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Old 09-25-2008, 12:31 PM   #1
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Default Help with Accel Enrich

Does anybody have any good values for a 1.8 running 460cc injectors?

I start at what I think is really low, and it sucks to drive, so I increase it until I get to something that I think is really high, but it never gets better.

my low end has been around .8ms at .8v/s and the high end has been 7.0ms at 8v/s.

FWIW, the WB tells me I have a lean spike whenever I hit the gas, but longer than 8ms seems ridiculous to me.

And don't tell me to search. I did and didn't come up with much. If it's out there, either tell me where, or what to search for because I'm out of searching ideas.

Oh, I'm running TPSdot right now, but I'm open to trying MAPdot if there are values for that.
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Old 09-25-2008, 04:21 PM   #2
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Same issue here. Will post logs and findings in the following days.
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Old 09-25-2008, 04:25 PM   #3
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Old 09-25-2008, 04:28 PM   #4
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@pat: your settings are MS2, most are MS1 users. I used your MAPdot part today and think I need something better. Not conclusive yet.
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Old 09-25-2008, 10:52 PM   #5
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Quote:
Originally Posted by Spookyfish View Post
@pat: your settings are MS2, most are MS1 users.
Volts are volts, and milliseconds are milliseconds. Neither unit of measure knows the difference between C and 68k assembly.
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Old 09-25-2008, 11:00 PM   #6
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Quote:
Originally Posted by Spookyfish View Post
@pat: your settings are MS2, most are MS1 users. I used your MAPdot part today and think I need something better. Not conclusive yet.
My map settings are for 550cc injectors running 62 PSI fuel pressure. That's more like running 650cc as the 550cc is rated at 43PSI. So because I ran much larger injectors, those values on your injectors will be low. You will have to increase the amount of fuel. Start at the bottom. Just barely tap the throttle. In MS2, you can see this bar graph jump up and down as you do this, showing which values in the acceleration enrichment chart are being used. Figure out how much throttle to apply to get into the first box only. Now do this and look at the Air/fuel ratio gauge in megatune and see if you spike lean. (if you are running my values you will certainly be going lean). So start adding fuel. Once you get it reving better, start reving it harder to get into the bigger cells and tune them. It took me about 45 minutes of reving the motor from idle to 2K to get those values.
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Old 09-26-2008, 02:54 AM   #7
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@pat: Ah, there is a difference. Did you do that stationary. I mean: 0 mph or does the engine need to be loaded?
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Old 09-26-2008, 03:10 AM   #8
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Just sitting at idle at the end of a dead end road. Just reving it from idle to 2K mostly.
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