Saturday Night Racer - SBC Running Temperature question

cross_racing LMR Rookie Offline Dirt Tracker For Life!! Posts: 33 Bakersfield	SBC Running Temperature question 07/07/11 at 8:15am Run a Hobby at bako, How hot should i let my engine get before it would be necessary to pull off the track? also what is a good engine fan to use?? Thanks for any input
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ka_jd7and1 LMR God Offline Posts: 1052 Bakersfield, CA	Re: SBC Running Temperature question Reply #1 - 07/07/11 at 8:49am I used to pull off if it got any over 230. The 4 blade racing fans are supposed to pull more air than the 6 blade kind. Make sure you have a good fan shroud, too.
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dannyracer6 LMR Member Offline dr6 Motorsports Posts: 217 Tulare,CA.	Re: SBC Running Temperature question Reply #2 - 07/07/11 at 9:17am 230 if you have good radiator cap and you dont start pushing water out. 4 blade will work fine if you have a good shroud. Any higher temp than that and soon your engine will be toast.
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Andrew LMR God Offline 2006 SMS M.S. champion... more of a PB these days Posts: 1359 Camarillo	Re: SBC Running Temperature question Reply #3 - 07/07/11 at 6:04pm I ran most of a race at 242* with an aluminum head. A good rad cap is a must to keep the coolant from boiling, but you should have checked that before you go on the track anyway. At 14 lbs, water boils a around 260*. As long as the coolant doesn't boil(that's where the rad cap comes into play) you're good.
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mudslinger47

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Re: SBC Running Temperature question
Reply #4 - 07/07/11 at 8:20pm

There is a particular fan/part number that is the "right" fan. There are several different sizes, Cornett Race engines is very very specific about this. And I can tell ya, Pete runs one and his motor on the track never sees 210 or 215, ever. And he runs no shroud. Try to get a hold of Andy Orbetello , he knows the number and works at a Chevy dealership. The china ones "ARE NOT" the same. We were having an over heating prob in a friends mod, Rick Fringer donated one to the cause and we didn't over heat again.

Duane

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32MORGAN

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Re: SBC Running Temperature question
Reply #5 - 07/07/11 at 10:10pm

gm# 405442 4 blade fan is the only way to go. it flat out pull a ton of air, has like 32 degrees of pitch and is 18" i think. it's always worked for me.

p.s. the cost of a good motor in any class is not worth running over 220-230 if your aware of it. check your cooling system thoughly. in the past few years cheap aluminum water pumps have caused problems. make sure the water pump actully has an impellar and that coolant flows the right direction.

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hogracer3d LMR God Offline We bust our a$$ to kick yours-!!! Posts: 3933	Re: SBC Running Temperature question Reply #6 - 07/07/11 at 11:48pm CV Products has a good 32 degree US made copy, in 15,18 and 19 inch
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SawyerRacing98 LMR God Offline Posts: 1056 Bakersfield Ca.	Re: SBC Running Temperature question Reply #7 - 07/08/11 at 9:09am There is this stuff at pepboys called "30below" get it....
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Redalert144 LMR Senior Offline IMCA Stock Cars Rule! Posts: 269 Yuma, Az	Re: SBC Running Temperature question Reply #8 - 07/08/11 at 12:00pm We run Engine Ice coolant, brought the temps down like 10-15 deg
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imracin68j

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Re: SBC Running Temperature question
Reply #9 - 07/08/11 at 4:10pm

It's all about how much water your have left in your radiator. You can run them pretty hot. I've got them up to 250 before. If you ever see a car start dropping temp rapidly get off the track as you have lost water contact with the therm. You have to change the oil any time you get it hot because the oil changes its molecular structure with extreme temps.

