whats the diff between 90(375) &92(405) - ZR-1 Net Registry Forums

gmbrasco@aol.com · 12-26-2005

hi guys, thank you for the previous support, im still considering the trade for the 90zr1. can anyone tell me what chevy did to bump up the hp, and can it be done on the 90. also what kind of mods can be done without affecting value, this 90z doesnt have orig wheels, has some mods.
also besides the front bumper, is there any other differences between 90-95, mechianicly. thanks agian

Kevin · 12-26-2005

The hp bump didn't come untill 93. Modifications to the cylinder heads and valvetrain; platinum-tipped spark plugs, and the exclusive use of synthetic oil were among the upgrades that brought this about. In addition, an electrical, linear exhaust gas recirculation system improved emissions control.

Aurora40 · 12-27-2005

I don't think anyone can say what mods will/won't affect value. But if you are concerned, then anything you can undo should be ok (chip, exhaust, wheels).

The way I see it, there are plenty of totally original 1990 cars out there with like 7 miles on them. I can't compete with that, so why not have a lowish mileage car in tip-top shape that is modded cleanly to run the way they were made to run. Open up the in and out and let the motor sing, the 350 packages offered by various people/companies are really appealing to me.

Oh, also the 1993+ cars had a less restrictive exhaust system, I believe mainly centered around bigger resonator piping? The headers were different, though I don't know if they are actually considered better?

Kevin · 12-27-2005

I know I'm not concerned with keeping the car stock, but there are mods that you can do that no one will ever be able to check unless they take apart the top end of the motor and compare it to another, stock ZR-1. Port and polish the top end, chip. Toss in headers/exhaust you are looking at 400 to the wheels in a car that looks bone stock

12-26-2005	#1
gmbrasco@aol.com Join Date: Dec 2005 Posts: 2	whats the diff between 90(375) &92(405) hi guys, thank you for the previous support, im still considering the trade for the 90zr1. can anyone tell me what chevy did to bump up the hp, and can it be done on the 90. also what kind of mods can be done without affecting value, this 90z doesnt have orig wheels, has some mods. also besides the front bumper, is there any other differences between 90-95, mechianicly. thanks agian

12-26-2005	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: whats the diff between 90(375) &92(405) The hp bump didn't come untill 93. Modifications to the cylinder heads and valvetrain; platinum-tipped spark plugs, and the exclusive use of synthetic oil were among the upgrades that brought this about. In addition, an electrical, linear exhaust gas recirculation system improved emissions control. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

12-27-2005	#3
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: whats the diff between 90(375) &92(405) I don't think anyone can say what mods will/won't affect value. But if you are concerned, then anything you can undo should be ok (chip, exhaust, wheels). The way I see it, there are plenty of totally original 1990 cars out there with like 7 miles on them. I can't compete with that, so why not have a lowish mileage car in tip-top shape that is modded cleanly to run the way they were made to run. Open up the in and out and let the motor sing, the 350 packages offered by various people/companies are really appealing to me. Oh, also the 1993+ cars had a less restrictive exhaust system, I believe mainly centered around bigger resonator piping? The headers were different, though I don't know if they are actually considered better? __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

12-27-2005	#4
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Re: whats the diff between 90(375) &92(405) I know I'm not concerned with keeping the car stock, but there are mods that you can do that no one will ever be able to check unless they take apart the top end of the motor and compare it to another, stock ZR-1. Port and polish the top end, chip. Toss in headers/exhaust you are looking at 400 to the wheels in a car that looks bone stock __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"