390 timing
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390 timing
just curious where you guys with 390s set your timing? ive read everything from 30 to 40 degrees. im gonna mess with my timing today and try to get a lil more get up and go from my engine 
happy 4th everyone! 
happy 4th everyone!
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From: New Mexico
Turn it to where it sounds the best... sometimes its better to do it by your ear than degrees.
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From: Big Sky Country
crank it til you break it....
The factory numbers are for when you tune grandmas car on a sunday afternoon (4-8 degrees)
(10-12 degrees) on a stock 390 is what I would run.
If the motor is juiced up (18-20 degrees).
Just don't exceed 38 total and you should be golden.
The factory numbers are for when you tune grandmas car on a sunday afternoon (4-8 degrees)
(10-12 degrees) on a stock 390 is what I would run.
If the motor is juiced up (18-20 degrees).
Just don't exceed 38 total and you should be golden.
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i bumped it up to 16 degrees and it seems to really like it. its a lot more peppy taking off from stop lights. i was using 10 degrees and it was kinda doggish. my mechanical advance is only 20 degrees so i should be ok using 16 degrees right? thats 36 degrees total.
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i bumped it up to 16 degrees and it seems to really like it. its a lot more peppy taking off from stop lights. i was using 10 degrees and it was kinda doggish. my mechanical advance is only 20 degrees so i should be ok using 16 degrees right? thats 36 degrees total.
Josh
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ive only had 36 degrees timing for one day but so far im pretty happy with it. the engine sounds really strong and pulls really hard 
but i dont see all the timing until a lil after 3100 rpm. is that about right? or should i put lighter springs in so the timing comes in sooner?
but i dont see all the timing until a lil after 3100 rpm. is that about right? or should i put lighter springs in so the timing comes in sooner?
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From: Big Sky Country
Having the advance "all in" around 3,000 rpm +/- is pretty much where you wanna be...
Having the advance in too soon and it can be detonation city, if this FE were in a 3,000 lb. Mustang it'd be a different story, you'd wanna be "all in" around 2,000-2,500 rpm.
So... i wouldn't recurve the dizzy, you're OK where you're at, you can bump the initial up 2 more degrees if you feel the need to, but at 36 you have a little cushion, so if you're happy with it i'd leave it alone.
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i tried 18 degrees but it was kinda hard to start. like the starter was struggling to spin so i turned it back down to 16 degrees. i think ill just leave it there. it sounds really good to the ear and has a lot of get up and go. i havent heard any pinging but its kinda hard to hear over my exhaust but im listening pretty hard and cant hear anything so i think im ok. im only using 87 octane but i can jump to 89 if i have to. but right now this fe screams down the hiway so im happy.
i havent heard any pinging but its kinda hard to hear over my exhaust but im listening pretty hard and cant hear anything so i think im ok. im only using 87 octane but i can jump to 89 if i have to. but right now this fe screams down the hiway so im happy.
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