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1984 GS RX-7 12a College Student Build on a Budget

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Old 10-18-12 | 01:25 PM
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Hmm I hadnt considered that in tandem with a trans swap. Do you mean an N/A or TII trans? I've got an S4 and an S5 N/A trans sitting in the back yard..
Old 10-18-12 | 02:38 PM
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Originally Posted by 84 GSL
Hmm I hadnt considered that in tandem with a trans swap. Do you mean an N/A or TII trans? I've got an S4 and an S5 N/A trans sitting in the back yard..
FunK73's S4 N/A Trans Swap - is FunK73's post of swapping an S4 N/A into his FB. I think I'll do something similar in mine. I'd love to do a TII trans but that would be a bit more spendy than an N/A trans around here.

The benefits being that the FC transmissions have a higher 5th gear ratio - yielding a higher top speed (if you're into that), lower RPM's when going faster, and they are stronger overall. At least that's what I've heard, and I'd love to do the swap just for those reasons.
Old 10-18-12 | 09:13 PM
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Originally Posted by lindahlish
FunK73's S4 N/A Trans Swap - is FunK73's post of swapping an S4 N/A into his FB. I think I'll do something similar in mine. I'd love to do a TII trans but that would be a bit more spendy than an N/A trans around here.

The benefits being that the FC transmissions have a higher 5th gear ratio - yielding a higher top speed (if you're into that), lower RPM's when going faster, and they are stronger overall. At least that's what I've heard, and I'd love to do the swap just for those reasons.
That's a good write-up. Top speed isn't really my thing haha. I'm more interested in where my RPM's are at compared to wheel speed. And these stock 3.90's are just all around too tall
Old 10-19-12 | 01:04 AM
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Nice build. Did you ever decide what to do with the gauges? I'm thinking about getting some, but I don't even know if I need them, or what ones to get haha.

Also, you should share that CF hook-up :P I need some stuff make up. Thinking 1 face plate for part of the radio deck, and then a pocket for the other.
Old 10-19-12 | 01:01 PM
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Originally Posted by 84 GSL
That's a good write-up. Top speed isn't really my thing haha. I'm more interested in where my RPM's are at compared to wheel speed. And these stock 3.90's are just all around too tall
I see what you're saying, makes complete sense in a track car.

Originally Posted by Ryuske
Nice build. Did you ever decide what to do with the gauges? I'm thinking about getting some, but I don't even know if I need them, or what ones to get haha.
I had them in my car for all of this last summer. Pretty much pointless to have most of them. The only one I kept was the Water Temperature right outside the thermostat to measure exact temp coming out of the block. If I was going to do 3 again, it would be Water Temp, Oil Pressure (stock isn't exactly on and like to see it somewhere else), and probably a wideband O2 setup to adjust the carb and eventually - if all goes well - a turbo.

And don't mount it where I did, dangerous to look that far down. My next ones will be above the vents in the center or above the gauge cluster mounted to the dash.

Originally Posted by Ryuske
Also, you should share that CF hook-up :P I need some stuff make up. Thinking 1 face plate for part of the radio deck, and then a pocket for the other.
That carbon fiber hook up is me I'll be learning how to mold and form it here in a month or two for that car I'm working on and will start to talk to our supplier about the deals ($50/sq ft I believe) he can give me. Should be cool though
Old 10-25-12 | 01:10 PM
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Saw you wanted header. I have a brand new never used pace setter header sitting in storage make me a offer for it. I won't be using it.
Old 10-25-12 | 04:20 PM
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Originally Posted by J-LISS
Saw you wanted header. I have a brand new never used pace setter header sitting in storage make me a offer for it. I won't be using it.
I'll be PMing you here shortly!

