Justin3093

I am using 350 injectors on my stock TBI unit on a 350 Engine. Would it be better to use a Holley 670 unit? Im pushing over 300 hp. Will it bolt right on to my 92 camaro?
Any help is appreciated. Thanks guys

steve8586iroc

Yes it will bolt on and no it won't work. The stock intake only has 1 11/16" holes in it and the 670 has 2" bores, so you will need a new intake with 2" holes or use a fourbarrel intake and a tbi adapter plate. This is realy the best combo to use for serious hp. Check out the thread at the top and you'll see what I mean.

Steve

1989camarorsrs

iTrader: (-1)

where can u buy the tbi adapter plate with the 2 inch bores.

Justin3093

thanks steve...ill go take a look.
where would i find one of those adapter plates?

streetrunner

I have seen them on the Holley.com website. Turbo City might have them as well. Turbocity.com Justin3093 did u get the stroker kit to make a 305 a 335? What other mods have you done as well. Im thinking about that stroker kit and Vortec heads with a 220 degree .500 lift cam and full exhaust system.

streetrunner

sry man i was thinking about something else when i typed that...
but holley.com has them and the 670 CFM throttle body

steve8586iroc

Try looking at this thread it might help. https://www.thirdgen.org/techbb2/sho...threadid=86352

Audiman

I believe holley part # 17-46 is the one you need. The TBI unit is 670 cfm as opposed to the stock 480 cfm and even with the adapter it will run much better. I know a guy with a 383 with an adapter plate and he said it was the biggest gain besides his cam. Did you get it running yet, hows it work for ya?