Injector theory

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Oct 25, 2006 | 11:49 AM

#16

Dockboy

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My limiter is set at 3800 but I only spin it to about 3600.

Remeber, you can not compare our motors with it's existing fueling system to a mechanically injected Cummins when it comes to rpm!!

As was mentioned previously, our rpms are limited with the existing HUEI system because the electronic and mechanical parts of the system just aren't capable of working fast enough together to produce a good injection at 5-6000 rpm.

Oct 25, 2006 | 12:09 PM

#17

Dockboy

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Quote:

Originally Posted by Hiflyer746

Well I'm not super into high RPM's as anytime you spin faster. . . you decrease life. Tim

Not really true!!

The ONLY way we are going to be able to make more than ~800 hp and make them LIVE is to figure out how to RAISE the rpm!! By raising the rpm, and making the power up there, you could make higher HP numbers without the bone crushing TQ number that is breaking parts.

Oct 25, 2006 | 08:11 PM

#18

Hiflyer746

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turn faster

Dockboy, interesting point. . . so how do you raise the RPMs? So lets say that a motor makes 600 horse and 1200 ft/lbs of torque at 3600 rpm. is it any better to be making 800 horse and comperable torque at 5000 rpm?
Thanks. Tim

Oct 25, 2006 | 08:13 PM

#19

Hiflyer746

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needle pressure

Still looking for what the stock nozzle needle pressure opens up at?

Oct 25, 2006 | 09:01 PM

#20

Dockboy

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Quote:

Originally Posted by Hiflyer746

Redesign the fueling system.

You wont make near 1200 ft lbs at 5000 rpm

Oct 25, 2006 | 09:39 PM

#21

Hiflyer746

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fueling

Common rail? THat kind of redesign?
tim

Oct 26, 2006 | 06:44 PM

#22

lukecline

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From: minneapolis, ks

i think common rail is probably a good start. We can turn those RPM's but its said that injector pulse width cant be wide enough to make power up that high. I know there was some 5k-6k rpm testing awhile back, havent heard anything for awhile so i dont know how that went.

Oct 26, 2006 | 10:28 PM

#23

Tenn01PSD350

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From: Middle Tennessee

I feel compelled to note that our injection system is a good one for most users up to a point. When ya want to get silly, or get serious, you can look at the stock injector like a set of valve springs where float would occur at a certain RPM. Float as we all know is bad and don't think it won't happen in the injector return spring. At least there wouldn't be piston to valve contact, just a stumbling inefficient ponderous beast.

As a matter of fact, I doubt it would really float because it simply could not provide the fuel to make it happen. No further RPMs in other words. Just can't get there.