Yeah I'm on holidays this week so this is my down time before my wedding later on this month(my 1st baby due in late Sept too--- ).

I plan on installing the phantom grip in my stock open diff and putting it up for sale(as long as my cross pin has no slop/wear).

How's your new RMW camshaft treating your MINI Longboard?

Jeremy

 

Congrates on the wedding and the little one the way. I have four kids .

The car is still up at MiniCorsa. I should get it back this week. The head on my car was the first RMW head. The productions units had a couple things mine didn't so Jan's fixing that while we have the head off. Danny's also adding a new oil pump, IE fixed camber plates and fixing a bad sensor.

Once I get it back Jan's going to tune it then I get to play.

Bryan

 

Ahhh shucks, I thought you would have had your MINI back by now and ripping up the pavement. I

'm glad that Jan's tweaking your pre-production RMW head and tuning it yet again. A bunch of us are awaiting results from the Project X-300 thread!

Adding a little more negative camber up front should be in my future too!

Jeremy

 

Ya, Jan is a stand up guy.

Add me to that bunch that's waiting for results . Seriously though Jan has been so busy that I have taken a back seat so many times I forgot how long this project has taken. I am really excited to get it back as this should be it!! I have some killer dyno sheets but until it was finished I chose not to share. I will now as we should be done.

Longboard

 

Looking good Jeremy...congrates on the fam too!

 

Ok Ryan my stock open diff is about 15 pounds with the crown wheel gear and stock diff bearings still mounted! I'll weigh the OBX when I get the bearings and crown wheel gear bolted up.

The red loctited diff bolts(M10 by 1.5) from the factory let loose between 50-65 ft-lbs. I thread restored them and hit them with brake cleaner. I'll have to find the correct tourque setting for those bolts now, before I snug them up! I think K-huevo did them @ 70 ft-lbs.

I just baked my new diff bearings for 20 minutes at 350 F, and they slide right down onto the OBX diff! I was ready with a 1/2 drive extension mounted inversely to a 36 mm socket to go to work with a BFH, but there was no need!

Jeremy

 

Nice thread Hope you get to enjoy your new goodies soon...

 

Yeah I hope to enjoy these goodies soon MiniMacPR!

I'll be off shopping for wedding attire tomorrow afternoon, but I hope to mate the gearbox to the motor before I leave.

I torqued up the thread restored diff bolts and torqued-in 10 ft-lb steps-from 30 ft-lbs up to 60 ft-lbs. Oh yeah and the diff bearings were baked at 350 F for 20 min and they dropped right onto the new OBX diff! I'm thinking 70 ft-lbs may be excessive for the short M10 by 1.5 bolts even though they are grade 12.9. Pics below.

Jeremy

There's the 6 speed bell crank shaft at the top. Too bad reverse gear on the left is in constant mesh with 1st gear. What a power soaker. :-( Trans is in neutral now because of detent spring pressure, and ready in the 3rd-4th gear plane because of the giant spring at the left end of the bell crank shaft!

New bearings and crown wheel gear cleaned and blown off. Bearings are ready for a warm up in the oven!

Diff bearings on OBX without incident! I had a 36 mm(oil filter socket) with a 1/2" drive extension mounted inversely on hand to BFH the bearings on the diff if need be.

Side shot of course.

There's a standard 3.44:1 crown wheel and pinion from a Mini on the left for comparison. haha

New diff snugged up for a final torque up!

 

Keep up the great work!

Thanks for the weight statistic, I'm very curious to know how much the OBX diff weighs in comparison. Then the only question will be how much does the Rev.A Quaife I have in my car weigh, as I forgot to weigh my stuff during my recent install.

Cheers,
Ryan

 

Original Quaife 14lb 2oz

 

I think it's a clutched diff... rather similar to the stock one. I was just saying that the geared design from the OBX/Quaife is better (Doesn't wear out).

 

So, what do you all recomend...OBX or Quaife???

If I would have the money for either, would I know a difference?

Do they handle different amounts of power?

