Give me ideas how to setup a nice revlimiter

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Mobne_s13
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Joined: Sun May 25, 2008 8:56 pm

Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Mon Sep 25, 2017 10:40 pm

At the moment I'm having fuel hard cut with 300rpm before fuel return.

I don't like the sound of it. Any one have some nice settings for a rev limiter?

Cutting ignition is not an option with catalytic converter.

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blakebonkofsky
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Re: Give me ideas how to setup a nice revlimiter

Postby blakebonkofsky » Tue Sep 26, 2017 4:34 am

Do you have the cut set to hard or soft?

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HaltechMatthew
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Re: Give me ideas how to setup a nice revlimiter

Postby HaltechMatthew » Tue Sep 26, 2017 1:16 pm

Ignition Soft is what most should be using. Fuel will always be delayed in both direction because it is never delivered immediately.

Mobne_s13
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Re: Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Tue Sep 26, 2017 3:42 pm

blakebonkofsky wrote:Do you have the cut set to hard or soft?


"Fuel hard cut"

Mobne_s13
Posts: 259
Joined: Sun May 25, 2008 8:56 pm

Re: Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Tue Sep 26, 2017 3:44 pm

HaltechMatthew wrote:Ignition Soft is what most should be using. Fuel will always be delayed in both direction because it is never delivered immediately.



How wide should the "hysterics" be?

I want the power to be totally cut at 8000rpm.

How many rpm before that should first cylinder cut on an inline 6? What's a good starting point here :)

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blakebonkofsky
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Re: Give me ideas how to setup a nice revlimiter

Postby blakebonkofsky » Tue Sep 26, 2017 6:03 pm

Mobne_s13 wrote:
blakebonkofsky wrote:Do you have the cut set to hard or soft?


"Fuel hard cut"


If it's set to hard cut, you are going to get a "hard" rev limiter. If you are dead set against ignition cut, you could at least do a soft fuel cut, as that will progressively cut cylinders instead of all at once.

Mobne_s13
Posts: 259
Joined: Sun May 25, 2008 8:56 pm

Re: Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Tue Sep 26, 2017 7:41 pm

I know the difference between them.

What I want to know is what people run and how it works for them. And how large span between the first cut and the last.

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blakebonkofsky
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Re: Give me ideas how to setup a nice revlimiter

Postby blakebonkofsky » Thu Sep 28, 2017 4:09 am

Mobne_s13 wrote:I know the difference between them.

What I want to know is what people run and how it works for them. And how large span between the first cut and the last.


With a hard cut, there is no range of cylinders being cut. if you have the limiter set to 8,000, its going to run up to that speed and then cut everything at once, waiting until the engine drops below 7700 (300 rpm hysteresis) before restoring all cylinders at once.

Soft cut does not use any kind of configurable hysteresis, at least not on the newer firmwares.

Mobne_s13
Posts: 259
Joined: Sun May 25, 2008 8:56 pm

Re: Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Thu Sep 28, 2017 8:28 pm

Ok Nice. So the soft cut is only one setting now a days? Will try it :)

Mobne_s13
Posts: 259
Joined: Sun May 25, 2008 8:56 pm

Re: Give me ideas how to setup a nice revlimiter

Postby Mobne_s13 » Thu Oct 05, 2017 3:56 am

I have been testing some tonight.

The soft cut is what it says, only one setting and I don’t really hear the limiter it just stops reving.

I ended up with an fuel hard cut with 100rpm range. Gave a more classic sound.


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