I know you hear this all the time but I need help

I am getting mixed answerd and I hope you can help me out.

I have a 92 305TPI z28, I got some engine damage so I figured I would put a 350 ion thier. I liked the ZZ4.

I was told it would work. I have TPI.. someone this weekend is saying he heard they are not running right in TPI. I would like to know your expertise on this. I need to figure something out.

Also if you would recomend what you think I should do. or what would be best. I am going to be driving this car on the street it is not a racecar.

 

Go for it!! It will work, however you might need a custom prom. Note I said "custom" prom, not a hypertech or anything like that.

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'88 IROC TPI 355, '69 truck 4-bolt, fully balanced, 9.75:1 compression, fully ported '70 truck heads(for now), Harland Sharp 1.6 Roller Rockers, Comp Cams CS 252AH-12, ported '86 TPI converted to speed density, Crane AFPR, Flowmaster 3in. exhaust, Edelbrock TES headers, all emissions equipment is still intact, plan on burning my own chips, many more mods and parts on the way as time and money permits =(
Best E.T. with TBI 305: 16.11 @ 82mph
Haven't been to track with new motor
If you have any questions on converting from TBI to TPI email me at jdkchevy70@yahoo.com
In memory of Dale Earnhardt, I'll miss cheering for that black #3 on raceday!!!

 

yea? you know someone that has done this?
I know about the custom chip, but someone told me this weekend they heard it wasnt wroing right in TPI

 

There's several people on this board that've done this. Whoever told you that has no idea what they're talking about. There's a lot of fine tuning required but most of it is taken care of in the prom.

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'88 IROC TPI 355, '69 truck 4-bolt, fully balanced, 9.75:1 compression, fully ported '70 truck heads(for now), Harland Sharp 1.6 Roller Rockers, Comp Cams CS 252AH-12, ported '86 TPI converted to speed density, Crane AFPR, Flowmaster 3in. exhaust, Edelbrock TES headers, all emissions equipment is still intact, plan on burning my own chips, many more mods and parts on the way as time and money permits =(
Best E.T. with TBI 305: 16.11 @ 82mph
Haven't been to track with new motor
If you have any questions on converting from TBI to TPI email me at jdkchevy70@yahoo.com
In memory of Dale Earnhardt, I'll miss cheering for that black #3 on raceday!!!

 

The ZZ4 does not have exhaust cross-over passages in the heads that your 305 uses for the EGR. You'll either have to plumb a line from the exhaust manifold/header to the intake, or PROM the EGR out. If you have to pass an emissions test that checks for NOX, the 2nd option isn't.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" Hedders, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny. Daily driver while Camaro was being put together.

 

My ZZ4TPI with no egr passed Florida emissions when we had it. She did have
dual cats at the time to clean things up.
TPI vettes took hot gases from the #8 header tube to the egr on the back of the intake.

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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!