Just wondering if anyone has added an electric fuel pump in line with their lift pump and if they noticed a differance.also placement and type would be helpful.

 

I have never heard of anyone doing it with a 12v, as they rarely have FP issues.

 

i am curious about the same thing, as i am on my 3rd lp in under two years. unlucky i guess, or maybe there was a flawed production run or something? a mech i know recommended the ac/delco made for the gmc 6.5, others have recommended walbro, but my mechanic says they're not so good. either way, i'm pretty sure you need a high volume - low psi pump, but don't know specific numbers.

 

BUMP-

You might try PMing infidel if he dosen't see this and post his suggestion. Bill is our 12v guru.

 

Putting an electric pump on the extremely reliable 12 valve to me is like saying if you have a cold take a shot of malaria.

 

Infidel pretty much summed it up.....

I have seen many very high powered 12v's perform flawlessly with the stock LP.....I don't know what their limitations are but I have personally seen 600 hp with a stock LP and have heard of even more than that here on a stocker....my 12v was in the 450 hp range on the stock very high mileage LP with zero problems. I think this is definitely a classic case of "if it ain't broke, don't fix it". Don't expect any type of positive gain from adding some other form of inline pump to the stock 12v LP.

 

i have a brand new lift pump on my 98 and i drop to zero fuel pressure at full boost. and the truck is only at 500 or so rwhp. i need another pump to supplement the factory one. i have been looking at a walbro to kick in at 10#s of boost.