Because CNC
11-04-2013, 06:29 PM
#86
Newb
Join Date: Aug 2008
Location: Aachen, Germany
Posts: 26
Total Cats: 3
Similar CHC head here in Uk gave me a extra 38bhp with +1mm valves, stock cams on a 1.6 which is still being finished off once I can sort the ignition out.
Mazda MX5 1.6-1.8-2.0L | CNCHeads
Mazda MX5 1.6-1.8-2.0L | CNCHeads
Sorry for hijacking the thread, I cannot send PM because I am missing post counts. So answer per PM is fine. Thanks
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11-04-2013, 08:53 PM
#88
We needed one of the beta heads for nationals so we pushed testing back a bit. No schedule for completion of testing though. Just whenever we get it done. I can tell you that the before/after numbers you can expect will be met with some skepticism. Folks will be surprised at how much gains are to be had with just a built head running stock cams.
We're investigating cam profiles for a VVT cam so we can offer a simple and affordable upgrade path for those with usage requirements that don't have emissions constraints.
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11-05-2013, 10:26 AM
#89
Elite Member
Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
I'd expect that at full retard, the overlap is so small that emissions wouldn't be a problem even with a very long duration intake cam. The VVT range is so large you can run way more overlap than optimal at full advance.
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11-05-2013, 11:25 AM
#90
I want to test the relatively shor duration,, high lift Toda cams for the 6D head.Toda/Maruhas only testing was on a stock engine so, not a complete picture. They might be just the ticket to retain OEM like qualities below 5000 with more torque and still make useful power above 7000. We'll see.
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11-05-2013, 11:58 AM
#91
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
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I may have missed it, but you'll be offering this service on 1.6 heads as well, yes? I'd love to see a before and after on that. I'm assuming you've been referring to the later '99 heads being an impressive upgrade, I can only assume we'd be even more floored after work on what is universally assumed to be the worst head in the miata line up, the mighty 1.6.
Let me know if you need a test dummy.
Let me know if you need a test dummy.
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11-05-2013, 01:06 PM
#92
I may have missed it, but you'll be offering this service on 1.6 heads as well, yes? I'd love to see a before and after on that. I'm assuming you've been referring to the later '99 heads being an impressive upgrade, I can only assume we'd be even more floored after work on what is universally assumed to be the worst head in the miata line up, the mighty 1.6.
Let me know if you need a test dummy.
Let me know if you need a test dummy.
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11-05-2013, 01:46 PM
#98
Senior Member
Join Date: Sep 2013
Posts: 923
Total Cats: 67
Unless you are restricted by a rule set somewhere, I don't understand why you would want to spend more that OEM rebuild money on a B6. In many other countries there are road tax benefits to staying under 1.6L. The Miata owners that stay with a B6 because registration is cheaper are not CNC head customers.
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11-05-2013, 04:12 PM
#100
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
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I may have missed it, but you'll be offering this service on 1.6 heads as well, yes? I'd love to see a before and after on that. I'm assuming you've been referring to the later '99 heads being an impressive upgrade, I can only assume we'd be even more floored after work on what is universally assumed to be the worst head in the miata line up, the mighty 1.6.
Let me know if you need a test dummy.
Let me know if you need a test dummy.
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