Originally posted by Ormand
Sorry, I'm not sure. I remember this discussed, somewhere, maybe on the GnTTY list. If you put the TTA heads on a Regal engine (one with pistons from a Turbo Regal), the compression goes up, due to the smaller chambers, but I don't have the sizes, or the numbers for the compression ratio. That would mean that Regal heads with TTA pistons would lower the compression, but don't know how much. keep trying, Im sure some of these guys have the actual numbers.