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 Post subject: Re: 1980 Mazda 626
PostPosted: Sun Sep 22, 2013 6:25 am 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
Got the engine, trans, radiator, etc pulled from the 7 finally. Other projects and my new jeep have been taking a lot of time away from the mazda sadly!

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1982 CB900 Supersport build http://www.dotheton.com/forum/index.php?topic=49045.0

1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Sun Sep 22, 2013 7:19 am 

Joined: Sat Dec 13, 2008 7:45 am
Posts: 38
Location: Massachusetts
Don't give up on this one you don't see too many of these cars anymore.


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 Post subject: Re: 1980 Mazda 626
PostPosted: Fri Dec 20, 2013 9:41 pm 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
Not giving up on her, this quarter my schedule has completely prevented me from getting any work done on her. I NEED to have teh engine swap and suspension done and completely sorted by April though, driving her up to Tennessee for a show!

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Mon Jul 07, 2014 4:53 pm 

Joined: Sun Sep 22, 2013 4:12 am
Posts: 11
Hey any progress with your swap. This is one of my favorite cars on the forum


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 Post subject: Re: 1980 Mazda 626
PostPosted: Mon Aug 18, 2014 3:46 pm 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
No progress. The previous owner hit me up, said he wanted the car back really badly, but that he couldn't get it until this month. So we made a deal and I sat on the car waiting. He backed out, so now I have to decide if I want to work on her again, or just sell her.

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Tue Aug 19, 2014 3:51 am 
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Joined: Sat Oct 31, 2009 11:53 pm
Posts: 413
Location: Adelaide
Do the conversion!! 8) I love this 626....it just needs a rotor heart!


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 Post subject: Re: 1980 Mazda 626
PostPosted: Fri Aug 29, 2014 5:23 am 
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Joined: Sun Dec 27, 2009 8:03 pm
Posts: 337
Location: Tucsan AZ / Davis-Monthan AFB / St.Croix Virgin Islands
jdmrx2 wrote:
Do the conversion!! 8) I love this 626....it just needs a rotor heart!


Agreed!!!

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 Post subject: Re: 1980 Mazda 626
PostPosted: Mon Sep 01, 2014 6:16 pm 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
Finally got around to bringing the rotary home from my friends house. Hopefully this weekend I can pull the 626 trans to see how closely things line up between the two transmissions. I'm expecting that I'll need to halve both transmissions, put the front case from the 12A trans on the guts and back half of the 626 trans, and shorten the input shaft a bit. Though I haven't found anyone that used a 12A complete swap from a 79 US spec RX7, so I still hold a glimmer of hope that the shifter placement may be the same if not at least close to where the 626 shifter is. We'll just have to wait and see.

Image

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Fri Sep 05, 2014 6:10 pm 
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Joined: Sat May 02, 2009 11:37 am
Posts: 31
Location: Seattle
Keep going man!
Been semi hunting for this model myself.
Hope time permits you to get it running.
:tu: :tu: :tu:


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 Post subject: Re: 1980 Mazda 626
PostPosted: Mon Sep 08, 2014 4:55 pm 
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Joined: Mon Mar 15, 2010 4:37 am
Posts: 180
Location: Ballarat
Unless you mount the motor right against the firewall(bulkhead) and then cut the transmission tunnel for clearance to move everything further back again, you will not get much assistance from an RX7 to help with the installation. Check my build or Danny's(L10B). There are NO interchangeable mounting brackets. You WILL need a custom tailshaft, engine and gearbox crossmember to start. Then custom radiator and mounts, extractors(headers) - you might get away with fitting standard extractors because you have no steering box and Pitman arm assembly to worry about.
CRITICAL: The position of the engine is controlled by clearance from the Pitman arm and idler arm assembly when doing lock to lock, otherwise inner tie rod ends will hit the rear of the engine.


