GMC SKI

After going to dyno the 2002 gmc 5.3L with the procharger today...since the last time i dynoed it I've put in some tr6 plugs new msd wires and a magnaflow catback .
the first run blew the intake pipe apart from the engine ....
Second run got to about 5000rpms when it blew off again ..
it was enough to see that my air fuel was at 14.8-15.3 which suggests i need more fuel right?
where i want to be they tell me is around 12.5 or so ?
this means i need a high flow fuel pump and maybe a fuel preasure regulator
Can anyone suggest ones that will work with our trucks
My next question is will the injectors support more fuel?
still managed to pull a 366 rwhp even with things all screwed up lol
jim

<small>[ May 23, 2002, 09:20 PM: Message edited by: GMC SKI ]</small>

red53gmc

I have a walbro 255 lph in mine now although it's not a direct fit for the sending unit. It fits, but I can't run WOT with less than 1/8 tank of gas or the pump starves. Thats got to do with the fuel pick up. I need to drill some holes in the stock sending unit. Also, the trucks have adjustable fuel pressure regulators already on them. You might want to bump up the pressure closer to 60psi.

<small>[ May 23, 2002, 09:56 PM: Message edited by: white53gmc ]</small>

oxidizr

iTrader: (4)

Regarding the intake tube separation from the engine...

What part is coming apart? tube to TB?

How much boost are you running? max or at the time the intake comes off?

Is your vehicle perchance a "drive by wire" TB vehicle?

Regarding the fuel issue...

Are you running stock injectors? fuel pressure?

Are you running stock tuning?

Richard

GMC SKI

where would the fuel presure regulator be in the truck ?
i have a fmu unit that the ati kit shipped with
the unit uses some of the stock intake tube clamped on to a new 90 elbow that i put in .i'll send you a pic of the pipe
i'm using the bbk throttle body no electronic tb
stock injectors
fuel preasure i haven't measure it yet my next step
stock tuning there insn't anything for the procharger out there unless i go with hypertech with might be bad i think ?
i gotta install my boost guage and air fuel guage still

graygmc

whatever you do, dont order a fuel pump from truckperfornamcecenter.com. after being under my friends truck for 2 hours we found out that they sent him the wrong one. so we just had to bolt up the tank again. what a waste of 3 hours. i dont even know if they make a high flow fuel pump for our trucks yet.

red53gmc

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by graygmc:
<strong> after being under my friends truck for 2 hours we found out that they sent him the wrong one. so we just had to bolt up the tank again. what a waste of 3 hours.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">By the way, it's easier to change out the fuel pump if you have a friend help. Unbolt the 6 bolts holding the bed down and pick it up and move it back some and work from the top of the tank.

<small>[ May 25, 2002, 09:53 AM: Message edited by: white53gmc ]</small>

graygmc

yeah i wish, but he has a bed cover that weighs a lot. and also it bolts to the bed so it would of been a pain to take off.