Thread: Make A 4" Fenderwell Intake (FWI)[*]

Originally Posted by nickbuol

Actually 03GTPLE is correct.

I did the fender well intake on my (now dead and gone) 2000 GTP. All that putting it in the fender did for a supercharged engine was cause the filter to get dirty REALLY fast. It has been a topic of discussion quite a bit actually, and after cleaning the filter a lot, I did some research on it and for a supercharged engine, it really doesn't make any noticeable difference because like mentioned before, the supercharger warms the air up so much that it most certainly is quite warm (hot) by the time it is shoved down the throat of the engine so to speak. I took the same filter and the same massive intake pipe, cut it short and was getting the same performance. Sure, maybe with some testing equipment the FWI may give an 1/8 HP of improved performance, but that is about it. It certainly felt the exact same, and then I didn't have to clean the darn filter so stinking much.

Now, a naturally aspirated engine is a different story. Any drops in the temp of the incoming air and you should see/feel an improvement.

Do a little research yourself and you will see what we are talking about and be better educated the next time the topic comes up.

Someone did a more scientific test back in 2010 and determined that the "HAI" was actually better than a regular CAI (Thrasher). A good number of highly respected people in the Grand Prix mod circles agreed with the findings.

http://www.grandprixforums.net/dyno-...ake-33225.html

Now you know.

ok so now i need you to examine some things and educate youreself better before you go off saying stuff you have no clue about. If you look at the dyno comparison you would notice that the cold air box test is running 1 point richer in AFR which is on the rich side vs the open cone test humidity was also down 13% for the open intake test even though ambien temp was up 8 degrees this dyno test is not conclusive at all with the variables being like that between them if the AFR and other variables where closer or commanded the same then i could bite what the "shootout" between the two intakes.
Now if you need me to break down L67's AFR under boost it shouldnt be near 10 at all thats rich as hell. between 11 and 12 is the sweet spot.

so as far as IAT tables goes heres what stock reads for a stock L67




NOTICE as the hotter the IAT read the lower the timing no biggie sure but youre driving around at or above 100 degree intake temps youll start losing timing and im fully aware of the supercharger heating air which is also accounted for in other tables. I h am also the previous owner of a GTP so i know that part. So back to my original point Hot IAT's--Reduction in timing period. So now please educate youreself before you go nuts winging off
another thread thats not even conclusive.





For anybody wondering about LS4's while were on the topic theres also multiplier tables of this