new exhaust.
Thread Starter
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Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
new exhaust.
well i been thinkin (never good) and i thought what i could do to my exhaust. i was thinking about taking off the 1st cat and running dual 2" pipe into flowmaster 40 series (maybe delta flows) into 3 or 3.5" tips. has anyone did this? and would i loose some bottem end tq? and what would i do with the oxy sensor?
Senior User
Joined: Nov 2002
Posts: 298
Likes: 1
From: Kentucky
new exhaust.
[updated:LAST EDITED ON 05-Jan-03 AT 09:57 AM (EST)]Hello Optikal,
I removed the 2nd cat and replaced it with a High flow cat from Extreme flow technologies and then put a Flowmaster Deltaflow 40 series mufflewr behind that. I used 2.5 inch pipe all the way from the manifold to the Highflow cat and from it to the Flowmaster and all the way out behind the rear wheel.(Stock Location) No tips for me!!
I would imagine that ELIMINATING the CATS would make it a little louder, The Tips would do this too!!
It sounds GREAT, Nice throaty rumble at idle and the Beefy V-8 sound under acceleration.
I gained some lowend torque and a little more on top end also!!
I hope this helps ya'...
ftwfred
I removed the 2nd cat and replaced it with a High flow cat from Extreme flow technologies and then put a Flowmaster Deltaflow 40 series mufflewr behind that. I used 2.5 inch pipe all the way from the manifold to the Highflow cat and from it to the Flowmaster and all the way out behind the rear wheel.(Stock Location) No tips for me!!
I would imagine that ELIMINATING the CATS would make it a little louder, The Tips would do this too!!
It sounds GREAT, Nice throaty rumble at idle and the Beefy V-8 sound under acceleration.
I gained some lowend torque and a little more on top end also!!
I hope this helps ya'...
ftwfred
Thread Starter
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Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
new exhaust.
im actually the one who told u about doing that since i have the same set up minus the high flow cat, if u dont recall. im just wondering about getting most bang for the buck and seen the v-8 guys running that set up and wondered how it would work for us.
Senior User
Joined: Apr 2002
Posts: 484
Likes: 0
From: St. Louis, MO USA
new exhaust.
from what im understanding, the second cat would be the one to remove or hollow out, then use 2.5" pipe to a muffler of choice. better yet is dump both cats and get a highflow one. these combos would mostly help in the high-end, but power should increase throughout the rpm range. hope this helps a bit.
Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
new exhaust.
I don't believe in the backpressure = torque theory.
If you can't get away with choppin both cats, then either take off one or run a single high flow.
WHAT THE HECK!!??
didn't you just get that new exhaust?! quit messin with tha thing!
you're acting like... me.. or something.
If you can't get away with choppin both cats, then either take off one or run a single high flow.
WHAT THE HECK!!??
didn't you just get that new exhaust?! quit messin with tha thing!
you're acting like... me.. or something.
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Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
new exhaust.
>I don't believe in the backpressure = torque theory.
I am with you rhetor. Backpressure never helps power. How can it help torque to push backward against the piston when it is trying to expell the spent gasses? Now proper exhaust tuning and separation of exhaust pulses from consecutively firing cylinders can and does help torque.
INLINE SIX POWER!
'95 F150 XL
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
I am with you rhetor. Backpressure never helps power. How can it help torque to push backward against the piston when it is trying to expell the spent gasses? Now proper exhaust tuning and separation of exhaust pulses from consecutively firing cylinders can and does help torque.
INLINE SIX POWER!
'95 F150 XL300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
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