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05-11-2003, 08:14 PM
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#1 |
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Registered Member
Join Date: Sep 2002
Location: NYC
Posts: 245
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Detonation?
I was driving yesterday and started backfiring through the carb. Or what sounded like a backfire. Got it home and checked it out. If you rev it slowly it's ok until about 1/2 throttle, then pops. Slap it open and it pops right away. I played with the timing and it still pops. It's a relatively new engine, about120 miles, and running 10.25 compression. I did'nt have this trouble last season. I took ti out of storage and ran it with the old "winter" gas and it ran fine. I put in some fresh Mobile 1, 93 octane and it started soon after. Haven't tried octane boost the stores were closed. Could it be detonation? How would I know for sure? Thanks
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1970 Stang Conv: en:Boss351 (balanced/blueprinted) mech cam(240*@.050/.540 lift) Scrw in studs/comp cams rllr rkr Mldn valves 2.19in 1.71ex ported polished cc'd hrdnd ex Keith Black FT pistons(10.25/1) Weiand Excellorator manifold Holley700 DP mech 2nds MSD 6 box and Dis Headers/2 1/2 inch duels tr: modified FMX re:9-inch/3.89 limited slip |
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