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G.I.jonas

Subaru EG33 + My car!

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what about setting up the steering like it is in a honda?? My buddy had a 2003 civic SI, and the steering knuckles are much higher on the entire strut assembly than on most any other car I've ever seen. The steering rack sits up above and behind the motor. If you are going to have to tube-frame the front anyhow, then why not radically relocate the steering and redesign the front suspension?

 

Regarding the transmission, I discovered a long time ago that the spline count and shaft diameters of at LEAST the L-series engines, and the EA series engines, are the same. From what I understand, the EJ is the same as the EA. I have always thought it VERY likely that combining a soobie engine with a datsun or nissan gearbox would likely be a piece of cake. Maybe, for instance, the 4x4 out of a pickup truck... hmmm... is there any way to modify the center diff on that? :flamedevi Anyhow, I would say some research on using a nissan box (either the stocker, or a 240SX or Z32 unit that has been swapped in by many in the past and is already explored territory) might save some trailblazing fabrication on your part.

 

 

 

MY thought on a soobie engine in a Z has always been REAR engine, RWD.... FWD Impreza drivetrain anyone?? That, or twin engine it with an old EA82 on either axle :D

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Regarding the transmission, I discovered a long time ago that the spline count and shaft diameters of at LEAST the L-series engines, and the EA series engines, are the same. From what I understand, the EJ is the same as the EA. I have always thought it VERY likely that combining a soobie engine with a datsun or nissan gearbox would likely be a piece of cake. Maybe, for instance, the 4x4 out of a pickup truck... hmmm... is there any way to modify the center diff on that? :flamedevi Anyhow, I would say some research on using a nissan box (either the stocker, or a 240SX or Z32 unit that has been swapped in by many in the past and is already explored territory) might save some trailblazing fabrication on your part.

 

This is interesting info for sure. I have a pair of EG33 motors that are currently being built with twin turbos. The problem I have been struggling with is that I keep blowing up stock drivetrains in my SVX (on a rather stock build).

I have the T-5 from my 82 turbo in my 73' 240 which could make my SVX rear drive if what you suggest is true. Thanks for the idea.

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This is interesting info for sure. I have a pair of EG33 motors that are currently being built with twin turbos. The problem I have been struggling with is that I keep blowing up stock drivetrains in my SVX (on a rather stock build).

I have the T-5 from my 82 turbo in my 73' 240 which could make my SVX rear drive if what you suggest is true. Thanks for the idea.

 

My information came from a hunch that was supplemented by parts website information.. I forget which, but I *think* rockautoparts.com was where I found diameters and spline counts on the various discs. I haven't had a chance to look at any of the parts, so it is all conjecture. I would LOVE to see something come of the stuff though.

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You could setup the steering like this fellow!http://www.cardomain.com/ride/563982/3

 

Point the rack forward and then up over the engine - uses some FWD steering coupling from memory!

 

But this fellow stuffed in an engine only 800mm wide, stuffing in the Suby motor at 825.5mm is going to be tricky - it flat out wont fit between the strut towers, but isn't far enough away that you couldn't just notch them,

 

Wouldn't like to be the fellow changing your spark plugs though :-)!

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Looking at the pictures of the inside of the transmission, couldn't you just take out the final drive that goes to the front wheels? It's not like its an integral part of working the tranmission. I would just take it out so it would be less wieght, rotating weight as a matter of fact. I've thought about putting a WRX engine in my car here and there, but I want to stay Nissan. At least for now, if I come across one for cheap I would do it.

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How LONG is the EG? Compared to, oh, I dunno, say, a VQ35?

 

Theres a decent chance with some "simple" firewall modification "rolleyesg that the engine could be set up in RWD configuration just behind the strut towers.... *IF* you can get a RWD gearbox onto the silly thing, and have 245 NA factory horsepower coming from behind the front wheels. It all boils down to the gearbox.

 

The front diff carrier is not all that easy to remove from the Subaru gearbox, but it isn't that hard to just "cap off" as long as you have the right center carrier. The fundamental trouble is, Subaru only ever mated the EG33 to an automatic transmission that was not up to the task.. most SVXs out there are out there with bad transmissions, our they specifically say "good transmission" in some way. I know the impreza manual gearboxes are not simple to mount into the SVXs, but I can't recall how easy it is to put an EJ five speed onto the EG engine outside of the vehicle.

 

In my eyes I would want to get the hard parts to see if I could make a real RWD nissan gearbox go onto it, almost before putting any effort into an internet search on EJ transmissions onto EG33. You ARE talking about a 3.3 liter box 6 that has 240 or more in it BEFORE putting boost on it... A 300ZX transmission might be in order. The Subaru gearboxes just likely will not hold up to the task in RWD configuration.

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i agree with daeron... if one has the block, and clutch kit, and has access to a nissan FS5R30A trans from a Z32 or a Late Turbo Z31, as well as some 5/8ths MDF and a mill or a water jet cutter that's local... then I would start with that part first. Once you can get the car to actuate the clutch properly with combo setup, you could work on the other stuff...

 

modifying a chassis to work first and then finding the trans is incompatible or too hard to bother with is not the best idea.

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Just say "screw the transmission" and have the driveshaft coming right out the clutch and just have direct drive like a super modified oval track car, lol.

