counter weight question
Thread Starter
707
Joined: May 2004
Posts: 854
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From: Santa Rosa Ca
counter weight question
13bt into a 1985, iam using the 12a tranny, i switched the fly wheel now i have the use the counter weight for the 12a flywheel when installing the weight? is it put on in any position? or could be put on anyway just as long as its the same weight so question is proper aliment for counter weight? thanks and has anyone used a 12a tranny with a 13bt engine how long would it last? normal driving (ie no banging gears) because normal driving is at 6-7k =)
Lava Surfer
Joined: Mar 2002
Posts: 2,354
Likes: 0
From: Kailua, HI
you have to use the counterweight based on the rotors in the engine. that is what the weight is balancing out. S5 rotors, S5 counterweight. S4 rotors, S4 counterweight, etc...
as for the position, the weights are keyed. there's a notch in the center hole.
as for the position, the weights are keyed. there's a notch in the center hole.
Lava Surfer
Joined: Mar 2002
Posts: 2,354
Likes: 0
From: Kailua, HI
Leave the front weight that is on it alone, no need to touch that. I don't know, but would think that the original flywheel would not work for your application, either the T2 one or the 12a one. T2 fw probably wouldn't line up with the 12a tranny and starter (it would be larger diameter), and the 12a Flywheel wouldn't be balanced for the new rotors (if it's like FC's, the original Flywheel has the balancer weight built into it which would not be correct for the new engine). If you could use a T2 tranny, then using the original flywheel would be no problem. If not, you'd probably have to find an aftermarket flywheel and use the rear counterweight that would match the rotors. Call up racing beat or mazdatrix and ask them your questions, they can tell you for sure what you'd need.
As for the fuel pump, well T2 fuel pumps are 15 years old. Since you are going to have to replace the 12a pump anyway, you might as well get a new walbro or the like.
edit: oh and if you haven't already, post in the first gen forum, i'm sure there are more guys there who have done this swap than are here.
As for the fuel pump, well T2 fuel pumps are 15 years old. Since you are going to have to replace the 12a pump anyway, you might as well get a new walbro or the like.
edit: oh and if you haven't already, post in the first gen forum, i'm sure there are more guys there who have done this swap than are here.
Last edited by bingoboy; Mar 24, 2005 at 04:06 PM.
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