I've read that it is recommended NOT.

I understand that it will deliver an insane torque boost and at lower RPMs this torque boost would be horrible on the motor.

I have a built motor with 9.0:1 CR, etc...

It is currently NA, but a turbo kit is in the mail. With the turbo, I still won't have a low end. That being said I want to kick up the low end with a 50 shot to get it rollin quick. AWD so traction won't be as big of an issue as getting the thing rolling from the get-go.

That being said, can a 50 shot be sprayed at a launch? I'm not sayin 1500-2000 RPM, I'm talkin about a 3k-4k launch... no?

 

Eh I wouldn't think so. Even if you're built that would be a lot of stress, but I don't know, I've never seen a driver do that so I'm assuming its not a good idea.

 

I've launched out of 1st gear with Nitrous once.....ok twice. But it was a dangerous move on my part. But when I catch traction....the torque is insane!

 

yeah ,you can do it but use an rpm window switch to control the first stage set at 500 rpm above launch rpm and hang on.nitrous is rpm dependent, not gear dependent so the big issue is having bottle control for that very small window before you shift.

 

+1. Dynotune nitrous makes one (and manufacturers the same one for Zex - which costs more). Very good programable switch that also has gear lockout.

50 shot off the line is fine. Just be ready to slip that clutch or you'll just spin.

 

Click Me

 

I always spray out the hole w/ my 150 shot.

This is with drag radials, too!

 

nice nitrous numbers.....I did 366whp/438wtq on 150 shot.

 

you can also go with a proportional controller.... but they suck

 

maximizer owns....

 

I have Utec... will that be sufficient??? I've read it has a programmable window. And I totally see what you mean now about 500 rpm above launch so that it kicks in JUST AFTER launching instead of off the line. Thanks for the suggestion(s).

Glad you guys contradict the common myth of not launching with N20 (low RPM).

 

they are acually all pretty good , but they chew up soleniods and the proportional timer part is still normal but your nitrous is stuck on.

 

you have to launch on nitrous !!! thats the only way to launch...

 

I know the Z's have weak CRs however u stated u have aftermartket ones so u should be ok squeezing in low RPMs.

I squeezed a few times outta the hole, with DRs on, and would still spin like a bi tch, if u have a utec i would recommand getting the timing pulled and set it up as a window switch

-Frank

 

I was wondering the best way too. I'm a N2O noob and will be getting my kit in a few weeks for my 5AT. From what I read, its extremely bad to arm it at say a red light and floor it when it turns green. So do I just go till im at 3k rpm then arm? Suggestions would be awesome. =]

 

Either use a computer management that runs the nitrous, or use a Window Switch that only lets it engage between an RPM range that you set. That way you can arm it anytime, but it won't activate until you reach the minimum RPM that you set. I have my Window set for 3500-6300, that way it doesn't slam a bunch of torque at lower RPM's, and it shuts off before I hit the rev-limiter. Hitting the rev-limiter is bad with nitrous because it reduces fuel flow to keep RPM's down, which means to much nitrous in the cylinder. Boom!

 

better tires is whats needed with nitrous..

 

LOL!
Especially if we had your sweet a$$ set-up!
Not all of us have a 10-second rockets.
Plus he said he has a 5AT, so I don't think he'll be launching like a manual.

 

Easy to calculate torque from jet size vs rpm.

100 hp jet at 6,000 rpm will be 5252/6000=0.875 x 100= 87 lb/ft

At 3,000 it will be twice or 174 lb/ft
At 2,000 it will be 3x or 262 lb/ft
At 1,000 it will be 6x or 600 lb/ft
At 650 rpm it will be 6000/650=9.23 or 923 lb/ft.

Assumming there is enough fuel to react in the same ratio as at 6,000 rpm.

Nitrous is a constant VOLUME spray per second once the full flow is established.

 

exactly, we wont ever install a system that comes on less than 3000 rpms on a customers car unless its a built motor, a highway pull in 5th or 6th gear and hit a 100 shot at 2000 rpms and its over.



i had a G35 sedan 5AT in 2004 and i always sprayed in first gear at the track, street or wherever. spraying in first gear actually knocks A LOT of time off your quarter mile. the stall will slip until 2800 (roughly) on a stock 5AT so there is nothing to worry about. make sure the nitrous comes on at 3000 or higher