ZZ4 in '89 305 Iroc

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Mar 24, 2001 | 10:44 AM

[-sLaYeR-]

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Joined: Jul 2000

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From: Maple Ridge, BC, Canada

ZZ4 in '89 305 Iroc

Ok, here's the deal...

I now have the money to get a ZZ4 crate motor. My question is, what do I have to change if I do this. The current roc is a 5spd, so I figure that's one thing that will have to go... I'm trying to figure out how much more this is going to cost me.

All info helps,
Jay

Thanks in advance

Mar 24, 2001 | 11:40 AM

R.O.B.

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Joined: Aug 1999

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From: Glendale, AZ

Why ditch the tranny? That motor should work fine, if in doubt, change the cam.

------------------
Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.

Mar 25, 2001 | 02:56 PM

Kevin91Z

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From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

The heads on the ZZ4 engine (same as the L98 Corvette) have a different bolt pattern than whats on your intake manifold. You should get an aftermarket intake anyway to let that engine breathe. I put ZZ4 heads and cam on my engine and it ran low 13's with 280 HP at the wheels.

------------------
West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
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