LT1-LT4 Modifications 1993-97 Gen II Small Block V8

qtp cutout

Thread Tools
 
Search this Thread
 
Old Jul 25, 2007 | 12:33 AM
  #1  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default qtp cutout

where is the best place to put the qtp cutout on my 94 formula? what size is the stock exhaust pipe before the cat?
Reply
Old Jul 25, 2007 | 08:43 AM
  #2  
imnotplutonium's Avatar
TECH Resident
iTrader: (4)
 
Joined: Mar 2004
Posts: 869
Likes: 0
From: Houston,TX
Default

...3"
Reply
Old Jul 25, 2007 | 09:28 AM
  #3  
92LT1RS's Avatar
On The Tree
iTrader: (3)
 
Joined: Sep 2003
Posts: 168
Likes: 0
From: Houston Area
Default

is the car stock? if so, don't put a cutout on it
Reply
Old Jul 25, 2007 | 11:53 AM
  #4  
chavez885's Avatar
TECH Addict
iTrader: (12)
 
Joined: Dec 2005
Posts: 2,382
Likes: 1
From: Concord, CA
Default

3" is the cutout size u want,you can order it from here http://www.ws6project.com/user_stor/...0b5231fc6f9417 fast shipping and good price. Nothing wrong with putting it on a stock car.
Reply
Old Jul 25, 2007 | 10:42 PM
  #5  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default

yea why not put one on a stock car? why do i want 3in? just wondering?
Reply
Old Jul 25, 2007 | 11:48 PM
  #6  
Pntbll309's Avatar
11 Second Club
15 Year Member
iTrader: (33)
 
Joined: Nov 2006
Posts: 926
Likes: 0
From: Colorado Springs
Default

3'' is the stock pipe size.
Reply
Old Jul 26, 2007 | 12:20 AM
  #7  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default

ok. now where is the best place to put the cutout?
Reply
Old Jul 26, 2007 | 01:32 AM
  #8  
That_guy's Avatar
TECH Resident
iTrader: (1)
 
Joined: Dec 2006
Posts: 899
Likes: 0
From: Desoto Tx
Default

on the y pipe or I pipe from what ive been reading.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-1

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-2

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-3

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-4

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-5

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-6

10 Camaros You Should Never Buy

 
story-7

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
story-8

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

 Brett Foote
story-9

10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

 Verdad Gallardo
Old Jul 26, 2007 | 01:36 AM
  #9  
Schweet97Z's Avatar
12 Second Club
iTrader: (35)
 
Joined: Jan 2006
Posts: 1,550
Likes: 0
From: Danville PA
Default

3 inch is NOT the stock exhuast pipe size.
Reply
Old Jul 26, 2007 | 01:41 AM
  #10  
Pntbll309's Avatar
11 Second Club
15 Year Member
iTrader: (33)
 
Joined: Nov 2006
Posts: 926
Likes: 0
From: Colorado Springs
Default

Originally Posted by Schweet97Z
3 inch is NOT the stock exhuast pipe size.
SWEET!! Then what is?
Reply
Old Jul 26, 2007 | 01:41 AM
  #11  
nighthawk15's Avatar
TECH Resident
 
Joined: Jul 2007
Posts: 749
Likes: 1
From: Spokane, WA
Default

Yeah isn't the stock exhaust 2.75"?
Reply
Old Jul 26, 2007 | 01:45 AM
  #12  
Schweet97Z's Avatar
12 Second Club
iTrader: (35)
 
Joined: Jan 2006
Posts: 1,550
Likes: 0
From: Danville PA
Default

nighthawk is right. also put the cut out in the I-pipe right before it goes over the rear axle.

https://ls1tech.com/forums/generation-iii-external-engine/710424-got-my-cutout.html

Last edited by Schweet97Z; Jul 26, 2007 at 02:00 AM.
Reply
Old Jul 26, 2007 | 11:27 AM
  #13  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default

why there and not before the cat???
Reply
Old Jul 26, 2007 | 12:30 PM
  #14  
chavez885's Avatar
TECH Addict
iTrader: (12)
 
Joined: Dec 2005
Posts: 2,382
Likes: 1
From: Concord, CA
Default

No room for a cutout before the cat,you'd have to chop off your cat,which im sure would go REAL well in california we can do that here in oklahoma BTW 3" is not the stock exhaust size,but 3" makes it alot easier to install when its getting welded in,i'd go with 3",the exhaust shop will thank you for it.
Reply
Old Jul 26, 2007 | 12:56 PM
  #15  
imnotplutonium's Avatar
TECH Resident
iTrader: (4)
 
Joined: Mar 2004
Posts: 869
Likes: 0
From: Houston,TX
Default

Ok 3" is what I used when I got mine installed wayyy back when. I just assumed it was the exact size of the stock pipe.
Reply
Old Jul 26, 2007 | 01:12 PM
  #16  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default

oh ok i thought it might be a clearance issue.. that blows. so i should install it after the cat under the passenger seat? thats the 2nd best lol
Reply
Old Jul 26, 2007 | 02:45 PM
  #17  
chavez885's Avatar
TECH Addict
iTrader: (12)
 
Joined: Dec 2005
Posts: 2,382
Likes: 1
From: Concord, CA
Default

Yea pretty much the only logical place to put it with stock exhaust.
Reply
Old Jul 26, 2007 | 02:47 PM
  #18  
JTSLP559's Avatar
Thread Starter
TECH Regular
iTrader: (3)
 
Joined: Aug 2006
Posts: 428
Likes: 0
From: fresno california
Default

is by the passenger seat? aft the cat?
Reply
Old Jul 26, 2007 | 03:25 PM
  #19  
Schweet97Z's Avatar
12 Second Club
iTrader: (35)
 
Joined: Jan 2006
Posts: 1,550
Likes: 0
From: Danville PA
Default

yea, it will be right behind the passanger seat before the pipe goes over the axle. that way if you use an electric motor to open and close the cutout there is an indentation on the floor board to where you can turn the cut-out motor upwards so it doesnt hang low and get ripped off.
Reply
Old Jul 27, 2007 | 12:50 AM
  #20  
Pntbll309's Avatar
11 Second Club
15 Year Member
iTrader: (33)
 
Joined: Nov 2006
Posts: 926
Likes: 0
From: Colorado Springs
Default

Dont wanna hijack the thread, but what do most of you all notice,gain wise, in the 1/4 with a cutout?
Reply



All times are GMT -5. The time now is 12:17 PM.

story-0
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-1
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-2
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-3
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-4
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-5
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-6
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-7
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE