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Ignition timing w/Mugen ECU, 4-1, test pipe...?

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Old Jun 26, 2001 | 03:59 AM
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Default Ignition timing w/Mugen ECU, 4-1, test pipe...?

Presently set at 17.5, thinking I might be able to back it down to around the "stock" 15.
FPR set to about 52 at the moment, warmed up idle seems a little high at around 1100 (will run w/AC though).

Just for reference I looked up Andrew's dyno plot which was for a similar set up.
https://honda-tech.com/zerothread?id=29940 https://honda-tech.com/zerothread?id=29936

Smelled just a little in the parking garage this morning, but not grossly rich or anything.
Here's the kicker, should I back down the timing for the cross country drive and then up it again at BW on race gas? TIA , ed
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Old Jun 26, 2001 | 04:01 AM
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Default Re: Ignition timing w/Mugen ECU, 4-1, test pipe...? (zygspeed)

Here's the kicker, should I back down the timing for the cross country drive and then up it again at BW on race gas? TIA , ed

I think that would be a smart idea Zyg. Especially as you go across country and start to obtain some of the lower octane fuel.


Boba- who has seen 90 octane as premium before.
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Old Jun 26, 2001 | 04:06 AM
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Default Re: Ignition timing w/Mugen ECU, 4-1, test pipe...? (Boba-Fett)

Yeah, thanks Boba.
I've driven through the west before... funny how they feel 89-90 is "premium" out around Colorado.
Could drop the stock computer back in, but then I'll have to re-do everything out there (which is what I'm trying to avoid).

One "odd" thing, there's much more power down low and therefore the VTEC kick is not as pronounced!?
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Old Jun 26, 2001 | 05:00 AM
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Default Re: Ignition timing w/Mugen ECU, 4-1, test pipe...? (zygspeed)

altitude makes up for octane

vtec is not as pronounced because you are seeing a power loss when vtec
comes in. also, your x-country gas mileage will suck royally due to the
open loop ecu.
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Old Jun 26, 2001 | 05:22 AM
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Default Re: Ignition timing w/Mugen ECU, 4-1, test pipe...? (sgT)

Thanks Stephen.
I owe you lunch some time.
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