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Old 12-07-2007, 11:07 AM   #11
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Do you know if the VX head fits directly on the CX block without any modifications?
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Old 12-07-2007, 11:34 AM   #12
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Do you know if the VX head fits directly on the CX block without any modifications?
it should!?
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Old 12-07-2007, 12:43 PM   #13
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The VX head has a shallow combustion chamber with dished pistons. The CX has more volumne in the combustion chamber and flatter pistons, so I think if you just swapped the head you'd end up with a very high compression ratio. The swap would also require the IM and ECU to really function like a VX.
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Old 12-07-2007, 02:03 PM   #14
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The VX head has a shallow combustion chamber with dished pistons. The CX has more volumne in the combustion chamber and flatter pistons, so I think if you just swapped the head you'd end up with a very high compression ratio. The swap would also require the IM and ECU to really function like a VX.
Honda ppl call it something like a "mini me"...it's either:

1) VX bloack w/ another head
or
2) VX head w/ another block...i forget.

*it'll bolt up fine, but like stated above, you should check out the resultant CR. (there's a forum post somewhere that shows lots of the CR from mounting different heads w/ different blocks...it's on a Honda forum)
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Old 12-07-2007, 02:54 PM   #15
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My understanding of the mini me was to put a 16 valve Vtec head on a non Vtec block to increase HP. Though I guess the term would work for VX heads.

To make the VX head compatible with the CX block, you could put VX pistons in the CX block.
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Old 12-07-2007, 11:26 PM   #16
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Originally Posted by mrmad View Post
My understanding of the mini me was to put a 16 valve Vtec head on a non Vtec block to increase HP. Though I guess the term would work for VX heads.

To make the VX head compatible with the CX block, you could put VX pistons in the CX block.
You will also need the longer VX rods. You might as well just find a d15z1.

I have 2 d15b8s and a d15z1. One d15b8 is assembled and has the distributor and ECU. The other is disassembled - as is the d15z1. I am thinking about rebuilding the d15z1 but I don't seem to have the time with classes and all. If somebody really needs parts something can probably be arranged...
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Old 12-08-2007, 12:18 AM   #17
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1st post updated!

*if anyone needs old bearings/rings,....I have plenty. They all look to be in good shape. I'll send them to you for the cost of shipping. (if no one needs them, I"ll probably toss them...I've got too much junk in my as is)
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Old 12-08-2007, 06:02 AM   #18
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It's been really interesting to see a VX engine being torn down. Thanks for the view of its guts, 350.

Did you machine some metal off of the cylinder head to increase the compression ratio slightly like you wanted?
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Old 12-08-2007, 08:55 AM   #19
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Looks like you're making some good progress.

Did you install new piston rings? Or are you sticking with the originals?
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Old 12-08-2007, 11:04 AM   #20
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Dont forget the adjustable cam sprocket youll need (or a custom offset cam key) to put the cam timing back where it's supposed to be.... Unless there is more FE to be gained by running retarded cam timing. I can't remember where I saw the chart for shaving the head vs how much it retards the timing....probably not applicable in this case because I'm sure it was for a DOHC head (b16 etc) not a VX head.
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