how much timing with a 75 shot
 

NOS dry 75 shot..alum heads, 2 range colder plugs..my buddy has it at 10 and i think thats way to low cuz we usually run 16..any thoughts

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1987 black notch(ex 4 banger)
DSS 306 w/ main support...Elderbrock 6028 heads..gt-40 intake..24# injectors...70 mm tb..77 pro-m...accel 300+..mac full legnth..tremec w/ pro5oh...full MAC exhaust,off road h-pipe,long tubes, catback...ron davis radiator..subframes, control arms...CFDF II..o yea holley FPR sucks..dont buy one..
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For a 75 shot, a reduction of 2 degrees is plenty. If you normally run trouble free at 16 BTDC, retard it to 14.

Take care
~Chris

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Retired Moderator
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My site: JimPorterRacing

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HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

I'm running 10 degrees for a 125 shot with one heat range colder plugs.

I agree completely with PKRWUD, go with a couple degrees less. Running it at 10 will be fine, but you can try more, just be careful, if it starts to spark knock, then back it off. Otherwise, have fun!

I ran 15 degrees on motor and spray with a 75 shot. Never a problem.

Spraying 150 I burned a plug with 15 degrees and hosing it after sitting in cruise traffic @ 200 degrees. I have sprayed 150 a lot with 15 degrees while the engine is running cooler though with no problems.

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1988 Mustang GT
11.8 @ 123 (7/14/01)
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1993 Explorer

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