idle kpa?
so every body has said to tune idle for lowest kpa possible, which is cool. my question is what kind of numbers are you guys seeing and are you happy with the idle quality. I 've gotten a pretty steady 850 rpm idle at about 32-34 kpa. I can get a bit more vac. but the quality of the idle gets pretty crappy no matter what I try. so at what point have you guys called it good and stop futzing with it?
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Best idle IMO is running rich with lots of timing advance. I run ~11.0:1 AFR at 17* BTDC and idle ~26kPa and it's rock solid. But I have a lot of headwork that seems to contribute to the high vacuum. Still my idle sucks if I go over 12:1 AFRs and I loose vacuum.
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I tend to idle between 28-30 at 900-950 RPM. This is at about 17° BTDC and AFRs cycling through the low 14s to low 15s.
I really wouldn't go too crazy obsessing over idle MAP. It's just not that big a deal. Pat, why the crazy-rich AFRs? Aren't you running HR code? |
I'm still waiting for my lc-1 to come back from innovate (defective) so I have no idea what afr I'm at. It is richened up a bit from the pnp base map though. and about 18* timing.
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Originally Posted by Joe Perez
(Post 323959)
I tend to idle between 28-30 at 900-950 RPM. This is at about 17° BTDC and AFRs cycling through the low 14s to low 15s.
I really wouldn't go too crazy obsessing over idle MAP. It's just not that big a deal. Pat, why the crazy-rich AFRs? Aren't you running HR code? |
My idle manifold pressure is about 16kpa. Not sure why it is that low but, it was like that even before i unplugged the IAC.
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Originally Posted by wes65
(Post 323986)
My idle manifold pressure is about 16kpa. Not sure why it is that low but, it was like that even before i unplugged the IAC.
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that's not low, that's a LOT of vacuum
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Originally Posted by Braineack
(Post 323991)
that's not low, that's a LOT of vacuum
Originally Posted by paul
(Post 323989)
Holy fuck! 16kpa is insane! You can't even enter a value that low in the VE talbe y axis. Are you sure your map sensor is working properly? With car off does it show atmospheric pressure, ie does your BARO meet MAP with engine not running? I've seen 2 of the MapDaddy sensors go bad which is what you are using in your 94/95 MSPNP.
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do you have a 4-bar sensor but are setup for a 250map?
16 x 2 = 32 |
No need to log. Just open up Megatune. choose engine MAP gauge and Baro gauge. they should match when engine is not running.
My BARO here is 101. My map sensor reading got lower and lower. I finally switched it out when I as seeing 94 vs 101. A friend's did the same but got as low as 76. DIYAutotune replaced the sensors under warranty. |
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haha you nailed it. It is showing 86. fwiw, here are the logs. You can see me go WOT, a guy in a civic tried to race lol.
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So get in touch with the guys at DIY and tell them your issue.
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Originally Posted by paul
(Post 324004)
So get in touch with the guys at DIY and tell them your issue.
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no sweat, it looks as though we've managed to discover a problem through discussion. ain't that what it's all about?
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Originally Posted by dynokiller90
(Post 324030)
no sweat, it looks as though we've managed to discover a problem through discussion. ain't that what it's all about?
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