Cascade Crew

simpson6716 · Posted: Wed Oct 13, 2010 8:45 pm Post subject: 327 TPI

OK, I have an 85 Z that has a 305 TPI and I just recently got a great deal on a 327. Would the 305 TPI work with the 327? And would I have to get bigger injectors and a different ECM? The 327 came out of a 66 Corvette and it is .30 over with a large cam and fresh heads. Anything that I might be missing or would this be a good swap for the TPI?

aaron_sK · Posted: Wed Oct 13, 2010 8:48 pm Post subject: Re: 327 TPI

Twilightoptics · Posted: Wed Oct 13, 2010 9:22 pm Post subject:

Definitely airflow.

What compression and what's a 'big cam'

A mostly stock 327 would be alright with a MAF setup and a small bump in fuel pressure.

A modded 327 MIGHT be SEMI okay with a 350 tune.

Big cam? Forget about it without tuning yourself.

End answer, yes it can all be done.

BTW 327 = high rev
TPI = 4200max rpm for power.

aaron_sK · Posted: Wed Oct 13, 2010 9:30 pm Post subject:

For what it's worth I would sell the TPI intake and find a nice Stealthram (if you want EFI), or just swap a carb.

TPI will just choke your chicken... Squint

91RSVert · Posted: Thu Oct 14, 2010 4:13 am Post subject:

I would say it would require different injectors, and tune w/o a doubt.

While I agree with the stealth ram, or do a LTx intake. A tpi can be made to breath above 4200, but it takes alot of work that can be done easier by doing the LTx or aftermarket.

But also, if TPI is all you got and can afford now. Drop it in, and start saving to get the intake you want.

iansane · Posted: Thu Oct 14, 2010 6:55 am Post subject:

simpson6716 · Posted: Thu Oct 14, 2010 4:26 pm Post subject:

simpson6716 · Posted: Thu Oct 14, 2010 4:30 pm Post subject:

MrMike98 · Member Joined: 18 May 2010 Posts: 231 Location: Bremerton

i think this is large journal block. maybe exchange to 350 crank.
now u have a lower rpm motor which is much more suitable to TPI.
please note that what ever u do u will HAVE to tune motor by burning custom chips.
please do the homework and put in the parts that will work together to get u want u want.

Mike
"details make all the difference"

RSFreak · Posted: Thu Oct 14, 2010 4:42 pm Post subject:

Swapping to a carb setup isn't very complicated. You would need a vaccuum advance distributor as well as carb intake and a carb obviously and either a mechanical fuel pump or pressure regulator if you stick with the electric pump.

GREG DAVIDSON · Posted: Fri Oct 15, 2010 8:17 pm Post subject:

IROCDave · Posted: Fri Oct 15, 2010 8:51 pm Post subject:

Why run a high rpm small displacement small block? TPI will kill off any fun above 5K on a small engine, which by the way is the only reason to run a small SBC.

For the guys that are listnening to their bench racing grandfathers, dont waste your money on 1st gen SBC stuff. A 327 with 202 camel hump fulie heads was the shizzle in the late 70's / early 80's, it is now just shizzle. I dont care how cheap it is, it's garbage, dollar for dollar compared to what is availible now.

JMHO.

GREG DAVIDSON · Posted: Sat Oct 16, 2010 12:07 pm Post subject:

'92 camaro boss · Posted: Sun Oct 17, 2010 2:30 pm Post subject:

You get plenty bang for the buck listening to your grandfather. when you start with an ls platform of course it's practical to build off of that and of course you'll get alot of power.

Starting with a 327, or in my case, an old 350, its cheaper, and you'll still get good enough power from it. it's personal preference in the end i guess, but a good built sbc will hang right there with all of the LS's.

iansane · Posted: Sun Oct 17, 2010 4:09 pm Post subject:

simpson6716 · Posted: Sun Oct 17, 2010 6:45 pm Post subject:

aaron_sK · Posted: Sun Oct 17, 2010 7:49 pm Post subject:

Quasi-Traction · Posted: Mon Oct 18, 2010 5:31 pm Post subject:

Honestly, I'm with the crowd, It's gonna be too much of a headache to try to run a modified 327 with TPI. If you do end up rolling with the 327, I'd Sell the TPI setup, use the money you make off it to buy yourself a Air-gap, carb and maybe if you got some dough left over, an adjustable FPR and start tuning from there.

You will make better power for less time, expence and trouble than trying to tune a Factory TPI setup on a 327 with what is, supposedly, a "big" cam (as you put it)

Just my humble $.02

iansane · Posted: Mon Oct 18, 2010 7:18 pm Post subject:

*cough*
http://www.firstfuelinjection.com/

Twilightoptics · Posted: Mon Oct 18, 2010 7:48 pm Post subject:

It's still a tuned port design which is great at one rpm but limited from there out.