Notices
C6 Corvette ZR1 & Z06 General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
Sponsored by:
Sponsored by: Kraken

[Z06] What's a "better" set of longtubes...

Thread Tools
 
Search this Thread
 
Old 02-01-2016, 10:07 AM
  #21  
0Anthony @ LGMotorsports
Former Vendor
 
Anthony @ LGMotorsports's Avatar
 
Member Since: Aug 2005
Location: Lewisville TX
Posts: 16,898
Received 406 Likes on 300 Posts
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13


Default

Originally Posted by EX1
After having both LG 1 7/8 and ARH 2" on my car, I would recommend the ARHs. The LGs are very nice but I HATE slip fit connections. Headers that expensive shouldn't use slip fit IMO. .
The slip fit is there for a few reasons.

1. It maintains a smooth inside flow, with no interruption like you would have on a ball and socket or similar design

2. There is no loss in clearance with a slip fit. When you have a flange or a ball and socket design that material looses clearance around the frame and ground.

The $11k set that was on the ALMS car was slip too. So it isn't a cost thing.

Last edited by Anthony @ LGMotorsports; 02-01-2016 at 10:07 AM.
Old 02-01-2016, 12:31 PM
  #22  
EX1
Melting Slicks
 
EX1's Avatar
 
Member Since: Jan 2010
Location: Lubbock TX
Posts: 2,137
Received 21 Likes on 17 Posts

Default

Originally Posted by Anthony @ LGMotorsports
The slip fit is there for a few reasons.

1. It maintains a smooth inside flow, with no interruption like you would have on a ball and socket or similar design

2. There is no loss in clearance with a slip fit. When you have a flange or a ball and socket design that material looses clearance around the frame and ground.

The $11k set that was on the ALMS car was slip too. So it isn't a cost thing.
Thanks for the reply. I know you guys must have your reasons for using them. I just prefer being able to disconnect the longtubes from the x-pipe without needing to loosen the entire exhaust system. Plus I tend to have to use some WD40 or silicon spray to dissemble or re-assemble the slip-fits if it hasn't been touched in while. I also find that the ball and socket type connection keep the exhaust system from rotating and moving around over time (especially on cars with an aggresive cam) causing the system to touch the tunnel or causing one of the axle backs to become uneven with the other. Just my experiences. I still recommend the Super Pros or ARHs to anyone who asks. Usually they go with what is on sale
Old 02-01-2016, 01:07 PM
  #23  
0Anthony @ LGMotorsports
Former Vendor
 
Anthony @ LGMotorsports's Avatar
 
Member Since: Aug 2005
Location: Lewisville TX
Posts: 16,898
Received 406 Likes on 300 Posts
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13


Default

Originally Posted by EX1
Thanks for the reply. I know you guys must have your reasons for using them. I just prefer being able to disconnect the longtubes from the x-pipe without needing to loosen the entire exhaust system. Plus I tend to have to use some WD40 or silicon spray to dissemble or re-assemble the slip-fits if it hasn't been touched in while. I also find that the ball and socket type connection keep the exhaust system from rotating and moving around over time (especially on cars with an aggresive cam) causing the system to touch the tunnel or causing one of the axle backs to become uneven with the other. Just my experiences. I still recommend the Super Pros or ARHs to anyone who asks. Usually they go with what is on sale


One trick I learned on the race cars if you are using a slip fit design and are going to be taking it on and off the car a lot. Copper anti seize works wonders. I don't know if I would use it on every car, but for sure those coming on and off the car a lot.....like a race/track car.

http://www.mscdirect.com/product/det...S_010=00263210
Old 02-01-2016, 01:12 PM
  #24  
EX1
Melting Slicks
 
EX1's Avatar
 
Member Since: Jan 2010
Location: Lubbock TX
Posts: 2,137
Received 21 Likes on 17 Posts

Default

Originally Posted by Anthony @ LGMotorsports
One trick I learned on the race cars if you are using a slip fit design and are going to be taking it on and off the car a lot. Copper anti seize works wonders. I don't know if I would use it on every car, but for sure those coming on and off the car a lot.....like a race/track car.

http://www.mscdirect.com/product/det...S_010=00263210
I use that stuff on plenty of other things, can't believe I never thought to use it on the exhaust system Thanks
Old 02-02-2016, 02:41 AM
  #25  
REDZED2
Melting Slicks
 
REDZED2's Avatar
 
Member Since: Sep 2005
Location: Winnipeg
Posts: 2,567
Received 206 Likes on 164 Posts

Default

ARP header studs are worth EVERY SINGLE PENNY! Never do headers on any Z without them!!

