1G 90/91+ throttle body differences

[Blam]

I read ALL 20-some pages on a search for key word "throttle" so dont say I didnt try

turbo and N/T are the same.

1990
- the odd year
- larger TPS
- ISC with extended harness
- nipples are different

91-94 are all the same.

a 90 CANNOT be put on a 91-94.
a 91-94 CAN be put on a 90 but has to use 90 sensors (I think I am wrong here)

91-94 can be put on 2g dsms with slight modding
http://www.roadraceengineering.com/2gtbswap.htm


where am I wrong?

or can a 90 use 91-94 with ANY sensors?

 

[mitch83]

from what I understand 90 TB is sensor specific so you have to use 90 model sensors and really isnt worth it I also have read that the 90 isnt 58-60mm its smaller so. the 91-94 are the good ones and can use the 95etc sensors. I have a 91-94 on my car and used all the 2G sensors.
mitch

 

[Blam]

I just measured my 90 TB. it reads a solid 60mm

 

[Blam]

TPS on the 91-94 is the same.
95+ has to be used on whatever TB you have.
91-94 TPS cannot be used on a 90
91-98 ISC can all be interchanged
only 90 ISC will work with a 90?

someone else has to know this stuff

correct me if I am wrong anywhere

 

[Blam]

does anyon eknow if a 91-94 TB will fit a 90?

do you have to use the 90 TPS? and the 91-94 ICS will work?

 

[stangtt]

I just want to add that the N/A and Turbo TB's arent the same. 91-94 are 60mm, but do not use the 4 bolts to attach the upper IC pipe. You would need a 2-1/2" coupler. They also do not have the butterfly shaft seals.