Stop Engine Overheating! Build the Fan Shroud Your Race Car Deserves.
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- Опубліковано 5 вер 2024
- This episode shows how to build a fan shroud. This Crate Racing 602 Sportsman Late Model was over heating and running too hot during racing. We determined very quickly the missing fan shroud was causing the radiator to overheat and boil over. We show a fast, simple, and inexpensive way to build a fan shroud that will work just as good for any race car class (Street Stock, Hobby Stock, Pure, Bomber, Modified, Super Late Model, etc). BUT we also show you WHY not running a fan shroud with your cooling system will cause engine overheating.
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i love the fact that you do & show things that everybody can do without all the fancy tools. Theres to much of the just buy it now a days people dont want to build it anymore props to you.
Thanks bud, I sure appreciate the kind words and you watching our videos. And your channel is pretty freakin awesome.
I built my fan shroud step by step today by your video. Thank you Jason for this video and all your others. You’ve made my off season fabrication a lot easier !
Thats awesome Stephen, Motivates me for sure to know it was helpful.
Thanks for showing us a simple way to build an effective fan shroud and explaining how the air flows from the fan. I learned a few things I never would have thought of.
Absolutely!
Great tutorial and nice work.
Bought my Chevelle, previous owner removed the fan shroud. No idea why, or if he thought it was inefficient or saved weight.
I’m of the opinion the engineers for manufacturers are not looking to spend money where they don’t have to. Therefore if a shroud wasn’t important, they wouldn’t use one.
You are absolutely right, and also we absolutely are not building or using these combinations in any way like originally designed or intended either though. Sometimes you have to have even more than what was originally designed, not less.
Thanks for the video, I just built a shroud using your method...
I did a V8 swap and had no clue how I was gonna build a shroud... your vid made it easy to build it... thanks again!!
Glad you found it useful sir
Dude this was the video I've been looking for, the diagram of air flow was the best and answered the questions I had.
Thats what we are here for Vince thanks for the feedback and thanks for watching our channel!
I have always had a shroud on all my cars and always put it in around the middle of the fan blades. So half in and half out. I never knew why but you explained it to the T. Excellent video as always Jason. Looks like all this work is helping you lose weight.
Thank Dave, I had a major surgery last week and HAD to get some weight off to get in better shape for it. That and my kids were raggin me saying the fire suit was lookin like spandex :)
@@DIRTRACELIFE Congratulations on doing that. I'm in the losing weight mode myself. Being 53 makes it harder to do than when I was younger but still getting the job done.
You put a lot of work into that just to prove you don't need all the expenses tolls, but as for a brake if you have a racecar it's all but a must have toll !
Sure not going to argue with you on needing a brake Dana! I do have a 6 foot brake that I built but because my shop is small I usually only set it up the shop when doing a body. But my brake is not as good as a purpose built professional unit so I am hoping to move up to a better one at some point in the future.
I think one of the biggest challenges to a person who wants to get into build and racing is all the special tools required and skills you must learn to use them. So yes I am trying to show how to work with less equipment but there are some tools that, if you are going to be in this sport, you will need to buy.
Thank you for watching my channel and giving great feedback.
Hey what track are you at with your video's of the modified?
So thankful for this video, I did everything you instructed and I just won my first race of the year because I didn’t overheat or even get close!
Man that's awesome, glad this was helpful.
I wish I saw this before almost finishing my shroud. I chose titanium... Even harder to change after it's all tacked up. I now know I need to add a short tube for the fan to sit in rather than a hole in sheet metal coplanar with the back of the blades... I thought having it all recessed and protected inside a box was a nice idea.
Great video, I appreciated your whiteboard explanation most!
VGN, to be clear if you are tigging titanium sheets to build a shroud then don't think for a second I have you beat on ideas. You've been doing something right to get to that point! I appreciate the feedback but suspect you make some slick fabs yourself that stand up under scrutiny 😀
Not only do I enjoy your how to videos, I like the Why you need to do it. Keep them coming. Ty
Thanks Chad, these like this where I can try to address a topic that can make a big impact on helping racers are by far my favorite ones to do.
What a nice tutorial! Thank you man!
Thank you for watching out videos sir.
I'm doing a shroud, now that I've seen this. I was worried about the sides not getting any suction, but better than what I have - none.
Oh, and smart way to get the center! Can't miss.
Thanks sir, If I could build what I consider a "perfect" shroud then I would make the box itself about 2 inches deep between the radiator fins and the shroud plate that way there is plenty of room for the air to come through those corners and make the turn into the shroud. Yeah its going to darn sure be much better than nothing at any depth but I agree a deeper box would make it even better.
Once again .... Excellent video, great content, great walk through
Thanks Jeff, Appreciate you watching.
Thank you for this excellent video. Yes, applied physics, whether its on a Jeep or a Chevy the fan cowling is important! Helped me a lot for my current project car. Carry On Sirs!
David, you are just the kind of person I am trying to reach. Just trying to share what I have learned to hopefully help others be more successful. Thanks for the feedback. I do appreciate it.