Old 02-02-2016, 07:31 AM
  #26  
Z5108
Racer
 
Z5108's Avatar
 
Member Since: Oct 2014
Posts: 498
Received 11 Likes on 11 Posts
Default

Originally Posted by Millenium Z06
I have 1 3/4 LG Super Pros and installed them in my garage with jack stands, I wouldn't call the install difficult or say they didn't fit well.

I'd like to try some 1 7/8 ARH (because of the longer primaries then the LG 1 7/8) but I'm not entirely convinced that I'd pick up significant gains and that I'd loose a lot more torque vs the LG super pros on the car now which have been flawless for 10 years.

I'd also like to try some stepped headers but my wallet doesn't want to be a guinea pig.
what is step headers
Old 02-02-2016, 07:38 AM
  #27  
double06
Melting Slicks
 
double06's Avatar
 
Member Since: May 2006
Location: Potomac MD
Posts: 3,328
Received 374 Likes on 299 Posts

Default

Step header is when the tubes change size usually going upward from say 1 3/4 to 1 7/8 on their way to the collector. They are usually more expensve as more labor and welding are involved.
Old 02-06-2016, 03:35 PM
  #28  
REDZED2
Melting Slicks
 
REDZED2's Avatar
 
Member Since: Sep 2005
Location: Winnipeg
Posts: 2,567
Received 206 Likes on 164 Posts

Default

uhh.. 1 7/8 headers on an LS7 7.0 will make more power/torque everywhere than a 1 3/4 C5 346 ci. header. 1 7/8" is the starting size for a C6Z. Didn't know LG made a 1 3/4" LS7 header.. that seems restrictive.
Old 02-06-2016, 04:20 PM
  #29  
XLR8-R
Racer
 
XLR8-R's Avatar
 
Member Since: Jul 2007
Location: New Braunfels Texas
Posts: 352
Received 47 Likes on 38 Posts

Default

Originally Posted by wantbluC6
uhh.. 1 7/8 headers on an LS7 7.0 will make more power/torque everywhere than a 1 3/4 C5 346 ci. header. 1 7/8" is the starting size for a C6Z. Didn't know LG made a 1 3/4" LS7 header.. that seems restrictive.
I don't think they are too restrictive, just trapped 131 in the quarter with them...stock intake manifold and stock cam...
Old 02-06-2016, 05:46 PM
  #30  
RamAir972003
Melting Slicks
 
RamAir972003's Avatar
 
Member Since: Mar 2009
Posts: 2,312
Received 62 Likes on 59 Posts

Default

Some headers leak a lot not saying any names with experiences I would go with ARH they make the most hp.......and fit perfect...
Old 02-06-2016, 06:20 PM
  #31  
mewalker2
Racer
 
mewalker2's Avatar
 
Member Since: Feb 2011
Location: Alton Virginia
Posts: 265
Received 28 Likes on 8 Posts

Default

Here's my Kooks 1-7/8". Very happy with them! Great fitment.
Attached Images  
Old 02-06-2016, 10:11 PM
  #32  
phipp85
Burning Brakes
 
phipp85's Avatar
 
Member Since: Apr 2012
Location: Atlanta Georgia
Posts: 1,045
Received 37 Likes on 34 Posts

Default

Originally Posted by wantbluC6
ARP header studs are worth EVERY SINGLE PENNY! Never do headers on any Z without them!!

Best $100 bucks I've ever spent!! Love those things.
Old 02-07-2016, 12:20 AM
  #33  
MTPZ06
Team Owner
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 35,883
Received 1,592 Likes on 1,335 Posts

Default

Originally Posted by wantbluC6
ARP header studs are worth EVERY SINGLE PENNY! Never do headers on any Z without them!!

