I have what is a 350 ZZ4 short block with Vortech heads The heads I am having drilled to accept the TPI set up. The car currently has a 305 HO TPI in it. any insight into problems with this. I will also be adding a stall converter, Edelbrock TES headers, roller rockers.

------------------
85 T/A 5.0 H.O.WS6 TPI Auto,3:43 SFC's,STB,K&N Air filter,AFP,8.8 wires. Was my 70 year old Moms car 48000 org miles

 

I am not up to speed on the TPI systems but you MAY need a different chip and bigger injectors if you are using the ones from your 305.

You may want to post this in the TPI forum.

 

I'd say you'll need a different prom most definatly. Maybe bigger injectors, TBs, maybe intake and Plenum, Runners.

 

You're off to a bad start. The TPI manifold ports will not line up with the Vortec ports. Bolt holes are not the problem, so drilling is not the answer.

There was supposed to be a run of TPI manifolds made for Vortecs, but I haven't heard if that came through. Hadn't when last heard before the boards were down. Check the TPI board.

The 19 lb stock 305 TPI injectors will work with the pressure cranked up. Some say don't do it, but a guy out here with a ZZ3 runs better times with 19's than he does with 24's.

------------------
82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 3.08 open, cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress.
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

Damn and here I thought I was onto something funny thing the guy at the engine shop told me he's done it before... Looks like I'll keep the fastburn heads...