ctsfiveseven

Had my LS1 car dynoed last fall and I pulled 417NA, with stage 2 heads and 233/233 cam and Fast intake unported.

I had the 150 hp jets in and pulled 526 AF was right on 11.8-12.0 with 6* of retard. I didn't get a good reading on the torque cause of the noise but how normal is this not to pick up the full 150. The only reason I ask is cause my brother has a larger cubed motor and we dynoed that today same kit and he picked up the full 150 on the nuts!!

My heads are not the best flowing would that be holding me back? We fattened it up leaned it out more playing with the fuel side jets and it wouldn't budge off that 526. I run a 1 3/4 header and a single cut out. Plenty of fuel 1000psi nitrous.

Is there anything I am missing or are these gains typical? I noticed the plug gap was off at around .40 when I checked them when I get home. I think I had them at .36 when I put them in 3 years ago, so there probably wore I am going to put a new set in @ .32 see if that will help a bit incase it's blowing out the spark.

bigtls1

iTrader: (7)

i would put the spark plugs in too.
Also, is your car stick or auto? auto tends to lose a little bit more through the drivetrain than manual.

built408

iTrader: (10)

3 year old spark plugs??????

ls2 bait

iTrader: (11)

147rwhp on the 150
205rwhp on the 200

mike c.

iTrader: (1)

I only gained 137hp from my 150 t.n.t shot on my 346ci. My bottle was at 900psi during this run. m6 car w/ngk tr6 plugs.

pyro719

iTrader: (5)

I picked up 160rwhp with a nitrous outlet 52mm plate

VTC_WS6

iTrader: (9)

98rwhp on a 100-shot through Dave's 78mm plate (on an ultra-conservative tune).