Guess my total HP!

[Sleaper]

Here you go, this is with both pumps installed and the same result with just the intank pump installed and the inline bypassed.

http://www.ls1truck.com/newstorage/j...ldrop-lowq.wmv

That thing is unreal!!!

[casey23]

what about a boost ref FPR........ soon as it goes on boost fuel pressure drops....

[bangbangskeetskeet]

That thing looks to be pretty friggen bestly dude!!!

[farmtruc]

I bet there is a restriction in the fuel system somewhere. Run -8 line to the fuel rails and remove that chance. In the video the fuel mixture stays good even though the pressure falls off. Can you load the dyno and roll up to speed rather than matting it?

It's not the fuel rails and cross over, that's 1/2", so we're good there.
I'm gonna install an inline a1000 and -8 to the fuel rails, I just might Y it off before the rails also and feed each one, then of course back to the regulator.
That was loaded Red. Ya, the a/f ratio is only staying good because I'm dumping a butt load of fuel as soon as boost comes on. Commanded is about 5:1 a/f ratio lol, but it can only maintain 11.0 or so for a second, then go lean.
I normally load the dyno 10% for all NA trucks. That makes the dyno run about 3-4secs, depending on how high I take it up.
On a light turbo setup, I load it 20-25%, enough to spool the turbo.
What you're seeing here is 30% load, but in second gear, so it's loaded like a mofo.
Just to compare this, a 300whp NA truck would probably take about 15 secs to complete it's run on a 30%, that is if it can even pull 30% load.
It's like trying to tow a 8000lb trailor, lol.
The dyno can load the truck so much, it'll stop the wheels, overheat the trans, or break the trans, ha!

I'll get the stuff ordered James.

allen

[farmtruc]

what about a boost ref FPR........ soon as it goes on boost fuel pressure drops....

That's also a solution, but i hate afpr, they aren't very consistent and hard to tune.

[George C]

That's also a solution, but i hate afpr, they aren't very consistent and hard to tune.

isnt the stock FPR a 1:1? I know my truck had a vaccum FPR. Id say its much easier to tune this way.

I was running 2 340s with no issue fueling 18psi. my fuel pressure stayed solid and my AFR was nice and steady from 10.8-11.2. when i lost 1 pump i lost 8psi of fuel at idle. Since i lost the one pump im limited to 9psi, i had to adjust base fuel back to 58psi. I have 2 -6 into a Y then into -8 up to rails, crossover over with -6 and return with -6


Parish did 2 intanks with stock lines and made 1k, so stock lines can support it but does have some inconsistency in the higher ranges


a inline and intank isnt really helpful, your only going to feed as much fuel as the intank can suppy from the tank.

2 pumps intank or external with their own feeds into a Y block works very well and has worked countless times on tech. No reason it wont work for this application as well. It is possible to have a restriction in the fuel system and is possible for low voltage to pumps which wont supply the right amount of fuel since they arent working fully

[RedHeartbeat]

Are the fuel pumps wired with a hotwire kit, 10 gauge wire directly from the alternator to the fuel pump through a relay? The relay could just provide ground if thats how you wanted to set it up.

[casey23]

That's also a solution, but i hate afpr, they aren't very consistent and hard to tune.

Pretty sure 2 years ago This Allen nelson guy was telling me how to convert my stock 54psi truck into a 60psi boost refranced system with very few parts with my return style system that i have.... took me about a month to figure out exactly what he was telling me to do... It was very simple and worked very well....

[farmtruc]

a inline and intank isnt really helpful, your only going to feed as much fuel as the intank can suppy from the tank.

Ya, this has already been said, thanks.
Upgrading to one large pump, a1000, will be just fine, just as easy and just as effective as the rest of the solutions.

You're also forgetting most of the guys spray meth. I don't like to depend on meth to supplement the fuel system.

No need to go back and forth and debate on the solution, this one big pump should last him a while and he shouldn't out grow it.

Are the fuel pumps wired with a hotwire kit,.

ya, sure are.

Pretty sure 2 years ago This Allen nelson guy was telling me how to convert my stock 54psi truck into a 60psi boost refranced system with very few parts with my return style system that i have.... took me about a month to figure out exactly what he was telling me to do... It was very simple and worked very well....

That's because you were running the stock stuff and easiest way to make your fuel system act larger than it is is to use that method.
It works fine and has for many years, but like we talked about, it was easier for you to go this route, not on this truck.

I shouldn't say the afpr is hard to tune, I just don't like because it takes longer to get it exact under every rpm and boost condition, especially with a turbo, since it's dependent on load.

[Justin_Inc]

wow sure starts to haul ass! an A1000 with a -8 line to the rails will be a godsend to that thing (I'd personally go -10, its overkill now but if he wants to crank it up later lots of room for improvement). keep us updated

I agree 100% on the BFPR, they are junk IMO and are bandaid's. If you have to crank the **** out of the fuel pressure to feed the setup then you might as well upgrade injectors and do it properly.