Hi Everyone,
Can any c4 enthusist tell me what size throttle body came stock on the 1986 corvette tpi motor?
And also if i goto after market say like bbk 52mm will i need to do a lot
of adjusting or is it just a bolt on job and go ?

I would say it should bolt on and go just fine. You will get alot more HP if you have changed the intake, cam, heads, etc. But that will require custom computer tuning.

I read in one C4 mag that the L/98 flow limitations (intake vs. exhaust) are the intake; specifically, the
intake manifold. I did no flo mods on my 87; this is just from reading...