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07.5 - 09 3rd Gen 6.7L Performance Parts Discussion Discussion of Performance Parts For the 6.7L Trucks...NO ADVERTISING

Thread: 6.7 P-Pump Conversion with Pics Reply to Thread
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  Topic Review (Newest First)
07-26-2019 11:17 PM
perlhaqr I'm also curious about the state of this build. I'm looking at building a pure mechanical Cummins for a 1972 application, and have been exploring options of just using a "stock" (it won't really be stock, but you know what I mean) 12v with p-pump, fitting a p-pump to a 24v 5.9, or possibly even doing something like this.

Does the 6.7 not have an engine driven lift pump like the VE 12v does? Is that why you need the M35A2 fuel pump?
04-12-2019 02:40 AM
JuniorBTG So did this get finished?
01-01-2016 12:25 AM
mantis118 Holy crap! that was alot of work! But looks fun!
12-31-2015 02:19 PM
Jonah Close Very interesting! Not to be ignorant, but why couldn't you just drop an 8.3L (6CT) Cummins in it?

Definitely a neat build though!
08-29-2015 01:50 PM
Verticalrod Sent from AutoGuide.com Free App
08-26-2015 11:21 AM
jlbayes in.

1234
08-26-2015 08:28 AM
Chigger I'm not sure how much in volume. I know on the M35A2, the pump can easily pressurize the fuel to 60-70 psi at around 2500 RPM. It is a big gamble to see if it works on my Cummins engine. I suspect that it is more than enough fuel. The excess will just go through the relief valve and back to the tank.
08-26-2015 04:37 AM
LORDBLiTZ
Quote:
Originally Posted by Chigger View Post
Finally, here is the finished product. Hopefully I will have some time this weekend to see how well it runs. The beauty of the M35A2 fuel pump is that it has an internal bypass. This means that I can temporarily use an in-tank pump to prime the fuel system if there is any air in the line. Once the line is primed, the pump can be turned off and the motor should run with only the mechanical pump.
That is very cool! How much fuel can that pump supply?
08-25-2015 11:00 PM
Chigger Finally, here is the finished product. Hopefully I will have some time this weekend to see how well it runs. The beauty of the M35A2 fuel pump is that it has an internal bypass. This means that I can temporarily use an in-tank pump to prime the fuel system if there is any air in the line. Once the line is primed, the pump can be turned off and the motor should run with only the mechanical pump.
08-25-2015 10:32 PM
Chigger
Quote:
Originally Posted by ganzey View Post
HOLY CATS!!! you are doing some amazing work in this thread. as you stated, its probably not the best idea to ppump a 6.7, but god damn, you are making that engine your b!tch!
Thanks bro... It really is a pain to p-pump the 6.7, I didn't really have to create a mechanical gear type fuel pump. I could have just used an electric pump. However, with an engine driven fuel pump, I don't have to worry about an electric pump going bad or have to pay top dollar for one.
08-25-2015 10:17 PM
Chigger These are pictures of the adapter being completed. Maybe when I grow up, I can be a machinist.
08-25-2015 10:12 PM
ganzey HOLY CATS!!! you are doing some amazing work in this thread. as you stated, its probably not the best idea to ppump a 6.7, but god damn, you are making that engine your b!tch!
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