level for sure. We will do more with him by popular demand. AG
Thanks for the great video. Also thank Bill for the valuable information. I have a new set of fast burn heads bare. What is the casting number on yours?
Thanks for the question Don, the casting number is 0-12367712. AG
Thanks for sharing your knowledge! I am enjoying learning from your videos.
i appreciate your comment Scott. Thanks AG
HI Bill ! Thanks to share your knowledge to us ! I am Brazilian and follow your videos on UA-cam ! Thanks .
I have a S10, with 383 SBC with Fast Burn Heads. At this moment we are review all the engine check measures from Orings, bearings, etc . Based on your experience it make sense to ported this pair of heads ? Have you did before ? Some gains ? Are you able to share some experience with this pair os Heads ? Thanks Bill, really appreciate your time
Hey Bill Little, can you respond to Felipe please? AG
Thank You again for another great video
Thanks STP, glad you enjoyed it. Lots more content to come. AG
I wish Bill could pick up right where he left off, right there at the end it was really getting interesting wish the battery had held up. Would love to spend the day with him and pick his brain.
Thanks Steven. Lots of great comments about Bill, my viewers love him. We will do more with Bill. He is away racing his SS car at the Dutch Classic right now. AG
anxious to see the spintron
Thanks Robert. Bill is away racing this week but we will catch up to him when he gets back. AG.
Interesting, a mildly worked set of cast iron Vortec heads can flow 250 intake 200 exhaust.
Thanks for your comment Lee. The Vortec is the best OEM head for sure. AG
Great video what cam would Bill make for this head on a l31 roller cam block?
Hey Bill, can you comment please? AG
Yup, thats a about what i thought they'd flow. They would work really good with like an Extreme Energy 274 cam(flat tappet) which are .487 intake and.490 exhaust on a 110° lsa, 232/236 @ .50 duration. That would make for a zippy combo if you were at 10:1 compression or higher!
Thanks for your comment Doc. AG
Bill is awesome
thanks Paul, we all agree on that point. AG
Very good information!! Thank you!!
Thanks' for your comment Kbros. AG
Thank you very edgamactional.
Thanks Donovan. AG
God bless Bill.
I learned a few things... thanks!!
Glad to hear, thanks for your comments as always Eric. AG
Good heads.
Thanks Tom. We will se how they work on Mikes 350. AG
Great vids guys
Thanks Paul, glad you enjoyed it. We will do more with Bill. AG
Have you flowed ls1 heads ?
Thanks for the question Utah, Bill can you please respond to the question? AG
Can you post the flow numbers please
Thanks for the question Daniel. I will take a screen shot of the print outs for the intake and exhaust ports and post them on a future video. AG
What makes them fast burn? Quench area?
Heart shaped combustion chambers.
Thanks for the question @, Kens answer is correct, it is in the combustion chamber design.AG
Thanks
Chamber design and sparkplug position is the big one , port design is a little bit also
$2700 for a pair of those heads is pretty crazy !
You could buy CNC AFR heads for that ! Yes they're decent for what they are but GM better get with the times, they're not selling those at that price, they're collecting dust on the shelves im sure.
Thanks BEANS. Most of them start out life on a CT400 or ZZ383 or similar engines. AG
This is completely bogus and has very little to do with real life. The valves are in a static condition, so you are not taking into account the pumping action of the valves and the surrounding chambers. How can this predict much of anything as to how the head will perform?
Thanks for your point of view Dave.AG
hey i like the valve refacer
Thanks Allan. AG