I did some searching over on LS1TECH and found this pump.
Will it work for my set up?
Thanks guys.

http://cgi.ebay.com/ebaymotors/Walbr...spagenameZWDVW

 

I have never heard of a 392 before, but then again i have a returnless fuel system with a intake pump. Hopefully someone else will chime in here.

 

I'm wondering if I can just hot rod my stock pump instead.
I've seen a few kits out there, I'll try and find some links.

 

Found a link with allot of different in line walbro pumps.
Which will work for our trucks?
How much flow will I need?

http://www.lightningmotorsports.com/walbro_inline.htm

 

The GSL392 is the one. But why not just go with the GSS340 intank and not have to deal with all the modifying for the inline pump?

Also remember with the inline, you still have the intank pump to deal with. The inline will flow to its potential because the stock pump is a restriction.

 

I have heard others here state that an in line will support 600hp.

What your saying is that no matter the flow rating of the in line, the stock tank pump will not be able to supply the in line with enough volume, pressure, or both?
I have heard so much on both sides I don't know who is wrong and who is right. I like to hear facts, not just "well I had a ......and it did .....

Not aimed at you Vannilla just what I've got as far as responses here.
I really don't know which way to go thats why I'm posting questions on the subject.
Thanks for the feedback.
Tim

 

Holley in-tank 255LPH #12-902 works perfect. IMO those boost-a-pumps are a joke.

 

does the intank version mess up the factory basket like the twin intake one does? if so that is a good reason to go with in inline.

i ran a gss340m on my last truck, it was in inline version with the stock pump still running in the tank. super easy to install and suported my extcab 4wd into the high 11's with a little room to spare. by the end i was running a 6.0 at 10psi with a 100shot wich should have been good for close to mid 11's.

i have to question the arguement about the stock pump being a restriction. if you look at the flow chart for any pump the flow goes up a lot as the required presure goes down. the stock pump only has to pump the fuel a couple of feet now and at only a few psi so the flow rating will go up a lot. likly to over whatever the gss340m or 392 flow rating once up to presure.

 

I'm not saying this won't work, as it does. Lot's of FI kits come with this setup. It should easily take you to 600bhp. I'm just saying that you're not going to get the full potential with a smaller pump in front of it. Parish has a good point about the factory pump just feeding the inline, but whats the rating on the factory pump? That would say a lot. It's going to be a ton better than any voltage booster, thats for sure.

I would like to know if the inline would still work some what if the in tank failed? That would be interesting to know.

 

the inline would loose some flow but would still run if the stock pump failed. same goes for if the inline failed, the stock pump would still run but it would flow less.

i think you will get the full potetial of the bigger pump, maybe even a little more out of it than if you ran it alone. the stock pump will be pushing the fuel into the bigger pump, even when the big pump is at max flow/presure. the stock pump pumping at only a few psi will be able to pump more flow than the bigger pump at 60+psi.