Throttle Bodies
#2
Most guys on Tech like the NW of the two. Reason being when FAST came out with the 90mm TB at first it had a defect causing the butterfly to hang at WOT. The NW peice was desinged to eliminate that problem. Supposedly all the new FAST TBs are re-designed and do not have that issue anymore.
#6
TECH Junkie
Joined: Mar 2002
Posts: 3,019
Likes: 1
From: memphis tn
I had FAST throttlebody that had the sticking problems and switched to a UMIracing throttlebody,it has an eliptical opening that offers vastly improved low speed throttle response.UMI is the best way to go if you plan to drive around on the street.


