[Spridgets] 1275 efi

oldsaabguy oldsaabguy at comcast.net
Tue Nov 13 08:47:54 MST 2007


Wow.. you said "plug cut"..  I thought that I was the only guy who  
used that..  and how much work would it take to make the system work  
if you didn't have a Turbo??

Lester


On Nov 13, 2007, at 9:35 AM, Glen Byrns wrote:

> I had a very productive weekend of tuning on the EFI system.  The  
> "Autotune"
> function works great.  I can catch the laptop screen out of the  
> corner of my
> eye while I'm driving and watch it working away like a demon  
> perfecting the
> fueling table.  After a 50 mile drive with little bursts of "boost"  
> and some
> steep uphill, much of the table is now populated with "corrected"  
> values and
> the car runs great.  The plugs look PERFECT after the drive and the  
> gas guage
> didn't even move off "F".  There is absolutely no overrun when you  
> shut this
> system off.  I can't wait to see what kind of mileage I'm getting  
> now, but I'm
> absolutely sure I'm getting better mileage based on the plug cut.   
> I don't
> ever recall having the motor respond so well across all gears and  
> RPM as it
> does now.  No lean spots, no rich spots, great acceleration without a
> hiccoup.
>
> This week's agenda is to erase the original code on the CPU and  
> load in the
> expanded code that will allow me to hook up the ignition to the  
> computer as
> well.  I will be able to put in any custom advance curve, start-up  
> timing
> adjustment, and manifold pressure indexed boost retard.  The  
> expanded code
> gives me a 16x16 table for fuel values and for spark timing.   
> Sweet!  I built
> all the necessary bits into the computer for spark control at the  
> start,  now
> its time to take the next step.
>
> Glen Byrns


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