EJ swap -- what clutch is needed?

[zyewdall]

So.... I'm putting a dual range 5MT into a impreza outback, and am buying the adaptor kit/drilled flywheel from SJR. However... what clutch kit do I need?

 

I notice that the regular EA82 4wd clutch and the XT6 clutch are the same diameter and spline count, however the EA82 clutch kit says Flywheel Spec: -0.827 and the XT6 clutch kit says Flywheel Spec: -0.815. Slightly different. I'm not actually sure what this even refers to, or if that's close enough to make a difference or not... SJR did not know. What do you think? It's only about $20 price difference.

 

Z

[Quidam]

Hey,

 

"I notice that the regular EA82 4wd clutch and the XT6 clutch are the same diameter and spline count, however the EA82 clutch kit says Flywheel Spec: -0.827 and the XT6 clutch kit says Flywheel Spec: -0.815. Slightly different. I'm not actually sure what this even refers to, or if that's close enough to make a difference or not.... What do you think? It's only about $20 price difference."

 

I'm thinking that measurement relates to how far the flywheel can be machined. From the pressure plate mounting surface to the clutch disc surface on the flywheel. I've got one here that measures 0.805. I looked and the only MFG. I saw giving that number was Rhino Pac. I would think the XT6 would require stiffer springs in the PP, but the clutch kits I've had and looked at give the same PN.

 

Edit: I've used BeckArnley and they use one clutch kit for both applications. The price of those kits is consistant with them using the higher pressure springs in both and doing away with another part number.

 

Could this measurement translate into more clamping force on the clutch disc?

 

Doug

Edited September 25, 2009 by Quidam
Add text.

[monstaru]

several people have used one or the other.as long as everything matches.together.(clutch,pressure plate)

 

most say that the xt6 flywheel is lighter and designed for a street application, and the ea82 flywheel is heavier, better for an offroad or torque application.

 

cheers, rbian

[Numbchux]

yep, the XT6 one is slightly thinner to reduce weight (I would guess to counteract the extra rotating mass in the larger engine, than an actual performance thing).

 

XT6 and standard EA82 clutches are interchangeable. but the XT6 uses a stronger pressure plate. you'll definitely want the '6 one to hold up to the torque of an EJ motor.

[zyewdall]

So... I'm getting votes that the EA82 flywheel is best (which is what SJR provides), but use the XT6 clutch and pressure plate for higher clamping force.

 

Another question.... any idea what front axles I'll need to go from the part time 4wd dual range tranny, to the front hubs of the impreza? There's some guys from CCR working on the swap, so they can probably figure it out, but I thought I'd ask.

 

If anyone's wondering why the heck I'm doing this... it's because I like the EJ engines, and alot of the stuff about the newer subarus (highway speed even on hills, working A/C, air bags, working radio, coworkers don't laugh (as much) that someone with the title of "chief engineer" seems to be driving a $100 parts car turned commuter. But I still use the low range on the old GL almost every day in the winter snow or rocky driveways here, or end up beating up the clutch in the Justy because it doesn't have low range. Not for serious off roading (I have two other solid front axle rigs -- a '76 ford sasquatch and a '67 landrover -- for that). And I got this OBS with a toasted manual tranny for cheap.

[monstaru]

i think it is an awesome idea.rock on.cheers, rbain

[Turbone]

So the XT6 flywheel is a direct bolt up to a EJ?

 

N/M....I just read the PDF.

Edited September 25, 2009 by Turbone

[Numbchux]

So the XT6 flywheel is a direct bolt up to a EJ?

 

no. XT6 flywheel has the same bolt pattern as the EA82.

 

 

on the axles. '93 and '94 FWD 5MT imprezas have 23 spline axles. they must be those 2 years ('95 and possibly '96s were still avail as FWD, but listed as using the same part# as AWD), must be FWD, and must be 5MT. the autos use 25 spline, even with a 1.8l FWD.

 

 

they're kinda rare, but they exist.