When do you need to install one,what symptoms do you experience. How will I know if I need it.? Should I hook up my the tech 2 and moniter fuel pressure drops. Or is there a hp/trq # that seems to be consistent ?


Thanks Jay

Typically the rail pressure will start to suffer above 350 RwHp. That's not to say you cannot make more Hp it's just that at power levels above that you will begin to see rail pressure can nolonger stay up with commanded pressure. To me it means the pump is being starved for fuel at that point, not a good thing in my book. Above 400 RwHp you will also typically see a gain in power when installing a proper lift pump that will hold 5 psi at the inlet to the factory high pressure pump assemble at all times.

Thank you Diesel Tech.


That is exactly what I was lookng for.


Jay

How much trouble is it to hook up a typical Holley inline pump with an on/off switch to use just when you need it.. I've heard they aren't the most dependable unit, though using it on a limited basis may be different... I'm just stabbing in the dark at this... My truck at full acceleration has pauses that make the truck fall on it's face and then it accelerates till it does it again.. Mostly around shift points... Advice?? I've heard by a sponsor here that most fuel systems offered to us have issues... I'm just worried about using nitrous without some kinda aid to the fuel system.. They installed a 60 nos jet that flows through the intercooler and a 55 going straight into the motor... Suggestions??

Morse


a 55 straight into the motor ??? where?


Mine are both at the intercooler

If you install a boost pump and plan to use it only sporatically you have to be sure it's of the type that will allow fuel to flow through it when it's not running or figure out some type of bypass for when it's off. I don't think the holley will allow fuel through when the pump is not operating. You also have to consider how much additional restriction there is even if you install a pump that will allow fuel through. Also, and I might be wrong here, but I don't think the Holley is compatable with Diesel fuel.


On edit: It sounds like your problem is more likely the tranny defueling between shifts. Fuel starvation to me feels like surging or maybe like what some people have called "bursting" I believe, although there are other things that can cause "bursting".Edited by: a64pilot

I dont have bursting on my extreme but the rail pressure is dropping pretty good. I need a lift pump.


With the juice you arnt feeling running outa gas IMO its the way the juice runs.


It dosnt matter if you are running n20 or not. Your motor dosnt add fuel to bring it to a certian level like a gasser. It adds a specific amount of fuel and air is brought in to try to burn it. A wot you will be dumping the exact smae amount of fuel weather you are spraying or not. You also dont have to worry about leaning out a diesel like a gasser. You lean a gasser on spray and stuff goes pop, you lean a diesel out and you just dont make the power basicly. Dont worry about leaning out your motor. I wouldnt hit the 2 stage with the truck at an idle but you know what I mean.....


There are a few options that are going to be coming out....I would lean twards waiting a couple months. But I need something now so what i am going to do is get 2 FM100's and run those dudes in parallel. I think they are 160 a pop and have filtration built in to go down to 2micron. I just couldnt wait any longerEdited by: ratlover

Diesel5... I'm gonna try to figure out my digital camera (still in box).. I'll try to put one on here..


Ratlover, I always thought with our diesels we didn't have to worry about leaning out either... I had heard that we could just add nitrous until it didn't get any quicker, then quit when it stops getting quicker. That was until I had TS Performance install mine.. They told me to pay attention to smoke.. If there's not atleast a haze I need to stop and back off a jet size.. They told me it wasn't as safe as everyone was thinking.. They busted their cummins head in 5 different places with a dry system. They informed me that I woud definitely have problems If I tried to go too large on the jets.. I stack the attitude and the 120 predator, though the combo just doesn't work great.. I had my tranny built about ten thousand miles ago and a triple disc installed at suncoast.. I hope it's not the tranny.. Joe did tell me if I have any problems, he'd fix it.. I know Manny (600+duramax) was using a holley pump on his 11.90's truck, though I'm not sure how he has it set up..


What's the word on new stuff coming out?? Fill me in... http://www.dieselplace.com/forum/smileys/smiley4.gif

Wonder if larger fuel rails is not the true solution?

Morse, did TS also mention they were running propane when they had the head problems?

That was just my answer when I asked what was the worst that could happen... I know you've been running nitrous for a long time now.. How do you feel about it?? What's your experience been?? Do you also have an inline pump to aid with fuel issues?? If so, which?? How large of a shot are you running?? What size jets?? Thanks for the info.. Just curious...

Jet size?


Mike's truck just run a full line from the bottle http://www.dieselplace.com/forum/smileys/hihi.gif


Yes he has a pump, same one that Eric is using (name ?).

What would be the best pump use?Where would you install it?

