Throttle body modification
Melting Slicks
Joined: Jun 1999
Posts: 2,931
Likes: 127
From: Ashland Alabama
Ive never been a fan of those without supporting mods. When I did the supercharger I used one and honestly couldn't tell a difference after installing it. But on a normal motor I think its a waste of money.
Advanced
Joined: Oct 2014
Posts: 51
Likes: 1
From: Shelton WA
Just to add a couple more cents worth, I think the *theory* behind the airfoil is correct, it's just that (at least IMO) as a bolt on it probably adds as many airflow disruptions as it supposedly removes.
There are several articles both here (https://www.corvetteforum.com/forums...take-mods.html) and at SuperChevy about the bennies of smoothing the airflow through the throttle body - not huge HP, but a few, maybe a slight uptick in MPG and an improvement in throttle response.
There are several articles both here (https://www.corvetteforum.com/forums...take-mods.html) and at SuperChevy about the bennies of smoothing the airflow through the throttle body - not huge HP, but a few, maybe a slight uptick in MPG and an improvement in throttle response.
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Thread Starter
Instructor
Joined: Aug 2014
Posts: 185
Likes: 0
Didn't know at the time that this was also called the airfoil. I know many people hate on that thing lol.. But I lf this gives a better throttle response I'd consider getting it. Or is that just another thing they said about it to sell their product?
Team Owner
Joined: Jul 2004
Posts: 28,181
Likes: 3,173
From: Hartford WI
It probably will make you get more appealing to women, teeth whiter, "johnson" a little longer, etc, etc. If Cliff is right that it gains 11 HP on a HIGHLY modified motor at WOT, you don't have it so you won't gain it except on the Placebo Effect.
Melting Slicks
Joined: Jan 2008
Posts: 2,054
Likes: 120
From: AZ
Your question is not rare so don't take the howls, catcalls, whistles and hooting personally. 
We all want free HP (actually torque); a fantasy fanned by hype in marketing such products. Any "up to" gains, can be negative gains, cost not withstanding.
We all want free HP (actually torque); a fantasy fanned by hype in marketing such products. Any "up to" gains, can be negative gains, cost not withstanding.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
I think it was the same vendor that said their AIR Pump removal kit was worth 20HP.
Maybe 3HP or in that area, if that. A 20HP increase would be expected from a set of headers and a good free-flowing exhaust.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I'm sort of embarrassed to admit that I have a throttle body air foil on my engine. I was taken in by the hype and bought it from Doug Rippie back in the '80s. They're the people who claimed 11 horsepower gain. They did state that it was on a highly modified engine, so at least they were honest about that. It did absolutely nothing for my engine that I could tell and the only reason it is still on there is because I figure it isn't hurting anything.
I just looked on their site and they don't show an air foil as one of the products they sell. I wonder why...
I just looked on their site and they don't show an air foil as one of the products they sell. I wonder why...
Burning Brakes
Joined: Nov 2013
Posts: 914
Likes: 277
From: St. Petersburg FL
Just to add a couple more cents worth, I think the *theory* behind the airfoil is correct, it's just that (at least IMO) as a bolt on it probably adds as many airflow disruptions as it supposedly removes.
There are several articles both here (https://www.corvetteforum.com/forums...take-mods.html) and at SuperChevy about the bennies of smoothing the airflow through the throttle body - not huge HP, but a few, maybe a slight uptick in MPG and an improvement in throttle response.
There are several articles both here (https://www.corvetteforum.com/forums...take-mods.html) and at SuperChevy about the bennies of smoothing the airflow through the throttle body - not huge HP, but a few, maybe a slight uptick in MPG and an improvement in throttle response.
Burning Brakes
Joined: Nov 2004
Posts: 1,057
Likes: 0
From: Warren Ohio