pulling timing out for nos

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dannyman · #1 Post by **dannyman** » Sun Mar 15, 2009 12:44 pm

ive heard so much diffrent stuff about pulling timing out for nos from 2 4 deg for ever 50hp of nos i like to run on the safe side i have hi compression sbc set up for nos run 112 fuel what would be the best i was told to pull 18deg out for the 300 i run but told many other things to what is the best to pull out for ever 50hp

TubbedTruck67 · #2 Post by **TubbedTruck67** » Mon Mar 16, 2009 10:35 pm

Pulling 18 is petty excessive for a 300 shot..

ytnova · #3 Post by **ytnova** » Tue Mar 17, 2009 8:15 am

I usually start with 2 degrees out per 50hp worth of spray and start creeping some back in, checking the plugs every pass until I know what the combo likes.

big block nova · #4 Post by **big block nova** » Tue Mar 17, 2009 10:23 am

ytnova wrote:I usually start with 2 degrees out per 50hp worth of spray and start creeping some back in, checking the plugs every pass until I know what the combo likes.

X2

aitch o · #5 Post by **aitch o** » Tue Mar 17, 2009 12:33 pm

my conventional head sbc, seems to like 3 to 4 degrees per 100 shot retard.
i have tried to be "safe" before by pulling more and ended up hurting pistons with unburnt fuel under the top ring and lifted the top land.
18 is too much for 300.
12 is plenty to start with.

pulling timing out for nos

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