how much timing?
01-22-2010, 11:59 AM
#2
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Looks like a nice build.
That is a pretty open-ended question, and is very difficult to just 'guess' at a number.
I will ask the obvious question. Can you get to a dyno? I would imagine that to properly tune that beast, you would had to dyno tune it anyway.
WOT Timing really takes some dyno time. Perhaps with that CR, you might only need 22 degrees of timing at WOT. That is just a wild guess on my part.
Hopefully you will get some more responses from people with a similar setup..but they might tell you the same thing..tune it..
Good luck..
.WeathermanShawn..
01-23-2010, 07:48 AM
#3
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Hi there:
Looks like a nice build.
That is a pretty open-ended question, and is very difficult to just 'guess' at a number.
I will ask the obvious question. Can you get to a dyno? I would imagine that to properly tune that beast, you would had to dyno tune it anyway.
WOT Timing really takes some dyno time. Perhaps with that CR, you might only need 22 degrees of timing at WOT. That is just a wild guess on my part.
Hopefully you will get some more responses from people with a similar setup..but they might tell you the same thing..tune it..
Good luck..
.WeathermanShawn..
Looks like a nice build.
That is a pretty open-ended question, and is very difficult to just 'guess' at a number.
I will ask the obvious question. Can you get to a dyno? I would imagine that to properly tune that beast, you would had to dyno tune it anyway.
WOT Timing really takes some dyno time. Perhaps with that CR, you might only need 22 degrees of timing at WOT. That is just a wild guess on my part.
Hopefully you will get some more responses from people with a similar setup..but they might tell you the same thing..tune it..
Good luck..
.WeathermanShawn..
work good so i try 26 and i got some dentenation. i have a couple friends that have 427 with 12 to1 cr and they can get 26 degs on pump gas!!
01-25-2010, 02:09 PM
#4
Every set up is different. One piece of advice though would be when adjusting your timing tables, do adjustments in 1 degree increments.
Also there is a few other tables that influence your overall timing. You need to make adjustments to them as well.
Also there is a few other tables that influence your overall timing. You need to make adjustments to them as well.
01-25-2010, 02:50 PM
#5
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The point is not "how much can I get away with".
It's "how much doesn't give any more benefit".
There's a fair gap between MBT and ping, as little
as a couple degrees, but likely more.
This is where a dyno or an accelerometer you can
log, is useful. You run a few pulls with a series of
timing maps and you pick the "best answer" point by
point (going by best acceleration vs road speed,
what RPM and CylAir was that, update the table in
that cell) and stitch it together.
Keeping in mind that more spark than helps, is only
going to be ping-potential when warmer weather or
aging comes around.
It's "how much doesn't give any more benefit".
There's a fair gap between MBT and ping, as little
as a couple degrees, but likely more.
This is where a dyno or an accelerometer you can
log, is useful. You run a few pulls with a series of
timing maps and you pick the "best answer" point by
point (going by best acceleration vs road speed,
what RPM and CylAir was that, update the table in
that cell) and stitch it together.
Keeping in mind that more spark than helps, is only
going to be ping-potential when warmer weather or
aging comes around.
01-29-2010, 05:06 AM
#6
Launching!
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I agree 100% with the above post (#5).
The better the engine is built the less total timing required.
The minimum required timing to get to MBT is where you need to be.
01-29-2010, 11:26 AM
#7
The point is not "how much can I get away with".
It's "how much doesn't give any more benefit".
There's a fair gap between MBT and ping, as little
as a couple degrees, but likely more.
This is where a dyno or an accelerometer you can
log, is useful. You run a few pulls with a series of
timing maps and you pick the "best answer" point by
point (going by best acceleration vs road speed,
what RPM and CylAir was that, update the table in
that cell) and stitch it together.
Keeping in mind that more spark than helps, is only
going to be ping-potential when warmer weather or
aging comes around.
It's "how much doesn't give any more benefit".
There's a fair gap between MBT and ping, as little
as a couple degrees, but likely more.
This is where a dyno or an accelerometer you can
log, is useful. You run a few pulls with a series of
timing maps and you pick the "best answer" point by
point (going by best acceleration vs road speed,
what RPM and CylAir was that, update the table in
that cell) and stitch it together.
Keeping in mind that more spark than helps, is only
going to be ping-potential when warmer weather or
aging comes around.
