NA8 Camshaft Profiles

project.r.racing · Postby **project.r.racing** » Mon Jan 19, 2009 8:37 am

hi all,

Just wondering if anyone knows the lift , duration, opening and closing before and after TDC and BDC please?

And also if anyone has replaced them with aftermarket cams? If so, what did you use and what gains did you achieve?

Cheers,
Ryan

Matty · Postby **Matty** » Mon Jan 19, 2009 11:38 am

http://solomiata.com/cams.html

project.r.racing · Postby **project.r.racing** » Mon Jan 19, 2009 2:02 pm

Matty wrote:http://solomiata.com/cams.html

those are the same as my 92kW astina cam profiles.

know the oz delivered mx5 cam profiles?

Matty · Postby **Matty** » Mon Jan 19, 2009 2:18 pm

Be willing to bet they are the same.

irwin83r · Postby **irwin83r** » Wed Jan 21, 2009 6:21 pm

anyone know the cam shaft specs of the famila turbos?

project.r.racing · Postby **project.r.racing** » Wed Jan 21, 2009 7:34 pm

Mazda Familia Gt-X, GT-R, GT-Ae, Ford Laser TX3

Intake cam duration 233° @ 0.003"
Intake cam opening 2° BTDC
Intake cam closing 51° ABDC

Intake cam lobe height 44.094mm (1.7360")
Intake cam base circle 35.941mm (1.415")
Intake valve lift 8.1534mm (0.321")

Exhaust cam duration 247° @ 0.003"
Exhaust cam opening 59° BBDC
Exhaust cam closing 8° ATDC

Exhaust cam lobe height 44.600mm (1.7560")
Exhaust cam base circle 35.941mm (1.415")
Exhaust valve lift 8.6614mm (0.341")

Valve overlap 10°

Mazda Astina , Ford Laser, Kia Mentor

Intake cam duration 233° @ 0.003"
Intake cam opening 5° BTDC
Intake cam closing 48° ABDC

Intake cam lobe height 44.094mm (1.7360")
Intake cam base circle 35.941mm (1.415")
Intake valve lift 8.1534mm (0.321")

Exhaust cam duration 250° @ 0.003"
Exhaust cam opening 56° BBDC
Exhaust cam closing 14° ATDC

Exhaust cam lobe height 44.600mm (1.7560")
Exhaust cam base circle 35.941mm (1.415")
Exhaust valve lift 8.6614mm (0.341")

Valve overlap 19°

---

Still chasing the MX5 camshaft profiles, or confirmation that they are the same as Astinas/Lasers/Mentors...

Ryan

Rotary · Postby **Rotary** » Thu Jan 22, 2009 7:44 pm

Close enough to say its confirmed by this pdf

http://www.nasaproracing.com/rules/Spec-Miata-Challenge.pdf

Inf3ct0R · Postby **Inf3ct0R** » Thu Jan 22, 2009 10:02 pm

stock NA8 profile

IN 233deg 8.6mm lift
EX 250deg 8.1mm lift

93_Clubman · Postby **93_Clubman** » Fri Jan 23, 2009 2:03 pm

All I could find in some pubs I have was: NA8 cam lobe height intake: 1.736in (44.094mm); exhaust: 1.7559in (44.6mm).

Even Quithel <http://www.quithel.co.uk/> links to Randy Stocker's cam specs.


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