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prochampion LMR God Offline HONEY, One Ingredient! Posts: 606 Westmorland, Ca.	Re: SBC Running Temperature question Reply #10 - 07/08/11 at 5:56pm we have a 4 blade fan with a good shroud no holes in the nose and duct work to channel air with the smallest moroso water restrictor, at the nationals we covered half the radiator up to try and get some temp it ran 160 the whole race thinking about taking the radiator hose off next time to get some heat generated
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Andrew LMR God Offline 2006 SMS M.S. champion... more of a PB these days Posts: 1359 Camarillo	Re: SBC Running Temperature question Reply #11 - 07/10/11 at 10:14am I had an engine that wouldn't get up to temp even with a 195* thermostat in it. I drained 10 seconds of water from the radiator drain, and it would run 180* religiously. Go figure.
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dirt33 LMR Senior Offline Posts: 265	Re: SBC Running Temperature question Reply #12 - 07/11/11 at 3:46pm SawyerRacing98 wrote on 07/08/11 at 9:09am: There is this stuff at pepboys called "30below" get it.... Is this the product you are referring to? Been thinking about trying some....
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MODDAD2 LMR Member Offline Dirt Late Models Rule! Posts: 229	Re: SBC Running Temperature question Reply #13 - 07/11/11 at 8:33pm that's it . speedway sells it. its made by a company called Pro Blend they have a web site its hard to find but works great
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old dirt racer LMR Senior Offline Dirt Late Models Rule! Posts: 265	Re: SBC Running Temperature question Reply #14 - 07/11/11 at 8:35pm 40 below just about the best, we did drop about 25 degeres
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dirt33

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Re: SBC Running Temperature question
Reply #15 - 07/27/11 at 3:12pm

What is everyone's thoughts on the actual size of the fan? I have been struggling with cooling problems all year. The next step I am going to take is ditching the 6 blade flex fan for a 4 blade fan. I have a real good shroud currently that I would like to keep using, but it will accept only a 15" fan. I see that CV Products does have a 15" piece.... Would an 18" or 19" fan be way better off given the extra size? If so, I would go with that and then come up with a new shroud. But at the same time, a Stewart Components tech tip urges one to not run any bigger fan than neccessary...??

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cross_racing LMR Rookie Offline Dirt Tracker For Life!! Posts: 33 Bakersfield	Re: SBC Running Temperature question Reply #16 - 07/27/11 at 3:55pm From what everyone tells me a 19 inch 4 blade is the best fan so i bought one, still havn't put it on but i will let you know what happens, I was running a 17 inch 6 blade and it ran on average 240 on the track
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dirt33 LMR Senior Offline Posts: 265	Re: SBC Running Temperature question Reply #17 - 07/27/11 at 4:28pm Let me know how it goes cross_racing. Thanks.
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sj_valley_dave LMR God Offline Love the smell of nitro in the air Posts: 1700	Re: SBC Running Temperature question Reply #18 - 07/28/11 at 9:56am We run a 19" 4 blade GM fan and we run 2-3 rows of tape to get engine to 195-200* even at Bako in August....
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hogracer3d LMR God Offline We bust our a$$ to kick yours-!!! Posts: 3933	Re: SBC Running Temperature question Reply #19 - 07/28/11 at 10:04am sj_valley_dave wrote on 07/28/11 at 9:56am: We run a 19" 4 blade GM fan and we run 2-3 rows of tape to get engine to 195-200* even at Bako in August.... On gas?
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sj_valley_dave LMR God Offline Love the smell of nitro in the air Posts: 1700	Re: SBC Running Temperature question Reply #20 - 07/28/11 at 4:13pm Yep, on gas. At Antioch this year (cold night) we had 5 rows of duct tape to keep temp at 195-200*. Normally 2-4 rows will be about right...
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Missle Motorsports LMR God Offline Sportsman & Modified #57m Posts: 1339 Racecar Ranch, Calif.Foothills	Re: SBC Running Temperature question Reply #21 - 07/28/11 at 5:19pm Dave, which Radiator do you guys use( Dbl.Pass? ) & do you Run a Cooling Additive?
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