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Old 02-01-2008, 11:57 AM   #1
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Default MSM Cams

Does anyone know the specs of the MSM cams. I'm trying to find out if they are any different than the 99-00 Miata Cams..

Looking for:
Duration
Centerline
Separation
Lift

on both Cams

Here is the info i've found on the 99-00 so far.

http://members.aol.com/solomiata/cams.html


Thanks,
Mike
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Old 02-01-2008, 11:58 AM   #2
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They are different. But I have no idea what the specs are.
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Old 02-01-2008, 12:09 PM   #3
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yeah they have different part numbers.. I keep hearing the 99-00 engine is the same as the MSM engine but the more detail I look at it the less I find this to be true.


If you ever get your hands on a set of the MSM cams please try and take a little time to spec them out. Would be nice to hear about them.
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Old 02-01-2008, 12:20 PM   #4
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I have a pair from a bad MSM head...
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Old 02-01-2008, 12:46 PM   #5
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for sale?
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Old 02-01-2008, 01:00 PM   #6
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ben, throw it into that head you will be sending me for some $$
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Old 02-01-2008, 01:03 PM   #7
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No & No
Anyway, remember the MSM has a redline of 6500. So I'm not too sure what would happen with same cams in a 7500 rpm motor.
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Old 02-01-2008, 01:12 PM   #8
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Quote:
Originally Posted by Ben View Post
No & No
Anyway, remember the MSM has a redline of 6500. So I'm not too sure what would happen with same cams in a 7500 rpm motor.
Really the bigger thing to look for is overlap.. on a turbo car you don't want valve overlap.
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Old 02-03-2008, 03:48 PM   #9
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Hey Ben

one of the mods over at mazda-speed.com was saying the cams are the same part number as the 99-00. Are you showing the same thing? his info was from a UK Mazda Parts CDs. I'm guessing you have access to USDM Mazda part numbers? Can you see if the part numbers match?
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Old 02-03-2008, 04:17 PM   #10
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The MSM cams had different markers cast in them.

As far as part #s go, I'll try to remember to look it up Monday.
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Old 02-03-2008, 06:11 PM   #11
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Mazda isn't showing different cams for '04-'05 turbo/non turbo, but here are all of the NB cam part numbers if it helps any.

2004/2005 Intake - BP5A-12-420
2004/2005 Exhaust - BP6F-12-121
2003 Intake - BP6D-12-420C
2002 Intake - BP6D-12-420A, BP6D-12-420B, BP6D-12-420C
2001 Intake - BP6D-12-420, BP6D-12-420A
1999/2000/2001/2002/2003 Exhaust - BP4W-12-440
1999/2000 Intake - BP4W-12-420
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Old 02-03-2008, 06:16 PM   #12
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The intake Cam has to be different between the MSM and the Non-Turbo 04-05 Miata

MSM doesn't have VVT
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Old 02-03-2008, 06:18 PM   #13
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Quote:
Originally Posted by Ben View Post
The MSM cams had different markers cast in them.

As far as part #s go, I'll try to remember to look it up Monday.
Sorry for my ignorance but what do you mean by "markers"?

Thanks for the help.
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Old 02-03-2008, 08:57 PM   #14
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The center of the cams have identification markers. IIRC, 99-00 cams have BP embossed on them prominently with 4W embossed but harder to see. And IIRC, the 04-05 MSM cams that I looked at last week had B5 embossed on them.
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Old 02-04-2008, 09:09 AM   #15
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Per MazdaEPC, the MSM uses a unique intake cam, with a BP5 part number. All 99-05 miatas use a common exhaust cam with a BP4 part number. 01+ intake cam is BP6.

So I wasn't crazy
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Old 02-04-2008, 09:57 AM   #16
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Quote:
Originally Posted by Ben View Post
Per MazdaEPC, the MSM uses a unique intake cam, with a BP5 part number. All 99-05 miatas use a common exhaust cam with a BP4 part number. 01+ intake cam is BP6.

So I wasn't crazy
I don't know about you not being crazy but thanks for looking it up.

i'm getting conflicting info on this from what I consider two reliable sources. Argh !!

[quote author=SilverMiataRacer link=topic=12569.msg126305#msg126305 date=1202069203]
The exhaust cam is the same number 99-05. The intake 99-00 and 04-05 turbo are the same. The 01-05 non-turbo is different byt the letter on the end which usually means a minor difference. In this case a difference cam gear is used probably for the VVT system.
[/quote]

http://www.mazda-speed.com/forum2/in...c,12569.0.html
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Old 02-04-2008, 10:37 AM   #17
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How can I put it gently... He's wrong

I just looked at a MSM cam, clearly has "5A" embossed on it (My memory was wrong when I claimed it was B5--it's 5A; I just looked at it). I posted the 99-00 intake cam markers earlier in the thread.

The turbo cam is not listed as a revision to an existing part; it's listed as a completely new part. Why would Mazda make the same camshaft with 2 very different part numbers? The 99-00 cam is still available for purchase from Mazda.

I'll spell it out
99-00 4W intake: BP4W-12-420
04-05 turbo intake: BP5A-12-420
01-05 std intake: BP6D-12-420
(revisions not listed)

As far as cam specs go, I have no idea. But it is defiantly going to be different.
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Old 02-04-2008, 10:40 AM   #18
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Quote:
Originally Posted by Ben View Post
How can I put it gently... He's wrong

I just looked at a MSM cam, clearly has "5A" embossed on it (My memory was wrong when I claimed it was B5--it's 5A; I just looked at it). I posted the 99-00 intake cam markers earlier in the thread.

The turbo cam is not listed as a revision to an existing part; it's listed as a completely new part. Why would Mazda make the same camshaft with 2 very different part numbers? The 99-00 cam is still available for purchase from Mazda.

I'll spell it out
99-00 4W intake: BP4W-12-420
04-05 turbo intake: BP5A-12-420
01-05 std intake: BP6D-12-420
(revisions not listed)

As far as cam specs go, I have no idea. But it is defiantly going to be different.
Cool thanks for all the work it is appreciated. now if you would just sell me the intake cam I would spec it out and end this.
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Old 02-04-2008, 10:55 AM   #19
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My cam
Though I am not opposed to letting Randy Stocker measure it up and put info on his site to make it more complete.
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Old 02-04-2008, 11:04 AM   #20
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Quote:
Originally Posted by Ben View Post
My cam
Though I am not opposed to letting Randy Stocker measure it up and put info on his site to make it more complete.
That sounds like a good idea.

DO EEEEEEETT !!
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