CAJ Innovations Forums - It's a bit rich ( starts )

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It's a bit rich ( starts ) (Read 3884 times)

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It's a bit rich ( starts )
12/11/15 at 07:42:33

I usually get quite a few OEM ECUs but not often do I get one that suits my bikes.
I recently got one to suit my Breva 750. It provides a good opportunity to compare against MyECU.

The first thing that struck me was how much easier the OEM ECU started the bike. Mine were becoming difficult starters requiring special procedures.

So I thought I'd focus on getting the start better. Its seems that my priming was very rich. Below are the before and after tables for my Cali 1100. The original figures were nearly twice what they needed to be.
The stage two cranking needed a little more fuel.
The start is now on par the the OEM ECU.

#Temp C   -30   -20   -10     0    10    20    25    30    40    50    60    70    80    90   100   110   125
Prime      16    16    15    14    13    12    11     8     7     6     6     6
Crank      80    70    65    65    60    60    50    50    35    25    20    15    15    15    15     0

to
Prime      15    15    12     9     7     6     6     6     6     6     5     5
Crank      80    70    70    70    70    70    55    50    35    25    20    15    15    15    15     0

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Bluey

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Re: It's a bit rich ( starts )
Reply #1 - 12/15/15 at 07:49:24

Yes, this was my experience from the base map you gave me too. I also noticed that if you can give the bike more air by opening the butterflies when cranking (cos myECU ignores throttle on crank) i got a more vigorous start which is what got me trying less prime. In a car they would use an idle air control valve to let the computer add or remove air as well as fuel...

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sign216 Full Member Offline Posts: 176	Re: It's a bit rich ( starts ) Reply #2 - 12/15/15 at 10:59:56 Thanks for this update. I've noticed that starting was not as easy as it could be, and this gives me a direction to go in with the map. Re the starts: I had a Harley rider point out that his bike started easier. It was shameful.
Back to top	« Last Edit: 12/15/15 at 11:01:21 by sign216 » IP Logged

JamesW

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Re: It's a bit rich ( starts )
Reply #3 - 12/22/15 at 20:18:54

Cut and pasted these prime and crank values into Razsport map last week and went for a 420k ride (Kandos for coffee and Mudgee for lunch), cold start was bad but no problems when warm, went back to the Raz map this evening, looks like a run to Gosford Thursday morning through Wollombi, Kulnurra and drop down into Yarramalong. Starts on Raz map are not too bad with a bit of throttle until it warms up. I think a middle ground between the 2 start maps will see improvement.
This is for a Daytona RS with full Staintune system, K&N and tps set at 150mv.

1996 Moto Guzzi Daytona RS. Full Staintune system, K&N and MY16M ecu.

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