vj_M

I know this has probley been asked a million times before and numerous threads on it but i'll ask in my own manner so i can get a better understanding about it.

I'm probley going to be in the market for a new fuel pump soon and was wondering about an in line one like BD makes.? Iam not really going to be running alot of power (at the most 150hp chip) just knowing that that extra support is there.
My buddy resently put in a FASS and iam not really wanting to spend that kinda money or time putting it in. Iam pritty much wanting the inline pump because it seams simple enough to do.
I do believe that bully dog makes one too for the older 2000 style.

If it was installed (THE BD ONE) you just leave the orginal one in the tank and use that as well?
so it would be basicly 2 lift pumps???


Thanks
VJ

chipmonk

most people who plan on keeping their trucks for a while get the entire fuel system and not just the lift pump. with the system you get filtering down to 5 microns with air dog or 2 microns with glacier as well as removing the air from the fuel. if your current lift pump is in your tank (it is on my '05) you do not need to remove it but it will not be running with your new pump but by not removing it you can switch back to it if your new one breaks down.

vj_M

the BD instrcutions state that u need a lift pump that is in perfect running order..
So would the extra pump just make it easyer for the original one? and keep the pressure higher when you throw your foot into er?

and how much fuel pressure is too much?

vj_M

anyone? I was lookin at the carter "Carter P4601HP - Black Pump High Pressure pum
how much pressure is to much?

schu

I'm not an expert but I've been reading up on this. From what I gather, the 03-04 had the lift pump under the hood where the fuel filter is. The 04.5-current has the lift pump in the fuel tank. I wasn't aware that any kit would let you use your factory pump in line but I wouldn't want to do that anyway because its one more thing to fail and the factory lift pump isn't nearly as trustworthy as the aftermarket.

If you have a 04 (not 04.5) and the pump is under the hood I would go ahead and replace it now with a good pump because then you don't have to drop the tank. If you have the dealer fix it they will put the updated pump in the tank which is much more difficult to get to when it fails and it probably will.

schu

JP-4.5

I have a 4.5 and the lift pump was on the filter under the hood. I am fairly sure the in tank pumps started in 05.

bekim

Mine WAS in-tank. True it was the '05's that have it in-tank. Changing to a GDP or FASS should be simpler if your LP is on the filter housing.
Mike
###

rich2500

the BD instrcutions state that u need a lift pump that is in perfect running order..
So would the extra pump just make it easyer for the original one? and keep the pressure higher when you throw your foot into er?

and how much fuel pressure is too much?


you are exactly right as to what the bd set up does,it pushes the fuel up to the engine mounted pump so it don't have to work so hard,with this set up you should see around 20-25psi at idle and should not drop below 15psi under excelleration,mine has never dropped below 18 psi,there has been lots of speculation that if your stocker dies the bd/carter pump will not push fuel through it but I have personally tested it and that is false,the fuel pressure drops but the truck still runs fine.there are definately better fuel systems out there but if you don't want to spend the money the bd set up serves the purpose.

JP-4.5

VJ,

If your lift pump is on the filter housing as mine was it is a very easy job. The GDP kit I went with came with a adapter that replaces the filter on the housing to keep filter/water seperator and fuel heater still in the loop.

Mike,
Sounds like you need an after market lift pump and stop replacing that stock one. Leave the stoclk pump as it is and add a draw tube in another spot.

bekim

I'm waiting til just before the 100,000 mi warranty runs out, then i'll go GDP.
Right now i'm in the 80,000's. Not looking forward to dropping the tank.
Mike
###

vj_M

yeah iam not lookin forward to droping that either i just read up on the BD one and having two running and feeding the CP3 sounds like a better idea to me. As long as the pressure does not drop below 15psi like RICH said that would be a good enough system for me. and 20 to 25psi at idle sounds just as good as having a FASS system.

So if i got that BD one all i do is put it in the main line and run the wires to their spots? Like theres no return line coming from the other side of the cater pump itself back into the tank

chipmonk

before you get that bd you should realize that if your factory lp goes out it sounds like the bd won't work on its own. i would rather spend a couple of extra $$$ and not have to rely on a factory lp with a horrible track record.

rufushusky

I going to run a carter pump, either the p4601hp or the lower pressure p4600hp. I am going to run it inline with my stocker, which thanks to a LP failure is in the tank now. I am going to pick up a 2 micron fuel filter and big line kit from Glacier and run the carter/stocker combo since I think the other pumps are great but a little overkill for what I have now. Once I start playing with the CP3 then I will look into a more powerful pump.

Just an idea if you are uncomfortable with the high pressure p4601hp, which is 18psi, the p4600hp has the same 100gph flow rate but at 8 psi. I think about 20-25 at idle is ok and I have heard that anything under 5psi will strain the LP.

vj_M

my pump is in the tank due to failure as well at about 100,000km and its got 185km on it now.i don't have my fuel pressure gauge hooked up right now to get a reading on what its pushing. But i heard of this new set up running stacked chips and not having a problem. diablo and a puck.
so having the one in the tank and that high power cater pump 18psi hooked up it should work ok right??