Timing !!

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Dec 1, 2011 | 09:24 PM

schary

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Timing !!

ok.. so i am sure it has been answered.. cant find it though..
l92 with the MSD 6012...

Do I add the MAP curve to the regular curve to get "total" timing...

i have an aggressive cam .. can someone give me the actual curves to input.. the pills i think are not really as accurate.. i need a starting place..

car is a 68 camaro... 3500 pounds ish.. 373 gear...

6 spd manual t56... AED carb HO

thank you

Dec 2, 2011 | 10:40 AM

speedtigger

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3 Pedals has a really similar set up to yours. You should see what he is running for a baseline. Have you looked through the carb database sticky yet?

Dec 2, 2011 | 01:34 PM

schary

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right.. have been reading a bunch on this... just confused if i should ADD the map curve to the rpm curve .. i have seen some guys running 33 rpm timing and also 12-15 of map advance...
just looking to get a good initial startup number...

Dec 2, 2011 | 01:51 PM

speedtigger

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Quote:

Originally Posted by schary

Generally 10 degrees of Map is a good place to start. Map can do 3 things for you: Improve the idle, fuel economy and emissions.

Dec 2, 2011 | 02:43 PM

schary

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right.. do I add that number to the other number? to get total? how much total is too much.. thanks

Dec 2, 2011 | 03:08 PM

speedtigger

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Quote:

Originally Posted by schary

right.. do I add that number to the other number? to get total? how much total is too much.. thanks

You will have two charts in the software. One for the timing curve and one for the map curve. Under wide open throttle, you will not be producing any engine vacuum, so the MAP will not affect your WOT total timing figure. However, at a part throttle cruise and idle, your MAP will add the timing. It is not unusual to hit 50 degrees timing at a light cruise.

Dec 2, 2011 | 05:13 PM

schary

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ah .. seems like your running a similar setup.. can you post your timing chart or let me know where it is..
so running 34 degrees or so on the rpm table and 14 degrees on the map table is not too much? Thank you for all your help