I had nitrous lag, last year in 1&2 gear. I had my nitrous direct ported into the top of the manifold,nitrous fuel line was tied into the AEM fuel rail.Once I got in to 3 gear everthing was fine.Talk to NOS And was told to run the nitrous off it's own fuel pump and regulater.ANY ONE HAVE THIS PROBLEM?

 

How much nitrous do you plan on using?
I'm guessing that this is a single stage system?

 

No, I have had no lag problems at all. I ran a walbaro 255 pump which is will sustain a hell of alot of power. But I guess it depends on how much shot your running. I know some camaro guys running a similar pump (rated the same flow) pushing 250 shots with no problem, so I dont think it would have a problem pushing a smaller motors fuel needs. But I suppose if you run a big enough shot that you may need something begger.

Ive though about a 2nd fuel system, but that would only be too run race gas while I was spraying.

Hope that helps

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NXLude &raquo;</TD></TR><TR><TD CLASS="quote">Ive though about a 2nd fuel system, but that would only be too run race gas while I was spraying.

Hope that helps</TD></TR></TABLE>

a 1 gallon fuel cell and 2nd fuel system under the hood for nos would be a hell of a good idea...just got me thinking

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NXLude &raquo;</TD></TR><TR><TD CLASS="quote">No, I have had no lag problems at all. I ran a walbaro 255 pump which is will sustain a hell of alot of power. But I guess it depends on how much shot your running. I know some camaro guys running a similar pump (rated the same flow) pushing 250 shots with no problem, so I dont think it would have a problem pushing a smaller motors fuel needs. But I suppose if you run a big enough shot that you may need something begger.

Ive though about a 2nd fuel system, but that would only be too run race gas while I was spraying.

Hope that helps</TD></TR></TABLE>
I used the same pump! and i was using 110 race fuel already.I wonder since i tied into the fuel rail if that had someting to do with it.Nos thought it was robbing the fuel form the motor.

 

On my Miata I was having major lean issues when running only 1 aftermarket fuel pump and -8 lines.

I then installed a separate fuel system using all the stock lines/fuel pump and installed a separate regular for my Nitrous and tuning became I breeze.

Needed just a little more fuel.. Up goes the fuel presure..

Good Luck.. We are doing the same thing on our D series Civic, but all the parts will be aftermarket, unlike the Miata where I used the stock system for the N20.

 

you dont run 2 FPR's and pumps off your stock tank. soo ghetto.

You run a fuel cell, usually one gallon that you only use 100 Oc in, and basically have a dedicated fuel system for your nitrous system. Thats THE ONLY WAY to do a wet or direct port kit if you want it done 100% correctly. Otherwise its a hackjob.
ideally a real mans nitrous setup can cost as much as a turbo kit. The elaborate nitrous setup on one of my cars totalled up very close to $3k.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ls1 FD3s &raquo;</TD></TR><TR><TD CLASS="quote">you dont run 2 FPR's and pumps off your stock tank. soo ghetto.

You run a fuel cell, usually one gallon that you only use 100 Oc in, and basically have a dedicated fuel system for your nitrous system. Thats THE ONLY WAY to do a wet or direct port kit if you want it done 100% correctly. Otherwise its a hackjob.
ideally a real mans nitrous setup can cost as much as a turbo kit. The elaborate nitrous setup on one of my cars totalled up very close to $3k.</TD></TR></TABLE>

Who said he was running a stock tank?

 

My crx had the nos supply right off the end of the fuel rail as you are stating. Direct port and 80 shot. When I would engage the spray the fuel press would fall to 0 for a second. The car would bog then rip for the rest of the run. And I already had an 255lph intank pump. So I don't recomend but I put an msd inline pump and all is good . Even with a 120 shot. But the problem was when the fuel selonoid would open it would drain the rail . And thats no good. Even though I fixed it some day one pump could fail and I might not know it. Boom. Run a seperate fuel system.

 

/\ thats what happens when you shortcut it. You deplete the engine's fuel supply when the fuel noids open and bog city. then zoooooom

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2.0Coupe &raquo;</TD></TR><TR><TD CLASS="quote">My crx had the nos supply right off the end of the fuel rail as you are stating. Direct port and 80 shot. When I would engage the spray the fuel press would fall to 0 for a second. The car would bog then rip for the rest of the run. And I already had an 255lph intank pump. So I don't recomend but I put an msd inline pump and all is good . Even with a 120 shot. But the problem was when the fuel selonoid would open it would drain the rail . And thats no good. Even though I fixed it some day one pump could fail and I might not know it. Boom. Run a seperate fuel system.</TD></TR></TABLE>

there is no way that the fuel solenoid is going to drain the rail if you're running a 120shot.

the bog that you felt was probably because you needed to purge your nitrous line. i was spraying 120shot Direct Port and i had the same issues when i had low bottle pressure or when i didn't purge the nitrous line.

my set up:
Walbro 255 intank, stock fuel lines, aem rail, NOS Pro Fogger kit (Big Solenoids and lines). i used a 90deg elbow off of the fuel filter to feed the Fuel Solenoid.


