dirt track racer 81

iTrader: (39)

So will a 85mm throttle body fit on a ls1/ls6 intake? currently i have a ls1 intake on my truck with the stock throttle body and plan on goin to the ls6 after the 1st of the year..and i was just goin to see if it would be worth going to the 85mm throttle body.i can get them for under 200 dollars where i work..

sciff5

iTrader: (1)

If you meen the professional products 85mm TB then I want to know the same thing

ninetres

iTrader: (35)

BUMP. I thought I read in another thread that there is a plate that goes between the TB and the LS6 that funnels back to 75mm.

That seems kinda pointless to me. Is it possible to portmatch the LS6 mani to some extent? Anyone run one of the 85mm with an LS6 and care to help me out with some explanation?

2QUICK4U -WS6

iTrader: (2)

THE 85MM THROTTLE BODY DOES NEED A PLATE BETWEEN THE THROTTLE BODY AND INTAKE BECAUSE THE THROTTLE PLATE WILL HIT THE INTAKE OPENING WHILE TRYING TO OPEN FULLY. THE PLATE IS ABOUT A 1/2" WIDE.

ninetres

iTrader: (35)

Seems like there would be no gain since it still bottle necks.

Johnny_V

You need to have the LS1 intakes, TB opening, bored/ported to 85mm to work well with a 85mm TB. Do not use a reducing plate, as it will hurt performance, by causing a bottleneck restiction. The LS6 intake flows better than the LS1/LS2. I would go with that one instead of the LS1.

Rob@EFIAlchemy

iTrader: (9)

has anybody ever tried boring out the opeing on a ls1/ls6 intake to 85 or is there not enough material