Competition Sigma's Competitor

[ThrottleJockey]

I know it's a Ford, but Ben Miller's Mack V-8 pump is pretty cool, for the ingenuity alone.



Sigmas and high dollar P-7100s notwithstanding, is there anyone playing around with anything that used to grace the side of 855 or 900 cubic inches of OTR engine block for us guys that like to keep 'em straight and down to 6 cylinders?

 

[ThrottleJockey]

Jeez. 17mm plungers, huh? What's the biggest you can get on a P pump? 14mm or so?



Those Sigmas are the cat's @$$!

 

[WUnderwood]

lotta $$ though, but WELL worth it, for those who need it

 

[JFaulkner]

It's not just the amount of fuel, but how it delivers it. It's a totally different animal.

 

[DieselNasty]

Is a sigma some kind of p pump by a different company?

 

[Highfinance97]

Is a sigma some kind of p pump by a different company?

Yes Columbus Diesel supply



Sigma Pump


Michael

 

[DieselNasty]

Wow that is sweet! I realize the difference in the the difference in the plunger/ barrel sizes but other then that what is the difference in power delivery vs a p-pump?

 

[JFaulkner]

Don't forget about the custom built "billet sigma" for a mere $15k



You would have to talk to Columbus Diesel about why they're better. The only downfall is they have NO GOVERNOR, so if something breaks you better hope your air/fuel kill works. (well and the fact the company that originally built them in France hasn't been in business for like 30yrs so supply and demand is part of the price. )

 

[KLockliear]

Killer pump. We had one on the "next engine" for the drag program. Big thing is that a P7100 injects it's fuel in 32* of crank angle, where the Sigma does it in 1/2 the time. Pressure is way up and delivery is much quicker, so more where you want it to build max cylinder pressure.

 

[DieselNasty]

So basically it takes a sigma half the time to inject the kind of fuel as a P7100, your saying less timing?

 

[ThrottleJockey]

Jeez!! I was wrong!



Dang thing can go up to 19mm plungers!



I called Schied to ask about 14mm plungers in a P 7100 and I got an earful. #@$%!:-laf

 

[Hammer]

We had one on the "next engine" for the drag program.

Keith...

Where did that truck ever disappear too????

 

[Timebomb]

Keith...

Where did that truck ever disappear too????

I was thinking the same thing

 

[RacinDuallie]

John Russin of Bhudda Power is now the current owner of the ol Edge Truck... ...

 

[KLockliear]

So basically it takes a sigma half the time to inject the kind of fuel as a P7100, your saying less timing?

Timing, as we speak about it, refers to the point in crankshaft revolution at which the pump/injectors begin to inject fuel into the cylinder. The Sigma will push it's fuel amount to the injector in 1/2 as many crankshaft degrees as a std 7100.

John Russin of Bhudda Power is now the current owner of the ol Edge Truck... ...

There you go.

 

[bubba1]

Sorry guy's but that is BUDDHA POWER.

 

[DieselNasty]

Yes thats what I meant i guess I could have asked the question better.

 

[zstroken]

Timing, as we speak about it, refers to the point in crankshaft revolution at which the pump/injectors begin to inject fuel into the cylinder. The Sigma will push it's fuel amount to the injector in 1/2 as many crankshaft degrees as a std 7100.







There you go.

What about a modified p7100? What about a p3000?

 

[ThrottleJockey]

What about a modified p7100? What about a p3000?

I just noticed he did say 'std' p7100. I wonder about how a Scheid 14mm stacks up to the mighty Sigma? I know it's behind, but how far?

 

[JFaulkner]

I just noticed he did say 'std' p7100. I wonder about how a Scheid 14mm stacks up to the mighty Sigma? I know it's behind, but how far?

WAY behind. Having seen both (wasn't A Scheid pump but a CDS P7100) on the same truck it's no comparison. Not to mention how problematic a heavily modded P pump is. With them regardless of brand it's not if the pump sticks, it's when.