Mechanical Fuel Pump

[rbattelle]

It will be a full billet pump

What do you mean full billet?

Good question. Do you mean there won't be any cast aluminum in the pump? It's all going to be machined from bar stock?



Ryan

 

[Gary - K7GLD]

Good question. Do you mean there won't be any cast aluminum in the pump? It's all going to be machined from bar stock?



Ryan

WELL, having experienced a VP-44 failure due to the softness of the bore material (Brass) in the advance cylinder, I would hope there is stronger and more durable material tham aluminum used on the wear surfaces of this fuel pump...



Yeah, I know, less PSI is involved, but still...



The real killer in "improved" setups like this, is the test miles in a wide variety of users and climates need to fully test all aspects of performance and durability - I don't envy Stefan on this one!

 

[rweis]

I did some research on gear pumps. There are some gear pumps out there in industry that have been on the same design since the '80's, have field repair kits etc and would be perfect for our application. No one is going to reverse engineer it anytime soon. They are brass bodies, stainless steel bearing surfaces, case hardened shafts, bypasses if you want that feature, substancial mounting castings, field rebuildable, 30,000 hours MTBF (900,000 miles), less than $250 for the pump. Looked pretty ideal to me, but my RASP is running very well, but if it ever develops a problem, then ... .



I think the real design arena is how to drive the pump. The crank pully concept is not bad, but sort of marginal in some weather areas. I will be really interested in how they drive this one. The reliable drive system is everything. Notice I do have a FluidDampener AND a RASP? Very close quarters, but doable (Instructions say there is not enough clearance).



I do not use the electric pump at all, even on start up. The first second of engine rotation gets up to 8 psi before injector ignition, then as the rpm starts up so does the fuel psi until it reaches the bypass psi (mine set to 16 psi bypass).



I would rather crank the engine for 1 more second, than mess with the electrical pump at all. I have the electrical lp on a on/off switch in the cab if needed. I do use it pre start occassionally just to check it is functional. I can use it when I go out to close the windows without starting to see if it is functioning properly because it is on a on/off switch as well.



Should be interesting,



Bob Weis

 

[RonA]

I wish someone would make one that would clear the cross member on a 1st gen. I'd love to have a mechanical, but it looks like I'm going to have to design my own.

 

[rbattelle]

Seems like the PTO would be a good place to get power for a mechanical pump, no?

Ryan

 

[PLaFrombois]

Any updates??

 

[BSwope]

Bump!!!!!! Any Update?????

 

[BSmart]

Anything new on this topic.

I'm burning up the keyboard trying to decide which way to go before my stock pump takes a dirt nap.

I like the mechanical approach.

Keep the info flowing...

 

[p-Bar]

Bump to top

 

[BSwope]

Fellas im goin with the Mitusa pump from Opie!

 

[PRout]

I'll be interested in hearing how it works out for you.

Have been holding out for some time waiting for this new rasp, but not having much luck attaining one.

Electronic pumps are next to being disposable IMO. Some last longer than others, but ultimately, they succomb to the high consistent duty loads they operate at.

 

[aircop]

Nexted spring I'm going to the 12 valve pump.

 

[JDiepstra]

So no updates in 7 months huh?

 

[radar doctor]

where are we ?? do we have a plan?? i'm interested. .

 

[Stefan Kondolay]

heat treating guys went out of business, so I am testing the new companies heat treating. I was just about to release them then they dropped that on me, so should be very soon if the heat is the same as the last guys.

 

[rweis]

Still in progress though?, that's good.



Bob Weis

 

[nutter3]

Stefan,



How is this product coming along?



andre

 

[AirDog]

Im interested as well??

 

[jdooner]

mech. pump

Bump... ... .

 

[rweis]

same here for an 02