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Old 10-20-2013, 12:39 PM   #81
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Those damn English! They're so clever
Keep in mind that's probably where the Australians got their dyno technology
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Old 10-20-2013, 03:43 PM   #82
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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.
Do us a favor and start a new thread for the 38hp from porting on a 1.6 in the UK. In that thread we can ask you questions about your CNC head.
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Old 10-20-2013, 03:46 PM   #83
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On a naturally aspirated build? I'm betting Emilio's are worth 12hp.
No, forged FM bottom end and FM II Turbo and Adaptronic ECU. Work in progress.
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Old 10-20-2013, 05:22 PM   #84
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so basically,

completely irrelevant to this thread.

lol
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Old 10-21-2013, 07:27 PM   #85
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Very cool...Thanks Emilio/949.
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Old 11-04-2013, 07:29 PM   #86
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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
Got some more information about that? Like a before and after dyno run? Looking to do the same and still not sure if its worth the money. But real 38hp would be a deal.

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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Old 11-04-2013, 07:45 PM   #87
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Back to 949's CNC head info. Any numbers or expected availability dates yet?
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Old 11-04-2013, 09:53 PM   #88
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Back to 949's CNC head info. Any numbers or expected availability dates yet?
Head is available now. Contact me directly for prices and options.

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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Old 11-05-2013, 11:26 AM   #89
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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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Old 11-05-2013, 12:25 PM   #90
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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.
Longer cams draw less vacuum at idle and generally dont idle well.There is a dividing line between cams that idle smooth, make reasonable torque below 4500, have smooth powerbands and other cams that make big power past 7000.

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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Old 11-05-2013, 12:58 PM   #91
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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.
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Old 11-05-2013, 02:06 PM   #92
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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.
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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Old 11-05-2013, 02:15 PM   #93
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:( no 1.6 love...

I guess the target price of $2750 is too much for a 1.6!

Last edited by curly; 11-05-2013 at 02:32 PM.
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Old 11-05-2013, 02:15 PM   #94
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the mighty 1.6
YGTBSM
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Old 11-05-2013, 02:23 PM   #95
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:( no 1.6 love...

I guess the target price of $2750 is too much for a 1.6!
I like men.
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Old 11-05-2013, 02:33 PM   #96
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Interesting.
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Old 11-05-2013, 02:36 PM   #97
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Interesting.
You made the face of your avatar when you made that edit didnt you.
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Old 11-05-2013, 02:46 PM   #98
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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.
Please no NSFW pictures. Something came up....
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Old 11-05-2013, 03:06 PM   #99
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Interesting.
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Old 11-05-2013, 05:12 PM   #100
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Originally Posted by curly View Post
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.
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