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infernosg
infernosg Reader
4/19/22 9:48 a.m.

In reply to P5Racer (formerly BMWGeoff) :

215 whp was the furthest I ever pushed my stock block and transmission and it only ever saw street use. I had every bolt on available and 10 psi on a slightly upgraded turbo if I recall correctly. I also seem to remember these turbos not liking high oil pressure at all. It looks like you're using the stock MSP oil feed line so I wouldn't think that a problem but I know guys that made their own lines often used a restrictor at the turbo. I know I did with a -4 AN feed line. The oil return could also be an issue but again, it looks like you have the stock configuration. The aftermarket/DIY solutions always seemed to place the return too low in the pan or had the line kinked in weird ways, which could cause oil to back up to the turbo. With no place to go it blew past the seals.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
4/20/22 3:02 p.m.

Onboard video of one (slow) lap around Mosport: https://www.youtube.com/watch?v=q3tBv9MkHy8

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
4/23/22 3:00 p.m.

Transmission is out, and the problem has been found. 

The retaining nut for 5th gear wasn't peened correctly and backed off the shaft, cutting into the end cover. 

The gear itself was able to move on the shaft, pushing on the shirt fork, causing the transmission to kick out of 5th gear. 

Amazingly, there appears to be no other damage, so a new nut and cover, and the transmission will go right back in place.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
4/27/22 10:02 a.m.

Got the turbo back from the rebuilder, the turbine wheel has definitely seen better days.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
5/9/22 7:26 p.m.

Almost all back together... hitting the track again this weekend.

CyberEric
CyberEric Dork
5/10/22 8:32 p.m.

Nice! Hope it goes well.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
5/16/22 2:57 p.m.

In reply to CyberEric :

It did... then it didn't. Clutch go BOOM.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
5/18/22 8:51 a.m.

Onboard video of my fastest lap 1:46.1 https://youtu.be/nJLAXuRDtik still lots of room for improvement.

And the clutch going BOOM https://youtu.be/uKRa4ik5HfE while my co-driver was in the car.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
5/26/22 11:37 a.m.

The remains of the clutch... the transmission is damaged internally as well, details to come once it's opened up.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
6/17/22 1:15 p.m.

Well that's not good.

jfryjfry
jfryjfry SuperDork
6/18/22 7:35 a.m.

Oh no.  That clutch let go spectacularly.  Do you think the trans broke and sheared the clutch or vice versa?

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
6/19/22 8:17 a.m.

In reply to jfryjfry :

I think the trans failed first, causing the clutch failure.

P5Racer (formerly BMWGeoff)
P5Racer (formerly BMWGeoff) Reader
7/20/22 4:10 p.m.

A little status update:

Decided to swap the engine, as well as the trans due to oil consumption issues. Unfortunately, a back injury shut me down for a month, so I'm just starting to get things back together now.

The new Bully clutch kit

Lots of room for activities now

The spare long block, dressed and almost ready to drop back in

2 spare transmissions to choose from

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