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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Jul 09, 2012 9:51 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
I can't mach them to the irons because these are just photos someone sent me. Thanks for the help

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Thu Jul 12, 2012 2:52 pm 

Joined: Thu Oct 01, 2009 8:00 pm
Posts: 31
Location: Australia
They are definitely late model RX-7 era 12A Housings, not early 12A Twin Dizzy ones.

The early single dizzy 12A Housings simply Mazda written in big italic font, sort of like MAZDA not the small later style font like in those pics.
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The Twin Dizzy motors had a rounded shoulder where the Mazda is written on those later rotor housings you have, with no Mazda logo at all. Hard to see clearly but you can see no Mazda cast into the housing.
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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Fri Oct 05, 2012 10:01 am 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
started cutting the old paint to see whats under there. basically free if you have free time. so much money into home remodels and other cars, havent had much time/cash to work on this thing this summer.

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i plan on going over it again. i rubbed the pass quarter by hand and it has a lot more gloss than the drivers side which i used a machine for.

used compound then over with polish.. i think it will look good enough to drive on til next winter.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sat Oct 06, 2012 2:56 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
decided to try out another cheap restore. some semblance of progress is always nice.

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used a hobby resin meant for lakes and such for tabletop models. it has a few tiny airbubbles in it but the bottle says that they will remove themselves naturally during the 24 hr cure.. so i guess ill see what i wind up with tomorrow.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sun Nov 04, 2012 4:43 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
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:oops:

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sun Nov 04, 2012 4:55 pm 

Joined: Thu Jun 12, 2008 4:28 pm
Posts: 142
Location: Tampa FL
Very Cool! What trim turbo is that? 12A or 13B? can't really tell. Really liking what I'm seeing!!!


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sun Nov 04, 2012 5:11 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
its a factory turbo 12a engine. turbo is garrett air research. not sure the trim. no markings and havent measured it yet. going to pull everything out and start cleaning and patch up my fender well hole now that it fits.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Nov 05, 2012 11:20 am 

Joined: Sun Feb 11, 2007 12:49 am
Posts: 530
Location: SO-CAL
man that turbo hat is pretty bad ass. Great find!!!


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sun Jan 20, 2013 4:28 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
winter and other cars getting in the way slow things down but still not stopped

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sweet 13x7 wheels front tires are 175 70 rears are 185 70

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Sun Jan 20, 2013 4:44 pm 

Joined: Mon Feb 15, 2010 5:50 am
Posts: 103
Location: Williston SC
Looking good! What happened to your gas lid?


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Jan 21, 2013 3:46 am 
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Joined: Fri Feb 26, 2010 4:01 am
Posts: 45
Location: South Africa
Very Nice!!!!

I like the blow through turbo setup.

I am tuned in on this one. Keep up the work.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Fri Jan 25, 2013 12:36 am 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
I'm not sure what happened to the lid but theyre rare so disappearances must be common

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Fri Jan 25, 2013 5:17 pm 

Joined: Thu Jun 12, 2008 4:28 pm
Posts: 142
Location: Tampa FL
derek wrote:
I'm not sure what happened to the lid but theyre rare so disappearances must be common

Yeah the glue Mazda used to bond everything was shit. I've heard of peoples hoods bubbling up at highspeeds because the glue failed. It also causes rust, overall the stuff is bad news. At least the lid isn't too hard to make out of sheet metal.


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Mar 04, 2013 8:28 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
cut the remote shifter down on my 12a trans.
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been working too often on other cars. goal is to have this thing under its own power by june.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Fri Mar 15, 2013 2:00 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
no pictures at the moment but i have been working on it.

i ended up going with a shortened s4 12b na transmission.

welded in a turbo drain line and resealed the oil pan. installed clutch and transmission and slid it in the car.

turbo still hits the frame rail even after i raised the holes on the engine mount and added a few spacers on the motor mounts. i also flattened the frame rail about 1/4". seems like it hasnt gone anywhere.

clutch fork is hitting the trans tunnel so i need to massage that area too.

good news is that the trans mount is super easy. just a pair of L brackets out of 3/16" strap steel.

still need to cut the shifter hole back a few inches but i think i can get away with the stock shifter location on the center console.


question. when 12v+ straight to the starter motor lug. should it spin? i thought it only lit up after the solenoid was engaged but my motor will spin as soon as it sees power.

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Apr 29, 2013 5:57 pm 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
so i was really really dreading cutting in to the frame to fit a dumb turbo but i really couldnt work a solution. so this weekend i figured 'what the hell'. and started chopping
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after i peeled off the top layer, i saw 40 years of dirt and dust nearly brim full in there. completely dry and frame rails are just surface rust which i treated. but it was kind of cool to take out a brick of dirt.

in an attempt to reintroduce rigidity to the frame, i added a couple bulkheads and welded them in
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then i made a top plate
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and welded it in
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and finally i made the rear piece and welded it in, shot it with rust preventative primer and then a coat of semi gloss black to further help seal it and hide my bad bad welds
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im not a welder. in fact, this is my first time welding anything more than a random spot weld every few years. im satisfied with the results as ive seen far worse, but ive seen better too. still have to tackle the wheel well and not quite made a decision as to how but thats for next weekend.

with the engine in place, i could finally start making a trans bracket, except now the engine had a 15* tilt. so again.. contemplation on cutting into my baby.. i had to do it now..
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and then i reused the factory boot cover. probably going to replace the metal up front although i know most people dont do that.
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and finally, this is how it lines up with the console. im not sure if i want to bend and cut the shifter to fit the console, or mount the console back an inch
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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Mon Apr 29, 2013 9:31 pm 

Joined: Thu Jun 12, 2008 4:28 pm
Posts: 142
Location: Tampa FL
Nice! not sure about this but I heard from a family member with a powerful RX2 that because of the thinness of the metal if you don't completely remove the rust in the area before you start welding it the heat will make the surface rust accelerate and turn into cancerous rust. anyone want to confirm or disprove what I said? because I'm not sure about this.


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Tue Apr 30, 2013 3:23 am 

Joined: Tue Sep 27, 2011 4:15 am
Posts: 317
Location: Adelaide
:cry: fab manifolds not chassis rails.


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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Tue Apr 30, 2013 9:37 am 

Joined: Thu Aug 13, 2009 7:27 am
Posts: 350
Location: salt lake city
I thought about a manifold but I really wanted to keep the hks piece. Fabbing a new mani meant reengineering the whole turbo kit

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 Post subject: Re: rx2 build: ヘドラ Hedora
PostPosted: Tue May 07, 2013 2:48 am 

Joined: Tue Sep 27, 2011 4:15 am
Posts: 317
Location: Adelaide
derek wrote:
I thought about a manifold but I really wanted to keep the hks piece. Fabbing a new mani meant reengineering the whole turbo kit


Sorry, didnt mean to sound negative. :cry: Just sad to see a nice classic taken too with a grinder to fit a motor that will only last a small portion of the cars life. Personally I would have tweaked/re-made the exhaust manifold to locate the turbo up off the rail and kept the HKS top hat or plenum. That way when the 12a lets go and you swap it out there wont be evidence of previous mods. I fitted a stock 12a turbo with stock exhaust manifold into an 808 with no massaging or cutting to the chassis rails or gearbox tunnel by just getting new mounts fabricated.

Keep up the good work! absolutely love that colour Green.


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