brick12

hello I have a 91 Z28 auto that I am fully redoing and I want to put a new 350 crate motor in it. i just need to know what is the best motor to buy and what other things I will need to buy to complete the swap

Tuned Performance

iTrader: (92)

You should search threads and determine your budget .
High hp= more $$ for parts that will break trans, rearend. Adding
Sub frame connecters.

brick12

I have read quite a few threads on here but I am wondering if the TPI set up changes anything. the majority of the swaps I found aren't TPI and I was hoping to see what crate motor everyone thinks is the best without breaking the bank.

Tuned Performance

iTrader: (92)

Staying with Tpi will require tuning. You can do this yourself, hire a tuner or get a aftermarket ecu dynamic efi ebl p4 etc..
Any changes should be retuned cam change /heads ...
Larger injectors depending on ho range.
You can always upgrade the tpi base runners , go hsr.
You should make your decisions on what you want power wise /torque range and budget.
You can go cheap and still a upgrade but not super .
Example a new gm crate Tbi 2 bolt main engine $1800-2k.
Bosh 3 22#hr injectors and have your ecm reprogrammed.
This would be a 200hp 350 not real great but it's new drop in and little mods to make it work.
You could step up to a vortec 350 , more ecm tuning would be required.
Cost is more for the intake, long block but 300hp would be acheavable.
Add a cam , headers.
Stroker 383 ! List goes on and on ......

brick12

I plan on staying under 3 grand I'm not trying to make a huge amount of horsepower just would like to have more than the 305. do you think it would be best to stay with TPI system or go another route? I really just need the most reliable setup so that I can take it out and on decent size cruises and not worry about issues with it

Tuned Performance

iTrader: (92)

http://www.jegs.com/i/Chevrolet-Perf...0282K1/10002/-
http://sdparts.com/i-23896057-sdpc-s...baseplate.html
https://www.southbayfuelinjectors.co...-d3-5-7-tpi-gm
I personally like efi for reliability, good power

brick12

what would be needed to change to a efi system?

Tuned Performance

iTrader: (92)

The memcal chip needs to reprogrammed , the 305 knock sensor should be reused it will not be the most accurate.
If it's a auto you could use a memcal labeled Anjf or aujp and a 350 ks.
Although these memcals are getting hard to come bye.

brick12

ok appreciate your help i will hopefully get it all done here shortly

Tuned Performance

iTrader: (92)

There are a ton of other ways to go just do some reading research.

five7kid

iTrader: (14)

Getting it done for $3k is going to be a tall order.

One option is to get a 350 shortblock and put all of your 305 stuff on it. One option is something like this from GM:
http://www.jegs.com/i/Chevrolet-Perf...61723/10002/-1

You'll put your heads, cam, lifters, sensors, accessories, and TPI stuff on it. You'll need new head gaskets (and probably other top-end gaskets). A new timing set is usually recommended as well.

Which exhaust system do you have, single or dual cat? The single system is lame, and will really hurt power on a 350 (it hurts the 305, in fact). If you have dual cats, you're good to go.

It would be best with larger injectors (although it will get by with the 19 lb in most situations). And a 350 tune since '91 is a speed density system.

clubber

iTrader: (1)

I'm just going to state what all the others are eluding to. Whatever you get, budget at least 1K more money to get it in and running. It could be even more if you have to change manifolds like the Vortec option stated above.