trying to do some comparing.. but what should max timing be with a well built motor(flatop pisitons total seal rings forged crank and rods) with 193 tbi heads....and then with my heads..my heads are.AFR180cc i was wondering really how much the tbi heads could take for a friend with pretty much the same motor i have but with tbi heads 193(ported) and really how much timing i can run with my heads....someome told me with tbi heads you can run around 28-30* and should have it all in by 3200rpm and with my afr they say 32-36* with it all in by 3600rpm note both motors have compression of tbi (9.5-1) and mine 9-8-1 also what should a good timing tabel look like.... i tune with the ostrich and the ecm is a 7747 i belive my buddys is the same...with no ostrich just the all in one... i have had help from many but want to get a big view...

 

Since no one has chimed in yet I have had decent luck using the search function. That's the best advice I can offer.

 

Data log and see where it knocks and pulls timing. Your motor will tell you.

 

i would my knock sensor is flipping out cause of my Roller rockers there the profourm and well very noisy they trigger the knock sensor all the time....so knock is disabled...i read my plugs and dont see ant black spots...but i know my heads can push more his i dont...and jsut wanted a number for a baseline for him...

 

Fuel (AF Ratio) and spark are interconnected. Most get the fuel on, then do the spark, then tweek fuel. You can chase rich fuel and more spark till melt down.

What you will be looking for is melted aluminum on your plugs.

Do a search on "detonation". Then try "Grumpy" "detonation".