1BAD89

i am trying to think of a solid set up to run on my 350 tpi and i was thinking about slp runner afr 195cc heads a bigger cam (didnt think on how big yet) and some 20hr injectors and a 58mm throttle body. and i really dont know what tune to run if someone could help me with that it would be appreshated. so would that make power or do i have it all goofed up. im pretty new to tpi motors so any help would help alot

vetteoz

iTrader: (13)

24lb injectors and put the $$$ from the 58mm TB into the cam.
TB not needed on 350 TPI

1BAD89

what size cam would be good for that set up?

BigWhiteGTP

If I were you, I'd port the lower manifold, or just get hi flow instead of the runners if money is an issue. Later on, you can just simply swap out runners. Whereas, it would be a bigger hassle to swap out the base manifold.

I would also look into getting a 3000-3300 stall converter.

Blackdog36

iTrader: (3)

Hi 1bad89, i've been researching on upgrading my 350 as well. I can't decide if 180's or 195's would be best. From what I can gather 195's might be too big for a 350 unless it is a high rever with holleystealth ram intake. 180's have very similar flow numbers compared to 195's. 195's start to flow more at very high lifts. 180's would produce lots of torque with smaller chamber and be good fit for a strong 350 TPI setup. Supposively port velocity between the two is similar but the 180's have a great exhaust to intake ratio. I would go with 180's. They still flow like crazy! Check out this link https://www.thirdgen.org/forums/tpi/...195-heads.html

Fuel injector size is determined upon engine horsepower (see link bottom of page) http://www.rceng.com/technical.aspx
Using 380 HP requires 30lb injectors. I forget how much stock 48mm and 52mm throttle bodies flow but 58 is overkill even on most 383's.

I've read some good things about Comp Cam XFI 268 Hydraulic roller camshaft. It has very aggressive lift characteristics and yields good lower end and mid power. Also with lobe seperation of 113 degress it is good for tuning. Anything less than 112 I believe is hard to tune for a TPI engine. A few guys here have it on 350's and are making around 400hp. Any more intake duration than 268 degrees I think lowers vacumn pressure and affects power brakes, etc (that's what gives you choppy idle). http://www.jegs.com/i/Comp-Cams/249/12-466-8/10002/-1

Once you figure your build out, I would speak with a few stall converter manufacturers to see what they recommend. You will also need to build up transmission and rear end for that much power. Either way you go, your 350 will be a mean street machine!

1BAD89

i really straid from going with the motor i have now since i have a 350 with a decent setup already so im going to convert that carb setup on that 350 to my tpi i have now cause my motor has 160k and i dont need to spend the money on rebuilding that one if i have a good 400hp motor sitting around. thanks for your input though.