Supercharging 91 Z28?

ILOVEGINA
06-14-2006, 11:26 AM
i am looking into supercharging my 91 z28 tpi. is it anygood? would it give me alot of ponies or is it just a dud? does it work well with the tpi setup? please let me know because i don't want to drop 3 grand on somethin that wont give me substancial power and torque increases. thanks

Rice Killer87
06-14-2006, 11:54 AM
Force feeding the TPI is the best way to get it to turn some RPM's.

Ive never had a S/C TPI but ive heard it runs well.

Tex95Z
06-14-2006, 12:25 PM
LoL @ your screen name

Supercharging would be a great idea

mako350Z28
06-14-2006, 07:35 PM
TPI setups take very well to boost, just don't overdo it. You don't want to spend 3 grand on a supercharger and then have to shell out for a new engine. At most the engine will safely handle about 8 lbs of boost. But even then be on the lookout for detonation. That will ruin your little project very quickly.

But from what I have seen 8 lbs will give you roughly about another 100 ft-lbs and another 200 horses.

ILOVEGINA
06-14-2006, 11:08 PM
Thats the name of the car

ILOVEGINA
06-14-2006, 11:10 PM
so is it safe to run 8lbs of boost in a stock tpi setup? i only have a cam in it.

89Vert
06-15-2006, 12:57 AM
I wouldn't run 8psi on a TPI

iron heads for 1 too much effective compression ration,

I run 8psi on a 95 LT1 camaro and it killed the stock bottom end, car only had 80,000km and ran boost about 10,000km

5 psi would be more reasonable

BrandonKeith
06-15-2006, 01:31 AM
That's because the Powdered Metal Rods in a Stock LT-1 aren't really all that great. The first 2 years of the LT-1 had Forged Rods and then GM went to the Powdered Metal Rods for 95 because they were cheaper to make. I had one in my N/A stock motor snap in 2 places while cruise'n at 75mph on the highway. Also my motor had just turned over to 58k miles. There was a slight lean issue in that cylinder.

So, his rods should be up to the job and hold out just fine.

89Vert
06-15-2006, 10:08 AM
killed the bottom end due to excessive bearing clearance,
causing low oil pressure

mako350Z28
06-15-2006, 03:10 PM
L98's have less compression than an LT1. And you can do it but you have to be careful of detonation b/c of the increased heat from the iron heads. Most people run 6 lbs.

ILOVEGINA
06-15-2006, 10:41 PM
thank you! you guys are awsome! so for heads then, any ideas??

89Vert
06-15-2006, 11:11 PM
Aluminum would be best, can handle higher compression with out detonation

blkzdrgn
06-16-2006, 01:54 AM
ITS FUNNY THAT I CAME ACROSS THIS SUBJECT... WELL I CURRENTLY HAVE A 91 Z28 WITH A PROCHAGER SUPERCHAGER ON AND I WILL TELL YOU ALL THE IN'S AND OUTS IF YOU LIKE,
IAM A LITTLE TO NEW THIS POSTING REPLIES AND STUFF AND PLUS IAM NOT ALWAYS ONLINE SO IF YOU LIKE YOU CAN REACH ME ON MY REGULAR EMAIL IF I DON'T IT HERE IN TIME
BLKZDRGN@HOTMAIL.COM

ILOVEGINA
06-18-2006, 10:36 PM
now my next question is what alum heads should i get?

Rice Killer87
06-19-2006, 11:28 AM
GM Fast Burn.