FAST Throttle Body
07-07-2013, 02:58 PM
#1
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FAST Throttle Body Im going to run the FAST truck style 102mm manifold and the fast 102mm throttle body. I am looking at the Big Mouth version and they have the normal Big mouth and the Big mouth with TPS. What is the difference and the advantages/disadvantages of each?
07-10-2013, 08:44 AM
#4
I'd do the FAST over the NW in the 102.
102s have low-speed problems due to the amount of air they let in. You can tune around it for low-speed driving and idle, but the problem is the amount of air goes from nothing to a lot very quickly with just a very small amount of throttle. That fine tuning is very tough to get perfect. But that's why when you crack the throttle... it's damn near instantaneous throttle response.
FAST actually created an area of turbulence at the bottom of the TB that slows the air down when the blade is partially cracked. This allows for fine tunability of low speed and idle air characteristics.
That will save you or your tuner a lot of time on the tune and ultimately make the car behave much more like stock with the added bonus of excellent tip-in throttle response.
Here is a pic of it on my FAST TB.
102s have low-speed problems due to the amount of air they let in. You can tune around it for low-speed driving and idle, but the problem is the amount of air goes from nothing to a lot very quickly with just a very small amount of throttle. That fine tuning is very tough to get perfect. But that's why when you crack the throttle... it's damn near instantaneous throttle response.
FAST actually created an area of turbulence at the bottom of the TB that slows the air down when the blade is partially cracked. This allows for fine tunability of low speed and idle air characteristics.
That will save you or your tuner a lot of time on the tune and ultimately make the car behave much more like stock with the added bonus of excellent tip-in throttle response.
Here is a pic of it on my FAST TB.
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07-11-2013, 10:48 AM
#11
in addition to not having the "speed bumps", the nw tb's also leak (substantially) through the throttle blade roller bearings that may or may not cause you some additional tuning issues to the ones typically associated with a 102.
get the fast.
BTW - "TPS" = throttle position sensor. If you still have the one from your stock tb then you can reuse it on the fast, drops right in. if you sold or misplaced it then you need a new one.
get the fast.
BTW - "TPS" = throttle position sensor. If you still have the one from your stock tb then you can reuse it on the fast, drops right in. if you sold or misplaced it then you need a new one.
Last edited by ckpitt55; 07-11-2013 at 10:56 AM.
07-11-2013, 12:15 PM
#13
Staging Lane
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And Jake I'm with you I am doing all I can to research every part that Im thinking of buying ahead of time so Im not dissappointed in the long run. How much did the LS6 heads help you out on your build?
07-11-2013, 01:23 PM
#14
The older fast tbs were the ones people had trouble with
A buddy of mine has one on his car and its been a huge pain in the *** tuning it
I dont think the newer ones have the same problems
A buddy of mine has one on his car and its been a huge pain in the *** tuning it
I dont think the newer ones have the same problems
07-11-2013, 11:21 PM
#19
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Get the the FAST TB. We didn't have hardly any trouble with mine when we started tuning it. we shall see how the fine tuning goes next week for the finishing touches.
