Subaru transmission installation, Now it's a reality!!! Options

[quikshft]

I will be offering one on my own pretty soon.
Steve

Well I just finished reading this entire thread and as of yet I don't even own a 914. (IMG:style_emoticons/default/idea.gif) Steve you had noted previously in this novel that you would be writing a technical article for an online 914 magazine, did that get accomplished? Where could a person read this?

[Porcharu]

I have not done this yet - having a job and a 4 year old kind of f's everything you had planed out. I also bought my first house and have that to deal with that (it's a 140 miles away from where I live.) Someday soon I hope - the shop is starting to look good.
Steve

I will be offering one on my own pretty soon.
Steve

Well I just finished reading this entire thread and as of yet I don't even own a 914. (IMG:style_emoticons/default/idea.gif) Steve you had noted previously in this novel that you would be writing a technical article for an online 914 magazine, did that get accomplished? Where could a person read this?

[ldscamaross]

has anybody tried using both sides of the bus axle cv? the cv is 100x6 and i think the 911 stub axles would work. i think the year range i was looking at was 76-83 or so. im not sure if the splines for the 911 stub axle are the same as the 914-4 has any body looked into this?

[G Man]

I too am currently a non owner. I really like the idea of a Subi engine and trans combo. My only issue is that I need an automatic trans due to nerve damage in my back. Is it possible to modify a Subi auto trans to work in a 914 application. Seems like it would be easier than a manual since there is no shift linkage to deal with other than a shifter cable. Does this sound reasonable?

[rick 918-S]

Nice build. I thought I would add a link to the DYI Bremar AWD to 2WD. Interesting way to save a couple bucks if you have the skills.

http://www.914world.com/bbs2/index.php?showtopic=104513

[atsealevel914]

I too am currently a non owner. I really like the idea of a Subi engine and trans combo. My only issue is that I need an automatic trans due to nerve damage in my back. Is it possible to modify a Subi auto trans to work in a 914 application. Seems like it would be easier than a manual since there is no shift linkage to deal with other than a shifter cable. Does this sound reasonable?

possible? yes. I wanted to go the same route. you need a FWD 4eat. There are several ways to deal with the electronics and an lsd front diff is available too.

[DBCooper]

.

OK, we have liftoff. The transmission is in, the car running, and it's all excellent. These are those famous flanges (thanks again, Steve):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996018.1.jpg)

Closer view:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996019.2.jpg)

The cable shifter and more of the engine cradle:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996019.3.jpg)

Engine compartment:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996020.4.jpg)

New pedals (easier than modifying the 914 pedals for a hydraulic clutch master):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996021.5.jpg)

Cable shifter inside, and the ECU (which will all be covered with an armrest/storage cubby):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996022.6.jpg)

And the front heat exchanger for the water-air intercooler:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996023.7.jpg)

Most important for anyone reading this thread is that it all works great. The car's in California so I haven't driven it yet, but my sons have and say it's perfect. Shifting is notchy, fast and smooth, just like a normal car. Those are their words, it shifts "like a normal car". I think we've really hit on the perfect combination, retaining all the good qualities of the 914, the reasons I liked this car to begin with, but triple the power with a good strong modern and efficient power train and no extra weight.

This ended up being more work than we initially thought, but the results are super, much better than we expected. We did good. Really really good.

There are more details in THIS thread, and more photos HERE

And Steve, you need to edit the title of this thread. It's not a "Subaru transmission possibliity". It's real.
.

[db9146]

You guys going down the Suby path are doing some great work getting all of this pulled together. While I'm convinced at this point that I want to continue my conversion with a Porsche engine, I have been watching this and thinking about the possibilities of putting one of these transaxles behind a 6-cyl. since all of the other Porsche options I've looked at (915, G50, even modified 901 and Audi trans) are so expensive and still result in less than ideal shifting.

I've never heard of anyone trying to mate a Suby trans to a Porsche 6-cyl. Do any of you guys with the Suby transaxle experience have any idea if this is a possibility? Or any direction you can point me in to do a little more investigation?

Thanks.

[d914]

kennedy for an adapter plate and or clutch, then do a cable shifter.. the reverse has been done for 911"s...suby 6 to a 915...they should be able to do a porsche 6 to a suby tran!!

[Porcharu]

Take a look at Andi's thread regarding 944 flanges, they are a direct fit and allow the use of 100mm CVs on both ends.
Steve

has anybody tried using both sides of the bus axle cv? the cv is 100x6 and i think the 911 stub axles would work. i think the year range i was looking at was 76-83 or so. im not sure if the splines for the 911 stub axle are the same as the 914-4 has any body looked into this?

[Porcharu]

OK consider it done. Can't wait to see your car.
Steve

.

OK, we have liftoff. The transmission is in, the car running, and it's all excellent. These are those famous flanges (thanks again, Steve):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996018.1.jpg)

Closer view:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996019.2.jpg)

The cable shifter and more of the engine cradle:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996019.3.jpg)

Engine compartment:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996020.4.jpg)

New pedals (easier than modifying the 914 pedals for a hydraulic clutch master):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996021.5.jpg)

Cable shifter inside, and the ECU (which will all be covered with an armrest/storage cubby):

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996022.6.jpg)

And the front heat exchanger for the water-air intercooler:

(IMG:http://www.914world.com/bbs2/uploads_offsite/i379.photobucket.com-2618-1268996023.7.jpg)

Most important for anyone reading this thread is that it all works great. The car's in California so I haven't driven it yet, but my sons have and say it's perfect. Shifting is notchy, fast and smooth, just like a normal car. Those are their words, it shifts "like a normal car". I think we've really hit on the perfect combination, retaining all the good qualities of the 914, the reasons I liked this car to begin with, but triple the power with a good strong modern and efficient power train and no extra weight.

