82sharkk

Putting a zz5 in my 82 plan on removing the holly carb GM installs and using a full TPI from a vette w/a 383 stroker. Harness upgraded ECM ect. Anyone TPI a ZZ5 or ZZ4 out here? Just want to know what issues I may run across ! Thanks.

cagotzmann

I am looking at the ZZ5 with some sort of EFI, but I need to find something that fits under the stock hood. 1978 Corvette. Have you made the purchase ? The only thing I heard about the ZZ4 / ZZ5 is the alternator housing interferes with the driver side upper control arm. You need to make a new bracket if using the turn key package with the serpentine setup. Most have changed to a Alum Rad with dual fans and remove exisiting shroud. Water pump needs to be changed if using the stock accessories and exisiting fan / shroud.

I would like to also know what to watch out for.

82sharkk

This is the only EFI set up that will fit under the hood as far as I know. I haven't heard anything about the alt getting in the way of the arm, I have the stock accessories but, I'm getting the turn key so I will have all new accessories and serpentine belt. Guess I'll just sell the carb. There is a guy here in Houston that sells TPI set ups for really good prices. I'm pretty sure I have to swap to an electric fan. I was told that the ZZ5 was the only crate that would bolt up to the TPI.

bebezote

what about a mini ram.... like 2" lower than a carb with dropped base cleaner i think

Shark Racer

TPI with a ZZ4 is basically gonna be an L98 with a very mild cam.

82sharkk

It's a zz5 as far as I know the tpi won't bolt up to the ZZ4

82sharkk

I looked at the mini ram to but for the price the tpi is just the best bang for the buck.

bebezote

found my miniram from a member here...for like $750 shipped.... included 2x 58mm TB , fuel rails... just had to buy injectors...

makes a ton more power than an old tpi design...(long runner)..the motor will be flat by 4500rpm...

just saying

bebezote

http://www.carcraft.com/techarticles...e_tpis_zz_450/

82sharkk

It's not a stock tpi set up it's been ported and the ECM tuned bigger injector way to much to list 600, I do like the mini ram too.

qwank

why wouldn't it? ZZ4 uses the same heads that come on an L98 with stock TPI

82sharkk

I'm not sure, I asked but was told it wouldn't bolt up on the ZZ4 only the ZZ5, at any rate I emailed GM to get more info.

diehrd

Of course it will bolt up ... Who ever said it would not is wrong ..

Rotonda

I have a TPI in my 77. I used an L31 crate engine as the base (The L31 was the vortec engine out of 1996-2000 light trucks). It has vortec heads, 4 bolt main, roller cam and 1 piece rear seal. I replaced the cam with a hotter than stock one from Crane and bought a manifold base from Scroggins-Dickey.

Both the manifold base and the vortec heads flow much better than the stock L98 pieces (and the zz4 heads). I finished it off with a chip and harness from Street & Performance, a 52mm throttle body, a ported plenum and larger runners. A Scroggins-Dickey dyno test with these mods produced over 350 HP while keeping the TPI lower end torque.

All told, this combo still cost less than the zz5 and boxed TPI you're talking about.

Shark Racer

As qwank said, the ZZ4 uses the same aluminum heads that the 87-91 Corvette used. Well, 88-91, 87s used an aluminum head with a different casting number. Regardless, they're still the same port and bolt pattern as the old iron heads, which means the ZZ4 will work fine.

As for the new heads on the ZZ5, not a lot of info yet but it sounds like they're the fast-burn heads, which have dual bolt patterns in one of the later iterations. I can't remember whether the port matched the old style intake manifolds better or the Vortec pattern.

Regardless, there are sources out there for TPI intakes on Vortec heads as well. See the Edelbrock 3817:

82sharkk

Ok so after speaking with GM engineer today, it will bolt up to the ZZ5 not the ZZ4 you have to buy a modified set up to fit the ZZ4. I know I could buy an engine and build it my self and I have in the past but it's hard to find one in good shape, then it has to be gone through, machined if necessary parts added for performance and no warranty. So that's why I'm going with a GM engine, was going to go with blue print but I backed out because of the reviews they got on line. My original post still stands if anyone has used a zz5 yet?

diehrd

You could not have talked to a GM engineer who new what you where asking. L98 heads (ZZ4) ........ ( ZZ5 , ZZ383 ) use the same heads.. Called Fast Burns

Just put a TPIS system on a ZZ383 for a 1989 corvette , fit fine and it has the L98 intake bolt pattern. Fast burns are drilled for both vortec intakes and all standard sbc intakes.

Zorro O

Hey Rotonda. I am running the same setup as you except for the cam. What cam are you running?

Zorro

qwank

who ever you talked to is an idiot. The TPI bolts onto a ZZ4 because the ZZ4 uses the exact heads that the TPI came off of.

Just buy this engine for a lot less and call it a day. unless you absolutely want fast burn heads.

http://paceperformance.com/i-5146074...ck-engine.html

682XLR8

I looked up the fast burn heads for the ZZ5, PN# 19300955

http://www.gmpartsdirect.com/results...umber=19300955

Note that this head has the 210cc raised roof ports. The stock TPI manifold (all Corvette, 85-86 Camaro/Firebird) will bolt on, but I don't think it will cover the intake port, at least in my case it didn't. Here's a pic of a '90 TPI manifold and Brodix IK200 heads on my 383 which have the raised ports as well....yeah I found out the hard way





The Vortec manifold that sharkracer posted may work on the fast burns, but I can't say for certain. Check for used Miniram intakes in the c4 section or the Camaro forums...I found mine over at thirdgen

Hope all this helps