 

NOT entirely a bad idea; its just crazy enough to work. If we could make, what, 4-500 pounds of torque with this motor and get it into a vehicle package weighing ~2100 pounds, it might even work! Remember, its a bigger motor but there would be no tranny (and thats unsprung rotating mass removed, too)

 

May as well go hand-throttle... Oh wait, now I am building a subaru powered airplane or boat again.... I really need to get better control over my daydreaming.

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I've been thinking of about an EJ swap for the past week or so. This is what I've been thinking so far. This is without knowledge of where or how the engine mounts are or anything. Also assuming tubed front end with SLA/double wishbone front suspension fabricated. I'm not a very good Microsoft Painter but it should give you an idea of what I'm thinking. So far the measurement in red is the one I've been looking for but can't find at all anywhere.

EJ Swap Idea 1_thumb.JPG

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I've been thinking of about an EJ swap for the past week or so. This is what I've been thinking so far. This is without knowledge of where or how the engine mounts are or anything. Also assuming tubed front end with SLA/double wishbone front suspension fabricated. I'm not a very good Microsoft Painter but it should give you an idea of what I'm thinking. So far the measurement in red is the one I've been looking for but can't find at all anywhere.

 

Were you planning on trying to keep the Subaru gearbox on the EJ? If so, your diagram is entirely off. The front driveshafts of the Soobie gearbox stick out right about the middle of the two cylinder bores. If you are trying to set it fully behind the front axle, then you are commiting to either a RWD layout, or a fully divorced transfer casing and front differential like a pickup truck.

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I was planning on keeping it RWD. I don't know about the gearbox issue though. I have an extra T5 so I was thinking of getting an adapter bellhousing machined for the EJ but that would be lots of bucks plus the T5 from 5.0 Mustangs aren't exactly that durable (why do you think I have an extra one?) I figure the best option would to get one with a transmission and just eliminate the front differential portion of it.

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I figure the best option would to get one with a transmission and just eliminate the front differential portion of it.

 

Not as easy as it sounds; The only good option (bear in mind I am far more familiar with the generation of engines and transmissions immediately preceding the EJ, but the auto gearbox on the EJs is identical to one that was prototyped in the older models, so I cannot be too far from the mark) is to simply remove the front drive axles and "plug" them up.. but you are still spinning the entire front differential assembly. "Just removing it" isn't an option, it is an integrated transaxle.

 

 

The 3 speed automatic that was in MY old subaru (EA series, NOT EJ) was the same FS23985098120983C gearbox (don't know the number exactly) from Hitachi that was also put into the automatic Z-cars and RWD Maximas, the pickup trucks, and the 240SXs. The Electronically controlled 4 speed auto that was fitted to later Subaru EA series cars, was its direct descendant (andhonestly, much more related to the 240SX auto and the later pickup autos than our old 240Z auto.) All of the gearboxes, manual or auto, are made by Hitachi, for both Subaru and for Nissan.

 

ALSO, at one time, I had done some research and discovered that the input shafts on the transmissions (i think i was checking an S30 trans) were QUOTED as having the same diameter, and the same spline count. Note: this is research done via parts website lookup, NOT hand-eyeball measurement. In other words, the Subaru clutch disc might well spline onto the input shaft of, say, a 5 speed from a 240SX.... AND there is even a fighting chance that you could remove the bellhousing from an EJ transmission, and splice it onto a 240SX transmission. (Similar to what has been discovered with using a 240SX 5 speed on an L28.)

 

 

 

There is data out there that suggests ALL of this could be relatively simple. (Also, I am fairly certain I posted it earlier on in this thread.) Nobody has yet taken the opportunity to physically check out the transmissions and the engines and see what would need to be done to make it work.

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So you're saying that you can't just remove the ring and pinion gears that go to the front axle?

 

I think my best option would be to find a suitable transmission that will fit like you said because the transaxle looks really long in the photos which makes sense because in the Impreza the engine does sit in front of the front axle line and has to extend all the way to the cockpit for the shifter.

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Thanks for the photo, that came to 20.7 so I'm confident I can do it now. So after I get back home I'm gonna start putting all my spare parts on eBay to try to get a good chunk of cash to buy an engine now. I've gotten so many free parts over the past year or so, a Z full literally. Since my Z is sitting I have it FULL of spare parts, and I even had to store other parts underneath the car. It would be a start at least, something to put aside until I find a job or join the service, depending on what happens.

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Measurements are not perfect, but should be accurate to at least two tenth's of a millimeter. I didn't know which numbers you might need so I put them all in. I hope it's not too many.:-D I no longer have a clutch to measure, but the input shaft bearing on the flywheel is about 8.9mm in from the bellhousing mating surface.

 

mt7.jpg

 

m7.jpg

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Whoah, you're awesome. Did you take all the measurements yourself or did you find them somewhere? I meant the other end of the bellhousing, the part that bolts to the transmission (if the transmission and bellhousing aren't one unit) but I feel like I'm asking too much from you now.

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Those are awesome looking, something I'd like to have in my house as a conversation peice. Thanks for taking all the time to get me the info, I think you just might be more excited about the idea than I am :D I guess it's time to find a suitable trans, if all else fails I can just get a custom bellhousing.

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Do you have the measurement from the front to back of the engine? I've read it was 18" but I don't know if that was the 4 cylinder or the 6 cylinder. Also, is the physical size of the engine different between the EJ20, 22, and 25s? I assume they're all the same block and heads and stuff, just different bore/stroke, but I don't really know.

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