The Adventure Continues!!!!

[turbopower6]

Hi Folks,

I have resigned myself to re-engineer the fuel delivery system on our 1996 K2500 6.5 Suburban the way GM SHOULD have done it. With that said after starting with a "leaking" return line over the rear wheel frame arch that translated into replaing the fuel tank...the fuel sender...new tank to frame rail return and feed lines I am back to finishing the job the way I should have in the first place!! Patience please!

I am adding a Racor Parker filter/separator between the tank and the lift pump plumbed with steel 'saginaw' fittings like the factory setup. I am planning on adding the Walbro FRB-5 in parallel with the factory frame rail lift pump netting me with 2 on line lift pump setups in the event one or the other fails. Nothing like redundency protection given we have been stranded out of state before with this beast.

The question for the day is what is the AC-Delco part number for the 1993 frame rail lift pump and, correct me if I am wrong, is this not the version with higher pumping PSI than the 1996 version (GM 25117340)

I plan on doing the "Feed the beast Modification" as well thank you to all of the pioneers on this thread. Wow what a lot of work was put in here. Maybe we should go back to GM and send the bill for all of your engineering and shop time fixing their shit for engineering setup.

BTW...you will all chuckle to know that after speaking with the engine management engineers as Racor-Parker regarding my modifications, they shared their insights in dealing with the genius engineers at GM regarding the Duramax. Seems they are still a whole lot luckier than smart when it comes to fuel delivery for diesels. They finally went with the recomendation from Racor on how to do it correctly after about a year of back and forth. I told Mike at Racor "you guys have forgotten more about fuel filtration and delivery than GM will ever know"!!!!

Thanks for all of you input. We are seeking donations for mental health sevices as this truck is like a mental health problem that won't go away. :hihi:

Cheers,
Ted

 

[bison]

Yes the 93 LP gives more fuel and pressure than the later ones.

Funny though,on my wifes 95 with a 93 LP i got as much or better pressure even at WOT (3 lbs)with the stock fuel setup as i have with my 98 with the FTB mod and a 93 LP.
the 98 runs 6 lb at idle, the 95 does 7....Both take the pressure at the IP inlet,identical setup
You go figger?

 

[tanman_2006]

Are you staying with the steel lines on your fuel supply mods? If i ever get serious with mine it is getting larger braided lines from the tank to IP with an Air dog or fass pump. The prefilter is on my list too.

 

[bison]

you're limited to the tank pickup tube size,don't make sense to me to increase the size of the line from there to the LP.
My farm fuel is always clean.My fuel supply is good as it is,i have no desire or need to do more than i did.
If the current LP fails i prob swap a walbro in it (i got 2 on the shelf).