heres the dyno plot

the blue is spray

http://www.cardomain.com/memberpage/423954/6

now some background

im spraying a 125 wet on a N O S big shot kit

.57 nitrous
.51 fuel obvouisly way to big although was fine up untill removal of the seliniod filter

ive got a heater and the bottle pressure was around 950

ive gone through about 5 bottles and everythings been cool

today right before i went to the dyno i removed the filter before the seliniod because a guy that helped me tune it alittle said i didnt need it and it would restric fuel

well lets just say it restrickted alot of fuel so now i need a much smaller jet but my main question here is why does the car go so lean for the first few hundred rpms of spray

 

Where did you get the jet info?

According to my calculations you should be using around .32 fuel jet with that .57 nitrous.

 

i went out to my friends house last week who has a wideband and we started out with a 44 fuel to be on the safe side but it was lean so we kept working our way up till it was all good

yeah i know i need a much smaller fuel jet now but like i said the tune was much better when i had the seliniod fuel filter on it must of just been ristricting alot of fuel

my question is more on is it normal for it to go way lean for the first few hundred rpms

 

Yes its normal. I don't even bother checking the a/f until its over 4k you only spend a fraction of your time there in 1st gear. Its also normal for it to go rich or lean when shifting.

 

thankyou very much jime thats exactly what i needed to know and now i will get some much smaller jets around .32 and tune it again

 

Don't mean to hijack this thread, but I dynoed my 75 shot on my 2k2. It put out 252 to the wheels, exactly a 50 hp increase from the baseline dyno numbers taken a few numbers before. Any suggestions Jime?

 

What kit? NX has always given me higher than advertised HP. Gotta run the bottle pressure at 1050 or so as recommended though.

 

it was the 20923 kit, bottle pressure was at 1050, the tq increase was pretty cool however ,104tq gained to 339ft/lbs. Could it be FP? The jetting guide shows the FFP at 43, where I'm showing 52 on my FPG.

 

Hmmm. Not sure what it is. I only did a dyno once with my 4th Gen. I am not a dyno believer. To me the 1/4 is my dyno.

 

hmmmm. Time to call NX and see what they say, if they have any ideas. I'm happy with my gains, now I just need traction for the track. High times, but high traps last week. Well compared to what I did on motor, I need to inves in some DRs.