Hello,
I have an 1984 xr4i with an 3.1cologne. It is bored(96mm) and stroked (71.99mm). I want to fit a sprintex/power engineering supercharger kit which will blow about 8psi and 1.1L air per revolution.
The problem is that my engine has a CR ratio of 9.9:1 right now.
The supercharger normally works with a compression ratio of 9.2 on the stock engine.
I've never build an engine an i really don't know if the CR is too high for the old lump. I don't wan't any holes in my pistons.
The pistons are reinforced and probably N/A volvo b23 or b230 pistons.
Superchargers normally run higher compression than turbo's but is this 9.9 too much?
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