Rebuilt D16Z6 okay to run without retuning?
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Rebuilt D16Z6 okay to run without retuning?
I know there's a whole lot of specifics that I don't have that would make answering more accurate, but here's where I'm at.
D16Z6 N/A motor was previously dyno'd with 75.5mm bore and about 10.2:1 compression ratio due to head being shaved (w/ stock head gasket). It blew some ring lands due to an overheating event, not due to the previous tuning (coolant bleed screw came out).
I've had it re-bored and re-built with forged 76mm pistons (volume increase), but also added a .060" Cometic head gasket to bring the compression ratio down to 9.7:1.
I want to take it back to get it re-dyno'd before a race in 2 weeks, but in the event that my tuner can't do it in time, will the computer find the area of the fuel maps it wants to work in an be safe to race anyways, or am I asking for trouble?
I know more information would be useful, but I just don't know exactly what I could give. I don't have the previous tuning maps. I know tuning is to get the most out of a motor, and if it's just down on power but safe to run, I'm okay with that. I would think lowering the compression ratio would theoretically be a better case to run it anyways than had I raised the compression even more. I'm just looking for a general consensus ballpark opinion based on the facts I've given. TIA
D16Z6 N/A motor was previously dyno'd with 75.5mm bore and about 10.2:1 compression ratio due to head being shaved (w/ stock head gasket). It blew some ring lands due to an overheating event, not due to the previous tuning (coolant bleed screw came out).
I've had it re-bored and re-built with forged 76mm pistons (volume increase), but also added a .060" Cometic head gasket to bring the compression ratio down to 9.7:1.
I want to take it back to get it re-dyno'd before a race in 2 weeks, but in the event that my tuner can't do it in time, will the computer find the area of the fuel maps it wants to work in an be safe to race anyways, or am I asking for trouble?
I know more information would be useful, but I just don't know exactly what I could give. I don't have the previous tuning maps. I know tuning is to get the most out of a motor, and if it's just down on power but safe to run, I'm okay with that. I would think lowering the compression ratio would theoretically be a better case to run it anyways than had I raised the compression even more. I'm just looking for a general consensus ballpark opinion based on the facts I've given. TIA
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iceman95
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03-02-2006 09:24 PM