[Gmecm] Running V8 with $A1 DIS code

[David Haggard]

I would GUESS that the correct setting would be 45. 

An even-fire V6 with DIS is firing a coil at every 60 degrees of crankshaft rotation. So my guess is based on this. 360 degrees of rotation divided by 8 cylinders is 45.

Just a guess, mind you, but it makes sense to me.

David Haggard
   '88 WS6 Formula Firebird "SR-71 Black 'Bird"



> -----Original Message-----
> From: gmecm-bounces at diy-efi.org 
> [mailto:gmecm-bounces at diy-efi.org] On Behalf Of William Lucke
> Sent: Thursday, April 14, 2005 7:42 PM
> To: gmecm at diy-efi.org
> Subject: [Gmecm] Running V8 with $A1 DIS code
> 
> Ok, the mission: run an OBD-II Northstar with 7730 using $A1 
> DIS V6 code as the starting point.
> Cylinder select has been changed to 8
> Injector constant set appropriately
> BPC/EGR table values set with correct ratio of unitary 
> displacement to injector size
> 
> What is the "spark reference angle"? It was set to 60 for the 
> V6, but no value of it makes the N* idle even passably...
> 
> I wouldn't think the V6 code would be sooo far off from what 
> the Northstar wants at idle that it just wouldn't run, even 
> when the appropriate parameters are set for an 8 cylinder...
> 
> Tried different values for "spark reference angle" and seen 
> timing change, but can't find one that's right. What does 
> spark reference angle represent and how is it computed?
> 
> 
> 
> Will
> 
> 
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