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Old 04-26-2005   #1 (permalink)
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Shaved cylinder head

Just wondering if anybody has tried shaving the head on a D17. I know a couple of guys with 4th gen civics who took .03" &.035" off their DOHC ZC heads and got serious power gains. I wonder if it would work on our engines.
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Old 04-26-2005   #2 (permalink)
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it would mean increaseing flow therefore higher power gains, comes down to a more efficient engine
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Old 04-26-2005   #3 (permalink)
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It bumps up the compression ratio nicely. Just wondering if anybody has tried it here.
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considering the fact our motors are interference motors i wouldnt do it and 30 thousands seams like alot to do. i bet their engines are also but probably more room.
i wouldnt go with .030 though just seems like alot
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Old 04-26-2005   #5 (permalink)
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Quote:
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considering the fact our motors are interference motors i wouldnt do it and 30 thousands seams like alot to do. i bet their engines are also but probably more room.
i wouldnt go with .030 though just seems like alot
Yeah, I hear ya man. .030 on a D17 sounds scary. It would be cool to know how much could be taken off safely, and how the car would react, running premium fuel of course.
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Quote:
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Yeah, I hear ya man. .030 on a D17 sounds scary. It would be cool to know how much could be taken off safely, and how the car would react, running premium fuel of course.
you would have to take the head off and measure the distance from tdc to the top of the block (most of the time there is one almost always) then include thickness of gasket and height from botom of head to lowest point of the valve then subtract from that the lift of the valve but youd have to push the valve in that much and take a measurement from the old lowest point of the valve to the new one and subtract that from the combined measurement of it all and there would be the most that you could safely do it. although its a pain in the *** because you technicallly could do a lil more because of valve timing but then if you get valve float at all your screwed
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Old 04-26-2005   #7 (permalink)
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Quote:
Originally Posted by ncirom2003
you would have to take the head off and measure the distance from tdc to the top of the block (most of the time there is one almost always) then include thickness of gasket and height from botom of head to lowest point of the valve then subtract from that the lift of the valve but youd have to push the valve in that much and take a measurement from the old lowest point of the valve to the new one and subtract that from the combined measurement of it all and there would be the most that you could safely do it. although its a pain in the *** because you technicallly could do a lil more because of valve timing but then if you get valve float at all your screwed
Getting the head shaved is nice and cheap, but if new valve spring and retainers are needed, plus the cost of a new gasket and head bolts = not so cheap.
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yea lol although you could probably find someplace a clearance measurement and take your chances shaving off that much
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Old 04-27-2005   #9 (permalink)
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I think it's safe to say that my warranty would be buh-bye...
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hahaha yea definately, although they probably wouldnt notice
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Old 04-27-2005   #11 (permalink)
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It's a nice sleeper mod. That one guy has a CRX with the ZC with .035 taken off and kills at the drag strip. Then he opens the hood and all you see is a DOHC non-Vtec.
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thats sick, i was going to buy a crx off a buddy for like 300 bucks but i decided not too.
did he have to run off of anything higher octane than pump gas due to the compression increase?
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Old 04-27-2005   #13 (permalink)
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Quote:
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thats sick, i was going to buy a crx off a buddy for like 300 bucks but i decided not too.
did he have to run off of anything higher octane than pump gas due to the compression increase?
He runs pump gas, but pretty much just Sunoco Ultra 94
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oh so it probably hasnt increased it too much, either way thats pretty cool and its definatley a good idea
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Old 04-27-2005
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