Anyone out there running the Sheid 12mm 4,000 RPM pump right now?

 

There were a few guys running the 12mm pump. One hit something like 525whp on the 12mm. I ordered one kind of in the middle between the 2 Scheid sells. Its got the 14mm head, but not the 4mm cam plate. It does have the same cut DV's, cam plate, and 4k gov as the 12mm.

 

Did Scheid give any indication of the longevity of the pump with your setup?

 

None at all. He said he wouldnt expect it to last forever as a daily driver, but should be perfect for what I do with the truck. I dont know the working details of the VE all that well, but a 14mm head shouldnt put that much more strain on the pump over a 12mm. Its still somewhat new and unproven, but I dont see why it couldnt be used as a daily driver for 100,000 miles. Does the 14mm head make it run significantly hotter or cause alot faster wear? Or is it the fact most 14mm trucks are used very hard for racing/pulling that causes the problems? We won't really know till someone puts a 14mm on a daily driver, and racks up some miles.

 

With diesel prices going up I may drive my truck to work some, since the old first gen gets awesome mpg. LOL

 

I think I'm too chicken to run the 14mm on my daily driver. But it would be interesting to know if one could live on a daily driver.

 

I am thinking about a recirculation system for the VE that will flow a lot more fuell through it and then rin through a fuel cooling radiator like the Sprinter van's use. Might be a way to keep the VE alive with 14mm and 4mm cam plate. I would think adding lubricity to the fuel would help too (maybe running a little Lucas oil treatment in the fuel tank).
I am doing that now with my Jet A fuel to increase it's lubricity.

 

2 stroke is about the best additive for lubricity. I ran JP5 in my old 89', it ran great.

A fuel cooler would help keep it cool, especialy if you could increase the amount of the return. So it would have more cool fuel in and out of the pump. Some new diesels have fuel coolers on the return line to cool it before it goes into the fuel tank.

 

I'd be afraid of gelling around these parts in the winter with that kind of a setup, sadly.

 

You would need a winter by-pass.

Are there places you could tap in another return line with a pressure regulator on it, and another feed line, and circulate fuel independently of the lift pump?