Just wondering? Im gonna start playing around with it now. I had it at 30 for a base and ill probably start adding a couple degrees at a time and see how she likes it. I think i ran 33 on my H/C/I set up. So what are you guys running?
347 guys what kind of total timing are you running?
- Thread starter WhiteDevil
- Start date
Redsnk95
Founding Member
That is about what i expected ill probably work into the 34 degree range with my crappy cali 91 octane. Anyone else feel free to chime in too.
blksn955.o
Founding Member
The timing has to do with the effic. of the head chamber design. The more effic. the chamb. the less timing will be needed. Also the type of met. alows more timing as it deals with heat diff. but alot of argument can be given to the fact that most Alum. heads have a CNC'd chamber.
I dont think there is much diff. in chamb. design THAT much for most of the popular pushrod alum. heads, more CNC that cleans up the sharp edge's that also lead to pinging. Most seem to run 33-37* or so N/A that I have seen.
For giggles I was looking at a 4.6 cobra eec file on the tweecer software and they run like 10* of timing...now that is a bit diff. head than the pushrod heads. I always wonderd' what they tend to run with a tune N/A?
Isnt it something like hit your peak tq with the most timing then go down slightly? like grn92lx has?
I dont think there is much diff. in chamb. design THAT much for most of the popular pushrod alum. heads, more CNC that cleans up the sharp edge's that also lead to pinging. Most seem to run 33-37* or so N/A that I have seen.
For giggles I was looking at a 4.6 cobra eec file on the tweecer software and they run like 10* of timing...now that is a bit diff. head than the pushrod heads. I always wonderd' what they tend to run with a tune N/A?
Isnt it something like hit your peak tq with the most timing then go down slightly? like grn92lx has?
Well John
We have a bit better gas here that you guys got
but
I usually run 36 to 38 in the winter
and
32 to 34 in the summer
You'll just have to set it up a bit fat
and
play with it to see what it likes
then ........
Sneak up on the final ratio/spark values
Grady
We have a bit better gas here that you guys got
but
I usually run 36 to 38 in the winter
and
32 to 34 in the summer
You'll just have to set it up a bit fat
and
play with it to see what it likes
then ........
Sneak up on the final ratio/spark values
Grady
Redsnk95
Founding Member
blksn: Actually your lowest amount of timing will generally be around your torque peak. Most people will retard a degree or so on the big end to help create some torque to help mph.
Black95GTS
Active Member
We tuned my cousin's via TwEECer to hit 36 degrees at 3000 RPMs then it drops to 35 after that.
No dyno results but it likes to ping ever so slightly at 36 degrees with his 6000 RPM shift point. 35 is just right.
Adam
No dyno results but it likes to ping ever so slightly at 36 degrees with his 6000 RPM shift point. 35 is just right.
Adam
