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Join Date: Aug 1999
Location: port st lucie/stuart florida
Posts: 366
oversized valves

i have a 3.0l 930. how much bigger can i go on the valves before i need to cut the valve reliefs in the pistons bigger(stock 3.0 turbo pistons)??? I know the cam i'm using will make a difference but is there a size i can go to and not have problems?? Thanks in advance


Last edited by sewell94; 08-07-2006 at 08:43 AM..
Old 08-06-2006, 07:05 PM
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Join Date: Jun 2001
Location: Sweden
Posts: 5,910
That engine has 6.5:1 C/R so with I guess you won't have problems with most "mild" cam designs (930, SC).

Otherwise, just bolt it together and turn it by hand while out of the car. You'll have to check deck height anyway so there is nothing to loose. Should it touch the piston (unlikely) you could just remove the pistons and notch them.

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Old 08-07-2006, 12:37 AM
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