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Chrome Box EIM - Does it Retard Advance?
#1225994
05/02/12 02:33 PM
05/02/12 02:33 PM
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MassHole Central
rtman
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Like the Orange box does at 4000RPM? And, does anyone have a schematic of both the Orange and Chrome boxes? It has become an unfunded engineering project at my work  And any reference to MSD will be ignored...except someone who has an MSD that fits the stock loom 
Last edited by rtman; 05/02/12 03:22 PM.
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: rtman]
#1225995
05/02/12 04:20 PM
05/02/12 04:20 PM
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JohnRR
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: rtman]
#1225997
05/02/12 05:40 PM
05/02/12 05:40 PM
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JohnRR
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The  was for your what you edited out ... I'll pm the rest of my response not to derail your question.
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: maximum entropy]
#1226000
05/02/12 10:16 PM
05/02/12 10:16 PM
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JohnRR
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Quote:
my orange and chrome boxes must be aberrations. 
Care to expand on that ?
His orange box was on a chassis dyno last friday , connected to it and it showed the timing retard above 4000 rpm.
Keith are you saying the chrome box also pulls out timing above 4000 rpm ?
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: lewtot184]
#1226003
05/02/12 10:37 PM
05/02/12 10:37 PM
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JohnRR
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Quote:
from my experience with the ecu boxes most will reduce dwell some as the rpm increases. not sure if that will retard timing. the timing retard that i have experienced as rpm increased was mechanical related, not electrical.
How would centrifugal force acting on the weights retard the timing ?
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: JohnRR]
#1226004
05/02/12 10:40 PM
05/02/12 10:40 PM
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lewtot184
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Quote:
Quote:
from my experience with the ecu boxes most will reduce dwell some as the rpm increases. not sure if that will retard timing. the timing retard that i have experienced as rpm increased was mechanical related, not electrical.
How would centrifugal force acting on the weights retard the timing ?
my problem wasn't ignition related. timing chain with a little cam walk.
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: lewtot184]
#1226005
05/02/12 10:41 PM
05/02/12 10:41 PM
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JohnRR
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Quote:
Quote:
Quote:
from my experience with the ecu boxes most will reduce dwell some as the rpm increases. not sure if that will retard timing. the timing retard that i have experienced as rpm increased was mechanical related, not electrical.
How would centrifugal force acting on the weights retard the timing ?
my problem wasn't ignition related. timing chain with a little cam walk.
Everything on the engine in question is brand spanking new .
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: JohnRR]
#1226007
05/02/12 10:51 PM
05/02/12 10:51 PM
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lewtot184
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Quote:
Quote:
Quote:
Quote:
from my experience with the ecu boxes most will reduce dwell some as the rpm increases. not sure if that will retard timing. the timing retard that i have experienced as rpm increased was mechanical related, not electrical.
How would centrifugal force acting on the weights retard the timing ?
my problem wasn't ignition related. timing chain with a little cam walk.
Everything on the engine in question is brand spanking new .
my timing chain was brand spankin' new too. just relating an experience, believe what you want.
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Re: Chrome Box EIM - Does it Retard Advance?
[Re: maximum entropy]
#1226011
05/04/12 03:25 PM
05/04/12 03:25 PM
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JohnRR
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Quote:
Quote:
Dwell ddirectly affects timing,.
not if the dwell starts earlier. it can be manipulated electronically. i've checked several orange boxes, and one chrome box, to 6000 rpm- no sign of retardation (pardon the choice of words). they are all old boxes, though. i think my newest one is over ten years old. i think ballast resistor selection is important, too. iirc, there are two resistance values available? i have always used the higher resistance, and have had no ignition issues ever (aside from a ballast resistor failing at an extremely inopportune time).
In the other thread about this subject it is claimed that there was a change made to them in 2000. So if your boxes are older than that it doesn't help with this question/problem.
But thanks anyway.
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