No more cats
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,398
Likes: 1
From: Loveland Co
Cruise-In III Veteran
No more cats
Well the pre cats and main cat on my car have been gutted, the car actually is not that loud at all, there is a noticable increase in interior resonace around 2500 rpms, but on the highway at 2,000 and 80mph the exhaust is barely louder than with just muffler eliminators. Also the car has notcably more pull from 3000-5000 rpms. There was a small loss of torque just enough you can barely notice, and I am adding a crossover pipe in the back Y here shortly so hopefully that will help remody the resonance I will keep you guys updated if there is interest
-NO91
-NO91
Team Owner
Joined: Apr 2000
Posts: 27,818
Likes: 8
From: CT
Re: No more cats (No Ordinary 91)
first off, admiral blue? whatever that is, it's gorgeous. yes, cars without cats don't really sound THAT much louder than with it bottled up.
enjoy the ride..it's a sweet one!
[Modified by JD 90 383, 4:12 PM 2/26/2002]
enjoy the ride..it's a sweet one!
[Modified by JD 90 383, 4:12 PM 2/26/2002]
Burning Brakes
Joined: Oct 2000
Posts: 897
Likes: 0
From: My Own Private Idaho
Re: No more cats (No Ordinary 91)
With that much torque (342), your posted hp rating (236) must be around 3620rpm. I've seen dynos of LT1s that DO drop off ~4000, but their HP continues to climb until ~5200.
236 must not be your peak HP!!! :confused:
236 must not be your peak HP!!! :confused:
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,398
Likes: 1
From: Loveland Co
Cruise-In III Veteran
Re: No more cats (cgtarga1)
With that much torque (342), your posted hp rating (236) must be around 3620rpm. I've seen dynos of LT1s that DO drop off ~4000, but their HP continues to climb until ~5200.
236 must not be your peak HP!!! :confused:
236 must not be your peak HP!!! :confused:
[Modified by No Ordinary 91, 2:21 PM 2/26/2002]
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: No more cats (No Ordinary 91)
236 must not be your peak HP!!! :confused: Nope that was peak, both peaked about 4500 I'll repost my dyno sheet here in a sec
:confused: An L98's torque should peak MUCH sooner than 4500. More like 2900.
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,398
Likes: 1
From: Loveland Co
Cruise-In III Veteran
Re: No more cats (JD 90 383)
first off, admiral blue? whatever that is, it's gorgeous. yes, cars without cats don't really sound THAT much louder than with it bottled up.
enjoy the ride..it's a sweet one!
enjoy the ride..it's a sweet one!
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Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,398
Likes: 1
From: Loveland Co
Cruise-In III Veteran
Re: No more cats (NUckINg FuTS)
hey NO91,
What % tint do you have on your car? It looks really nice.
What % tint do you have on your car? It looks really nice.
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Re: No more cats (No Ordinary 91)
Horsepower and torque due meet at 5250, take a look at the graph more carefully, there are two different graphs on the sheet. The HP gragh is shifted up much higher on the paper but if you study the numbers you will see that they both read about 175 at 5250 RPM.
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: No more cats (JD 90 383)
first off, admiral blue? whatever that is, it's gorgeous. yes, cars without cats don't really sound THAT much louder than with it bottled up.
Thread Starter
Le Mans Master
Joined: Feb 2001
Posts: 6,398
Likes: 1
From: Loveland Co
Cruise-In III Veteran
Re: No more cats (Glock'94)
first off, admiral blue? whatever that is, it's gorgeous. yes, cars without cats don't really sound THAT much louder than with it bottled up.
I bet mine sounds louder :crazy: :crazy: :crazy:
I bet mine sounds louder :crazy: :crazy: :crazy:
Burning Brakes
Joined: Oct 2000
Posts: 897
Likes: 0
From: My Own Private Idaho
Re: No more cats (bjankuski)
Horsepower and torque due meet at 5250, take a look at the graph more carefully, there are two different graphs on the sheet. The HP gragh is shifted up much higher on the paper but if you study the numbers you will see that they both read about 175 at 5250 RPM.