93Siro
Active Member
I have a Z4 35i. The engine is N54. 10.2 CR with 8 psi (stock level). For the last 8,000 kms i had upgraded hybrid turbos installed currently at 22 psi with 600whp and my logs are super nice with no knocks and basically zero correction factor. I kept the boost low to keep the clutches happy otherwise i have another 8 psi left in them before i reach the engine limit. Fueling is 91 plus meth.If the low cr have passed is only for co2 and fuel reduction. More cr = more efficiency = less tunability^^
10:1 it’s not 11:1 cr max near 13 after detonation.
If you have 9:1 you can’t increased turbo bost +0,2 bar ~+20% of power without any detonations.
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