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mini me zc

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Old Sep 30, 2006 | 05:55 PM
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Default mini me zc

hey wanted to ask around.. im gonna put some zc piston into a d15b7 and a y8 head.. i heard the piston will hit the head... is that true????if it is what bottom end should i use for zc pistons and the y8 head...thanks
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Old Sep 30, 2006 | 06:04 PM
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my sohc mini me set up is a d16 y8 with the zc pistons

no clearance issues and we decked the block
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Old Sep 30, 2006 | 06:19 PM
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how bout the d15b7 block.. what would you think
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Old Sep 30, 2006 | 06:21 PM
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what u mean about decking the block
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Old Sep 30, 2006 | 07:00 PM
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Figure out the compression height of the zc pistons and the compression height of your stock pistons. There are some weird things that go on with 1.5L blocks. Compression height is defined as the distance from wrist pin centerline to the top of the timing edge of the piston or basically the top of the piston if it were a flat top, also known as the piston crown. This is NOT the distance to the top of dome.

Post up those numbers and I'll give you an idea of how close you will be.
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Old Sep 30, 2006 | 10:44 PM
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well i think im doing this right.. the height on the d15b7 block piston are 0.020 and the zc pistons are 0.040.. is this what you wanted>??>?
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Old Sep 30, 2006 | 10:45 PM
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Engine: D16a1,a6,z6,y5,y7,y8,zc
Stroke:90mm
Rod Lenght:137mm
Rod Stroke Ratio:1.52
Deck Height:212

And The

Engine:d15b1,b2,b8,b7
Stroke:84.5mm
Rod Lenth:134mm
Rod Stroke Ratio:1.59
Deck Height:207.45

Hope That's What U Looking For.. Thanks For Your Help!!!

Last edited by hatchciv92; Sep 30, 2006 at 10:50 PM.
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Old Oct 1, 2006 | 11:44 AM
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you need to use d15z1 rods our of the e-vtec
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Old Oct 1, 2006 | 09:02 PM
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why cant i just use the regular rods
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Old Oct 2, 2006 | 03:42 AM
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With the regular rods (134mm) the pistons will sit in the hole about .08" or around 2mm. This will make them alot lower compression ratio than you really want. With the d15z1 or jdm d15b vtec rods (137mm) you will be out of the hole about 1mm, this will give you alot of compression and may cause interference issues with the head, you may want to consider a thicker head gasket to bring the compression and the clearances into something manageable. Next thing you need to do is figure out the static compression ratio with the 137mm rods and a 1mm thick headgasket and see if that is what you want.
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