Thanks

 

Ok Ryan,

I weighed the OBX diff in at about 20 lbs with crown wheel gear and both diff bearings. Note: My scale is a bathroom scale so the error is likely (+-)1 pound with all the measurements I've taken in this thread. Anyways, the upshot is that the OBX ATB diff is about 5 lbs heavier than the stock open diff.

Here's a few videos I quickly made up this morning while my coffee was brewing.

Shift Mechanism
http://www.youtube.com/watch?v=07uRhOnk3h8

Getrag Gearset
http://www.youtube.com/watch?v=OmBJ03-OEfo

Reverse Selected
http://www.youtube.com/watch?v=6gLvJFiFRZk

Now for a final surface prep before I lay down a bead of sealant and close in the trans. BTW the trans magnet was in great shape with just a star shaped sludge of ultra minute metallic particles!

Jeremy

 

What are your plans for checking gear mesh and/or shimming the differential? (I've been trying to figure this part out for my install)

 

Gear mesh should be ok(stock crown wheel gear still being used), as long as the OBX and the stock open diff cases are the same length. Perhaps I should check that over. haha I didn't replace the outer diff races but they look AOK with I'm hoping close to zero wear. I'll go compare before I bolt her up! If it's under a few thou difference I should be ok!

Jeremy

 

Danny has an OBX, I have a Quaife, we lined them up side by side, aside from a few washers (which he stuck in his) they're identical. The cost didn't matter for me, so I went with Quaife. OBX is the same thing.

 

Quaiffe vs. OBX I think 90+% you will find no difference, I bought a used Quaiffe simply for a little more piece of mind... .but I do wonder if I over spent and should have gone with the OBX (though I wonder on their customer support)

 

Thanks Rusty and kgardnez

Depending on money...I will go with the OBX...

 

Chris read my Post # 7. Make sure she's all good to go before you throw it in!

Today, my Dad managed to help me align the trans with the motor and bolt her back up. It got a little tense but after 25 minutes or so and a slight rotation of the crank, the input shaft slid into the clutch disc! Bingo!

A few pics from today.

Jeremy

Trans side of flywheel housing all clean and ready for new seals.

Cleaned up and ready for a new guide tube, input shaft seal and clutch release bearing.

Even Steven here.

Even Steven there.

Smooth bead.

 

Kgardnez see pics above. Everything seems spot on!

Has anybody out there had to shim their Quaife or OBX diff????

Jeremy

 

What kind of sealer did you use?

We normally use an anaerobic sealer.

 

When you have a chance, could you list the parts you replaced and why.

 

I used Permatex Ultra Black J propane.

Kgardnez I did the input shaft seal and guide tube just because I was there. My guide tube was scored up a bit so why not replace it. Next time I do a clutch on this MINI I'll replace the plastic bushings for the clutch release shaft(they're ok now). Your clutch kit will most likely have a release bearing included. I replaced the output flange seals for the half shafts(no new diff fluid is going to get swept out of case). I didn't replace the rear main oil seal as it looked fabulous. I finally installed my transmission mount powerflex insert because the mount was off the car anyways. I'll need some heat resistant tubing to cover up my nylon oil pressure line that runs near the exhaust manifold. The wimpy plastic tubing I put over the line was melted pretty bad. It lasted for a year though! I've also got a fastener set from MINI Yaletown to use when I install the front subframe/suspension. Finally I've got powerflex sway bar bushings, steering rack bushing, and lower control arm bushings(my stock bushings look pretty good though). I think that's all.

Jeremy

 

Gear shimming, I know how to do that on airsoft guns, but how would you shim the dif if you had to?

Quick question, what torque values did you use for bolting the two halves of the gearbox together?

 

You'd have to shim in between the diff case and the inner race of the diff bearing. Luckily OBX measured correctly, or so I hope!

I tourqued the flywheel housing to the gearbox at 27 ft-lbs. The bolts are M8, cadmium plated and are going into aluminium. I thread restored all of the bolts(I think there are nineteen).

Jeremy