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I mean my old car was stock, no physical modification to the engine. The turbo was OEM never relpaced. The Compression ratio: 10:03:01.
The car comes stock with no power "200hp" but also with no turbo lag.
I did modifications in steps first add the APR programing (52hp), second the exhaust (20hp) plus K&N intake (18hp), and then high flow fuel pump (25hp)
At the end I was turning at the flywheel 315hp and 381 ft/pounds.
I agree that the 4 cylinders may have a bigger OEM turbo then the 335i.
But is it enough to make that big of a difference ? all arround in parts alone I spent on my car $3,000 and had some good gains.
Isnt a bit stiff to spend $2,000 just on ECU re flashing ? for only 52hp ?
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