FAST Throttle Body
Thread Starter
Staging Lane
Joined: Jul 2013
Posts: 68
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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?
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.
In the past the fast 102 TB were giving tuners problems, idk how but I remember a bunch of threads for it to stick to my memory..
I think any good tuner should be able to account for this regardless
I think any good tuner should be able to account for this regardless
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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; Jul 11, 2013 at 10:56 AM.
Thread Starter
Staging Lane
Joined: Jul 2013
Posts: 68
Likes: 0
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?
