Fuel pressure - Page 2 - Land Rover Forums : Land Rover and Range Rover Forum
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post #16 of 17 (permalink) Old 11-26-2018, 01:32 AM
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Originally Posted by p76rangie View Post
I think you need a new calculator.

A standard reg runs from 2.0 bar to 2.5 bar. It is only the movement of 0.5 bar that is 1:1. So if you went to 1.7:1 is is 1.7x0.5 bar or 0.85 bar. So it will go between 2.0 and 2.85 instead of 2.0 to 2.5.

How is 2.85 bar way above 3.0.

Must be the "new math"?

I am also reasonably sure that the 1.7:1 still does not increase by more than 0.5 Bar, it just gets there sooner.
The 3.0 bar BMW regulator I keep mentioning should have a conversion of 43.51 psi when using 1 bar conversion equals 14.5038 psi. I recorded a bypass at 41.30 psi which I mentioned in my above reply.
Your 2.85 bar conversion to psi equates to 41.33583 psi using 1 bar equals 14.5038 psi conversion math.
This means the 41.30 regulator i'm running is slightly lower than the 2.85 bar of 41.33583 psi by 0.03583 psi or 0.00247 bar below which is 2.847 bar vs 2.85 bar maximum.
I can or my engine can live with any slight A/F ratio difference at cold start and full throttle running leaner on the oxygenated pump gas we must use.
I believe these above slight differences in pressures in bars are way below production tolerances of pressure regulators, a new 3.0 spec regulator having 2.847 bar real world bypass as example.
I'm in favor of rich before lean not seeing aluminum coming out of the tailpipes or open headers. ....~~=o&o>.....
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post #17 of 17 (permalink) Old 11-26-2018, 02:16 AM
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The basic fact is that 0.5 bar is 7.25 psi higher than the motor requires.
This means that the motor will run richer at all times except when the O2 sensor is active at cruise.
All you appear to want to debate is how much richer it will run.
Based on all the different settings I have tried on my adjustable fuel regulator, it will be running a lot richer.
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