nitrous question, 240 shot
nitrous question, 240 shot ok heres the question, i have a heads and cam auto ss, 02. i monitor knock and have a wide band. i thought that 73 jets where a 175 shot so ive been using a 73/38 pills with an a/r of 12.3-12.5s for tuning. i run hp tuner so i monitor know and i dont get any. here the thing. i just found out that a 73/38 is a 240 shot. if my tune is on and no knock, plenty of fuel. what will break or what should i be worried about. the cars at 625-640 rwhp with that shot making 200 at the wheels. 
little advice.
be very careful of who you listen to when dealing with the upper levels of n20 usage.
check with locals running the same size hits, tuners.
contact the vendors here on this board, they wont steer you wrong.
your a/f is lean as hell for the shot size your running.
it appears that your system is running out of fuel.
jetting is pretty close, but the fuel system may not be up to the task.
put a fuel pressure gauge on that puppy.
shoot for 11.6-11.8 with that shot size in an ls1. even a little richer wont hurt.
be careful
have fun.
be very careful of who you listen to when dealing with the upper levels of n20 usage.
check with locals running the same size hits, tuners.
contact the vendors here on this board, they wont steer you wrong.
your a/f is lean as hell for the shot size your running.
it appears that your system is running out of fuel.
jetting is pretty close, but the fuel system may not be up to the task.
put a fuel pressure gauge on that puppy.
shoot for 11.6-11.8 with that shot size in an ls1. even a little richer wont hurt.
be careful
have fun.
Originally Posted by usd2sing
little advice.
be very careful of who you listen to when dealing with the upper levels of n20 usage.
check with locals running the same size hits, tuners.
contact the vendors here on this board, they wont steer you wrong.
your a/f is lean as hell for the shot size your running.
it appears that your system is running out of fuel.
jetting is pretty close, but the fuel system may not be up to the task.
put a fuel pressure gauge on that puppy.
shoot for 11.6-11.8 with that shot size in an ls1. even a little richer wont hurt.
be careful
have fun.
be very careful of who you listen to when dealing with the upper levels of n20 usage.
check with locals running the same size hits, tuners.
contact the vendors here on this board, they wont steer you wrong.
your a/f is lean as hell for the shot size your running.
it appears that your system is running out of fuel.
jetting is pretty close, but the fuel system may not be up to the task.
put a fuel pressure gauge on that puppy.
shoot for 11.6-11.8 with that shot size in an ls1. even a little richer wont hurt.
be careful
have fun.
Originally Posted by cjg454ss
my fuel system can keep up i know. i upped the fuel jet to a 40 and the a/f was in the 10.5 range. i think i will run the richer jet. i just wasnt sure if too rich like in the 10s a/r was bad.
much better bro. glad to hear it. most will agree. 11.5-11.8 on a 200shot area.
if your full tilt, forged and all big bang stuff it'll handle a little leaner but then u start playing with reliability issues.
10.5 is fat. too fat most will say. (i agree fwiw)
EDIT: here's something for ya.
dont worry about jet ratings vs hp.
pick a goal, find the jets for that rating and grap 2-3 jets lower for both sides. work you way up. call it a day when she is working well. toss her on the dyno for a base pull, then another pull with the juice. and leave it. it is what it is kinda thing. maybe 200, maybe 195 or whatever the other way.
just dont get to greedy with dyno numbers/bragging rights. motors arent cheap..hehehehe
Last edited by usd2sing; Jan 5, 2007 at 10:00 PM.
Originally Posted by usd2sing
much better bro. glad to hear it. most will agree. 11.5-11.8 on a 200shot area.
if your full tilt, forged and all big bang stuff it'll handle a little leaner but then u start playing with reliability issues.
10.5 is fat. too fat most will say. (i agree fwiw)
EDIT: here's something for ya.
dont worry about jet ratings vs hp.
pick a goal, find the jets for that rating and grap 2-3 jets lower for both sides. work you way up. call it a day when she is working well. toss her on the dyno for a base pull, then another pull with the juice. and leave it. it is what it is kinda thing. maybe 200, maybe 195 or whatever the other way.
just dont get to greedy with dyno numbers/bragging rights. motors arent cheap..hehehehe
if your full tilt, forged and all big bang stuff it'll handle a little leaner but then u start playing with reliability issues.
10.5 is fat. too fat most will say. (i agree fwiw)
EDIT: here's something for ya.
dont worry about jet ratings vs hp.
pick a goal, find the jets for that rating and grap 2-3 jets lower for both sides. work you way up. call it a day when she is working well. toss her on the dyno for a base pull, then another pull with the juice. and leave it. it is what it is kinda thing. maybe 200, maybe 195 or whatever the other way.
just dont get to greedy with dyno numbers/bragging rights. motors arent cheap..hehehehe
Originally Posted by cjg454ss
yeah that dyno will help. so you think a 10.5-10.8s a/r is too fat
imo. yep, just a we bit.
check with some of the tuners and THIS board's n20 vendors. they wont steer you wrong.