Modified by Killer_B at 9:42 PM 3/9/2005

 

YES this is the same problem i am having.!
It was draining the fuel from the fuel rail...when the nitrous came on the car would almost try to die...then just take off.

AND I WAS USING A 120 SHOT

 

do u have a purge?
that extra fuel in the begining (without nitrous) will have the same effect

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSR-Abuser &raquo;</TD></TR><TR><TD CLASS="quote">YES this is the same problem i am having.!
It was draining the fuel from the fuel rail...when the nitrous came on the car would almost try to die...then just take off.

AND I WAS USING A 120 SHOT</TD></TR></TABLE>

if that were the case the motor would not last very long. a couple of passes at best. a lean motor on nitrous would blow.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Killer_B &raquo;</TD></TR><TR><TD CLASS="quote">

if that were the case the motor would not last very long. a couple of passes at best. a lean motor on nitrous would blow. </TD></TR></TABLE>

Well I only made 5 passes...here's the weird thing it was never lean,but run really rich..I pulled the plugs after ever run. and there were nice and black.

And no purge kit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSR-Abuser &raquo;</TD></TR><TR><TD CLASS="quote">

And no purge kit.</TD></TR></TABLE>

i think that is the problem..the fuel line will always have fuel in it to the selenoid..as soon as there is fuel pressure ..by the time the air is cleared in the nitrous line (to the selenoid) that fuel is already in the cylinder causing that bog in the begining..

 

^^^right, no purge will give you a nasty studder or lag every time....that pump will support alot of power, Id check the size of your lines and other avenues first. I know a million guys running a shot of your size with one pump and no problems

 

well when you run a seperate fuel cell under your hood as you stated? you are really taken a chance......you do not know when you are almost empty? yeah i know look in it.well when your racing you can forget the littlest things.


this is my set up?

3/4 deck plated 2.4L h22 w/t72 bb w/pro race fogger.

i run a 255 walboro in tank for the fogger set up,w/a adj. reg. "very very helpful"tuning tool.if i run lean. i up the fuel pressure and make another run.now for the turbo set up......i run a sx 1k hp pump.


my stock tank is sumped and runs a 10an feed and a 6an return,it also has it's own adj. reg.


when i do it like this i can see when it starts to get low,and i also have a sensor,that tells me if it is below a certain limit,if i get caught up in the mist of things.if that light is on....i will not spray untill the fuel level is past the point i have set w/the sensor.

 

It takes a while to run 1 gallon of fuel through a nitrous jet

 

i like the stand alone nitrous setup..but not for a 120..IMO is not necessary.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NXLude &raquo;</TD></TR><TR><TD CLASS="quote">It takes a while to run 1 gallon of fuel through a nitrous jet</TD></TR></TABLE>

probably just as long as it takes a set of 1600cc inj......to take down a tank of gas

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Killer_B &raquo;</TD></TR><TR><TD CLASS="quote">

there is no way that the fuel solenoid is going to drain the rail if you're running a 120shot.

the bog that you felt was probably because you needed to purge your nitrous line. i was spraying 120shot Direct Port and i had the same issues when i had low bottle pressure or when i didn't purge the nitrous line.

my set up:
Walbro 255 intank, stock fuel lines, aem rail, NOS Pro Fogger kit (Big Solenoids and lines). i used a 90deg elbow off of the fuel filter to feed the Fuel Solenoid.


Modified by Killer_B at 9:42 PM 3/9/2005</TD></TR></TABLE>


hey killer, i belive the car has a purge on it? any other explanation?

 

the studder that is felt when engaging nitrous can be numerous things anywhere from a purge, to a minute amount of improperly mixed nitrous and fuel entering a cylinder as a valve closes. it all adds up. remember our intake manifolds were meant to flow air NOT liquid, they have similar but very different properties throughout the spectrum.

yes for a fraction of a second, dependent upon size and location of a solinoid, it can cause a drop in fuel pressure, that is why it is recommended to be placed 12 inches from the rail. when "T"d in to the main line.

all of these factors come into play as do, bottle pressure, temp,nitrous quality, gas quality and so forth.


and just because there isnt a dedicated fuel system for the nitrous kit doesnt mean its a hackjob: GO BUY FUEL CELL, PUMP AND REGULATOR, show me that in any of the EFI nitrous kits directions?!?!?!?

asa matter of fact on NOS's web page it says: kits are designed to be used with stock pump, up to XX amount of HP

 

always a good idea in any nitrous car to run a dedicated fuel system for it

 

From NOS web page!