Compatable CRANK for NA8

Engines, Transmissions & Final Drive questions and answers

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randyMX5 ImBack
Driver
Posts: 28
Joined: Fri Dec 05, 2014 11:30 am
Vehicle: NA8 - Turbo
Location: Adelaide SA

Compatable CRANK for NA8

Postby randyMX5 ImBack » Tue Nov 06, 2018 10:07 am

Hi im finding it hard to find a Crank for my NA8 turbo build. The crank in the original engine and every one I have brought since seems to have a crack near the 4th bearing (which I believe is pretty common).

Which of the BP-XX engines have a compatible crank that will fit in the NA without much hassle.

Also can anyone point me in the direction to whom might have one

Thank s in anticipation

Randall

93_Clubman
Speed Racer
Posts: 11852
Joined: Mon Aug 08, 2005 11:35 pm
Vehicle: Clubman
Location: Melbourne

Re: Compatable CRANK for NA8

Postby 93_Clubman » Tue Nov 06, 2018 12:09 pm

Randy, madjak's recent thoughts re crank compatibility: http://mx5cartalk.com/forum/viewtopic.p ... k*#p934621

93_Clubman
Speed Racer
Posts: 11852
Joined: Mon Aug 08, 2005 11:35 pm
Vehicle: Clubman
Location: Melbourne

Re: Compatable CRANK for NA8

Postby 93_Clubman » Tue Nov 06, 2018 1:43 pm

Solomiata touches on but doesn't really go into enough detail on cranks, although it does on a lot of other stuff: http://fixjunk.com/solomiata/solomiata/MX5Engine.html

manga_blue
Forum Guru
Posts: 4897
Joined: Mon Apr 24, 2006 7:27 pm
Vehicle: NA8
Location: Moruya, NSW

Re: Compatable CRANK for NA8

Postby manga_blue » Tue Nov 06, 2018 4:24 pm

I've got an NB8B crank in my original NA8 block. No problems, they're identical.
’95 NA8

project.r.racing
Speed Racer
Posts: 3722
Joined: Sun Jan 18, 2009 10:16 pm
Vehicle: Non MX-5
Location: Glasshouse Mountains, QLD

Re: Compatable CRANK for NA8

Postby project.r.racing » Tue Nov 06, 2018 9:18 pm

Any BP DOHC engine has the same crank. Mazda Ford Kia


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