Sigma pump

joed: I dont believe you will bore anyone with your info. Please continue! Thanks for the information and bore us some more with more information...

 

Most P-pumps I've dealt with have custom cams in them, but the cam itself makes little difference in rate of injection compared to the top end parts. The cam makes a tremendous difference in pressure and volume ability.

Ya, you can get a lot of HighPo parts for the P-7100 series these days and I agree for most people you can get close enough to a Sigma that a P-pump will do. But you still can't really match a Sigma's injection rate even with custom scroll/rack work on a Bosch.

And then of course just as there are custom parts for the Bosch so are there custom parts for Sigma based pumps.

For most a P pump will do just fine as you say.

 

If you want to throw up a little, a local guy had a very heavily modified tractor with a CDS billet Sigma. Engine threw a rod which is bad enough but the rod hit the pump and ruined it also. Needless to say the new engine had a 1" steel plate between the block and the new pump.:smt078

 

OUCH, that had to hurt the wallet. What kind of engine, B model, CAT, tractor?

 

Thanks joed9106: Nothing boring there, and in excellent english....
Please keep "boring" us........