ZEX DRY NITROUS-HOW DOES IT CONTROL FUEL PRESSURE - Nitrous Oxide Forum

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ZEX DRY NITROUS-HOW DOES IT CONTROL FUEL PRESSURE
Tuesday, December 05, 2006 8:44 PM


AUTOTRANS DOWNSHIFT ON NITROUS
Tuesday, December 05, 2006 8:49 PM
be carefull hitting dry nitrous on wot switch when cruising with autoshift. downshift takes long enough to pile up nitrous in intake giving a lot larger dose than expected. my engine is now trash
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Tuesday, December 05, 2006 9:11 PM
chris donaldson wrote:

be carefull hitting dry nitrous on wot switch when cruising with autoshift. downshift takes long enough to pile up nitrous in intake giving a lot larger dose than expected. my engine is now trash




you are completely 100% wrong. nitrous doesn't "pile up" and even if i could it wouldn't because of a downshift..... nitrous sees its either at WOT or its not, if your at WOT and its spraying the nitrous doesn't build up in the manifold and wait for the downshift to finish then go in the motor, if the throttle is all the way its spraying and the engine is sucking it in weather your downshifting or not.



Re: AUTOTRANS DOWNSHIFT ON NITROUS
Wednesday, December 06, 2006 11:22 AM
Hey. if your cruising at 1,500 rpm hit the gas and it takes a full second to downshift then obviously your injecting it at way to low of rpm. that is up until it down shifts. when it kicked down I heard 2 pops. 2 holes in block. pile up in intake wasnt what i meant sorry
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Wednesday, December 06, 2006 2:17 PM
a better idea would have been to wait until it downshifts then go full throttle. Or go full throttle let it downshift and hit a switch.
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Wednesday, December 06, 2006 6:11 PM
or get a proper safe seup with a sindow switch which would have completely prevented the problem



Re: AUTOTRANS DOWNSHIFT ON NITROUS
Thursday, December 07, 2006 9:12 AM
chris donaldson wrote:

Hey. if your cruising at 1,500 rpm hit the gas and it takes a full second to downshift then obviously your injecting it at way to low of rpm. that is up until it down shifts. when it kicked down I heard 2 pops. 2 holes in block. pile up in intake wasnt what i meant sorry


they make window switches for a reason dude.

you shouldn't be spraying that low of an rpm anyway



Im a Xbox 360 fanboy...and damn proud of it!!
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Friday, December 08, 2006 6:55 PM
do most people run a window switch on an automatic tranny?
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Saturday, December 09, 2006 10:29 AM
i do



Im a Xbox 360 fanboy...and damn proud of it!!
Re: AUTOTRANS DOWNSHIFT ON NITROUS
Saturday, December 09, 2006 12:26 PM
i just figured since you dont lift off of gas at shift points it will still be at wot and shouldnt be a problem. I dont know what rpm its at after shifting but it should be high enough.
Re: ZEX DRY NITROUS-HOW DOES IT CONTROL FUEL PRESSURE
Saturday, December 09, 2006 2:24 PM
Back on topic..

There's a vacuum line that (stock) goes from the fuel pressure regulator to the throttle body. You take off this line, and replace it with two lines... from ports on the ZEX control box to each spot. The ZEX control box cuts the vacuum on the FPR, boosting your fuel pressure. It's a pretty simple way to control it, actually.... works, until you hit the max speed at 108 mph, and the fuel cuts off. Then your engine goes boom.. but that's another story...






Re: ZEX DRY NITROUS-HOW DOES IT CONTROL FUEL PRESSURE
Wednesday, December 13, 2006 3:36 PM
Actually the Zex kit is designed to bleed a small amount of the bottle pressure to the FPR to raise your fuel pressure. The stock FPR is a 1:1 ratio, meaning it will raise fuel pressure 1 psi for every 1 psi of possitive pressure it sees.


- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.

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