GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

1" 3/4 or 1" 7/8 Primary's

Thread Tools
 
Search this Thread
 
Old 09-13-2010 | 09:09 PM
  #1  
bgray's Avatar
Thread Starter
TOTM: June 2007
iTrader: (2)
 
Joined: Nov 2006
Posts: 1,781
Likes: 7
From: Hamilton, Ontario
Default 1" 3/4 or 1" 7/8 Primary's

Building my heads and cam 6.0, 243 prc stage 2.5 heads. ls7 lifters, cam going to be around 230-233/237-240 with a 112lsa

questions is Im going to junk my pacesetters and put a hole new exhaust on it. Pacesetters are 1" 3/4 and 3" collector, and im looking at repalcing them with the same size Lpp or some ARH 1" 7/8 and 3" Collector...ARH is what I have on my Silverado DD, and seem a bit overkill

SO QUESTIONS....With the LPP sizing be suitable for a 425rwhp 6.0l or will i be robbing some horsepower with the smaller primary's? Ive heard great things about the LPP and y pipe, So i was very Interested in them and a great option for saving 700$ over the ARH setup...

whats everyones thoughts

Last edited by BlackGMC; 09-13-2010 at 09:41 PM.
Old 09-13-2010 | 09:27 PM
  #2  
skeet's Avatar
TECH Junkie
iTrader: (18)
 
Joined: Feb 2007
Posts: 3,157
Likes: 2
From: P.A. TX
Default

1 7/8s or even some stepped headers, you build it right you'll need them, specially with a 3.5 collector..

what intake you planning on using?
Old 09-13-2010 | 09:48 PM
  #3  
bgray's Avatar
Thread Starter
TOTM: June 2007
iTrader: (2)
 
Joined: Nov 2006
Posts: 1,781
Likes: 7
From: Hamilton, Ontario
Default

Just the factory truck intake for now, later upgrade to a fast setup and tb
Old 09-13-2010 | 09:55 PM
  #4  
brent5631's Avatar
TECH Resident
iTrader: (7)
 
Joined: Nov 2006
Posts: 862
Likes: 1
From: Dallas
Default

If i had the coin i'd go with ARH just because they are better headers.
Old 09-13-2010 | 09:56 PM
  #5  
skeet's Avatar
TECH Junkie
iTrader: (18)
 
Joined: Feb 2007
Posts: 3,157
Likes: 2
From: P.A. TX
Default

actually doesnt matter which intake, its just my opinion i would go no less than 1 7/8s
Old 09-13-2010 | 10:33 PM
  #6  
1slow01Z71's Avatar
Tin Foil Hat Wearin' Fool
iTrader: (36)
 
Joined: Oct 2004
Posts: 23,204
Likes: 4
From: Austin, TX
Default

The kooks fbody headers will work for your truck since its 2wd
Old 09-13-2010 | 10:39 PM
  #7  
bgray's Avatar
Thread Starter
TOTM: June 2007
iTrader: (2)
 
Joined: Nov 2006
Posts: 1,781
Likes: 7
From: Hamilton, Ontario
Default

Are we talking a big difference between the two that these power levels?
Old 09-13-2010 | 10:58 PM
  #8  
skeet's Avatar
TECH Junkie
iTrader: (18)
 
Joined: Feb 2007
Posts: 3,157
Likes: 2
From: P.A. TX
Default

Originally Posted by bgray
Just the factory truck intake for now, later upgrade to a fast setup and tb
this is what i'm feeding off now, you have a plan for the future so why cut yourself short now?

so whats wrong with the PS's now? i would deal with them until i had the coin to do the intake and tb then move onto bigger and better headers do all this and it will make a world of difference
Old 09-14-2010 | 11:42 PM
  #9  
GMCSIERRA5.3's Avatar
TECH Enthusiast
 
Joined: Sep 2010
Posts: 569
Likes: 3
From: Houston tx
Default

will u sell your pacesetter headers??? and are they the black or ceramic
Old 09-14-2010 | 11:44 PM
  #10  
budhayes3's Avatar
PT's Slowest Truck
iTrader: (19)
 
Joined: Apr 2004
Posts: 17,863
Likes: 2
From: Hackensack, NJ
Default

I'd go with the 1 7/8 ARH's



All times are GMT -5. The time now is 12:39 AM.