Think I need to add another fuel pump
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From: Barto PA
Think I need to add another fuel pump You deside. As of now I have lucas 42.5 injectors running at like 90psi at wot. I know I know. Need to change regulators. Anyway It saying its lean up high with 7psi does that mean I need more push from the pummps or are the injectors maxed. I wouldnt think the injectors would be. I'm pretty sure I'm nowhere near 600rwhp yet. I know by running that much psi Im way out of the fuel pumps range. If you guys think I should add a line line pump which one would you guys get?
Thanks
Thanks
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From: Las Cruces, NM
Re: Think I need to add another fuel pump Remember the higher pressure you run, you actually will lower the output of the pump. You still have the Incon pump in there cool28, if so its a walbro 340. The 340 should be good to around 500 hp if you are using 58 psi base with a then increasing 1:1 with boost. Its way way less than that at 90 psi. So get that fixed and see how it goes.
Gary
Gary
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Tire Smoking Tranny Blowing Director
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From: Barto PA
Re: Think I need to add another fuel pump Well I had a lean code and my lterms are maxed at 25%. I have a afteer market regulator in there. It was pose to be a 2to1 but looks like it more like a 3to1 lol. all be it no autotap numbers.
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From: Las Cruces, NM
Re: Think I need to add another fuel pump cool28, which regulator are you using. Are you using the big aeromotive regulator instead of the one that came with the Incon kit originaly. If so it has to be hooked up to boost instead of vacuum. If its hooked up to vacuum it will be 2-3:1 instead of 1:1.
Gary
Gary
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From: Las Cruces, NM
Re: Think I need to add another fuel pump You have to hook it into the "butt pipe". They had to hook the small regulator into vacuum because it would not work at all when hooked to boost. Once you do that the regulator should be 1:1. I mentioned this to you in a past thread about 3-4 months ago. Then you should try putting your base pressure back to 58 so it will run better. With the large aeromotive reg it should rise instead of the crap you get with the small aeromotive reg.
Gary
Gary
Re: Think I need to add another fuel pump if you hook it up to the butt pipe then the fuel pressure will skyrocket when you let off the gas under boost. it needs to be from a manifold source BEHIND the throttle body.
you are not running out of fuel pump until the pressure DROPS. if the pressure is fine and you cannot richen then it is the injectors.
richen it up with a maft or edit.
you are not running out of fuel pump until the pressure DROPS. if the pressure is fine and you cannot richen then it is the injectors.
richen it up with a maft or edit.
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From: Las Cruces, NM
Re: Think I need to add another fuel pump The butt pipe is were Incon says to hook it up, no personnel experience at this point, since I still dont have all my kit. Even when hooked up to the butt pipe the fuel pressure should only spike by a couple of pounds when the throttle blade closes. Its sorta along the same reasoning why the Incon kits dont need BOV. Low boost and the fact that turbos are light weight so they spin down very quick once you are out of throttle.
Either way the fuel pump output drops off as you increase pressure. Also the pattern (atomizing) on the injectors will get rough at that high of pressure also.
Hopefully in the next few months I will have more hands on experience with the setup, so I can be more helpful.
Gary
Either way the fuel pump output drops off as you increase pressure. Also the pattern (atomizing) on the injectors will get rough at that high of pressure also.
Hopefully in the next few months I will have more hands on experience with the setup, so I can be more helpful.
Gary
Re: Think I need to add another fuel pump well if that is where incon says to put it in front of the tb then take it up with them, because that is wrong.
either way, you are not running out of fuel, your tuning is just off or you have a bad injector(s)
those lucas injectors do not respond well to quick increases in pressure, i read this on the incon forums. if you have the option try a set of ford 42#'s.
either way, you are not running out of fuel, your tuning is just off or you have a bad injector(s)
those lucas injectors do not respond well to quick increases in pressure, i read this on the incon forums. if you have the option try a set of ford 42#'s.
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Re: Think I need to add another fuel pump I am not aware of the operating pressure range for your injectors, but I know the Boschs and Densos lockup up with anything north of 75PSI. That would certainly cause a lean condition.
Just a thought.
