Burning my first chip I selected the arap bn. as a start point. I have always been a little worried about the agressive spark table of this bin. Bmbl Bee is somewhat modified,TFS heads and 10:1 CR and a very slightly bigger cam, a DD and never raced. Though she runs well would it be to my overall advantage to go to something like the apyp bin. or even the aujm. As I compare these to each other spark management seems to be the major difference. I should add that even though I can burn a chip I am not,at this point at least, entirely comfortable making wholesale changes in a bin. Rather sneak up on something that works well. Any comments and suggestions from you old hands is appreciated.

 

Even a an experienced tuner will creep up on something that works well. By performing wholesale changes to the bin, one can not accurately gauge what the change has done- ie: you may have overshot the "sweet spot" for timing, AE, MAF and VE tables, etc. Do not make changes wholesale - work on one thing at a time, keep a notebook and scan before and after to verify you have moved in the direction or have accomplished what you want to do. Then go to the next issue.

Not knowing what you are running, I am confused in your bin references- ARAP is for an MAF Auto car but APYP is for a MAF manual car. Both of those Bins use a very aggressive timing table which I do not like. Your best bet is to initially reduce all the values in those timing tables and slowing work the curves back up, giving the engine what it wants. Detonation will be a major problem if you leave them as is and get on it, especially with a 10:1 engine. Your "slightly bigger cam" may change the engine's behavior or tolerance for detonation. I run a 10:1 iron headed engine with no problems- but I worked on the timing alot.

Anyway, I am a little south of you, but always available to try to help...Good Luck.

 

If you dont mind me asking, where are you finding these bin files at?

 

They are scattered on the web-
Craig Moates site
or
Thirdgen.org
or
EFI-tuning.org

Those will get you started. Thirdgen has an excellent tuning board.

Enjoy