is the stock compression ratio ok for a turbo on an 88' 190E 2.3 8 valve ? if its 9.1 or higher then i can always use shorter threaded plugs to make the compression more turbo friendly right? since ill be keeping it under 5psi boost maby less i am not sure if the compression would be ok or not ? i am planing on using the innercooler from the volvo also .

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