12-15-2008, 11:47 PM
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Join Date: May 2007 Location: right behind you
Posts: 2,281
Car: '85 maro Engine: Hybrid 3.4 Transmission: TH700 R4 Axle/Gears: 3.73 posi | Tuning spark
Is there a better way to tune spark? The majority of refrences I've found involve using the knock sensor to find your limit, then tuning back from there but that just seems nonsensical. One could use a g-tech meter or dyno to find what's going to give you the min best torq, but they're really only good for finding trends. I'm sure you could find what works best after about a 1000 passes down the 1/4 mile but who has the time for that? Or here's a thought- using steady state egt & oil temps to find ideal spark (once afr's are nailed down). So what's your method?
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__________________ Increasingly I find the difference between a 'fact' and opinion is the number of people that believe it. 
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, early '769' heads with 3500 valves, LS6 springs & mild porting, worked over heddman headers, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. 210hp at 5800ft (that's 270hp at sealevel  ) |
 
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