6.4 pusher pump on 6.0

mcdaniel1991 · Apr 13, 2014

I have done some searching and I cannot find out how to set this up. Im guessing i just need some 1/2'' fuel line and to make a bracket to mount it.

Do I need a sump?
can I use 1/2'' line to the stock hfcm?

Does anyone have pics of an install?

mcdaniel1991 · Apr 13, 2014

Also where can i get the adapter to wire it in?

Is there a special tool needed to disconnect the stock fuel lines...?

04cr450 · Apr 13, 2014

You need a sump to make the 6.4 pump work correctly. I used 1/2" quick connect fittings and 1/2" fuel line. I mounted it between the fuel tank and the transfer case on frame. The 6.4 wiring harness is the same as the 6.0 harness. Just extend the harness and wire the harness wire for wire to the 6.0 harness. The 6.4 pump works great and is well worth doing for sure.

mcdaniel1991 · Apr 18, 2014

My plan for now is to add the 6.4 pump to the stock lines. I know this is not the best way and if yall say it will not work then I wont waist my time. That said I just need a temporary (1 year or so) solution until I can afford to do a full custom fuel system(currently dipping to 25psi at WOT).

My plan is to cut at the rubber on the stock HFCM and attache a barbed fitting 3/8 to 1/2 to new rubber fuel line then to the 6.4 supply pump. I will also do the same for the return. Cut at the rubber 5/16 to 3/8 fitting to the supply pump.

I was either going to use hose clamps to attach the rubber hose to the stock fuel tubing or use AN hardline fittings which are rated for 50psi.

If anyone has any better ideas i'm open to suggestion!

swinky · Apr 18, 2014

Is the return necessary?

Sent from my HTC One using Tapatalk

cfdeng7 · Apr 18, 2014

Honestly I'm not sure a 6.4 pump will allow you to maintain 60psi. It sounds like your stock pump is pretty well smoked if it's dropping that far

Sent from my SCH-I535 using Tapatalk 4

mcdaniel1991 · Apr 18, 2014

Yea I was reading a little lady night and I came to that conclusion to. I am going to just replace my stock pump for now. Then add the 6.4 pump in a month or so.

Sent from my GT-I9305 using Tapatalk

mcdaniel1991 · Apr 18, 2014

swinky said:
Is the return necessary?

Sent from my HTC One using Tapatalk

Im not sure. Does anyone know if the return has to be hooked up on the 6.4 pump?

Sent from my GT-I9305 using Tapatalk

04cr450 · Apr 19, 2014

Yes the return hook up is necessary

Zmann · Apr 19, 2014

cfdeng7 said:
Honestly I'm not sure a 6.4 pump will allow you to maintain 60psi. It sounds like your stock pump is pretty well smoked if it's dropping that far

agreed I don't see any mods that would need extra fuel

so if filters and the pickup aren't the cause of the PSI drop
I would just be happy with a new 6.0 pump

Mdub707 · Apr 21, 2014

http://www.powerstroke.org/forum/6-...cussion/611650-6-4-pump-install-write-up.html

Where do you read fuel pressure from? Reading at the bowl mine holds steady pressure, but when I read behind the heads I see drops down to 25psi too.

mcdaniel1991 · Apr 21, 2014

My sensor is hooked into the test port on the bowl.

04cr450 · Apr 21, 2014

Mdub707 said:
http://www.powerstroke.org/forum/6-...cussion/611650-6-4-pump-install-write-up.html

Where do you read fuel pressure from? Reading at the bowl mine holds steady pressure, but when I read behind the heads I see drops down to 25psi too.

Thanks for posting my thread man. I was about to post it but u beat me to it. lol

swinky · Apr 21, 2014

I'm going to be running a Holley pump that's rated for 100gph at 7psi. Was only $65 shipped brand new. I'll let you guys know how it works with 190/75s.

Sent from my HTC One using Tapatalk

mcdaniel1991 · Apr 21, 2014

Looking forward to hearing Swink.

Sent from my GT-I9305 using Tapatalk

Mdub707 · Apr 22, 2014

04cr450 said:
Thanks for posting my thread man. I was about to post it but u beat me to it. lol

No problem. I saw you were in here and figured you'd do it but I already had it handy anyway LOL

swinky said:
I'm going to be running a Holley pump that's rated for 100gph at 7psi. Was only $65 shipped brand new. I'll let you guys know how it works with 190/75s.

Sent from my HTC One using Tapatalk

Don't some of the7.3 guys use this pump sometimes as well as a different pump (forget the name). I've only heard good things about the Bosch pumps and nothing but issues with the Holley's.