He told me something rather surprising!
(Regarding my redtop 3SGE that they're working on)
They will be machining down the crowns on the pistons, and doing some very minor head porting to lower the CR to about 10:1 or so. (From 11:1 factory CR)
He said you cant really run a CR much higher than when running the engine on 98.
Which I suppose is beleivable... considering I am rebuilding this engine from when it detonated to death on NZ gas
However I was rather surprised to hear this, to say the least!
It seems a bit... backwards to lower the compression on an NA motor that you're building.
If it was anyone else, I would ask them what they've been smoking......
But its Lynn Rogers!
Im not going to pretend to know better, or know even anywhere near what he knows about engines.
However I still found it rather surprising that he said that, considering that a lot of modern Japanese NA engines run CR's of about 11:1.
Perhaps this is why a lot of high CR Japanese engines are often under acheivers when compared to factory figures?
Perhaps they are be losing power, from having to retard the ignition timing to prevent detonation when running this CR with 98 octane gas.
Perhaps this is also why a lot of people comment that Altezzas seem a bit gutless.
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