hey,

ok so i just installed my t/b tonight, noticed a high pitch noise.
now i think i've read this is normal with it because it doesn't have the pin holes like the stock t/b, but i can't remember

get back to me guys

 

Hi
I will share some technical information with you. It is not the throttle body and this is true for the billet and the FRPP unit. The problem is the port match to the upper intake adapter. The adapter is a casting and as such there is variability in the size of the bore. The other issue is in the install. Just do not bolt it on, center it and torque it down gently. The whistle sound will either decrease of go away. Now here is an added tip. If you port match the upper adapter and spend some time cleaning it up you can see a performance reward. Go a step further, port and polish or Extrude-Hone it and you will see a two-fold improvement. Better air flow and reduced temperature. Yes, you will reduce the temperature because you will lose the frictional heating over that nasty cast surface. Now you know why I can make over 400 HP with a 3 generations old chip, my power pipe (92MM) and my throttle body. No pulleys, no magic and stock plugs and it will be three years old in March. I needed to add this too NO SERVICE ever.

 

Thanks Mike,

i'll loosen it up, try to line it up better and gently tighten it down tomorrow

 

Never thought about extrude honing the the intake tube after the T/B.Guess while the truck is waiting for the rear end set up I can send it off.Thanks Stan

 

What are the torque specs for the t/b to the intake? I'm putting mine back on today and I want to get it right the first time. Thanks, Mike

 

does anyone know how to adjust the TPS voltage on a single bore throttle body? the auto tap says my voltage is 1.01
i think its supposed to be .99 or less..
can it be adjusted?

thanks!
brooks

 

TTT

 

I'm on my third(and last ) throttle body on my L. I've never checked the TPS voltage. I've read where the TPS screws are very tough to get loose(on purpose?) and shouldn't need to be loosened. To adjust it, you loosen the screws/bolts and move it slightly up or down--the voltage will change with this movement. The only reason I know this is I use to do it on my 1991 Z281LE--very easy to do once you get those bolts broken loose.

Dan

 

BA,,

Sorry to be dense but could you post a picture of this process including what your are using to hone?

Thanks, Jim