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augusto 6k

Posted: Tue May 14, 2013 5:21 pm
by dave wheeler
hi all
hope im not covering old ground but whats the range of retardation on this unit? Ie if I set at 22`btdc what is the finished (most retarded) firing point?
regards
dve

Re: augusto 6k

Posted: Wed May 15, 2013 11:37 am
by rosscla
The generally quoted figure is 0.5 degrees of retardation per 1000 rpm for the 6k so 4000 rpm gives 2 degrees. I think it carries on retarding till you run out of revs or go bang.

I think you'd be safer with 19 degrees as your starting point, but that will depend on he state of tune and pipe as well.

The 6k / 7k thing is more to match where your engine makes peek power.

Re: augusto 6k

Posted: Wed May 15, 2013 1:54 pm
by coaster
rosscla wrote:The generally quoted figure is 0.5 degrees of retardation per 1000 rpm for the 6k so 4000 rpm gives 2 degrees. I think it carries on retarding till you run out of revs or go bang.

I think you'd be safer with 19 degrees as your starting point, but that will depend on he state of tune and pipe as well.

The 6k / 7k thing is more to match where your engine makes peek power.
I'm pretty sure that's not correct, I think the Augusto retards 6 degrees. Setting the static timing to 22 will mean that it will retard to 16 degrees and being a '6000' it will be fully retarded by 6k RPM. Happy to be corrected though 8-)

Re: augusto 6k

Posted: Wed May 15, 2013 3:34 pm
by rosscla
Also happy to be corrected but was standing on the recollection of this discussion... 8-)

Perhaps a grown up will be along to sort it out in a bit ;)

Re: augusto 6k

Posted: Wed May 15, 2013 4:45 pm
by dave wheeler
thanks guys, any grown ups out there?

Re: augusto 6k

Posted: Wed May 15, 2013 6:05 pm
by coaster
rosscla wrote:Also happy to be corrected but was standing on the recollection of this discussion... 8-)

Perhaps a grown up will be along to sort it out in a bit ;)
Interesting but I'm sure there is more to it than stated in any of the replies on that thread. I would be interested in seeing what the retard curve is like between the different Augustos. They can't all retard at the same rate or there would be no point in having a 6000, 7000 and 8000 :? My guess is that they are set to give the majority of the retard 6 or 7 degrees by the stated revs, I doubt it is 'linear'. Any continued advance after the initial 6 or 7 degrees is just a bonus safety margin. It might also explain why my EGT continues to rise as I head towards and beyond 7k rpm.

Re: augusto 6k

Posted: Wed May 15, 2013 6:46 pm
by Timbo
dave wheeler wrote:thanks guys, any grown ups out there?
I'm a grown up and I've got one fitted to my GP at the time i had it on the dyno but feck knows what it does..... :oops: