08-12-2017, 07:53 PM
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#20
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: Not Your Average Overheat Question
2500 bare min on cfm fan for a big block! 2 fans @4200 means they both have to be on all the time. One fan is only 2100 CFM This isn't enough to keep the BB cool!
The turns on the carb are starting points not the rule. The idle in park you need to adjust them to the max vacuum period! No question about it. It's the only way to do it. 2 turns maybe right for your setup but until you do the adjustment trust me it needs to be checked. Check out their video on it.
Cooling. Rule of thumb!
1,250 CFM for a 4-cylinder
2,000 CFM for a 6-cylinder
2,500 CFM for a 8-cylinder
Note: Big horse power means big fans!
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71
Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour
http://upstategmtrucks.com/
Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!
LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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