Dished vs Reverse Dome pistons
02-08-2007, 10:57 PM
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Staging Lane
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Dished vs Reverse Dome pistons I am trying to find out what would be best for a new turbo engine I am getting ready to build for TT GTO. I have heard various opinions from different sources some say for a N/A car a reverse dome with proper quench is very important. But for a boosted application it is not as critical, my theory is while off boost the reverse dome will be more efficient and the engine may be more responsive due to more efficient combustion.
I have always liked dished pistons for boost but am just curious what people who have experience with this think. So I ask this when building a boosted engine and you could get the target compression ratio in either a reverse dome or a dished piston which would be better and why? If it makes a difference the vehicle is a daily driver on a mix of 100 and 91, car is set up for topend highway runs. Boost will be set at 12psi on springs and 18psi on kill, currently at 12 to 14psi stock bottom end with 72cc Patriots and a Gt2-3 cam.
Les
I have always liked dished pistons for boost but am just curious what people who have experience with this think. So I ask this when building a boosted engine and you could get the target compression ratio in either a reverse dome or a dished piston which would be better and why? If it makes a difference the vehicle is a daily driver on a mix of 100 and 91, car is set up for topend highway runs. Boost will be set at 12psi on springs and 18psi on kill, currently at 12 to 14psi stock bottom end with 72cc Patriots and a Gt2-3 cam.
Les
