shaved head
01-23-2006, 06:53 PM
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shaved head
i'm not all too familiar with how this would affect my motor so i need some help. i'm about to buy this head. it's a b16a head which has been shaved about 6 or 7 thousandths. it's fresh out of the machine shop. i know that'll increase comp if i use the same size head gasket, but how much will it raise? or what if i used a thicker head gasket to keep it at stock "gap". i figured if i use stock size gasket on a shaved head, it'll also affect my cam timing. i don't know how much though. or what i need to correct it or will it not even be that much noticeable. the other thing is that it's going on a b18c block which is sleeved with a 84.5 mm bore. the head does not have a match bore on the combustion chamber. i know this will also increase comp but i don't know how much. more importantly, will this negatively affect my motor? this motor is boosted and i'm planning on boosting it more with larger, more efficient turbo. aiming at around 500+whp. the guy who i'm getting the head from tells me that he's had no problems and that i'll be ok to just bolt it right up. (i'm using arp studs too) anybody???
01-24-2006, 06:23 AM
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Re: shaved head (TypeSLO)
My block was decked 25thousandths, it's fine. They do make adjustable cam gears. My block was decked more than I wanted that's for sure, but it certainly works fine.
Creating MORE dome cc will decreace static comp ratio (make a hole in the head bigger) and can possibly counteract the small shave. 6 thousands is not very much in terms of compression or cam timing. 1*/10thousandths is what I've heard, so grab some good gears and call it a day. Or listen to the other more experienced people! (You obviously don't want to!)
The head will be fine IMO, which is not necesarrily even a decent one.
Creating MORE dome cc will decreace static comp ratio (make a hole in the head bigger) and can possibly counteract the small shave. 6 thousands is not very much in terms of compression or cam timing. 1*/10thousandths is what I've heard, so grab some good gears and call it a day. Or listen to the other more experienced people! (You obviously don't want to!)
The head will be fine IMO, which is not necesarrily even a decent one.
01-24-2006, 08:32 AM
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Re: shaved head (Si Shane)
i'm just trying to get some answers from other more experienced tuners. i'd figure honda-tech would be more promising than some others. i know how this head affects my motor, i just don't know exactly how much. whether i should worry about it or not. or do i need to do more machining on it to make it work properly. i'm a noob at motor internals. haven't had so much experience with it. that's why i'm here asking questions.
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