I finally took the leap - general tuning questions

[KasaRyan@aol.com]

I got back the first chip I had another lister burn from a bin I modified 
myself.  And it ran different in just the way I would expect, so i guess I 
have the modify thing figured out.  I also ordered everything I need from 
digikey, including a PB10, eraser, 27c512's, and some assorted adapter 
goodies.  I got tired of trying to get an old beater burner to work and 
waiting for a deal on EBAY.  (which I must say there are a lot under EPROM 
and TPI).  So I will soon be in the hunt.  I also have trouble firing a rich 
mixture at high cyl pressure, So i ordered the accell amp/coil apckage for 87 
up GM from naparts.com.  If no one has any comment about this IGN unit, I 
guess I will let you all know.  The crane unit looks like it did exactly the 
same thing for less bucks, but the website info said it was not waterproof 
and should be mounted inside.  Screw that! 

OK - in stock TBI 350 bins, there is a big dip in the fuel map aound about 
4800 prm, and it comes back up around 5600.  This is exactly where my truck 
was slow with the howell bin, which turned out to be a stock bin only with 
too much advance and the idle turned up.  Why is this dip there?  I can 
understand that the stock application shifts at 4000 and shuts off at 4800, 
so why the dip.  Even if the VE of the engine starts dropping off as you run 
out of cam and into intake, head, exhaust restrictions, why does it the fuel 
curve take off again at 5000+.?  You could never get there, so what gives?

I smoothed out the map here, getting rid of the dip and things pull much 
harder.

Thanks for listening to my electroyappin!
Ryan Hampl - a K-State Grad!    kasaryan@aol.com
139 Hoover Ct.                  Controls Engineer (tubes rule!)  
Salina, KS  67401               97 B12 / 86 V65 / 93chevy truck EFI 383
phone  (785) 825 5831           I'M ALWAYS FIRST TO THE GROCERY STORE!
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