what is a better mass air computer
 

what is better i have a new project which happens to be speed density and i was wondering what was the better computer a9p or a9l and what is the best thing to do just buy conversion kit for 50$ or is there a better way for the mass air plug i have seen where u can just cut the pig tail but that does not come with instructions

The A9P has a better timing curve from what I've read,as it does'nt drop off timing in between shifts like the A9L.Doing the pigtail splice in on the existing harness is easy.I can make you a copy of the instructions,and get Geoffrey to get it to you if you want.

I can bring it whenever

thank u both and just whenever u can get by geoffrey thanks again

A9L's do not drop timing in between shifts. Only sn95 cars and 'supposedly' X3Z's (93 cobra) do.

That's correct,my mistake! There is a timing/fuel curve difference though,I found the comparison chart I was looking for...

A 3-way Comparison of Ford EEC-IV Computers: A9L, A9P, X3Z

WOT Spark Advance vs. RPM – FN131
A9L
RPM_____0____0____1,000___1,800___2,150___2,600___ 3,500___5,000___16,384
Degrees___8____8_____8______18.5____21.5____22.5__ ___22______25_____25
A9P
RPM______0____0____0______1,600___2,250____2,600__ _3,500___5,000___16,384
Degrees___18____18____18_____18______22______23___ ___22______26______26
X3Z
RPM_____0____0____1,000___1,800___2,150___2,600___ 3,500___5,000___16,384
Degrees___8____8_____8______18.5____21.5____22.5__ ___22______25_____25

WOT Spark Advance vs. ECT – FN134
A9L
ECT_____-256____86____120___200___236___246___254
Degrees____3_____3______0_____0____-2_____-4____-4
A9P
ECT_____-256____86____120___200___236___246___254
Degrees____3_____3______0_____0____-2_____-4____-4
X3Z
ECT_____-256____86____120___210___236___244___254
Degrees____3_____3______2_____0____-2_____-4____-4
WOT Spark Advance vs. ACT – FN135
A9L
ACT_____-256____-256____-256___-256___150___240___254
Degrees____0______0_______0______0_____0_____-6____-6
A9P
ACT_____-256____-256____-256___-256___150___240___254
Degrees____0______0_______0______0_____0_____-6____-6
X3Z
ACT_____-256____-256____-256___-256___160___240___254
Degrees____0______0_______0______0_____0_____-6____-6
WOT Spark Advance vs. BP – FN133
A9L
BP_______0____23.5____26.5___27.75___31.875
Degrees__12_____4_______4______0______0
A9P
BP_______0____23.5____26.5___27.75___31.875
Degrees__12_____4_______4______0______0
X3Z
BP_______0____23.5____26.5___27.75___31.875
Degrees__12_____6_______5______0______0


http://i156.photobucket.com/albums/t.../A9L-FN901.jpg
http://i156.photobucket.com/albums/t.../A9P-FN901.jpg
http://i156.photobucket.com/albums/t.../X3Z-FN901.jpg

Pretty good info.