Dear S2000ophiles,

No, I havent gone bananas. I'm intending to use an S2000 engine in a race class that requires a control 8000 RPM limit which is below the factory 9000rpm. This is somewhat below the factory limit, but only 300 rpm below peak power. For other classes I'll be allowed to run unmuzzled.

I'm using the factory engine management. Has anyone successfully fitted a supplemental rpm limiter. I've found a few which can handle 2 coils so may just have to fit 2 of them, or hope that cutting just 2 of the coils is enough.

Now to go and put on my straight jacket in preparation for the "What the ???" responses.

 

Hey Chris,

I have a friend who has a MOTEC on his s2k. He had it tuned byt one of the guys who runs an s2000 in GTP. As you are probably aware S2000's in GTP have to run a lower rev limit so he would be able to help you out, although come to think of it that would just be a simple adjustment on the Motec.

But, Jaycar electronics sell a simple rev limiter/three stage shift light kit for a measly $35AUD. I built and installed one on a friends S2000 utilising only the shift light function.

 

msd also makes a rev limiter box that you can buy

 

Thanks for the info. Does the msd unit with with 4 coil systems?

I have a spare Autronic SMC computer but was hoping to use the Honda ECU if possible. The aftermarket rpm limiters I have found have the following limitations

1. Most are designed to work with a single coil system, some work with 2 coils.

2. The few I have looked at have a minimum rpm limit of 5000 igniter pulses/min which is 2500rpm on a 4 cylinder motor, or 10000rpm on a motor with 4 coils as each coil/igniter only fires every second revolution.

A good rpm limiter is progressive and incrementally interrupts the spark so you dont bang into the limiter and dig your teeth into the steering wheel. ( and upset the car).

I was hoping that someone may have come across a 4 coil compatable unit before I start rigging up diode bridges and extra output transistors to lesser rpm limiter.

 

A valet key comes with the S2000 so that other people can't get in our trunks or glove boxes. I sure wish Honda would have made it so the engine would rev limit at about 5500rpm if the valet key was inserted. That would greatly reduce the possibility of abuse at the hands of dealerships and fancy restaurants.

 

Cutting the RPM limit on the S2000 will slow it down quite a bit. Redoing the cams and VTEC point would help...but you'd need custom stuff. Torquey motors usually suffer less in the case of restricted RPMs.

Stan

 

[QUOTE]Originally posted by Sheister
[B]A valet key comes with the S2000 so that other people can't get in our trunks or glove boxes.