taqwache

well, to start off, i went with a more agressive nitrous tune on it. i leaned out the PE/RPM tables a little bit and backed the timeing off to 22 degrees to compensate for it. i also went ahead and put in 3 gallons of 99 octane for a little bit more safty. first run off the trailer NA with the nitrous tune was a very slower 12.04 at 115. with the NA tune i have done 11.80s last month. that was ok with me because i did not have the laptop at the track to change to the NA tune. anyways, once i opened the bottle up i remembered i forgot to fill it and the pressure was only at 850!!. i ran it anyways and got a 10.75 at a way faster 132mph. my previous time was a 10.83 at only 128. i should of launched of the bottle but i decided not to. the 60ft was only 1.86. on my second run, i really did not have enough bottle pressure but i wanted to see how it would hook on the spray so i ran anyways. i launched on it and got a 1.66 60ft. after that the car slowed way down so i just let off and ran a 11.00 flat. bottle pressure after the run was at 650 i was pretty happy eather way. i am sure that it gots more in it once i get a good run off of it.

badass 2002 z28

iTrader: (5)

200 shot?

383LQ4SS

iTrader: (33)

Sounds damn good. Get it all together and you should be running some awesome times.

taqwache

soon, once i get a good run on the 150 first. then i will jet it up a bit

taqwache

cool man. hey let me ask you a question. on your nitrogen push system, how do you know when the bottle is empty? also considering my bottle pressure was down, would i be able to get the very last bit of the spray out of it like this.

Navy David SS

iTrader: (13)

Nice times. I bet you don't forget to fill the bottle again. I have 2 bottles both are empty right now. Track is closed. Oh course this weekend is cool, dry and high bromo. What was your DA? Better air than last time? 10.75 is cool. The 132mph is awesome. Full bottle, good air, Mid 10's are within your reach.

What do you normally run your bottle at? I have yet to squeze out more that 925 on mine.

Good luck

David

TA2SLOW346

iTrader: (3)

How do you gain 17mph from 150 shot and only 850psi???? Somethings not right. With only 850 psi in the bottle and 150 jets i would only expect to see 12-14mph gain from the bottle MAX. What are the numbers on the jets?

taqwache

thanks man, i did not know the DA but it was at san antonio raceway on a cool night. 70s maybe low 80s not sure. defenently good raceing weather. i usually run the bottle a 950 or so. hopefully i will be able to go back once i install a cage.

hey dave, i was noticeing your new timeslips and notice that it seems you are getting pretty good 60s and 1/8th mile times. what gear stall and tires are you running. i am asking because i cant 60 or 1/8th my car worth a crap compared to most LS1 running simular times. it seems like my car does not wake up in till 3rd gear. then it feels real strong.

taqwache

not sure but it might be the gears. i am only running 3.73s right now on the TH400. my launches have always been pretty weak but that 3rd gear fills real strong. that might be why. the jets are N20/62 and fuel/35. according to Nitro Daves, that is a 150 shot to the wheels. i have the 200 jets here but people say my fuel system will not handle it so i dont take any chances just yet. oh yea, also remember that i ran NA on the nitrous tune. when i have my NA tune in it (28 degress and a pretty lean PE/RPM), i can trap 118 and run 11.80s easy. that is probably the main reason honestly. I was going to try the 200 and then the 250 once i get dual pumps and fatter fuel line.

1QWIKZ

iTrader: (6)

its a secret ..good runs steve..

383LQ4SS

iTrader: (33)

Yes...with the nitrogen push you will get the same performance from first run to last run.

As far as running out...I havent yet. I alwasy estimate how many runs I think I can make...and if there is a question...pull the bottle out and weigh it or atleast try to feel if its near empty. I have done this so much I can usually tell when Im at 2-3 lbs in my 15 lb bottle by feel. At that time its time to swap bottles.

As far as gaining 17 mph on a 150 shot with low bottle pressure. Those jets may be rated at 150...but his car may be a bit more efficient and getting another 10-15 hp. Also...dobt forget he lost some MPH by going to his nitrous tune so the differential will be greater.

Those jet sizes are just a general rating. Thats why I always dyno my car with as much data as possible and mark my own jets for what HP they really are. I even drill my own jets.

taqwache

thanks for the info man. your right on the jet sizes, i havent dynoed it so i really dont know how much power the jets are getting me. all i know is that it seems to have more power on the top end of the track then the first 1/8 mile comparing it to other LS1s. it might be eather the converter which is kind of tight or my gearing. eather way i kind of like it