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 Post subject: Re: 1980 Mazda 626
PostPosted: Sun Sep 14, 2014 9:10 am 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
Thanks for the info Philip. I'm about to head out to the garage and see about swapping the rear third of the transmission cases, putting the 626 tail portion and shifter onto the rx7 trans. Both transmissions have the same overall length, so this would allow use of the OEM transmission crossmember and keep the shifter in the same location. My thoughts are that this would also allow the OEM driveshart to be used, necessitating only the removal of the factory engine mounts and the subsequent fabrication of new mounts for the 12A. The front mounted 12A would require mounts about 8" further forward in the engine bay,but there is a ton of room up there.

I'm not overly concerned with the header, the 12A already has an aftermarket unit, and as you pointed out, I don't have the steering box in the way since the car is RHD. If I do need to make a new header, at least it will only require two tubes!

I really want the carbureted 12A too look like it came in the 626 from the factory when I'm done. I'll let you guys know how things go with the transmissions later!

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Sun Sep 14, 2014 4:28 pm 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
A few shots from today

Image

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626 on the left, rx7 on the right. Seems like a simple enough swap.

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626 speedometer gear, retained by a single snap ring.

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Tail housings off of both transmissions.

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626 tail housing in its new home.

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She rows through the gears great. Now I can use my factory transmission crossmember, factory driveshaft, have a properly reading speedometer, and have no issues with shifter placement!.

http://youtu.be/f9jloiqCeSU

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Sun Sep 14, 2014 11:53 pm 

Joined: Tue Sep 27, 2011 4:15 am
Posts: 335
Location: Adelaide
That's a handy mod to know, I could see that combination of shifter location being handy for a few different rotary conversions. :tu: keep the updates coming.


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 Post subject: Re: 1980 Mazda 626
PostPosted: Mon Sep 22, 2014 1:38 pm 

Joined: Sun Aug 12, 2012 8:10 am
Posts: 23
Got a little bit done yesterday. Cut the old engine mounts off of the crossmember.

Image


Cleaned up and painted the transmission crossmember.

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Started doing this.

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Then got it sitting in the bay

Image.


So It looks like I'm going to have to make a new engine crossmember that sits a few inches further forward in the bay than where the factory one is. I'll build it from 2x2 box tubing, not sure if I'm going to weld it in, or make it a bolt on setup. Then I'll cut away the center section of the old crossmember to make room for the oil pan. The transmission mount and swapped rear on the transmission look like they're going to work perfectly, but I will have to clearance the transmission tunnel in order to make room for the clutch fork to actuate at the slave cylinder.I may also have to get a remote oil filter kit, but I won't know for sure until the engine is in place. The engine is sitting back really far in the bay, so less weight than the piston engine, lower, and closer to the center, should provide better balance to the car as a whole.

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1980 mazda 626 build viewtopic.php?f=5&t=21748


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 Post subject: Re: 1980 Mazda 626
PostPosted: Wed Sep 24, 2014 3:52 am 

Joined: Tue Sep 27, 2011 4:15 am
Posts: 335
Location: Adelaide
Before you go ripping in with the grinder and cutting things up post some pics of the sump etc there are a few members here who have done this kinda swap and may be able to save you some hassles. Looks like it's heading in the right direction now the rotor is in there.


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 Post subject: Re: 1980 Mazda 626
PostPosted: Wed Sep 24, 2014 11:30 pm 
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Joined: Mon Mar 15, 2010 4:37 am
Posts: 180
Location: Ballarat
Seeing as you are working in reverse - gearstick position instead of motor position,
Have you done a steering lock to lock check? I will guarantee your drag link and inner tie tod ends will hit the base of the rear engine iron with where you have positioned it.

Edit 10.10.14: Here's some pics if you don't understand what i am talking about.
Dummy engine in position:
Image
Image

LH idler arm full lock left; but shows rear engine iron(end plate) and bell housing position
Image

LH idler arm full lock right:
Image
Image


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