Here is my understanding of nitrous on a diesel. It isn't critical like a gas motor because a diesel varies the mixture from idle to full power, whereas a gas has a relatively constant fuel mixture. In other words, on a diesel, you only control fuel. At low load levels, there is alot more air being pumped through the motor than is necessary to burn the fuel being injected. When you start seeing smoke under load, that is when there isn't enough oxygen for what fuel is delivered. Nitrous adds oxygen, so you can run more fuel in conjunction to make more power. So, if you add more nitrous than is necessary to get rid of the smoke, you are just wasting the extra. As was mentioned earlier, a diesel that goes lean just doesn't make as much power. Diesels get hot with extra fuel, not by going lean like gassers. That is why diesels don't go crazy with power on nitrous like gas motors, because you have to add alot more fuel to utilize the added oxygen. If you add nitrous and propane to a diesel, it would make lots more power, and probably very little smoke.

I run a carter 100gph 7psi pump

single stage nitrous w/ .059 - .062 jet

Tomac, have you had any trouble with your fuel system?? If you don't mind me asking, where did you get your pump and about how much did it cost?? Thanks for the info...


Brad

I've never had any fuel system issues with or without a lift pump but I had to change the fuel filter very frequently without the lift pump. Check out jegs and summit for the carter pump. I think they're about $75 for the 7psi and $85 for the 15psi version, both are 100gph. They're made for use with diesel. I've been running mine since May, Eric has been running one about 6 months longer than I have w/o problems. Extra rubber isolation when mounting the pump to the frame quiets the pump down alot.Edited by: mtomac

Hey Tomac, are they much trouble to install or is it fairly plain and simple. I have had some fairly simple things turn into a disaster lately. LOL. Just wondering what kinda undertaking I would be getting into.


Ry

depends if you want to cut the factory steel fuel line or not

does it make a difference if i do or not? As far as performance goes...

Tomac,



Why do you have to cut the factory lsteel line. Why don't you pop
off the flexible hose and mount the lift pump in between two slip-on
pieces of hose (like the Nicktane kit does)? Or, am I missing
something big here?



Thanks,

Dennis

I didn't cut the factory steel line but some guys do.

morse, I wouldn't expect to run faster at the track with a lift pump

morse, I wouldn't expect to run faster at the track with a lift pump


I respectfully disagree Mr. Tomac sir. http://www.dieselplace.com/forum/smileys/smiley9.gif I think the difference will show up more at the track than on the dyno.


So there you have it Morse, two totally different opinions from two different guys. Or at least an opinion from a Mike and a Guy. http://www.dieselplace.com/forum/smileys/hihi.gif


Somewhere I'm pretty sure Mike and I agree on the lift pump being a good idea whether you can feel/see it or not. http://www.dieselplace.com/forum/smileys/smiley2.gif

my truck isn't any faster with a lift pump than is was without it as long as I had a fresh fuel filter

Edited by: mtomac

Which pump is the best choice?? The 7 or 15 psi??


Thanks..

I'm running the 7psi and it only drops to 3.0 - 3.5 psi under full acceleration with programming on kill

The 15psi probably would maintain better pressure maybe only dropping to 10 psi. Positive pressure is all that's needed so I don't see a reason to use the 15psi pump. Fuel passes thru the EDU for cooling and I'm not sure how much pressure it can handle.

Im gonna run a quad 215 thursday to see if it has a pause in the power,like my edge has when I run it hard.


I cant tell if I need a lift pump, or the edge program is causing it.


Jay

The pause while shifting is the edge and the fact the stock programing is defueling and the edge has to follow suit. I notice a difference with few thoudsand on my fuel filter and the extreme. The edge, even hot didnt seem noticable.


Edit: no bursting just laying over. Now were the hell is the UPS man with my freaking pumpshttp://www.dieselplace.com/forum/smileys/smiley7.gifEdited by: ratlover

Ratlover


I Ran it in no back down mode and it still does it. It also seems more severe when I run in tow/haul. &nb sp; Edited by: sandsuby

Somebody will corect me if I'm wrong I'm sure but the way I understand it is.......


Your factory program is defueling durring the shift. The juice is piggy backing off the factory programing and the factory programing will cut a bit of fuel and the juice follows along with it. You can tell the juice to defuel less in its programing(what is called the nodefuel setting) or to pull more out of its programing(defuel on) But your still riding on top of the factory stuff.


The quad or the predator or name a programer or tuner gives your truck a lobotomy and the tuner puts what ever he sees fit in there in the way of how much fuel it will pull out on shifts. A TTS is just swaping brains and does basicly the same thing.


My point is I dont believe you are ahving a fuel supply issue with the juice. A fuel filter will pose a pretty good restriction though depending on how much demand you are placing on the fuel systme and how dirty it is.

OK I got it now, I didnt realize that gm controller defueled on shifts. Thanks Ratlover


Jay