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Old 02-29-2012, 05:24 PM   #1
Default Need Confirmation on Exhaust Cam Specs: 2001 BP-ZE  
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I am: Chris
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So I'm working with a former NASA engineer on developing a header for my car...really smart guy who has been working on cars for a very long time. He's been designing his own exhausts and headers for over 40 years based on formulas from who knows where. All I know is the man is a miracle worker and every car he's ever worked on has made unbelievable power and torque after what he did.

Anyway, I need the exhaust cam specs for my motor and wanted to know if these numbers I found were correct. Any information is appreciated! Thanks ahead of time guys.

Bore: 83mm
Stroke: 85mm
Exhaust Cam Specs
Duration: 250* @ .003"
Opening: 56* BBDC
Closing: 14* ATDC
Lobe Height: 44.600mm (1.7560")
Base Circle: 35.941mm (1.415")
Lift: 8.6614mm (.341")
Valve Overlap: 19*
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2001 SE BRG #2776 : 1.8L VVT, Torsen II, 6-spd

Slow for now!
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Old 03-01-2012, 09:08 AM   #2
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:sigh: i meant BP-Z3 not ZE.......

Anyway, im pretty sure i found the proper specs in the rules for Spec Miata
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Old 03-01-2012, 09:20 AM   #3
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ive seen 2 conflicting sources....

http://www.solomiata.com/cams.html

vs

http://www.nasaproracing.com/rules/spec_miata_rules.pdf
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Old 03-01-2012, 04:19 PM   #4
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Hmmmm

I suspect that Spec Miata rules are the correct set of numbers. The spec miata rules are super strict
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Old 03-01-2012, 10:47 PM   #5
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I tend to agree. Also some of the valve timing values don't really match up quite right with the duration from the solomiata site. check out this thread

"exhintake" mod on NB head
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Old 03-01-2012, 10:47 PM
 
 
 
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