90mm throttle body's
 

tpis is now building 90mm throttle bodys for the fast intake,they are doing a run of c5's now and about 10 are allready spoken for,f body tb's to follow.it was not a big deal to build they were allready making the big oval if you are interested in a throttl body call them so they can do a large enough run.

ps. the word is is that fast is not going to ever offer a c5 90mm version,their engineers said it wouldnt work?

please move to "external engine" and then tell us the cost :)

are they still a sponsor on this board?? I know they use to be, but i havent seen their link lately. Also may want to try posting this in the External Engine forum.

how much will these cost?

cost is $650 plus core

core? so they are boring the stock TB out and making it 90mm?????

there is a picture on there website.

http://tpis.com/art/90mm.jpg

it is not possible to port the stock piece out to a 90mm.

they can not source the parts, so they need the core for the spring pack, and the lever. they said they are trying to get the parts, but can not get them at this time.

...and the motor and the gears and housing. That was always the problem for TBW C5 tb's. My guess is that FAST, for warranty and maybe liability reasons, doesn't want to use used parts from a core TB, and buying a new one is costly just to get the necessary parts. Getting the OEM TB vendor(s) to sell the drive parts to the aftermarker is probably a HUGE task.

A thought: With TBW, the PCM expects a certain amount of airflow per degree of blade opening around and just off idle. With about 44% more area, and even 20% more circumference, my guess is that idle and part throttle operation will be tricky (at best). Is it possible to modify the code in the PCM for the pedal-to-TB interface? My guess is that is fairly well protected.

Even ported stock C5 TBs can have an idle speed problem, which can be annoying on an A4. Fortunately mine is A4-specific porting and drives just like stock. Of course it's not a 90!

My $.02

Holy shit! Never thought of that!!!!!! I hope thats not a HUGE problem. :bang:

Since LG has a C5 90mm that is working, I'm going to go out on a limb and say that it is possible. A shame FAST can't figure out how to make one. I'm guessing quite a few Vette owners would have been willing to spend the money on this. Oh well at least they can get one from Lou.

$650 damn that sure is expensive. Plus the picture couldnt be for the 90mm fast intake. The fast intake has a different bolt pattern then that.

ahhhh......got it :)

the throttle body pictured is for the fast intake there is one hole underneth and the 5th hole connot be used on a c5 because of the throttle motor.

correction-- all 5 holes are used, the one behind the motor is bolted from the backside.