Help!
Thread Starter
Junior Member
Joined: Aug 2001
Posts: 59
Likes: 0
From: PHX
Car: 92' Z28
Engine: 5.7
Axle/Gears: 3.23
Help!
This is a continuation of a post I made to the engine category about having my car dyno'ed. It made 223hp (stock 92 5.7)the following will explain my problem.
You guy's sound like the dyno guy!
. The only mod that was done was just before the dyno run. One of the pipes on my stock exhaust was leaking at the muffler. The dyno shop installed a SLP twin tip stainless muffler and tail pipes off of a stock camaro SS. The only other things not stock are K&N stock type air filters. The car has had Mobil 1 in it since new, and now has 66,340 miles on it. Either I got lucky and GM slipped an extra strong motor in, or the SLP is REALLY performing well! ONE BIG PROBLEM! The car definately has a seat of the pants change in power with the new exhaust, NOW THE PROBLEM, I started having service engine soon warnings and a slight stumble as the car warmed up. When I shut her off at home I heard a gurgling sound from the rear of the car. I took off the gas cap and started the car, HOT HOT AIR! I think the new stainless muffler is transferring too much heat! There is a 2 to 3" space between the tank and the muffler but i am extremely dissapointed, let me see fast car, or BOOM! Any thoughts?
You guy's sound like the dyno guy!
. The only mod that was done was just before the dyno run. One of the pipes on my stock exhaust was leaking at the muffler. The dyno shop installed a SLP twin tip stainless muffler and tail pipes off of a stock camaro SS. The only other things not stock are K&N stock type air filters. The car has had Mobil 1 in it since new, and now has 66,340 miles on it. Either I got lucky and GM slipped an extra strong motor in, or the SLP is REALLY performing well! ONE BIG PROBLEM! The car definately has a seat of the pants change in power with the new exhaust, NOW THE PROBLEM, I started having service engine soon warnings and a slight stumble as the car warmed up. When I shut her off at home I heard a gurgling sound from the rear of the car. I took off the gas cap and started the car, HOT HOT AIR! I think the new stainless muffler is transferring too much heat! There is a 2 to 3" space between the tank and the muffler but i am extremely dissapointed, let me see fast car, or BOOM! Any thoughts? 
Supreme Member
Joined: May 2001
Posts: 1,074
Likes: 4
From: Orange, CT, USA
Car: 1983 Pontiac Firebird
Engine: 400HP 350
Transmission: 700R4
Axle/Gears: 3.42
Sounds like the muffler you got is cloged. What happening is the gas are going in b ut not out so it's heating up and transfering heat into your tank. if i were you, take off the muffler, or you may risk a, Boom!!! While driving.
:hail: :lala:
:hail: :lala:
Supreme Member
Joined: Apr 2001
Posts: 4,969
Likes: 0
From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Is the heat shield there? Did you know there is supposed to be one there? I know mines there, cuz if it's cold out, it has a nice ring to it at idle. 
AJ
AJ