As far as the build, I'll be sharing my list that I think will complete the car by next spring, on a budget, for a weekend auto-x and fun car that won't see many miles
Old 11-02-12 | 01:34 PM
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hell yeah I'm 17 and just got my first rex. I love her so much. I can't wait to start building
hell I can't wait to see you finish building!!!
props to your girls gpa
Old 11-03-12 | 07:26 PM
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Originally Posted by jbarton95
hell yeah I'm 17 and just got my first rex. I love her so much. I can't wait to start building
hell I can't wait to see you finish building!!!
props to your girls gpa
"Finish building"

Welcome to the forum! So that was your 11th post... seems like just enough to be able to post in this section. If so, that makes me feel awesome having your first post in the First Gen section be on my build - I'll take that

These cars are awesome, no doubt about that. Addictive as all hell though, I have two cars now and am looking at selling one of them and getting a nicer car for a few years to come, mostly for winter and to put many miles on. You can guess which one I'm not going to consider selling... haha

I'll be posting some pics up this week hopefully of the 7 washed, waxed, and winter prepped to share my process in getting her ready for a 6 month storage. Not sure where I'll be keeping her, but I'll have parts at home that I want to work on so I can get her all ready for her spring debut in May
Old 11-07-12 | 12:42 PM
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Will hopefully be picking up a parts car tonight, will add pics if it goes through!
Old 11-09-12 | 11:39 AM
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Got the parts car!

Some pics





















Will post more later, on my way for hernia surgery! Hopefully it goes well!
Old 11-09-12 | 04:52 PM
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how much for the dog?
Old 11-10-12 | 01:54 AM
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That parts car looks even worse than mine haha xD I actually took the air diverter valve off mine.. Need the air pump fan belt & cruise control is next after smog :P
Old 11-10-12 | 12:12 PM
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Originally Posted by J-LISS
how much for the dog?
Haha 2 year old yellow Lab. Been an awesome hunting dog. Actually, if you look at the first pics I have up on the first page he's on those too

Originally Posted by Ryuske
That parts car looks even worse than mine haha xD I actually took the air diverter valve off mine.. Need the air pump fan belt & cruise control is next after smog :P
I'll be taking out the entire engine, wiring harness, trans, stereo system, and whatever else I feel like soon. Will be a rebuild

It's actually being listed up as a part out in the first gen parts for sale section, but hasn't been approved by a moderator yet.
Old 11-10-12 | 01:05 PM
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Why is it gonna be a rebuild? Do both your cars have blown seals?
Old 11-10-12 | 07:38 PM
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Originally Posted by Ryuske
Why is it gonna be a rebuild? Do both your cars have blown seals?
Nope, neither.

Rebuild thoughts are as follows:

I. I've never seen the inside of a rotary engine and really want to understand how it works. After researching for hundreds of hours over the last year I desperately want to understand why my 7 goes down the road with no pistons.

II. I'd like to build it into a weekend race motor. A port job on both the intake and exhaust ports, to give her that extra oomph to win an auto-x and take her down the drag strip.

III. I'm studying Mechanical Engineering at the U of M and have always had the gear head, mechanical, structural mind that loves to see how things work and be able to explain it to others.

IV. My 7 now has 86,001 mi on the original motor, as far as I know, and is running just fine. But I want to have a spare in case she decides to let a seal go. It's mostly just a piece of mind factor, so I know I have a fully working engine no matter if I keep the one in the car now and just have a spare race motor for later. If I swap em out I can see if I built the race motor correctly and leave it in, with a fully working stock motor out just in case something goes wrong with the racer.

V. I'm always on the hunt for more motors, and cheap ones especially. If I can pick up another 12a for cheap I'd like to have 2 spares, mostly just to play with and study.

Crazy, yes. Insane, probably. I'm just very curious and want a winter project that will last me all year. Plus, it would be something to look forward to when I get her back on the road next May.
Old 11-15-12 | 07:54 PM
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Now researching porting on the other 12a, listed it on this thread 12a Porting Options - Good References, But Questions Galore!
Old 11-26-12 | 06:36 PM
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Well, just ordered this steering wheel adapter from eBay



to hopefully swap to a Grant Challenger Series steering wheel



next spring, just for a change.

Also ordered Forza 4 Limited Collector's Edition so I'll have an 85 SE soon on the game



Old 11-26-12 | 07:14 PM
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My car has the same adaptor kit for my grant gt wheel. Part of the horn scratches that gold plate and makes this god awful noise that drove me nuts.

