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Fitting Two-Step Limiter

engine electrical

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#1 IeuanStich35

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Posted 06 June 2018 - 11:22 PM

Hi all,

I’ve been looking into fitting a rev limiter to my 1275cc Mini engine, and was wondering if there is a method, and any advantages, of fitting a two-step system (say step one at 2000rpm and step two just before the redline), or to simply install a single step limiter at the coil?

Thanks, I

#2 Moke Spider

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Posted 07 June 2018 - 03:44 AM

I think you may need to post up some more info as it is obscure but clearly, you have a reason for asking.

 

Most who run them just use a single stage, though you can get 'hard' rev limiters and 'soft' ones.



#3 dotmatrix

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Posted 07 June 2018 - 07:02 AM

I have seen on youtube that people with turbos use the low rpm rev limit to build up pressure when at the start line and then disable the low revlimit once the car is moving.

 

I would guess you could use it to limit wheelspin when taking off in a non turbo car, but I think you will take off quicker by just learning to take off while just at the point of wheelspin.



#4 Rorf

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Posted 07 June 2018 - 07:08 AM

Limiters - first step at 2000rpm for the wife and second step 9000rpm for the main man :lol:



#5 Dusky

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Posted 07 June 2018 - 07:17 AM

An omex rev limiter with launch control will do just that. Useless but fun.

#6 nicklouse

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Posted 07 June 2018 - 07:29 AM

Hi all,

I’ve been looking into fitting a rev limiter to my 1275cc Mini engine, and was wondering if there is a method, and any advantages, of fitting a two-step system (say step one at 2000rpm and step two just before the redline), or to simply install a single step limiter at the coil?

Thanks, I

do you have a turbo fitted?



#7 Midas Mk1

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Posted 07 June 2018 - 08:02 AM

Omex Launch control module, I have one that im about to fit to mine. Setting limiter at 7.2, launch at 4.5k to help get off the line for emergency starts with the sccr box. 



#8 nicklouse

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Posted 07 June 2018 - 08:07 AM

just been reading up on these. what a strange set up. much prefer the ones that measure wheel slip and can be set with a 20% figure. as you do want a limited amount of slip circa 20% for optimal launch.



#9 Moke Spider

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Posted 07 June 2018 - 08:53 AM

just been reading up on these. what a strange set up. much prefer the ones that measure wheel slip and can be set with a 20% figure. as you do want a limited amount of slip circa 20% for optimal launch.

 

I'd suggest just learn to drive the beast off the tacho,,,,,,



#10 nicklouse

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Posted 07 June 2018 - 09:01 AM

 

just been reading up on these. what a strange set up. much prefer the ones that measure wheel slip and can be set with a 20% figure. as you do want a limited amount of slip circa 20% for optimal launch.

 

I'd suggest just learn to drive the beast off the tacho,,,,,,

 

there is that. but when you can not beat the launch times with some slip dialed in then what is the point? but the OMEX one seems, well, pointless.



#11 IeuanStich35

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Posted 07 June 2018 - 10:00 PM

Thanks to all, yes my question was rather vague in hindsight XD i’m running a non-turbo, and the two-step idea was more for fun than for competition (although it will obviously have benefits off the line too). I will do some research into the OMEX system suggested, thank you to all :)

#12 Cooperman

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Posted 08 June 2018 - 09:12 AM

I thought overcoming the limitations of the old technology by use of the brain/foot/tacho combination was part of the fun of historic motorsport in old classic cars. It certainly is in mine.



#13 mr3speed

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Posted 08 June 2018 - 09:25 AM

The flames are a fun side effect with the omex, i have one fitted to my GT-four and 1380Mini

#14 Curley

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Posted 11 June 2018 - 06:32 PM

Someone has been watching too much television..... Drag racers use a two-step in the fashion you mention to maintain boost in their turbo cars during staging.

 

A rev-limiter on the high end is not an entirely bad idea but overkill for most road going engines.







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