- Feb 6, 2002
- Houston, TX USA
- 2001 C-5 White Convertable Z-51 6SP
I've got a 92 LT1 that is stock except for a K&N air filter with opened up air box and Magnaflow exhaust and my car runs better without the foil than with it.
When I put the foil in I experienced a drop in my throttle response and my fuel mileage dropped also. If you are determined to try using the foil I've got one just like new that screws into the throttle body that I'll sell you for $25.00. Just be sure when you install it that you use high strength thread lock on the screw so it doesn't come out fall into the intake and do damage to your engine. According to some posts this has happened to people who didn't bother to use the thread lock. I'm not saying the foil won't work for you I'm just saying it didn't work for me.
Pure Placebo effect......
I agree with that. I got the same results.I installed one of those airfoils on my '89 because a fellow Vette owner suggested it to me. I didn't feel anything in the seat of my pants except for being lighter by the $ I paid for it. I also added a power coupler which replaced the accordian type which was stock with the smooth one. I also opened up the air intake box, none of these made any difference I could feel. I beleive the only thing they do is smooth out the air flow to the plennum. That may help improve things a little, but not that I could tell. My gas mileage didn't change either. I've also read of guys cutting the screens out of the MAF for more air flow. I haven't done that and personally wouldn't even try. With the open air box, power coupler, and air foil installed my throttle responce did seem smoother, but thats about all I noticed.