Ignition Timing
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From: St. Johns
Ignition Timing
(88 F250 302 EFI)Currently my timing is set to 10 BTDC. The truck runs but while driving feels a little sluggish. Was thinking of going to 12 BTDC. Can anyone tell me the proper ingition timing thanks.
Post Fiend
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From: McKenzie River
Factory spec is 10 BTDC...........remove the SPOUT connector and bump it to the most you can before you start to spark knock. Try 12, you may be able to go as high as 16, just remember to reconnect the SPOUT after timing and before road test.
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From: Central, Florida
I agree, Most of the time you won't hear it ping until you are driving it. So it's kinda like, bump the timing, drive it, adjust. It all depends on the vehicle but mine is at 15 1/2 degrees. But absolutely remember to pull the spout.
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BigLar
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From: St. Johns
I have headers and cherry bombs. It didn't used to drive like it is now till I replaced the distributor, so I figure it's has to be ignition timing.
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In order to make a real difference on drivability you would have to chip the ecm. 10 btdc is just the initial timing and the ecm controls it after that. the Ecm always goes back to the stock settings. Its called adaptive strategy. Chipping a SD ECM is not a good idea. Just leave the ecm And timing stock and do some exhaust mods, Gearing mods,CAI.
BigLar
BigLar
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In order to make a real difference on drivability you would have to chip the ecm. 10 btdc is just the initial timing and the ecm controls it after that. the Ecm always goes back to the stock settings. Its called adaptive strategy. Chipping a SD ECM is not a good idea. Just leave the ecm And timing stock and do some exhaust mods, Gearing mods,CAI.
BigLar
BigLar
Might need to read fewer hotrod magazines and join the real world.....
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From: southwest michigan
Most guys end up settling somewhere around 13°-14°. Play around a bit and see what works for you.
When I moved from 10° to 13°, I didn't notice and huge power gains, but I did notice the truck downshifting less and my mileage went from 12.5mpg to 15mpg. I checked this over 7 tanks of gas before the timing bump and 6 tanks after the bump.
When I moved from 10° to 13°, I didn't notice and huge power gains, but I did notice the truck downshifting less and my mileage went from 12.5mpg to 15mpg. I checked this over 7 tanks of gas before the timing bump and 6 tanks after the bump.
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