ls1blazer

iTrader: (6)

The engines is a iron 6.0(.030 over) , weisco flatops w/l92 relief , WCCH cnc l92 heads milled .045 , l76 intake , ls7 head gaskets, 226/232 .609/.604 113 lsa, 1 3/4 longtubes, no cats (true duals), t56 trans.

It only made 400rwhp / 383rwtq with a tune . It seems a little low to me. Any sugestions?

ls1blazer

iTrader: (6)

no help?

the_merv

iTrader: (88)

What was the RPM's that you spun it too? What was the peak RPM's it made that at?
It's a 370ci Engine, what's the Compression Ratio?

CBIII

iTrader: (6)

my similar build (408) did 426/427. I was pissed. MY heads/cam/exhaust are all too small and my tune is off though. I imagine you need to look at your tune and new cam.

the_merv

iTrader: (88)

^^What H/C Combo are you running?

CBIII

iTrader: (6)

massive ported 5.3s (2.065/1.55 valves, flowed 319@600 and 298@500) and TSP 231/237 cam, vengeance racing ported 92/95mm REVX TB, 1 3/4lts/ory/bullet m6/10bolt.

also, was done on a dynomite dyno.

PREDATOR-Z

What was the dyno? Mustang/dynojet etc..
What is your diff?
Size tire?

BTW pistons are Wiseco

66deuce

iTrader: (1)

i would look at your tune first to make sure everything is right..those L92s like more timing thrown at them than the LS1/2/6 heads..
there's a couple of guys on here that have a lot of experience with L92 builds.Edcmat is one,i think that's how you spell his screen name..he's a sponsor on here..

ls1blazer

iTrader: (6)

dynojet, 10 bolt 4:10s, 275/40/20

ls1blazer

iTrader: (6)

6200 rpms , I can't remember the peak rpms , 10.5:1

Gen414

iTrader: (38)

Seems like cam is a little on teh small side with the duration, but really should not be the whole problem, should have made more still. Look at tune, and when you think you have looked at all the small stuff, look again. What was AF ratio? Plugs? Fuel pressure? Throttle body size? Is it opening all the way?New motor/just together? New combo? Old combo, new problem???

the_merv

iTrader: (88)

The Duration is good..right in the area of most of the ones in that range..

ls1blazer

iTrader: (6)

I physically looked at the tb and it only opens 83% but I was told this was normal by HP tuners with the trailblazer and ssr programs(the one I'm using with the ls2 tb) . f/p is fine, plugs are fine(tr6/.35),A/F ratio is 12.8-13.0 at wot. I even put the maf directly on the tb to see if the air intake was restricting the flow.