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Forum: Diesel Performance Tuning

03-19-2008, 01:17 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

Don't know the split between the two, but the...

Don't know the split between the two, but the total is 29ml.

Forum: Diesel Performance Tuning

03-17-2008, 12:03 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

That's probably true. A significant amount of...

That's probably true. A significant amount of combustion must take place right in the bottom of the prechamber. There is insufficient time for the fuel to progress into the cylinder.

Forum: Diesel Performance Tuning

03-17-2008, 11:34 AM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

The "flow" is quite small. At 70 mph steady...

The "flow" is quite small. At 70 mph steady state, each cylinder uses .017 ml per cycle. It's not a lot of fuel. Even at maximum power, this figure might rise to .07 ml per cycle.

Forum: Diesel Performance Tuning

03-15-2008, 03:14 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

What's positively amazing about that graph is the...

What's positively amazing about that graph is the torque curve. It peaks at 3800 but stays reasonably flat all the way out to 5100 rpm.

Contrast that curve to your curve with the VNT. The torque...

Forum: Diesel Performance Tuning

03-14-2008, 05:29 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

I thought we were discussing the 617?? But,...

I thought we were discussing the 617??

But, regardless..........5400 rpm for a peak is impressive.

I'll send you three cans.............;)

Forum: Diesel Performance Tuning

03-14-2008, 10:15 AM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

Once you're past peak horsepower.........why...

Once you're past peak horsepower.........why would you go there?

Yes, if you're racing, there might be some advantages to straddling the horsepower peak upon shifts, but, as a practical...

Forum: Diesel Performance Tuning

03-13-2008, 10:34 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

While your pump may suffer from lower delivery at...

While your pump may suffer from lower delivery at higher rpm's, the fundamental problem with the nature of diesel combustion remains. The engines have difficulty in producing peak torque at engine...

Forum: Diesel Performance Tuning

03-12-2008, 11:43 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

Your own chart shows 107 hp @ 3800...

Your own chart shows 107 hp @ 3800 rpm..........that's the peak. Going higher results in lower horsepower.........as I attempted to explain above.

Going to 5000 rpm would net you about 80...

Forum: Diesel Performance Tuning

03-12-2008, 08:35 PM

Replies: 24

Summary of diesel tuning theory (mechanical injection only)

Views: 16,019

Posted By Brian Carlton

A diesel usually is on the severe downslope of...

A diesel usually is on the severe downslope of the torque curve above 3800 rpm. The rather long burn time of the fuel is a detriment. So, attempting to increase rpm in the valiant hope for more...

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