Hey guys, does anyone know the CFM on the stock fans for a 5.7 88' GTA? im thinking about upgrading, but i don't want to accidently downgrade by getting something that flows less air.

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

Good luck and if you find out please post back!
I have asked this question about three times in the past year with no results.

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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Raptor 700R4 Tranmission, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Hooker Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project

 

I'll 2nd Johns reply, noone has ever been able to find this information. Seems to be some deep buried GM secret.

 

so wut should i get to upgrade them?

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

And while we are on the subject, are there any better fans that use the stock mounting brackets for an easy install?

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1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

 

Balck Magic fans are the best aftermarket single fans.

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Hybrid Black 5.7L 5 Speed
'95 Competition Yellow Corvette Coupe ZF6

 

You'll probably never actually figure out the CFM without some sort of testing fixture to test it on. It shouldn't be too hard, though, to determine the RPM of the motor and diameter of the blades.. That should be enough to make a ballpark comparison between fans!

 

Does anybody have a fan shroud for the dual fan setup? I want to put one on my car but I can't find one. I'm sure it would help some.

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'91 GTA
350 TPI
700R4 from Pro-built
T-Tops.
Just a few mods, if you want to find out just line up next to me at a stoplight!
Wife:2000 Grand Prix GTP

 

I don't think my car comes with a shroud. Just dual electronic fans.

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

There is no shroud available for the dual fans on the 88 GTA. Also I don't know that anyone makes fans to fit the OEM mounts.
I replaced mine with Perma-Cool 12" fans. They pull 1200 CFM each and do a very good job but I didn't notice a big gain. These fans come with mounts that go through the radiator, or you can get the brackets.
So I guess that if there was no noticeable difference but there was no loss of air flow, the factory fans flow about the same 1200 CFM.

[This message has been edited by Ozzy88GTA (edited July 28, 2001).]

 

I purchased a shrouded set from Be cool.
Part number 75007 and am very bappy. They flow a total of 2780cfm. Very easy to install!

 

where do i find these? i wanna be bappy too!



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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

I posted a question to Be Cool about the shrouded fan setup and asked how it compared to the stock CFM rating of the stock dual fans. So hopefully we will soon know.