Rev Limit / spark retard

Philip Lochner · Post by **Philip Lochner** » Fri Mar 24, 2006 12:22 am

I was surprised the other day when I was able to rev the V8 all the way to 6000 rpm when I had set the Lower Rev limit to 5400 and Upper rev limit to 5500 with "Max Retard" on 10.

Studying the log showed that timing is reduced BY 10 deg (from 36 down to 26) which is why not much happened.

So I thought, well obviously I must just increase the "MAx retard" figure to 30 or so but then MT2.25 came up with a message saying that a max of 13 was allowed?

Why can't I enter larger figures (which would be more effective in limiting revs)?

Kind regards
Philip
MS2/V3/fw2.35/MT2.25

jsmcortina · Post by **jsmcortina** » Fri Mar 24, 2006 5:39 am

Retard alone is rarely enough to act as a rev limiter. For a decent limit you need spark cut (which is not easily achieved with EDIS.)

James

danc8000 · Post by **danc8000** » Wed Mar 29, 2006 9:49 am

Is it possible to do reliably with EDIS James?

I've always assumed not but if there is a way I'd love to try it..

69 1/2 Six Pack Bee · Wed Mar 29, 2006 11:18 am

I use fuel cut. Seems to be the better option.

tebriel · Post by **tebriel** » Wed Mar 29, 2006 2:36 pm

is the fuel cut rev limiter built in?

69 1/2 Six Pack Bee · Post by **69 1/2 Six Pack Bee** » Wed Mar 29, 2006 2:48 pm

Tebriel,
You can set the parameters to whatever you wish.
It is built-in to the code.
Under GENERAL SETTINGS you can choose Spark Retard, Fuel Cut or none.