I currently own a 1989 L98 IROC-Z with the mods listed below. The car has close to 110,000 miles on it and I am thinking about switching to an entirely new setup.

I am toying with the idea of dropping in a ZZ4 crate motor backed by a T56/3.73's.

First off, I live in NJ, and I will need to get through emissions. Does anyone here think that is possible?

Secondly, I will be keeping the TPI with the ZZ4. What will I need to do to make sure that it is tip-top running condition? What other mods will the car need so that it can handle that kind of power and be able to put it to the ground as well.

Thanks.

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1989 IROC-Z
350c.i. TPI
rebuilt 700R4 with shift kit
3'' Monza Pacesetter cat back exhaust (minus the muffler)[SOUNDS OF THIS ON MY WEBPAGE]
new dual cats
3.23 Posi rear
hypertech chip
under drive pulleys
adjustable fuel pressure regulator
K&N Air Filters
Excalibur alarm, keyless entry and remote start
new:
struts, shocks, bearings, distributor, cap, rotor, alternator, battery, regulator
245 ZR16 50 Tires, Rotors and brake pads all the way around

Go to my webpage to find out more about it.
You can also see pictures, and hear sounds as well.
http://go.to/iroc-z

AOL IMer: JRShotliff

 

89,

The crate engien with a TPI system should act just like any other 350 with the TPI and the ZZ4 cam. You would probably want to oust the Hypertech PROM and get a custom designed more for use with your new cam profile. You'll need to keep the EGR and EVAP, cat converters and A.I.R. system to pass inspection, but none of those have to cost you any power (only space).

A ZZ4 cam will want to breathe more than the TPI was originally designed and at a higher RPM, so you might need to alter the plenum and base (porting). Your AFPR might be very helpful in getting the most of the setup once the PROM is burned.

As for getting the best use of more power, you'll need to get good drag tires on the rear and make sure the rear suspension and torque arm are in good condition and correctly adjusted for angle. You might want to get a pair of front drag tires to lighten the load and roll more easily.

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Later,
Vader
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"Fear is how I fall, Confusing what is real..."
Adobe Acrobat Reader

 

I have a friend outside of philly w/ the same motor, and close to the same mods. He passes emmissions w/ no prob!

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Corry Lazarowitz
clazarow@voicenet.com
clazarowitz@hotmail.com
1987 Pontiac Trans AM (GTA?) 350 or is it a 305?! TPI
SLP 1 3/4" headers, 3" cat back (stock cat
MSD ignition.
MSD Blaster SS coil.
3.73 Rear end gears
Accell 8.8 Wires
Bosh +4 Spark Plugs (Don't know if they really help but hell!)
Holley AFPR
Race Built Automatic trans ('vette servo, shift kit, tightly packed clutches)--just needs titanium gears now!
Newly gutted cat (the car gutted it's own cat!)
Hypertech Chip (Just found out I had it! :eek
More soon when funds are avail...

 

Corry,

Outside of Philly, and in New Jersey? I am concerned becuase New Jersey emissions is really strict.