HP missing with g5x2 cam
Thread Starter
On The Tree
Joined: Jan 2003
Posts: 126
Likes: 0
From: nj
HP missing with g5x2 cam dyno tuned today, and my #'s ended up being 426.8 rwhp and 381.6 rwtq
mods are g5x2 cam and patriot stage 2 ls6 heads UD pully full exhaust with gutted cats and a twin flow intake. Stock TB and car already came with ls6 block and intake. what to try? tq seems real low.
parts to try/ swap:
vararam instead of twinflow
straight pipes vs gutted cats
cooks headers vs TPIS
ported throttle body maybe?
planned mods are mezire H20 pump and fast intake, and AFR heads, but waiting on #'s for those first.
I would like to make atleast 445-450rwhp with these heads first before I do the new mods. I know its a big power producing cam and people have achieved 420's with cam only, i cant believe the heads aren't giving me any extra power
any suggestions where my #'s are ....TQ especially!
mods are g5x2 cam and patriot stage 2 ls6 heads UD pully full exhaust with gutted cats and a twin flow intake. Stock TB and car already came with ls6 block and intake. what to try? tq seems real low.
parts to try/ swap:
vararam instead of twinflow
straight pipes vs gutted cats
cooks headers vs TPIS
ported throttle body maybe?
planned mods are mezire H20 pump and fast intake, and AFR heads, but waiting on #'s for those first.
I would like to make atleast 445-450rwhp with these heads first before I do the new mods. I know its a big power producing cam and people have achieved 420's with cam only, i cant believe the heads aren't giving me any extra power
any suggestions where my #'s are ....TQ especially!
Originally Posted by robiferretti
dyno tuned today, and my #'s ended up being 426.8 rwhp and 381.6 rwtq
mods are g5x2 cam and patriot stage 2 ls6 heads UD pully full exhaust with gutted cats and a twin flow intake. Stock TB and car already came with ls6 block and intake. what to try? tq seems real low.
parts to try/ swap:
vararam instead of twinflow
straight pipes vs gutted cats
cooks headers vs TPIS
ported throttle body maybe?
planned mods are mezire H20 pump and fast intake, and AFR heads, but waiting on #'s for those first.
I would like to make atleast 445-450rwhp with these heads first before I do the new mods. I know its a big power producing cam and people have achieved 420's with cam only, i cant believe the heads aren't giving me any extra power
any suggestions where my #'s are ....TQ especially!
mods are g5x2 cam and patriot stage 2 ls6 heads UD pully full exhaust with gutted cats and a twin flow intake. Stock TB and car already came with ls6 block and intake. what to try? tq seems real low.
parts to try/ swap:
vararam instead of twinflow
straight pipes vs gutted cats
cooks headers vs TPIS
ported throttle body maybe?
planned mods are mezire H20 pump and fast intake, and AFR heads, but waiting on #'s for those first.
I would like to make atleast 445-450rwhp with these heads first before I do the new mods. I know its a big power producing cam and people have achieved 420's with cam only, i cant believe the heads aren't giving me any extra power
any suggestions where my #'s are ....TQ especially!
Originally Posted by robiferretti
full exhaust with gutted cats and a twin flow intake. Stock TB and car already came with ls6 block and intake. what to try? tq seems real low.
Got a dyno you can post with air/fuel?
Trending Topics
TECH Fanatic
Joined: Mar 2002
Posts: 1,421
Likes: 0
From: Your Reality Check Bounced...
Werd...get real headers, a ypipe and a high flowing exhaust...or get a nice corsa for street and for dyno/track get a 3" cutout...I produced similar numbers w/my Macs, ory, and corsa...made 415hp 405tq w/stg 2mti heads and x1, put on a cut out and went 436 and 420rqtq...u have to let these motors breathe on the exhaust side or your just wasting money and hp.....period.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
i cant believe the heads aren't giving me any extra power
Originally Posted by robiferretti
I have TPIS long tubes gutted stock main cats magnaflo x-pipe and corsa indies
Thread Starter
On The Tree
Joined: Jan 2003
Posts: 126
Likes: 0
From: nj
Originally Posted by bspz28
You had an import shop tune your car 
Last edited by robiferretti; Jan 22, 2004 at 05:35 PM.
TECH Apprentice
Joined: Jul 2003
Posts: 316
Likes: 0
From: bronx ny
Sorry, but the post should read HP missing with patriot ls6 heads, you can hear every exuse from the patriot pushers but what it comes down to is they are over rated and dont perform, How many posts do we have to read about disapointed dyno and track results. here is a link to another post with 6 different cars all with dissapointed results
https://ls1tech.com/forums/dynamometer-results-comparisons/118174-obsssd-s-pp-stg-ii-ls6-g5x3-dyno-graph.html
I know now everyone will say Im an *** clown and dont know what Im talking about but put 2 and 2 together people. There 5.3s are a good head for the price but be suprised with lower than average dyno's. I guess you get what you pay for. I feel you would hve made more power with a set of stock ls6 heads and I think alot of people would agree. Not a bash just a good educated guess
https://ls1tech.com/forums/dynamometer-results-comparisons/118174-obsssd-s-pp-stg-ii-ls6-g5x3-dyno-graph.html
I know now everyone will say Im an *** clown and dont know what Im talking about but put 2 and 2 together people. There 5.3s are a good head for the price but be suprised with lower than average dyno's. I guess you get what you pay for. I feel you would hve made more power with a set of stock ls6 heads and I think alot of people would agree. Not a bash just a good educated guess
Originally Posted by robiferretti
No George Benson tuned my car, this is a shop where we were able to rent the dyno by the hour.
George did the same cam with stock ls6 heads and the mezire water pump and got 436/407ish with stock heads
George did the same cam with stock ls6 heads and the mezire water pump and got 436/407ish with stock heads
George did the same cam with stock ls6 heads and the mezire water pump and got 436/407ish with stock heads