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Old 11-01-2015, 08:33 PM   #1 (permalink)
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Default What piston and rod combo are you running

I am building a D15B2/D16Z6 and wanted to know what pistons and rods combo are you running. I am having a hard time finding a good set of rods for the D15B2, I found cxracing rods, would like either eagle or skunk2 but it seems like the make them only for the jdm D15B. Pistons I should be able to use vitara or any 75mm ones. I would like to find 9:5:1 Pistons but having hard time. I looked on Google, on this forum, Ebay and a few performance websites.
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Old 11-01-2015, 09:26 PM   #2 (permalink)
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you would be better off running a 1.6 bottom end. or a d15b crank with d16 rods.
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Old 11-02-2015, 05:51 AM   #3 (permalink)
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For what it's worth I currently have a D15B2 that has been bored .020" over. With this I have P2P0 H-beam rods and Vitara pistons. Even though they are dished, when combined with a Z6 head with flat faced Ferrea valves and a two layer MLS gasket I was able to bring the CR up to 9.1:1. I now have a Y8 head which has quench pads. Unfortunately I did not measure the volume of the combustion chamber in the Y8 head when I installed the valves so I can only provide an estimate of ~9.3:1 CR with this current setup.



Here is a picture of a Y8 head. Notice the quench pads. You'll be able to get a higher CR with this over the Z6 head because of this feature.



Here is a stock Z6 valve. Notice the dish in the face of the valve.



Here are the flat faced Ferrea valves. No dish means less volume and a higher CR.
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Old 11-02-2015, 06:22 AM   #4 (permalink)
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Hows the motor going to be treated?

Boost or N/A

Ive built a few engines and i just recently put a D16y7 together and fired her up yesterday.
PM6 Piston with stock y7 rods. .020" shaved head, 272 delta cam, puts me at about 10.2 to 1
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Old 11-02-2015, 10:23 AM   #5 (permalink)
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Hows the motor going to be treated?

Boost or N/A

Ive built a few engines and i just recently put a D16y7 together and fired her up yesterday.
PM6 Piston with stock y7 rods. .020" shaved head, 272 delta cam, puts me at about 10.2 to 1
the engine will be boosted.
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Old 11-02-2015, 10:24 AM   #6 (permalink)
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Originally Posted by keel_hauled View Post
For what it's worth I currently have a D15B2 that has been bored .020" over. With this I have P2P0 H-beam rods and Vitara pistons. Even though they are dished, when combined with a Z6 head with flat faced Ferrea valves and a two layer MLS gasket I was able to bring the CR up to 9.1:1. I now have a Y8 head which has quench pads. Unfortunately I did not measure the volume of the combustion chamber in the Y8 head when I installed the valves so I can only provide an estimate of ~9.3:1 CR with this current setup.



Here is a picture of a Y8 head. Notice the quench pads. You'll be able to get a higher CR with this over the Z6 head because of this feature.

Thanks for the info, I appreciate it



Here is a stock Z6 valve. Notice the dish in the face of the valve.



Here are the flat faced Ferrea valves. No dish means less volume and a higher CR.
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Old 11-03-2015, 05:09 AM   #7 (permalink)
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the engine will be boosted.
HP Goal?
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Old 11-03-2015, 07:57 AM   #8 (permalink)
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Old 11-09-2015, 06:40 PM   #9 (permalink)
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I too am interested in this. I know p2p0 has a d16 vitara ycp combo. Is this the one fjt use to sell or similar? Is this the famous 500hp combo. And a few ebays. Which is the best spending a few more dollars beside going forged pistons like wiseco, cp, etc
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