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Old 01-06-2017, 11:13 PM   #1
e30davie
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Fuel map in mS not VE

Greetings all,

Ive just got my haltech running on my m20b23, starts and idles hot or cold and free revs.

does anyone have an m20b23 or m20b25 fuel map in ms (millisecond) rather than Ve?

Im just after something to get me going, im not that experienced with engine tuning and just want to see the trends.
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Old 01-07-2017, 12:25 AM   #2
digger
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MAP or TPS?
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89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works...

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Old 01-07-2017, 01:30 AM   #3
e30davie
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Ahh good question.

MAP sensor.

Engine is non turbo as well.

Last edited by e30davie; 01-07-2017 at 01:44 AM.
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Old 01-07-2017, 02:05 AM   #4
digger
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might be of some use but maybe not

m20b31 24lb injectors

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Old 01-07-2017, 02:15 AM   #5
e30davie
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Ahh that is brilliant, thanks. That run pretty good?

I have it idling well so i might take your numbers and do some math to fill in the rest.
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Old 01-07-2017, 02:24 AM   #6
digger
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Quote:
Originally Posted by e30davie View Post
Ahh that is brilliant, thanks. That run pretty good?

I have it idling well so i might take your numbers and do some math to fill in the rest.

that did yes, was properly tuned etc, difference will be in engine spec

also note its batched fired not sequential which affects the absolute numbers
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new build thread http://www.r3vlimited.com/board/showthread.php?t=317505

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Old 01-07-2017, 02:59 AM   #7
e30davie
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Ah k cool.

Ive got mine running in semi sequential, 3 groups of 2 injectors.

Just the oem injectors, dunno whay cc they are. But idle around 850rpm is around 2.2ms.

So if i scale yours up i should at least get something to start with.
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Old 01-07-2017, 03:54 AM   #8
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mine used to idle at about 2ms, two batches of three
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Old 01-10-2017, 08:32 PM   #9
e30davie
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Ok well the map worked out reasonably well, havent put it all in as i am having trouble wiht the hot starts.

Can anyone with tuning knowledge comment on what i should be aiming for for coolant compensation and prime pulse?

as mentioned my idle is around 2ms at 850rpm.

What should i be looking at for the initial priming pulse when cold? 10ms? 50ms? 100ms? and what about when hot? does it even need a priming pulse when hot? or should it start on idling fuel?

And also what level of coolant compensation would you expect? 100% at 0 degrees centigrade? 200% at 0 degrees centigrade?

I think I am massively over fueling on hot startup, but then sometimes it starts better with more fuel.
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