Mugen ECU question
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From: WA
In another post, Greg mentioned that the Mugen ECU equipped cars pulled away from non-Mugen ECU cars and that the Mugen ECU provides better low end response - is this an effect just purely from the ECU change? Or do headers, exhause, etc etc have something to do with that as well?
Does anyone have an ECU only dyno sheet?
Does anyone have an ECU only dyno sheet?
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From: Austin
I think the VTEC kicks in a little earlier. Pulling away wouldn't surprise me. The leaning out commentary was a surprise though, but I'm curious by how much.
Has anyone used the Mugen or Spoon ECU's with a V-AFC?
Has anyone used the Mugen or Spoon ECU's with a V-AFC?
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From: On the lakefront...
I heard my name...so here I am.
No, VTEC engagement is NOT controled by the ECU. Things like timing and fuel management are, but not when VTEC engages.
Actually, it wasn't JUST the ECU that contributed to Scott's pulling away. He also has the Mugen exhaust, header and just about every other gizmo that we all crave.
I'm not perfectly clear on all the things the ECU does, but I know that timing issues and some fuel mapping issues are handled by it, as well. Scott tells me that the ECU leans out the fuel mixture for cleaner combustion since the stock computer, Mugen found, is too rich. So in addition to the nice low end throttle response (leaner mixture) increase there is an additional fuel economy, which it would seem is an oxymoron.
I would speculate that since the mixture is more lean, that plugs foul less quickly and spark better, thereby creating a more effective explosion and longer life for the plugs, which is a long time already...
I'll make sure that Scott sees this post and he can impart his wisdom...
No, VTEC engagement is NOT controled by the ECU. Things like timing and fuel management are, but not when VTEC engages.
Actually, it wasn't JUST the ECU that contributed to Scott's pulling away. He also has the Mugen exhaust, header and just about every other gizmo that we all crave.
I'm not perfectly clear on all the things the ECU does, but I know that timing issues and some fuel mapping issues are handled by it, as well. Scott tells me that the ECU leans out the fuel mixture for cleaner combustion since the stock computer, Mugen found, is too rich. So in addition to the nice low end throttle response (leaner mixture) increase there is an additional fuel economy, which it would seem is an oxymoron.
I would speculate that since the mixture is more lean, that plugs foul less quickly and spark better, thereby creating a more effective explosion and longer life for the plugs, which is a long time already...
I'll make sure that Scott sees this post and he can impart his wisdom...
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From: WA
Leaning out the mixture is the 1st trick that most ECU/Chip aftermarket vendors use. The Dinan chips of old for other cars used to do this. The downside is that the engine does run a little hotter - the richer fuel mixture supposedly cools the engine a bit better.
The change in ignition timing does also provide a tad more torque usually but at the expense of emissions.
The change in ignition timing does also provide a tad more torque usually but at the expense of emissions.
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From: Austin
hmmm pondering that one too shing. otherwise, how would the VTEC engagement be modified by the V-AFC which plugs into the ECU? perhaps the Mugen ECU doesn't modify this at all, but I'd presume that the ECU does effect where it will kick in to the second lobe - VTEC.
Interested to hear what Scott's inputs are on this discussion.
Interested to hear what Scott's inputs are on this discussion.