This ended up being more work than we initially thought, but the results are super, much better than we expected. We did good. Really really good.

There are more details in THIS thread, and more photos HERE

And Steve, you need to edit the title of this thread. It's not a "Subaru transmission possibliity". It's real.
.

[brownbear]

hey i'm new to the 914/subaru world, I have a 76 914, ready to start swapping in my 93 ej22t and 95 fwd 5 spd. I'm still thinking about the axle solutions and haven't decided which way to go yet. I have built my shifter using a 2002 dodge neon cable shifter, similar to a dsm. has anyone run into any bumps I should know about and I'm also wondering about options for motor and trans mounts, any suggestions on shortcuts. i've seen the mounts from smallcar, looks like an easy way to skip some steps. will these clear a turbo's manifolds? (IMG:style_emoticons/default/biggrin.gif)

[J P Stein]

To take the next step up the XP ladder, the shitbox is gonna need a serious power infusion. The 2 valve motor just can't get where we need to go because cost IS an object....as is engine size. The SCCA (in it's wisdom (IMG:style_emoticons/default/rolleyes.gif) ) has a multiplier of only 1.4 for boosted engines so a 2.0L TT Subie would equal 2.8L for classing purposes. The last top flight XP car we came across was a supercharged Beemer packing 500 hp. I wouldn't mind being down 100-150 hp, but gawdamn, double is a bit much. Annihilation is the operative word here.

Autocross is a game of mid range torque and a twin turbo Subi would seem to be the ticket to get the job done. I have heard rumors of a TT JDM Subi motor..anyone got a handle on that? I'm thinkin' the 901 will hold up as we don't use first gear and the tires aren't gonna grow all that much..for now.

[DBCooper]

You probably don't want the Japanese twin turbo, those turbos are serial, not parallel, and I don't think ever worked that well anyway. Good news is that to can do what you want and keep it simpler. The later 2.0 STI engines made 300hp stock. With forged pistons and some general upgrading (cams, larger injectors and boost) they get a generally dependable and everyday drivable 400 hp. Engine as little as $5-6000 total if you're careful and work at it, more if you want. Would that work?

The Subaru turbos shouldn't break the 901. They're all about mid-rpm torque, and it's not banging brutal like a V8.

[d914]

the tt motors are cheap and outfront has the header to make this work.. Two small turbos feeding one intake.. With the after market computer its a piece of cake.. I want to do a dune bugg this way.... The out put is still in the 280-300 range..

[effutuo101]

Great work. clean and tidy. I can't wait to see it in person.

[d914]

oh not mine....looks like fun though..I have a single turbo

[stephenaki]

Very, very nice. I'm jealous! I still have a few years before I down the path of a complete resto-mod but your work definitely has given me some ideas when I am ready. (IMG:style_emoticons/default/aktion035.gif)

[J P Stein]

You probably don't want the Japanese twin turbo, those turbos are serial, not parallel, and I don't think ever worked that well anyway. Good news is that to can do what you want and keep it simpler. The later 2.0 STI engines made 300hp stock. With forged pistons and some general upgrading (cams, larger injectors and boost) they get a generally dependable and everyday drivable 400 hp. Engine as little as $5-6000 total if you're careful and work at it, more if you want. Would that work?

The Subaru turbos shouldn't break the 901. They're all about mid-rpm torque, and it's not banging brutal like a V8.

Sure, only 100hp down works just fine. Still in the research sage and single turbo dyno sheets look good to me. The 2.0L is a JDM engine and the "beef" is needed.

Come winter you just may see a conversion kit for 4 to 6 FS....complete with aux. oil cooler & all. (IMG:style_emoticons/default/biggrin.gif)

[charliew]

A little correction on the 300hp sti, it's a 2.5. TT jdm 2.0 was between 240 -280 depending on which body style and tranny and year and on higher octane fuel in japan. A 2.5 sti with forged internals, bigger valves, ported heads, cams, springs and retainers, bigger injectors, bigger rotated turbo external wastegate and standalone ecu with a good air cooler is gonna knock the heck out of 9k probably if you assemble and tune it yourself. In other words no labor.

2.5 with forged internals- 2000.00 minimum, pistons are 500 and rods are 500 but stock are ok, you gotta bore it or try to use drop in pistons bearings are 200 head gaskets are 100 oil pump is 100-150
usdm 2.5 acvs heads with bigger valves and ported 2000.00 jdm heads have bigger ports to start with but they have 2.0 chambers
springs retainers and cams 1500.00
injectors 600-800.00
30r turbo to make about 29 lbs boost 1200.00
goodheader 400.00
wastegate 150.00
arp head studs 150.00
intercooler or water intercooler 200.00 not counting plumbing
fuel pump 125
ati front balancer to keep hormonics out of oil pump 400.00
ecu 1500.00-2500.00
aquamist to keep boost safe and run more timing 800.00
these prices are mostly low
This motor will make 425-450 at the wheels at 7k maybe more on a good cool day with a good tuner pushing it but to be safe with getting gas everywhere 400 hp at the wheels for sure.

also oil dissapears in suby turbo motors more than inline or v motors so a bigger oil pan would help save some money down the road.