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steveo3002

anyone running a 8v with aftermarket ecu

 

id like to ask if i can see your ign map 

 

my spec is 1400 with mpi , but id be happy to hear from anyone with similar engine , or know anywhere i could ask ? 

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dvderlm

Try useasydocs.com/theory/spktable.htm ?

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dvderlm

Aldon Amethyst 11:1 compression 1263cc 75mm diameter pistons on twin carbs with 5 degrees static advance (on 95 RON fuel)

june2019Capture.JPG.f0d5d8c923933557a76f9ebfc1553e5e.JPG

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steveo3002

hmm similar numbers to what we have ...is that dyno tuned or home made?

 

mate and mine feels pretty dull 

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dvderlm

Homemade. About a year of refining on favourite roads, seat of pants and AFR datalogger plus camera, then backed off a bit at top end  after giving up on Momentum 99 when 95 Unleaded became 5% ethanol too.

Waiting for a sensible knock sensor solution (Speeduino speedyknock?)

http://www.bylund-automotive.com/store/knock_shield.html 

?

Edited by dvderlm
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steveo3002

and you feel its better than stock?

 

mate and myself are messing with our 3f and they feel a bit dull /slow vs a well running standard car 

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dvderlm

It is now better than stock.  The stock Bosch Dignition and MAP sensor on the GK could not cope with the twin carbs' reduced vacuum and had a 6800rpm rev limiter (annoying hard cut).

I did try swapping the Dignition quartz crystal for a 7150rpm limit originally with a big Weber twin choke carb, but this was unsatisfactory at light load once 

I moved to twin Dellorto DHLA. Amethyst has soft cut beginning 500rpm below limit.

I'd like the below 1000rpm behaviour to be more linear, that needs a firmware upgrade for a bug fix to v1.84, apparently says Osney.

 

See also this Imp forum ignition map

 

 

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dvderlm

It is now better than stock.  The stock Bosch Dignition ( www.volkspage.net/technik/ssp/ssp/SSP_48.PDF page 9 )and MAP sensor on the GK could not cope with the twin carbs' reduced vacuum and had a 6800rpm rev limiter (annoying hard cut).

I did try swapping the Dignition quartz crystal for a 7150rpm limit originally with a big Weber twin choke carb, but this was unsatisfactory at light load once 

I moved to twin Dellorto DHLA. Amethyst has soft cut beginning 500rpm below limit.

I'd like the below 1000rpm behaviour to be more linear, that needs a firmware upgrade for a bug fix to v1.84, apparently says Osney.

 

See also this Imp forum ignition map

 

 

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