air foil worth it?
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Joined: Feb 2008
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From: Ft. Worth, TX
Car: 87 Iroc-Z
Engine: 305 5.0
Senior Member
Joined: May 2008
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From: SF bay area
Car: 86 Camaro iroc-z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.42 Posi
Re: air foil worth it?
10 horsepower outta the box 
well little stuff like that wont make much of a difference when driving around town. but that added up to some more small modifications, like a ram air setup, de screened MAF, siamesed intake runners and plenum, then you might feel it

well little stuff like that wont make much of a difference when driving around town. but that added up to some more small modifications, like a ram air setup, de screened MAF, siamesed intake runners and plenum, then you might feel it
Joined: Feb 2002
Posts: 3,462
Likes: 4
From: N. Illinois
Car: 92 GTA/ 00 TA
Engine: 383/350
Transmission: 700R4/T-56
Re: air foil worth it?
Unless you have some serious mods done to your intake or the airfoil is only about $20 it's a waste of money.
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From: Carson, CA
Car: '88 GTA, 90 Formula
Engine: 5.7 TPI, fed growth hormones
Transmission: 700r4 4u2?
Axle/Gears: 9bolt
Re: air foil worth it?
If the stock throttle body is your bottleneck, it works wonders. However, if your throttle body is the major bottleneck, you'd be much smarter upgrading to a bigger throttle body, which have these things made into them.
TA
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From: Northeast CT
Car: '89 IROC-Z
Engine: LSx
Transmission: T-56
Axle/Gears: 3.42
Re: air foil worth it?
Like stated above, its just a supporting mod, by itself its pretty much useless, but put in with a some other decent engine mods and it might do you some good.
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: air foil worth it?
I still think there should be a sticky for airfoil questions.
https://www.thirdgen.org/forums/tpi/...i-airfoil.html
https://www.thirdgen.org/forums/tpi/...i-airfoil.html
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From: Bright, IN
Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: air foil worth it?
I have one I no longer use since upgrading to a bigger TB with the splitter already shaped as an airfoil.
If you plan to get one anyway, $20 + shipping and it's yours. PM me.
It's a TPIS, which is a little better looking piece than the one shown in your link.
If you plan to get one anyway, $20 + shipping and it's yours. PM me.
It's a TPIS, which is a little better looking piece than the one shown in your link.
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Joined: Aug 2008
Posts: 47
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From: Merritt Island, FL
Car: 1991 Chevrolet Camaro Z28
Engine: 5.7L 350
Transmission: 700R4
Axle/Gears: 2.73
Re: air foil worth it?
Honestly I did notice a difference when I first put it in. Car seemed to pull a little harder. Nothing major, but I could tell the difference.
Joined: Jul 1999
Posts: 10,950
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: air foil worth it?
I've always said its better to get a 52mm throttle body with an airfoil already in it.
Joined: Dec 2008
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From: Norwalk, CA
Car: 91Z28
Engine: 5.7 ls1
Transmission: 4l60e
Axle/Gears: 3.42
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By itself, on a stock engine, pretty much worthless... 





