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Post by dcd » Sun Jun 08, 2014 9:41 am

hi Ive just completed my engine build 2276cc i have 1410 cyl head from cb performance 42x37.5 valves cnc ported and camshaft is web 86a CR set @ 8.5 .dist is MSD 6al digital ive locked it to set the timing curve with mega squirt 2 but my question is where should i stop advancing i know that 009 dist. set at maximum to 32 degrees . be appreciate any advice ...

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Re: advancing

Post by Piledriver » Sun Jun 08, 2014 3:36 pm

Make sure you are running the MS2-extra current firmware, still being developed and 5x the features of the B&G code. AFAIK no one here runs the B&G code for years, so we could not help with specific advice if you use it.

It also allows for jumperless firmware flashing once installed.

For speed density:
at 100 KPA line, start advancing ~1500 RPM from 10-12 btdc baseline to 32@3K, then no more or perhaps to 34@7K (need to play with this, some engines like less timing at very high RPM)

bottom line of table, copy/past top line in and add 15-20 degrees. Scale top to bottom in 3 sections

Something like this:

Idle: Use the idle timing and idle VE features, as well as cold idle timing adder.
Don't use the main table to stabilize the idle area, that's not what it's for.

Have never set up alpha-n (TPS vs RPM)
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