Sigma pump

Youtube( redattraction pulling team) I think they have one bigger than the sigma, email them, they will get back to you.

 

Check out cyclone machine, they make pumps, just don't know if it will be big enough for what your wanting.

But I did see one on a 3406B pulling truck. The guy estimated 2500-3000 hp.

 

10k is pretty reasonable for a real Sigma pump, that is about the going rate for a "stock" Sigma. A custom built one with new parts is 15k and up.

Columbus has one of the better pumps, and if a stock Sigma isn't enough you can get one of their CNC'd pumps that is based off a Sigma but with new, larger parts. Orignal cores are getting harder to find.

Schied Diesel would be another place to call and talk with, Haisley Machine and maybe PDR.

 

so what makes these pumps so insanely expensive. On the other hand, is it possible to use a stock style pump from a bigger engine say like a locomotive or something and try to retro fit it on the smaller engine.

 

Sigma has been out of business for 40+ years and there were not many of these pumps in North America to start with = hard to find now. Supply and demand.

There are a lot of pumps that could be made to work, but it's not just size. That is, it's not just the AMOUNT of fuel that the pump can inject - it's the RATE of injection that is important for big HP and high RPM.

Loco engines run at low speed and as such their injection pumps are typically really slow because they only need to put fuel in an engine turning maybe 1500rpm - not 2,3,4,000+ RPM.

 

scheids, CDS, Haisley, st. joe or try www.pulloff they have some used ones on there some time. If you are worried about cost, then maybe you should check on the cost for the engine that needs the pump before you get too far

 

I think CDS and Hypermax are the only 2 places you can get a Sigma in the US. Not all Sigma pumps cores are the good ones, it all depends on the cam that's in them. Had a friend who was in Africa for the Air Force and was talking to CDS, looking around for cores and they told him what to look for. After about 4 years he got transferred and never found any (Africa was the last place they found any). Scheid does not do Sigmas they try and push their 12cyl pump for that class. As 69W900A said it's not the amount of fuel the Sigma injects it's how fast it injects it that makes them so mean. You've gotta pay to play, ask Haisley when they borrowed a Sigma about 2 years ago they were amazed and never looked at the 12cyl pump again. Your going to have a lot of money in an engine before you ever need to look at a Sigma.

 

These days you can get 16 mm elements to P-pump and cam can always be custom made for fast injection and high lift, you get very close to sigma.