I have heard you can increase HP on a turbo rx1 by changing the intake valve timing. Have heard you can acheive 20 to 25 hp gain. Anyone done this, know results etc. I'm told its done by elongating holes on intake cam shaft.
There is a bit of info here if you search for it but I don't think anyone ever claimed 20+hp. I have the mcx install instructions for it if you need it.
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