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That would be 98mm x 80.4mm so 3.638L. 390HP to the wheels seems a little optimistic. I am running a 3.6L setup (100mm x 76.4mm) with 12.5:1 CP pistons, GT3 crank, custom cams, AT Power ITBs, MoTec M130, 112 octane leaded race gas, custom Xtreme heads, etc., and I get 369 HP at the wheels.
Either way, you are going to have a lot of power in that light car! I think your tire bill is going to go up!
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Scott Winders
PCA GT3 #3
2021 & 2022 PCA GT3 National Champion
2021 & 2022 PCA West Coast Series GT3 Champion
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