.90 down the bore is alot LOL.
Remember,if you are that far down the bore & having no quench area to speak of,you can actually detonate more ,even if you have low compression.
Example (1) an engine .090 piston down the hole, no quench.Running 8 to 1 compression ratio. Running 12 psi boost pressure.
Example (2) an engine running a zero deck, nice quench area running 9 to 1 compression ratio. Running 12 psi boost pressure.
What engine would you think will have a tendancy to detonate more?
The 8 to 1 engine running less compression & no quench area,will more likely detonate more even w/less compression.
Having a good quench area is realy the better way to go.
MBHD