I had a great auto shop teacher in High School back in the 80's, taught us this back then, ALSO using to much antifreeze can cause overheating... Its an antifreeze not a coolant!
Just a little bit added can be a good thing and agreed too much and you are definitely going backwards!
I would have never guessed that I really appreciate you sharing your knowledge with us I don’t have a fan shroud I run a plastic fan 3/4 to 1/2 inch from the radiator but i really never got to finish a race due to my car pushing towards the wall the most I put on it was 17 laps in a feature race I was right behind John Schneider before I got off and I was at 170 degrees
Thanks for the feedback Mark, I'd swear I've watched you race at Camden. Am I right?
@@DIRTRACELIFE couldn’t have been me the only 2 tracks I raced with it was Pike County Speedway and Baton Rouge Raceway
Roger that, it was a look alike car. :)
Good video great info. Been running a 604 in my late model for years and just recently we started doing what was mentioned in this video and our problems are gone. If your running gas especially pump gas you need to take that radiator out every week and clean it. It’s the easiest way to know your radiator is clean.
If the rules allow it and your not afraid to spend the money you can switch to methanol and overheating will never be a concern but it opens the door to other problems and you’ll have to change oil more often. And with methanol guys actually have the opposite problem. Not being able to get hot enough. So proceed the methanol route with caution.
We can run E85 which burns at 1.5 times the rate of gas and also runs cooler. When I put my fuel system in, I used all E85 compatible parts but am on gas right now. But yes, I do see E85 in my future if I do go to a crate 602. I know it runs cooler but it also raises the torque curve on lower rpm in those engines.
The little 4 foot kiddie pools are by far the way to go. Ilike to just let it soak overnight. Very effective at getting those flus clean.
@@DIRTRACELIFE yep I use that too
Very informative tysm...building a full size street stock this year ...gonna have me a shrowd
Thanks James, appreciate you watching sir.
Thanks for the education !! .. I'm learning a whole bunch on the why's and wherefor's that you present ... KUDOS !!
Thank you 61Merc. I sure appreciate you watching our videos as well.
I have seen dirt track racers build a COMPLETE shroud between the heat race and the feature. If the radiator is clean, the thermostat is good, and you are still running warm, you better build a shroud.
100% right sir. If you are overheating, know the Rad is clean and coolant is flowing correctly, and don't have a shroud, well its not rocket science. Gotta direct that air!
Great video. We have had a overheating problem and you have inspired me to build my own. Thank you!
Glad it was helpful Raleigh and appreciate you watching.
Great video. We have a shroud but still hitting 240 temp. Gonna compare and maybe build a better shroud.
I struggled with my crusa ss keeping the engine cool on gas with the 24 inch rad. I hadto get everything top notch as well. Timing, 4 blade 19 inch fan, soak the rad a couple times in a kiddie pool per season, air directors, etc... it can be a challenge and ya sure can't ignore any piece of it 😉
Awesome, this was awesome!, Thanks
yes sir 😀
Amazing video
I'm glad its been helpful
That’s is such as simple design it’s beautiful and effective
Thanks Mr James, Appreciate you watching.
great work!
Thank you sir.
I appreciate the effort you put into making this video. Liked and subbed.
Thank you Les, I sure appreciate you watching!
You should have added a spacer between your sheet and the rad so the air can be pull thru the entire surface but good job it will be better than the way it was!
I think less than a 1/2 inch gap is a problem and I think anything more than 2 inches and there probably is not any more gain in flow. Just my thoughts on what the range is. Appreciate you watching and the feedback.
Love your videos ...keep up the good work
Thank you Steve, I appreciate it.
I used a box fan while watching the video and the air does circle around, I cut a napkin in a one inch strip and moved the napkin out front
I tell you Jeremy, You'd think whether or not to run a fan shroud was like politics! Some folks are like Yep I agree run one and others are in the camp "your nutz, just get it close".... If I do another fan shroud video I am going to steal this from you and use it in the video! Maybe tape a bunch of christmas tensile around the radiator on a race car and then fire it up with no shroud to show all the wierd ways air is moving that we don't normally think it does. Yep, I'm takin this idea and running with it! (Don't worry, I'll tell them where I got it from :)
Excellent video. There is a little leakage on the sides of the shroud.
I saw that too. Blew my mastic tape out. Next up... Gorilla tape :)
I thought about that too.
What if the aluminum went past the edge of the radiator and had a 90 degree bend too?
It would provide a little more rigidity, and then anything not sealed up has air coming straight at it anyway.
Atmosphere forced through a small crack I would guess would build high enough pressure to cancel any pressure coming at it from the inside. Kinda end up atmospheric pressure sealed?
I know thats kinda overthinking it... but that's the part I like about race cars.
Wb3, i agree a 90 bend past the edge would be enough... but for now she got some gorilla tape. Never go to track without that and zip ties :)
great simple tutorial - thank you! what is the power tool that you use to cut the aluminum?
