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Old 12-31-2014, 11:31 PM   #21
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I am 99% sure the MSM uses the larger NB2 thrust bearings. It's really interesting to me that the BP4W had issues with the small thrust bearing - those small thrust bearings were used in a lot of B6/BP motors for a long time before the issues arose.
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Old 01-01-2015, 01:35 AM   #22
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It does, just installed a 01-05 thrust washer in laz's '05 msm.
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Old 01-01-2015, 03:24 AM   #23
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Don't forget the mixing manifold difference, what a nightmare that becomes if you try to flip it... ask me how I know.
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Old 01-01-2015, 05:43 AM   #24
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Quote:
Originally Posted by Savington View Post
I am 99% sure the MSM uses the larger NB2 thrust bearings. It's really interesting to me that the BP4W had issues with the small thrust bearing - those small thrust bearings were used in a lot of B6/BP motors for a long time before the issues arose.
As I understand it, the issue with the thrust brg was that some blocks were improperly machined, not that the thrust brg was insufficient.
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Old 01-01-2015, 10:31 AM   #25
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As I understand it, the issue with the thrust brg was that some blocks were improperly machined, not that the thrust brg was insufficient.
Chicken and egg. The surface machined into the block was too big and the bearing was not of sufficient thickness. Lack of final QC, probably because accountants got involved.

The really interesting thing, is that this started back with 96 or 97 engines. No one ever talks about late NA8 thrust bearing issues, which DID exist.
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Old 01-01-2015, 12:02 PM   #26
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Don't forget the mixing manifold difference, what a nightmare that becomes if you try to flip it... ask me how I know.
Ah yes, very very true. Completely different mixing manifold that cannot be flipped without extensive modifications. The hard line for the heater core also has a hose barb for turbo water return brazed on.
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Old 01-01-2015, 04:14 PM   #27
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The 99-00 coils are a common failure. NB2 coils dont seem to have this problem.
NB2 coils are less likely to fail, but they produce a weaker spark than the NB1 coils do when the NB1 coils are actually working.

Neither of them is really acceptable.

--Ian
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Old 01-01-2015, 04:38 PM   #28
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Contrary to what most people believe, all Miata coils are capable of 400whp if properly gapped plugs and leads are used. I know because I've done it on each car more than once.

Not saying that an upgrade is a bad thing, all I'm saying is that if you don't have an infinite amount of cash to spend, you may get away with the stock coils for a few thousand miles.
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Old 01-01-2015, 09:49 PM   #29
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Yeah but 400whp with a what? .005 gap?
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Old 01-02-2015, 02:31 PM   #30
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Just to chime in. I'm running stock MSM/NB2 coils @ 22psi with a .035 gap on BK7RE NGKs with out any blow out.
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