can someone please tell me the exact differences between a type R and gsr/ls tb?
I just got one from someone who told me it was a new type r tb and it doesn't have the connections for the air control valve at the bottom of the tb. i have a skunk2 manifold and was wondering if I can just put the type R on there. the inner diam of it is 67mm if that helps. and there is no evap nipple on there either

thanks


[Modified by GruvyTune, 6:22 PM 8/7/2002]

 

Outer Diameter 66mm. Inner is 62mm.

 

anyway, forgetting the sizes, what do you do with the fact that the gsr has a nipple for the evap on top and the
IAC on the bottom of the tb? Does the itr tb not need the iac? do i just bypass it?

 

thats not an IAC, thats the fast idle valve.
you dont need that.

 

steve, I thought the fast idle valve is the one on the back of the manifold.

so, you are saying that if I substitute the type R tb for the gsr, just forget the valve thats on the gsr manifold? also, what about the nipple for the evap canister? do I just tap off another vacuum line for that?

 

The valve on the back on the manifold is the IACV - that you DO need.
The valve underneath the TB is the FITV - that you DON'T need. With the stock setup on a GSR, coolant runs through the FITV to the IACV - none of these coolant lines are necessary, (unless you live where it hits EXTREME cold temperatures), if you don't feel like hooking them back up. So, if you're referring to the coolant lines when you speak of "bypassing" something, then sure, you can bypass them both if you wish. But you can't bypass the wiring. You WILL need to have the IACV sensor plugged into the IACV for the car to idle properly. The FITV does not have a sensor hooked into it - it is a wholly mechanical device.

On the nipple, I'd have to look in the manual for that one, but it's @ the shop so I can't help you there.

 

From your sig it looks like your turbo, so you rarely see a negative pressure in front of the throttle body anyways, so your evap system is not even operational as it is before you put on the new throttle body. It needs a negative pressure in front of the throttle plate to actually pull the fuel vapors into the mixture from the canister.