Thank you Damian and thanks for watching. That's a Makita power shear I have had literally forever. They don't make that model anymore but here's what the new ones looks like @ amzn.to/3JAqKT5 . They are more limited on making tight turns but perform much better at running long straight cuts because they are in essence like scissors.
I run a single pass 26 in radiator 4 blade Fran 3/4 in away from the fins no shroud on a modified never gets over 210 degrees. On 110 race gas. Running proper pulley system helps slow fan speed.
I agree on the reduction pulley and do that as well!
I had to change the spacer on my set up. I went from a 2" spacer to a 1-3/8" spacer. That change has forced me to rebuild my shroud, and this video got me off the fence of if I should spend the time to do it. Thank you. I have one question regarding the fan bolts. I want to change from bolts to studs. Do I have to use hardened grade 5 or 8 studs, or can I use standard (grade 1)? I sure don't want that thing coming off at 5,000 RPM.
I would not use less than grade 5's. The reason being anything below that is going to yield so easily that every time you take it off and put it back, you end up over stretching them a bit more everyone. Eventually, they are going to break. 8s may be overkill but grade 5s sure aren't.
Great video, I just found your channel. Can the the same ( or if I apply the same) principles with electric fan work? Looks to me the shrouded electric fan is starting with the problem of fan placement to deep in the shroud. What is your thought?
I think most electric fans designed already in a shroud are probably engineered for the blade shape to work well with the placement of the fan in depth. HOWEVER, I also believe there are applications where size and room limitations are a factor on any repurposed fans. For example, I have seen plenty of ford Taurus fans repurposed but is that fan designed that way partially to clear the exhaust manifold even if it gives up some ability to push air. In aftermarket, I question some designs, were they really engineered the best they could be or are they designed to create the most compact design with minimal materials used. in my opinion, it is possible there are electric fan designs that do sit the fan in further than what would be most capable but it made the overall design more robust and made the fans cheaper to build as the reasons they did it. I didn't give a clear answer here, I know, but at least I tried to give you some of my thought process on comparing the two.
Thanks, that is appreciated. Building a shroud now (thank you again for the video) to use with the E/fan. We'll see how it goes afterwards.
great video thank you
Thanks Nick
Good video
Thank you Eddie, Appreciate you watching.
Running a10amp fan in a jeep 4,7 any comments on Holly shroud
I've never run electric fans in racing because they have always been against the rules 😞
What name brand are those snippers u used to cut the plastic 1in rips with
To be honest they are older than me and not named/tagged. They are called "sheet metal shears" and are for aluminum siding and made just like normal scissors. And I have seen them still sold in hardware stores. They are not tin snips which are very different.
Ok Junior I was thinking this set of Shears was made by Irwin now and I looked it up and YEP! they sure are and pretty cheap too. Here's an amazon affiliate link I made for them if you want to check them out. amzn.to/2ZEhiMb
Can you tell me where to find that plastic?
I have been buying it from a local race shop but all your large online race part sellers have it as well. Speedwaymotors calls it "plastic sheets" and summit racing has the Allstars brand and you can find it by searching "rolled plastic"
@@DIRTRACELIFE thanks bud
Can you leave a link or tell me what the tool was called that you used to cut the hole out ?
You can buy the electric sheet metal shears from harbor freight . Word of advise when cutting circles with this tool take your time don't force it
They no longer make the Makita shears like I have but here is a link to the model they make now. amzn.to/3jVD8l1
Major is correct, I think there is a Harbor Freight Bauer version of these as well so check them out if you have a local HF store.
I run leafs up in pa and wondering if u know anything about this fast boy setup and if so if u could talk about it I run the set up but trying to learn new tricks
I ran the setup for two seasons. I'll sure try and help if I can.
how far is the actual shroud away from the radiator look like its up against it and is it ok if its up against the fins thanks
About one inch and I would say that is the minimum. 2 or 3 inches would likely help give the air a better flow path if you can do it without having issues.
How close to the radiator should the fan be??
I like 4 inches as my minimum where I can get to the bolts without having to pull the radiator. The fan will pull better if you have a shroud that will let you get out toward 6 inches of space but that ONLY with a well built shroud positioned on the fan.
@@DIRTRACELIFE Thanks for the info. Great video.
How much of a temperature drop did you notice after the install???
I'm not sure sir. Dylan was overheating and getting over 240 and this stopped the issue but I will need to ask him what he averages for temps now.
@@DIRTRACELIFE Thank you sir
Where was this months ago before I bought a speedway shroud I had to chop up, then paid a body guy $100 to build me one.
Sorry Jay, I did shoot this a month ago but held it back to release while I was healing from rotator cup surgery last week.
Guilty as charged :(
The recent radiator installation might have faced issues as I forgot to reattach the bottom portion (lower half of the shroud piece) and overlooked relocating the extended strip of sponge material between the radiator and the front support. Noticed leakage under the engine bay after a short drive. Planning a coolant air pressure test to assess the problem thoroughly. 🤞🏼
Ouch, hopefully not too difficult a repair.