flip129

iTrader: (1)

What is the biggest size throttle body you can use on a Ls1 car intake
Its 75mm stock, has anyone bored out theirs and put a 85mm TB
Or can it accept a 85mm TB
Any response will be appreciated

MonmouthCtyLS7

iTrader: (6)

Think they make 102 mm 4 bolt design but depending on mods more then likely you wont
need anymore then a 80/85 mm.

Majestic9C1

iTrader: (19)

I had an 85mm throttle body with an adapter to neck it down to the stock LS1 manifold size.

lucasmccane

i am having the same issue the ls1 intake has a 3 bolt pattern and the ls2 has the 4 bolt. i bought the fast 102 so i now have the 4 bolt pattern, problem solved right - wrong! now i am looking for a T/B that will connect (elecrtically) to my harness. GM changed alot of elect. on the ls2's and i have a LQ4 or "LS1 cousin" so the Nick Williams 102 T/B and the 90mm LS2 T/B are outfitted with different connectors. i am really considering getting rid of the FAST 102. i just dont want to mess with it anymore! i have heard that like the 1st replier said: you just dont need that much anyway! PS. my T/B is drive by wire, and id like to keep it that way THATs the main problem.

Fry_

OP, just have your stock TB ported.
lucasmccane, this should solve you problem.
http://www.summitracing.com/parts/ce...FcHm7AodrSUACQ
It took me at least 38 seconds to find that with google, so I can see why you wouldn't want to mess with it any more.

flip129

iTrader: (1)

I have the ls1 3 bolt intake what is the biggest i can put on that?

Fry_

seriously

flip129

iTrader: (1)

I did numb nuts why do you think im here asking. Seriously