here's my numbers. made 5 runs.

slp airlid, cutout closed
291.35 rwhp
296.64 rwtq

cutout open
303.42 rwhp
309.53 rwtq

200 n2o cutout closed
426.57 rwhp
517.84 rwtq

200 n2o cutout open (didn't get printout)a/f ratio way under 10
441 rwhp
528 rwtq

200 n2o cutout open lean fuel side 3 jet sizes a/f ratio 11:1
442.05 rwhp
522.89 rwtq

 

Nice! Stock shortblock or no?

 

all stock except for SLP airlid and cutout. click the 00 formy in my sig.

 

good numbers but I think you are asking for trouble running a 200 shot on a stock ls1

 

I think your having problems with that 200 shot is not matching up on the dyno runs which gain 140rwhp, but did very good on the rwtq gain over 200. Which system are you using?

Vinny

 

Good stuff!! I'm gonna throw 150 at the ole' LT1 as soon as I get a walbro fuel pump......as far as 200 on the LS1, from what I've been reading about them, and what my friends that have them say; I say have at it!

 

compucar nitrous. no problems with it at all. the problem lies in the exhaust system. stock manifolds flow pretty well. but, there are limits to how much they can flow. torque is easy to increase. it's at the lowend of the rpms. horsepower isn't as easy to achieve. because it's at the high rpms. if i added headers, i'd get the full horsepower of the 200 shot. when i did the 150 shot, i got the 125/125 it is supposed to do. still within the limits of the stock manifolds.

 

i guess i'm just a little more brave than most. or i give more credit to stock parts than others do. this is my 5th car i've run n2o on. the last one was a 86 TA with cast pistons and all stock internals. never had a problem with it. and i've ran that motor pretty lean.

 

I hope everything foes well. The ls1's like to stretch head bolts. I have seen it twice with stock motors and 175 shots

 

thanks for the warning. i'll keep an eye out for sudden overheating issues.