SC
<small>[ April 30, 2002, 10:18 AM: Message edited by: SS00Blue ]</small>
Just a thought.
SC
<small>[ April 30, 2002, 10:18 AM: Message edited by: SS00Blue ]</small>
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From: Las Cruces, NM
Re: Think I need to add another fuel pump Mightymouse, question for you. The location you mentioned for the boost reference doesnt it see vacuum when not in boost? If so that would really screw up the regulator we are talking about causing problems when not at WOT.
Gary
Gary
Re: Think I need to add another fuel pump no, vaccum has no affect on the regulator that i have ever experienced. just try it, run some hose over to the left side of the cowl where some vaccum lines are and hook it in there if you have no other manifold options, if it doesnt help, then so be it. but i ran an incon regulator on my car for a while and it was the same pressure at 0 boost as in full vaccum.
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From: Las Cruces, NM
Re: Think I need to add another fuel pump Which Incon regulator they have two different ones. The original small one (LT1 regulator) did not work with boost and sometimes it did not work with vacuum properly (usually essentially 1:1 or sometimes would still drop). The new one they are using is Aeromotives 1000 hp regulator, which if it gets vacuum will go like 2.5 or 3:1 as you go WOT. I am not trying to aurgue with just want to make sure we are talking the same regulator here.
Gary
Gary
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From: Chicagoland
Re: Think I need to add another fuel pump but I know the Boschs and Densos lockup up with anything north of 75PSI.
Never heard of a Bosch locking up at 75psi.. I have some flow sheets on the Lucas 42.5 '009' injectors flowing them up to 100psi with no problems. I have some other Bosch injectors that were flowed just as high with no problems. The Delphi injectors do have problems at about 90-95psi, and will lockup.
Brian Green
Never heard of a Bosch locking up at 75psi.. I have some flow sheets on the Lucas 42.5 '009' injectors flowing them up to 100psi with no problems. I have some other Bosch injectors that were flowed just as high with no problems. The Delphi injectors do have problems at about 90-95psi, and will lockup.
Brian Green
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Re: Think I need to add another fuel pump </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by bgreen:
<strong>but I know the Boschs and Densos lockup up with anything north of 75PSI.
Never heard of a Bosch locking up at 75psi.. I have some flow sheets on the Lucas 42.5 '009' injectors flowing them up to 100psi with no problems. I have some other Bosch injectors that were flowed just as high with no problems. The Delphi injectors do have problems at about 90-95psi, and will lockup.
Brian Green</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Oops. I think I've overstated myself. Please allow me to reiterate.
I know that holding an injector WIDE OPEN, one can flow all sorts of numbers. That doesn't make any difference at all. Trying to cycle an injector in the range of 75-90% duty, with 75PSI on top of it will jamb an many injectors, if only intermittently. This will lean cylinders.
Now, I apologize. Sometimes I have more passion about subjects I've personally burned learning curves through. I'm not very bright, as a rule.
So, as I asked at the end of the previous, unfortunate post, "What do you think is the explanation here."
Just asking...
SC-
<small>[ May 02, 2002, 12:50 PM: Message edited by: SS00Blue ]</small>
<strong>but I know the Boschs and Densos lockup up with anything north of 75PSI.
Never heard of a Bosch locking up at 75psi.. I have some flow sheets on the Lucas 42.5 '009' injectors flowing them up to 100psi with no problems. I have some other Bosch injectors that were flowed just as high with no problems. The Delphi injectors do have problems at about 90-95psi, and will lockup.
Brian Green</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Oops. I think I've overstated myself. Please allow me to reiterate.
I know that holding an injector WIDE OPEN, one can flow all sorts of numbers. That doesn't make any difference at all. Trying to cycle an injector in the range of 75-90% duty, with 75PSI on top of it will jamb an many injectors, if only intermittently. This will lean cylinders.
Now, I apologize. Sometimes I have more passion about subjects I've personally burned learning curves through. I'm not very bright, as a rule.
So, as I asked at the end of the previous, unfortunate post, "What do you think is the explanation here."
Just asking...
SC-
<small>[ May 02, 2002, 12:50 PM: Message edited by: SS00Blue ]</small>