Exhaust time
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Instructor
Joined: Jan 2002
Posts: 227
Likes: 0
From: CA
Exhaust time
Ok, I think I am ready for a new exhaust system. Any suggestions on a good setup for a 1990 L98? I'd like power more than anything but a good sound would be nice too!! Also any other info like prices and where to by would be great to. Thanx! :D
Safety Car
Joined: Oct 2001
Posts: 4,763
Likes: 1
From: Connectivette
Re: Exhaust time (vader86)
One of my first mods was to put on Eliminators ($150 approx. I believe) They are still on the car and compliment my SuperRam and long tube headers nicely. They are starting to get loud now with the addition of the SuperRam but on a stock motor it rumbles and is not too loud.
Advanced
Joined: Jan 2003
Posts: 64
Likes: 0
From: Battle Creek MI
Re: Exhaust time (C490Vette)
I am thinking about running true duals back to eliminators. From the posts I have read, the stock y pipe is very restrictive and should be replaced if you stay with the current setup. RandomTech and Catco have good hiflow cats
Burning Brakes
Joined: Apr 2002
Posts: 755
Likes: 0
From: Patterson CA
Re: Exhaust time (C490Vette)
If you're not running headers get a catless front y-pipe, high flow main cat and a rear y-pipe with crossover pipe and eliminators. If you are gonna run headers then scratch the front y-pipe. :thumbs: That's my setup and I love it sound wise and performance as well. The crossover pipe on the rear y will help with the resonance. Just make sure the tips stick out a little past the bumper.
Le Mans Master
Joined: Dec 1999
Posts: 8,540
Likes: 1
From: And on the fifth day, subpoenas were served to Obama senior staff
Re: Exhaust time (C490Vette)
90 and 91's have a problem with the EGR valve and low restriction exhausts. The valve is a positive back-pressure design and may not open with low back pressure. This is not necessarly a huge problem, but will turn on the SES light after short drives on the highway. A chip can be programmed to remove the EGR test, but this will cost some money.
Best to check with other 90 and 91 owners who have done exhaust mods and what works.
Good Luck
Pete
Best to check with other 90 and 91 owners who have done exhaust mods and what works.
Good Luck
Pete
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Re: Exhaust time (PeteL)
90 and 91's have a problem with the EGR valve and low restriction exhausts. The valve is a positive back-pressure design and may not open with low back pressure. This is not necessarly a huge problem, but will turn on the SES light after short drives on the highway.
Good luck
