Throttle Body Air Foil
Thread Starter
Cruising
Joined: Mar 2004
Posts: 12
Likes: 0
From: Imperial Beach California
Throttle Body Air Foil
Thanks to all the fine people on this forum that have been so helpful to me. I do appreciate it! :thumbs:
Last question (well, maybe not), is it a good idea to install a throttle body "air foil", and if so, which one? I have a 1996 LT1 Coupe. I see that there is a bolt-in style and a snap-in style that is held in by the air inlet hose.
Can anyone help a brother out?
Kind regards to all,
Tony Z. :steering:
Last question (well, maybe not), is it a good idea to install a throttle body "air foil", and if so, which one? I have a 1996 LT1 Coupe. I see that there is a bolt-in style and a snap-in style that is held in by the air inlet hose.
Can anyone help a brother out?
Kind regards to all,
Tony Z. :steering:
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: Throttle Body Air Foil (Defender)
Most folks here consider them a waste of money. I bought one and then after doing a lot of reading through the archives, I ended up giving it away:
http://forums.corvetteforum.com/zerothread?id=648401
http://forums.corvetteforum.com/zerothread?id=648401
Race Director
Joined: Feb 2003
Posts: 18,484
Likes: 1
From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
Re: Throttle Body Air Foil (Defender)
I wouldn't buy one today after hearing all the comments about them and the lack of HP gain. That said I do have one, but paid very little for it.
Intuitively, I still think it may help in the higher RPMS, but nothing to back that up.
Intuitively, I still think it may help in the higher RPMS, but nothing to back that up.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Throttle Body Air Foil (Defender)
My car had one when I bought it, it actually slipped into the intake duct. Another friend's 92 had the EXACT same thing, almost as if it was there from the factory. I left it in there because if for nothing else it helped hold the duct open and made it easier to put it back on the TB.
With my Holley throttle body (useless BTW) I can't use the air foil so I took it out. It's certainly not worth spending any money on.
With my Holley throttle body (useless BTW) I can't use the air foil so I took it out. It's certainly not worth spending any money on.
Le Mans Master
Joined: Oct 2002
Posts: 7,178
Likes: 1
From: Bahston Mass.
Re: Throttle Body Air Foil (Nathan Plemons)
I bought one back when I first got the car, and gave it away 6 months later.. It was the cheap plastic type that didn't go into your TB.
Now, my new TB came with one, so I'll leave it there :yesnod:
Now, my new TB came with one, so I'll leave it there :yesnod:
Pro
Joined: Mar 1999
Posts: 678
Likes: 0
From: Oslo, Norway
Re: Throttle Body Air Foil (Defender)
Hi.
To understand why the airfoil should help you have to look at the whole air induction chain from the air filter to the heads. The air foil makes less turbulens in the intake and to have hp and torque gains that place of the throttlebody without airfoil must be the place of air obstruction. If you then put in an airfoil the throttlebody manage to flow more air and you will gain some power . If you change to a larger throttlebody you most prbably will gain more.
What they say about gains are true,but there is this "but". The throttlebody has to be the weakest point of the air induction chain to get the full gain.
You will most probably gain something in throttleresponse in a stock car. I thought the 96 had a quite good air induction system. The price for it is high.
The snap on type can during time be misplaced so if you buy one have the bolt on type. Anyhow you will not get the seat of the pants feeling, but making the airflow somewhat better.
I have one myself.
Jan-Erik
To understand why the airfoil should help you have to look at the whole air induction chain from the air filter to the heads. The air foil makes less turbulens in the intake and to have hp and torque gains that place of the throttlebody without airfoil must be the place of air obstruction. If you then put in an airfoil the throttlebody manage to flow more air and you will gain some power . If you change to a larger throttlebody you most prbably will gain more.
What they say about gains are true,but there is this "but". The throttlebody has to be the weakest point of the air induction chain to get the full gain.
You will most probably gain something in throttleresponse in a stock car. I thought the 96 had a quite good air induction system. The price for it is high.
The snap on type can during time be misplaced so if you buy one have the bolt on type. Anyhow you will not get the seat of the pants feeling, but making the airflow somewhat better.
I have one myself.
Jan-Erik
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Burning Brakes
Joined: Jun 2002
Posts: 1,159
Likes: 0
From: royal palm beach florida
Re: Throttle Body Air Foil (LT-4 CE)
I wouldn't buy one today after hearing all the comments about them and the lack of HP gain. That said I do have one, but paid very little for it.
Intuitively, I still think it may help in the higher RPMS, but nothing to back that up.
Intuitively, I still think it may help in the higher RPMS, but nothing to back that up.
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Re: Throttle Body Air Foil (Defender)
Buy a air foil that bolts in place like the TPIS air foil. A few years ago GM high performance did a test on a 1994 Z-28 Camaro that was all stock. in stock form the car put down 240 ish RWHP with the addition of the air foil the car picked up 7 RWHP at higher RPM. It may be hard if not impossible to feels 7 RWHP when it builds gradually as the RPM rise but never the less the air foil did work well. Seven RWHP for 50 dollars is a bargan.
[Modified by bjankuski, 9:48 PM 4/11/2004]
[Modified by bjankuski, 9:48 PM 4/11/2004]
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: Throttle Body Air Foil (bjankuski)
.... A few years ago GM high performance did a test on a 1994 Z-28 Camaro that was all stock. in stock form the car put down 240 ish RWHP with the addition of the air foil the car picked up 7 RWHP at higher RPM. It may be hard if not impossible to feels 7 RWHP when it builds gradually as the RPM rise but never the less the air foil did work well. Seven RWHP for 50 dollars is a bargan.
http://forums.corvetteforum.com/zerothread?id=646673
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Re: Throttle Body Air Foil (bjankuski)
Buy a air foil that bolts in place like the TPIS air foil. A few years ago GM high performance did a test on a 1994 Z-28 Camaro that was all stock. in stock form the car put down 240 ish RWHP with the addition of the air foil the car picked up 7 RWHP at higher RPM. It may be hard if not impossible to feels 7 RWHP when it builds gradually as the RPM rise but never the less the air foil did work well. Seven RWHP for 50 dollars is a bargan.
[Modified by bjankuski, 9:48 PM 4/11/2004]
[Modified by bjankuski, 9:48 PM 4/11/2004]
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:jester
Burning Brakes
Joined: Jul 2002
Posts: 871
Likes: 0
From: Costa Mesa CA
Re: Throttle Body Air Foil (Defender)
Yeah, what's really funny is that common sense says it should work...until you look at the two barn-doors right behind the TB openings in the plenum. Those were the first things I ground away. I still left the airfoil off when I put the 52mm TB on though.
BIG JIM
BIG JIM
6th Gear
Joined: Apr 2004
Posts: 6
Likes: 0
From: Houston TX
Re: Throttle Body Air Foil (BIG JIM 54)
I'm only a novice, but I know that more air in, and more air out means more hp. I never could determine how an airfoil adds more air, so I figured it's not for me.
