The VE pump gets better Fuel Mileage

/thread

 

I love the dynamic advance, and that alone will keep me in the VE until someone figures out a dynamic advance retrofit for the P-Pump.

 

lol my ford is getting like 550kms on 100 litres of fuel on a good tank right now. of course that's short hwy and town driving but still... it's only like 13 US mpg. Pretty brutal imo considering the transmission is a great trans. I know strictly hwy I get decent mileage but even so. The VE in my other truck with a crapped out 518 w/ no lockup was getting better mileage.

That and the ford smokes like a train if I put 'er down. Part of that is the turbo though. When money allows I need to do something about that... truck sure has a ton of power over the VE, though. Easier power to make too.
Even so, I still prefer the ole VE in the first gen. Prefer the ford truck though...

Ok, I'll stop talking about nothing in particular now...

 

I believe the 1998.0 P pumps had some sort of timing advance? Anyone care to educate?

 

A 215 pump and maybe California 180's(not 100% sure there) have variable timing, but it's not what we want. It retatrds the timing at/near full fuel.

Some Mack engines used a pump gear that advanced the timing with RPM. It uses a flywheight setup like a distributor. I don't think it works very good when you turn the fuel up since the pump will take more HP to turn. That will reduce the amount of advance or just plain eliminate it.

If you had the brains and/ or resources, with today's hydraulic cam phasers it could be done. But then you would be putting wiz-bang stuff on something thats supposed to be simple. It would be sweet though.

 

my understanding is that no p-pump has any sort of dynamic timing. The only timing adjustment on a p-pump is adjusting the gear on the pump shaft. Which is impossible while the engine is running.

 

The Mack has an inline Bosch pump. I am not sure if it is a P7100, but very similar.

On the 215 etc. They do it by delaying the start of injection at higher rack travel.

 

what if i put a 40hp feul pin and 3200 gov.spring that help.

 

yes, of course.

With a little money you can get 300hp and close to 700ft/lbs of tq to the wheels on a VE
With more money you can get 400-450hp & 900ish ft/lbs no problem to the wheels. But it's a reasonable amount of money and effort to do right

The thing with a ppump is you can get 400hp real easy, whether you do it right or not is up to you. It seems 600hp is even fairly easy.

I'll say this though, I wish my ford had a VE powered cummins in it, not a ppumper.

 

While this sounds difficult, I suspect it is just a matter of effort. On drive torque cancelling advance, let me suggest the weights driving a worm gear. Just as TORSEN applies this drive directionality principle for its differentials I bet such a thing could be made to drive a P7100 without drive torque issues. how much advance is required? if we start from a moderate 16-degrees on the pump, I imagine that less than 15-degrees of advance would serve well.
cheers,
Douglas