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Bee*r Rev Limit = Very Rough?

bobba

By bobba,
in Engines & Forced Induction

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bobba Enthusiast

bobba

Posted
Posted

Hey guys,

I've chipped my R32 RB20DET and it got rid of the rev limiter. So I got a bee*r powerbuilder (spark cut) and am trying to use that instead.

It's a nice unit and works as described, but even on the least 'loud' setting - ie position 1 on the dial, it makes a hell of a bang from the exhaust... Which I'm guessing isn't very nice to the engine / turbo / cat / whatever else.

Is there something wrong? Does anyone else have one and it's the same? I'm sure not putting the setting up any further!

I'm not sure whether they are just like this, or whether the chipped ECU confuses it etc, so any help / info would really be appreciated.

Thanks in advance for any replies ;)

Bobby.

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Douse Collaborator

Douse

Posted
Posted
Thats what they do.. and they wont do your exhaust wheel any favours either lol..

Yeah I have heard bad things about these, but can't talk from experience. May be a whole lot of hearsay for all I know..

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
they say its safer because its still putting fuel into the cylinder so its not like detonation, its also why it goes bang because of the fuel getting ignited, i love these things

Well how about we are telling you that it isnt?

Ceramic wheels & heat are the two worst enemies of stock skyline turbos.

Dumping in the extra fuel, makes "the bang" and this is raising the temps which will most certainly decrease the life of the turbo, cat and anything else in the way.

Plus with all the 'firing' going on, who knows what other damage is being done in the head with all that fuel buring when it shouldnt be.

Whilst the Nissan rev limiter isnt exactly friendly, the way people use the bee-r ones is even worse

sly32 Proficient

sly32

Posted
Posted (edited)
Well how about we are telling you that it isnt?

Ceramic wheels & heat are the two worst enemies of stock skyline turbos.

Dumping in the extra fuel, makes "the bang" and this is raising the temps which will most certainly decrease the life of the turbo, cat and anything else in the way.

Plus with all the 'firing' going on, who knows what other damage is being done in the head with all that fuel buring when it shouldnt be.

Whilst the Nissan rev limiter isnt exactly friendly, the way people use the bee-r ones is even worse

fair enough, i cant remember where i read it but they were just saying about the fuel, and how its better then detonation, but yeah i never really thought about anything else which comes along with this type of limiter,

so to add to this, can i ask a list of limiters or a limiter which would be the safest? or there isnt really one in the long run?

Cheers

EDIT: this is where i read it,

This is Bee*R’s popular two-stage ignition cutting rev-limiter. It is used to prevent damage arising from over-revving your engine. Part of the reason for its popularity is the large flames and loud bangs it produces from the exhaust when active!

The way in which it works differs from the factory rev limiter in that it is an ignition cut, as opposed to a fuel cut. The reason for this is because if an engine (particularly turbocharged) regularly hits a fuel-cut rev limit (such as in high performance driving, or particularly drifting) engine damage can arise due to the lean condition produced when the original ECU shuts off the fuel pump. The BEE*R rev-limiter allows fuel to pass into the engine still, limiting engine speed by disabling the ignition signal. The Bee*R rev limiter is fully adjustable in 500rpm increments, for safety reasons allowing only a lower rev-limit to be configured than standard. If you have spent a lot of money tuning your engine, or are running at high RPM’s for extended periods of time, it could be recommended to run a lower rev-limit to prolong engine life. Both Formula 1 and JGTC cars use ignition cutting rev limiters, so it is a fully race proven concept.

The Bee*R can also be used as a “two stage rev limiter”, as an aid for launching your car. The Bee*R is configurable for two different rev-limits. A lower rev limit can be activated by a switch, the handbrake switch often being used. This configurable lower limit, can be set to the optimum RPM to launch your particular car from in 500rpm increments. When the handbrake is released, the usual rev limit comes into action, allowing quick launches, and full performance down the strip.

The Bee*R rev-limiter has another final neat feature. The gain control knob allows you to adjust the frequency of the ignition cut. This in turn changes the frequency and sound of the flames and bangs from your exhaust!

Available for use with all rotary, 4 and 6 cylinder engines.

Edited by sly32
bobba Enthusiast

bobba

Posted
  • Author
Posted

Hey guys,

Thanks for the feedback.

I'm aware they are supposed to make all the noise, but if position 1 sounds like this then position 9 must blow the back half of the car off. I just thought it could be a bit tamer than this.

And, as I said, it's chipped and does not have a factory rev limit anymore, so I consider this a safer option than doing 9500rpm by accident!

Lol at the maccas / kebab shop.

Cheers,

Bobby.

joeyjoejoejuniorshabadoo Grand Master

joeyjoejoejuniorshabadoo

Posted
Posted
please tell me how they kill oil pumps mate

my guess is that they dont like the massive vibrations caused by the chinese new year in your exhaust...

was told this by ben/racepace so i'm not willing to risk it

NZM.031 Grand Master

NZM.031

Posted
Posted

i love these limiters... but i like my engine more... its basically the same sorta thing as antilag but different.. haha. engines/turbos hate antilag

i would think that setting 1 would be loud as i think its the longest delay so more fuel would be pumped into it and a bigger bang. the higher the setting, the shorter the cut, the more frequent but less violent bangs.

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