fusion_ta66

iTrader: (1)

I know that 102mm TBs fit on a 102mm intake. But I have read that they are harder to tune and driveability suffers. I know for a fact that the FAST 92 TB fits, and the NW and PTM do not. This is a pic of a NW92 on a 102 intake:




Any comments are appreciated.

thanks

99Bluz28

iTrader: (35)

FYI, you could run a CBM billet 92mm to 102mm TB adapter an run any 92 TB you want.
http://store.custombuiltmotors.com/e...y-adapter.html

I believe Accufab has a line of TBs (90,95,105mm)designed just to work with the FAST 102 intake manifold.

cali_bear2003

iTrader: (7)

Has anyone tried any of the cheaper prices adapters available on EBay?

fusion_ta66

iTrader: (1)

Didn't know about that 92 to 102 adapter, good info. I couldn't find anything that said the accufab TBs all fit the 102 manifold

dr_whigham

iTrader: (49)

That still looks sealed though. I'd run it. I wouldn't trade a NW TB for anything.

redbird555

iTrader: (14)

The ebay tbs fit iirc but why? Dont believe everything you read. You will have a harder time tuning a fast 92 than a nw or ptm 102. The brand is far more important than the size. I fought for weeks trying to get my fast 92 idling and driving correctly. The iac port on fasts and ebay tb's is way too small and limits airflow. This often results in cold starts and bad low speed driveability. The ptm is basically a pop off of an nw so that would work fine as well in a 102 version.

The solution is to drill or open the blade slightly to get the car to start without the gas pedal but then at warm idle the iac has to close all the way to compensate for the blade so again you have bad driveability.

My nw 102 was tuned and driving 100% better than my fast ever did in a little over 3 hours. I now have a nw 92 on my ls3 setup and it drives the same, the 102 has a more touchy throttle response because of its size but thats it other than that they drove the same. A good tuner should have it nailed down pretty quick.

If you put the 92 on the 102 you will also get issues from having that "step" in the intake in which case you will need a vmax ring to change the hole opening from a 102 to a 92mm more money thats not needed.

FWIW: I dynoed my fast 92 tb on my 102 intake then swapped the tb to a 102 nw and went back to the dyno. Same dyno in similar weather conditions, I not only got rid of all my startup and driveability issues but I also gained 7whp with that being the only change.