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i cant have knock sensor right now sow what is ignition timing for 1 bar of boost in 4efte using stock turbo and intercoolers with 93 octane and if i changed the turbo to gt20 should i retard  the timing or leave it the same and if i should change what it will be 

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I would sugest going to the dyno and work on your ignition map as there is to many variables to recomend you a specific ignition timing for your engine, the last 4efte engine that I tune on 97 ron pump gas had 25 degrees at one bar and 7.500rpm was a build engine so i dont remember the compresion or the work on the head but has a td04 turbo.

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