I ended up moving the horn to a button on the dash and putting cloth between the thing that scratches and the plate. Hopefully yours won't do that but if you end up wanting to move it - or add another horn button, the original is still in tact and I didn't do any wire splicing at all - let me know.

If this was a little confusing its cause I sent it from my phone, sorry xD
Old 11-26-12 | 08:46 PM
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Got my first 1st gen at 15. Drove it through high school, college, and at 35 married with 2 awesome kids I own 2 1gs now. Awesome to see young guys still into working on 7's. Nice thread and keep at it!
Old 11-26-12 | 08:49 PM
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Originally Posted by Ryuske
My car has the same adaptor kit for my grant gt wheel. Part of the horn scratches that gold plate and makes this god awful noise that drove me nuts.

I ended up moving the horn to a button on the dash and putting cloth between the thing that scratches and the plate. Hopefully yours won't do that but if you end up wanting to move it - or add another horn button, the original is still in tact and I didn't do any wire splicing at all - let me know.

If this was a little confusing its cause I sent it from my phone, sorry xD
Thanks for the tip! Will keep your part in mind if mine does something similar during the install.

Will be getting the wheel after Christmas hopefully.

New plan is:

1. Exhaust needs to be done. Will do 2 1/2" thick walled stainless with two Magnaflows behind a Racing Beat header.

2. Sound system. Already have Kenwood head, with new 100W 4 1/2" fronts and 160W 6 1/2" rears that are Kenwood also. Would like to
a. 400W 4ch Kenwood amplifier for the stock 4
b. 2 10" Kenwood subs
c. ~1000W amp for the subs

And maybe some other small mods.
Old 11-26-12 | 08:53 PM
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Originally Posted by roondawg
Got my first 1st gen at 15. Drove it through high school, college, and at 35 married with 2 awesome kids I own 2 1gs now. Awesome to see young guys still into working on 7's. Nice thread and keep at it!
Thanks! I love both learning from more experienced rotary owners and hearing from younger owners like myself. Keeps the dreams alive, and shows me that I will still be in love with them as the years come.
Old 11-30-12 | 02:43 PM
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Well, still working on putting her away for winter. I just remembered that I shot some pics of the cars a week ago and thought I'd post em up for the most current shape of my 7's.







The blue one is getting along in my part out, already made back the money I spent buying it - so that makes me happy

Trying to make some tough decisions on projects that can wait and others that can get done in a timely manner and it all comes down to the money.

Only have about 3 more weeks until school is over for the semester - pretty stoked for that since it will give me some time off to work on the Formula SAE car here at the U of M and it will also give me some money to try and get some other parts to get the 84 GS where it needs to be for next spring
Attached Thumbnails 1984 GS RX-7 12a College Student Build on a Budget-100_1259-1024x768-.jpg   1984 GS RX-7 12a College Student Build on a Budget-2012-11-22-11.50.39-1024x577-.jpg   1984 GS RX-7 12a College Student Build on a Budget-2012-11-22-11.57.37-1024x577-.jpg  
Old 11-30-12 | 06:38 PM
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parts car with black interior! hell yeah, the parts car even has the cool four spoke 80s looking steering wheel in it and the nice basic door cards. Good pick up dude. One thing you should consider while your doing little things is removing the trim that surrounds the windshield and clean it, then paint it fresh coat of black. I keep looking at mine and wanting to do that but winter sucks here for painting anything
Old 11-30-12 | 11:55 PM
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Originally Posted by notveryhappyjack
One thing you should consider while your doing little things is removing the trim that surrounds the windshield and clean it, then paint it fresh coat of black. I keep looking at mine and wanting to do that but winter sucks here for painting anything
Love that parts car so far, super fine catch I agree

I completely agree with that trim around the windshield! I've been looking into doing it since last winter and will hopefully have the guts to take it off and redo it this winter. It's just nerve racking thinking about popping clips that hold it in to take it off, then sanding, priming, and painting. Would like to do all the way around the windshield, then the door trim as well - to get it all back to black


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