Controlling ignition with Megasquirt. VAST or ESA?

[ChaosAD]

Ive recently been putting together a kitset ECU known as the Megasquirt to run my 4age. I was going to use the megasquirt as a fuel-only ecu till I found this. http://www.msefi.com/viewtopic.php?t=5417&highlight=4age&sid=9c877d97ddc29dd3f13ea5acbcee48d2

My question is what sort of ignition system do out JDM map sensored bluetops run? VAST or ESA?

[slighty_sykotic]

Same questioin here, what ignition does a 20v silvertop have?

--Sykotic

[slighty_sykotic]

BUMP

*innocent look*

--Sykotic

[ChaosAD]

http://www.autoshop101.com/
http://www.autoshop101.com/forms/h23.pdf

[slighty_sykotic]

I went to download the PDF, then reliesed that its exactly the same one i found the other night. Where in it does it _DEFINTANTLY_ say it? I probably missed it, but i got a strong impression that its a VAST system, but i couldnt see weather it clearly stated yes or no.

Thanks though,

--Sykotic

[pidge]

I went to download the PDF, then reliesed that its exactly the same one i found the other night. Where in it does it _DEFINTANTLY_ say it? I probably missed it, but i got a strong impression that its a VAST system, but i couldnt see weather it clearly stated yes or no.

Thanks though,

--Sykotic

Last paragraph page 6:

The VAST system is only used on the 2S-E, 22R-E, 22R-TE, 4Y-E, and 4A-GE engines.

I don't know if this applies to the 20V as well as 16V engines.

[slighty_sykotic]

Yeah, thats why i'm not completlely sure, cause it doesn't say that ESA isn't used on 4age engines aswell... See what I mean?

But yeah, it's most probably VAST, ill have a proper look tonight at my car.

--Sykotic

[ChaosAD]

It seems like my system is the ESA system. It has a 4 tooth wheel and a 24 tooth wheel in the dizzy and no wires go from the dizzy to the ignitor.

I posted a few questions on the Megasquirt site http://www.msefi.com/viewtopic.php?p=48609#48609 I have a feeling it may work.

[slighty_sykotic]

After a VERY long search, yup, my car (20v silvertop) is ESA ignition also.

Going to pick up a HEI module on monday aftanoon hopefully, if not tuesday from repco (shouldn't be too expenisive). Let me know how you go chaos. Will be interesting.

--Sykotic

[vvega]

the 20v and dli type ze ignition as well as the smallport redtops all use the same ignition system trigger wise
this a is a 24 tooth multi tooth signal wheels and a 2 point home (sync) signal
it takes the home signal and counts teeth to find spark and fueling points ,this is a true crank angle system


all the bigport 4age engines use the 4 point ignition signak and the 24 tooth multitooth
this enables the ecu to control dwell and advance but basically the dizzy controls the spark timing from each pulse of the 4 tooth the 24 tooth enables a shaper resolution for the fueling as the 24 tooth in the bigport 4ages only contols the fueling


hope this has helped

v