Engine Specific Info and Questions > Non VW Group Diesel

VE Pump modifications BMW 524/324

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klang:
Hello,

I'm currently putting my new engine together. With a couple of modifications to the block and head to withstand the increased boostpressure.
Its a 6 cyl BMW M21D24, with a VE pump.

Now I've come to the point were I have to modify my pump and I've run in to some problems.

The shop that is suppose to put my pump together refuses to go bigger than 11mm plunger.
He used to build pumps with 12mm, but he says that the "high" rpms is going to make it run bad, the 12mm is only for cummins.. bla bla bla...
And also that my cambelt will shread in to pieces.

Then I spoke to another shop, who offered complete kits, pump + injectors.
They see no problems whatsoever with 12mm plunger, and they promise 400hp. But they limit the pump to 5000rpm, which I can accept...

Who is correct?

I dont want to go 11mm.. thats 180whp. Not enough. Then I might aswell spend my money into a gasser.


I have also seen 14mm plunger/camplate kits. Is this just ridiculous? I guess this is only to cummins... That will just spread my engine all over the highway ;)
High rpm can I go with this? 1500? ;)

http://www.rocken-tech.com/RotorHeads.html


The engine is going into a E30, and its only for fun... NOT a daily driver.


What do you guys think?


Regards,
Patrik

Sweden

burn_your_money:
If the shop is promising 400 WHP with a money back guarantee you should go that route. I don't think your engine has the displacement for 400hp at 5000 though.

klang:
Okey.

I guess they mean 400hp from the engine, not whp though.
But the pricetag on the 400hp pump is.. BIG..


But will the pump/belt hold together?

Regards

burn_your_money:
There are hundreds of ways to build a pump. If they build it correctly then yeah it should last

Alleslowbuged:
Hi,

i have also a 524TD in a E28 from 1987 and have actual reach the 200HP, still with the original plunger and with 1.6 bar boost.
To come up with that number (still original bottom end) it is my third cylinder head and i actual i drive a metal head gasket from "gasket to go". If you really wand to get that huge hp numbers, i would advice to order also a metal head gasket (if you not have one up to know).

With a unmodded pump, the maxium peak power is something in the range of 190hp. I will update the pump within the next 2 month with a 12mm plunger and will speed up higher than 5000rpm for sure. If you have a good core and a 12mm plunger, i could also build a pump for you with extended hydraulic advance timing device and governor mod.

I do not think that 400hp will be reliable, because the inline 6 zylinder is hard for sealing. For my little 200hp setup i still need arp studs.

Best Regards

Regarding you question, go ahead with a 12mm plunger and more than 2mm lift camplate combined with a matching governor.       

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