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Post Info TOPIC: Pit Lane Speed Limiter w/ 2 stage limiter?


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Pit Lane Speed Limiter w/ 2 stage limiter?


Experts,

I have been using ECU Editor for some time on Busa engined sports racers, and have moved to endurance racing (60, 90, 180 minute races with the possibiltiy of a 13 hour race later this year).  All have mandatory pit stops, and a 45mph pit lane speed limit.  With the availabily of the two stage limiter based on the clutch signal, I'm wondering if anyone can forsee issues using this feature as a pit lane speed limiter.

My plan is to determine the appropriate RPM for 45mph (or slightly below) in say 3rd gear. Wire a momentary contact switch to the CLT pin on the ECU such that when the momentary is pushed it will connect the pin to ground.  Then set the 2 stage limiter to the desired RPM, and zero out (disable, etc) all of the other "Dragtools" like stuff.

Naturally if there is a better way to do this, I'm all ears.

Thanks in advance.

-Matt

PS - Apologies if it's been discussed before.  I searched and found nothing.



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   Matt,  This could be done pretty easy by using the new WRT software and set the neutral rev limit to your desired RPM, Splice in to the neutral wire (blue) and go to a momentary switch to ground,  When the switch is activated the lower rev limit takes over and you have your speed limit, Talk to the guy who modified your harness, He can help you if you have any questions,  I know him and he is a real nice guywink

 

   Red Racer 1



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I'd be worried that, if in soft cut, it just go lean in those cylinders. Probably not meant to maintain that cut for long (relatively) periods. And unlike fly by wire throttle control, where this would work great, would the driver tend to be more into the throttle making it worse?

Perhaps same idea but neuter timing at the same rpm, at least the car won't be so zippy and would be pretty doggy holding the driver back. May actually help the car cool down some since most all the fire would be going out the pipe.

Something to try or combination of both.

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Turning money into smoke and noise since 2006


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Thanks for the insight guys. As for driver being too much into the throttle, luckily the ECU man, mechanic and driver are all very closely related, so getting him under control should be fairly straight forward. :) Pulling timing along with setting a limiter might be doable too.

I like the neutral switch idea too. I'll check the wiring for both (neutral and clutch) and see which looks less nasty.

Thanks again!

PS - Red Racer 1, I owe you money.  I'll give you a call Monday.



-- Edited by Matt Graham on Sunday 3rd of February 2013 03:29:45 PM

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