Soft Rev Limit & Boost
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Soft Rev Limit & Boost
According to the 2.6 Hydra users manual, the soft rev limit "begins to cut fuel events to reduce torque output and produce a “soft” limiting effect on engine speed."
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
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According to the 2.6 Hydra users manual, the soft rev limit "begins to cut fuel events to reduce torque output and produce a “soft” limiting effect on engine speed."
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
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Yes, and fine for the safe boost that OEM's use. Pushing 15+ psi on an engine not originally built for a turbo is a different scenario. If you have the capability of choosing fuel cut or ignition cut, why not choose the latter and eliminate the lean mixture risk?
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Not how fuel cut works. Typically revlimit cuts a percentage of ingnution or fuel events. If there is no fuel in cylinder, you are not lean. There is just air. Nothing to burn.
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That said, if i had the choice, i'd go with ignition as well. Mostly because i'm a ricer and think it sounds cool.
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According to the 2.6 Hydra users manual, the soft rev limit "begins to cut fuel events to reduce torque output and produce a “soft” limiting effect on engine speed."
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
Since it is a rev limiter it is typically going to be doing this at high rpm and high load (max boost).
I would think pulling fuel under those conditions, especially on a boosted car, would be a very bad idea. Am I missing something here? Should I set my hard rev limit lower than the soft and let it just cut ignition to begin with?
The purpose of soft and hard limit is for driveability.
Yah. It is cool. Actually it is frikken awesome. One of te joys of turbo car
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It washes down the cylinders, increases the chances of fouling the plugs, sends your turbine housing temps through the roof, and will add quite a bit of spool to your turbo when you might be trying to limit boost (if you are using it for boost cut and not rev-limiter).
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Right. Thanks. I looked up my Hydra manual and it describes cutting 40% of the injector cycles...
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