Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself.

New Posts Contact us

Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

LS1 extractors

vr304

Well-Known Member
Joined
Feb 9, 2013
Messages
2,834
Reaction score
1,648
Points
113
Location
Auckland, New Zealand
Members Ride
2007 ssv manual
Even an aftermarket big block Chevy heads wouldn’t have a 3 inch diameter exhaust ports
 

Red LS1 V8

Member
Joined
Feb 6, 2017
Messages
46
Reaction score
7
Points
8
Age
54
Location
Sydney
Members Ride
VY LS1
Basically comes down to 2-3 categories:

tri-y for ground clearance issues or the d.i.y sucker at home performing all work on the car at home.

1 3/4 4 into 1's for those willing to put up with clearance issues & heat all for the better sound & top end...mild cam & head 5.7/6.0

1 7/8 for those that just want crazier sound & top end power,clearance/heat issues even though more suited to 6.2 or strokers,f/induction.


Thanks but while it may be good info for readers, this has really moved away from what I was asking, I understand the differences between the choices. I have actually already had Tri-Y Pacemakers before I had 1 5/8 4 > 1 shorties. I personally wouldnt buy Tri-Y again over the CSV shorties (which were the pick of the bunch). I also have no interest in 1 7/8 headers. I am only looking at whether I move from my shorties to 1 3/4 4 >1 for my H/C LS1. Its mainly to free up some ponies, even if only a few but not pushed all the way to the top of the range like the 1 7/8 tend to do on a 5.7 (US guys love this option though).

So, the exhaust port question came into it, a basic point that seems hard to find an answer to surprisingly. However, clearance is an issue. Some say there are clearance issues with long 4>1, others say its brand dependent. This is what I was looking to try and work out. If its too much I just keep what I have, I wont swap to the bigger exhaust. Its been useful, I am now looking to check out the Hurricane headers which I forgot all about.

Cheers
 
Top