Joining the Porsche family, track rat style.

[WizardSmokey]

Originally Posted by truegearhead

Man I love this! How much weight do you think you cut out?

Honestly, I don't think I cut all that much out. Maybe 20-30 lbs or so.

[truegearhead]

I’m worried about drive axle angle. It looks pretty severe, I know the LS swaps struggle with even the slightest angle, the axles fail. Is the angle as bad as it looks?

While I’m armchair quarterbacking I’m also a little worried about the transmission support you’re using. It looks like you’re using the rear muffler mount on the transmission to support the transmission / back half of the engine. The mount it’s self looks great but those aluminum posts on the transmission that hold up the exhaust are very weak. They commonly break holding just the muffler. I would think under a launch the weight of the transmission and engine along with the torque of the engine trying to rotate would easily snap the aluminum posts.

[Qingdao]

Originally Posted by truegearhead

I’m worried about drive axle angle. It looks pretty severe, I know the LS swaps struggle with even the slightest angle, the axles fail. Is the angle as bad as it looks?

Is there an angle associated with this? I've been nervous about this in my build since the beginning (not nervous enough to stop). I figure there are ways (less than scrupulous) to fix this issue.

As for my trans I'm about an inch back from stock. I don't know if that is gonna cause any issues.

[truegearhead]

Originally Posted by Qingdao

Is there an angle associated with this? I've been nervous about this in my build since the beginning (not nervous enough to stop). I figure there are ways (less than scrupulous) to fix this issue.

As for my trans I'm about an inch back from stock. I don't know if that is gonna cause any issues.

I’ve heard the general rule of thumb is 3 degrees max. The Boxster S has some axle angle so a little angle should be fine depending on how much power you have. A lowered car can get away with a little more than stock since it has less vertical angle.

[Qingdao]

Originally Posted by truegearhead

I’ve heard the general rule of thumb is 3 degrees max. The Boxster S has some axle angle so a little angle should be fine depending on how much power you have. A lowered car can get away with a little more than stock since it has less vertical angle.

Lowered car or raised trans

Thats the kind of less than scrupulous redneckery I plan on doing if I have axle issues. That and moving around rear geometric things like spindle placement. I don't think I'm gonna have to do such things as my engine isn't as big as a V8, but time will tell.

At least in my case for the moment both axles fit to the gear box fine, and spin round without any binding or anything. I could only simulate what the car would be like on the road with a jack under the spindles.


EDITED:

Because my engine is still being machined I have to rely on old stock photos, but it looks like my trans is farther forward than the OP's.

Trans positioning has had me worried from the get go on this project of mine. I think the OP is gonna have his done long before I finish mine. He's just got more room to work on things

[truegearhead]

Originally Posted by Qingdao

Lowered car or raised trans

Thats the kind of less than scrupulous redneckery I plan on doing if I have axle issues. That and moving around rear geometric things like spindle placement. I don't think I'm gonna have to do such things as my engine isn't as big as a V8, but time will tell.

At least in my case for the moment both axles fit to the gear box fine, and spin round without any binding or anything. I could only simulate what the car would be like on the road with a jack under the spindles.

Maybe I’m thinking about this wrong but wouldn’t raising the trans increase the angle and make the problem worse (unless the car is very very low)?

[Qingdao]

Originally Posted by truegearhead

Maybe I’m thinking about this wrong but wouldn’t raising the trans increase the angle and make the problem worse (unless the car is very very low)?

haha; yeah you're right. I guess I didn't have my head on strait; then I thought about it.

I shoulda said the trans can be moved up, down, for or aft to accommodate better angles.