Spraying

02GTPman · #1 05-23-2007, 06:58 PM

Hey i have a 02 grand prix gtp running 2 1/2 inch downpipe to exhaust a 3.325 pully intake dhp v.1 and a 55 shot of spray any idea why when ever it does to shift i missfire? it is hooked right into my intake in the soft rubber part and its hooked up so its a full throatle kinda spray

GTPpower · #2 05-23-2007, 09:11 PM

Do you have a wet or dry system?

02GTPman · #3 05-23-2007, 11:57 PM

its a dry shot

BNaylor · #4 05-24-2007, 10:07 AM

Your installation is most likely the cause. You want the spray behind the MAF sensor. There are kits to do the job properly. See link below.

Click here

Do you have a reprogrammed PCM module or are how are you tuned for nitrous since no mention of a powertuner?

02GTPman · #5 05-24-2007, 01:23 PM

I am not tuned for nitrous i just have the Digital horsepower Version 1 in there I dont know of any tuning places near me i live in Baltimore MD

BNaylor · #6 05-24-2007, 01:34 PM

What brand NOS kit do you have? Although the dry spray systems are designed to spray at or before the MAF many GT(L36)/GTP(L67) owners run into problems because of the way the MAF is designed into the throttle body. It is different with a MAF installed outside of the throttle body in the intake ducting like LS1s. The fuel supply has to be enriched. So the time proven work around is to spray after the MAF but the TB kit and tuning is required unless you are running like a Zex system with auto management which should enrich fuel automatically for you. I would be very careful and monitor knock retard (KR) to see what level it is at when spray kicks in.

02GTPman · #7 05-24-2007, 01:56 PM

Funny thing is i do have the Zeks kit heh where it only engages when i am full throttle

BNaylor · #8 05-24-2007, 02:08 PM

Quote:

Originally Posted by 02GTPman

Funny thing is i do have the Zeks kit heh where it only engages when i am full throttle

Thats good. Best dry NOS system to use on a L67. I'm quite sure the work around will be the TB kit. It is designed to work with the Zex kit aka Smart nitrous system that people decide to get. Checkout 3800Performance.com.

Quote:

***NOTE:
For those owners with supercharged vehicles, we also offer the Thrasher Nitrous Oxide Installation Kit. We highly recommend this spacer with it's threaded port, as it allows installation of the nitrous jet behind the throttle body, so nitrous is not sprayed onto the MAF sensor.

Click here for more

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