ARP hardware when doing an R&R on your heads as well.
The following users liked this post:
REDZED2 (02-08-2016)
Old 02-07-2016, 08:53 AM
  #34  
Undy
Safety Car

 
Undy's Avatar
 
Member Since: Dec 1999
Location: Virginia Beach, VA & Port Charlotte, FL (snowbird)
Posts: 4,407
Received 1,095 Likes on 578 Posts

Default

I like Stage 8 locking header bolts. I've been using them for the last 30 years on every performance vehicle I've owned and never have had a single header flange exhaust leak.
Old 02-07-2016, 01:42 PM
  #35  
REDZED2
Melting Slicks
 
REDZED2's Avatar
 
Member Since: Sep 2005
Location: Winnipeg
Posts: 2,567
Received 206 Likes on 164 Posts

Default

Originally Posted by XLR8-R
I don't think they are too restrictive, just trapped 131 in the quarter with them...stock intake manifold and stock cam...
Good for you..yeah all stock they may be ok.. i have also seen guys with 2" with bolt ons gain 35 rwhp.. apples to bananas. Lol.. I know a guy that trapped 129 bone stock in his 06 z.. 99% of header companies start at 1 7/ 8" for a C6 Z06 ls7 with 427 cubes... but to each his own man.

D

Last edited by REDZED2; 02-07-2016 at 01:44 PM.
Old 02-07-2016, 01:49 PM
  #36  
Millenium Z06
Moderator
 
Millenium Z06's Avatar
 
Member Since: Jun 2004
Posts: 18,581
Received 312 Likes on 246 Posts

Default

Originally Posted by wantbluC6
Good for you..yeah all stock they may be ok.. i have also seen guys with 2" with bolt ons gain 35 rwhp.. apples to bananas. Lol.. I know a guy that trapped 129 bone stock in his 06 z.. 99% of header companies start at 1 7/ 8" for a C6 Z06 ls7 with 427 cubes... but to each his own man.

D
I make 580 to the wheels with 1 3/4" headers, I dont see me picking up 35 rwhp by going to 2". 434ci BTW
Old 02-07-2016, 04:24 PM
  #37  
no0one
Intermediate
 
no0one's Avatar
 
Member Since: Jul 2015
Location: Royal Oak MI
Posts: 38
Likes: 0
Received 2 Likes on 2 Posts
Default

does anyone use cross over headers aka 180deg headers on ls7 corvettes?

Get notified of new replies

To What's a "better" set of longtubes...

Old 02-08-2016, 01:09 PM
  #38  
show723
Racer
 
show723's Avatar
 
Member Since: Dec 2008
Location: Whitesboro NY
Posts: 459
Received 3 Likes on 3 Posts

Default

Originally Posted by wantbluC6
ARP header studs are worth EVERY SINGLE PENNY! Never do headers on any Z without them!!

I know not all headers require studs, but is the benefit of going header studs vs. bolts just better reliability and piece of mind?
Old 02-08-2016, 01:23 PM
  #39  
MTPZ06
Team Owner
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 35,883
Received 1,592 Likes on 1,335 Posts

Default

Originally Posted by Millenium Z06
I make 580 to the wheels with 1 3/4" headers, I dont see me picking up 35 rwhp by going to 2". 434ci BTW
Neither do I; but I think an additional 10-15 wouldn't be out of the question on your motor. Maybe it's what gets your combo to 600 rwhp with a little extra tuning time on the dyno? Is that worth your time and effort (and expense)? That's up to you...but you could recoup (albeit a small) portion of that by selling your current LT's I suppose.
Old 02-08-2016, 01:51 PM
  #40  
Z5108
Racer
 
Z5108's Avatar
 
Member Since: Oct 2014
Posts: 498
Received 11 Likes on 11 Posts
Default

Originally Posted by mewalker2
Here's my Kooks 1-7/8". Very happy with them! Great fitment.
what did those run you?


Quick Reply: [Z06] What's a "better" set of longtubes...



All times are GMT -4. The time now is 08:00 PM.