What's wrong with this picture? - Page 3 - PeachParts Mercedes-Benz Forum

KarTek · #31 09-16-2008, 11:02 AM

The bolt would be a nice simple sloution though I can't figure out where I'd put it unless I did some welding on it. The mount has bolts from the top and bottom so I couldn't put it through the center.

I'm kind of liking the strap idea. It's similar to the old trick of the drag racers using a length of chain. The strap is nice because it's not solid and won't transmit vibration to the chassis when tight. Hmmmmm...

KarTek · #32 09-16-2008, 08:48 PM

Zeroing in on the exact mounting location:

A few reference marks:

Some clearance issues:

Next step will be to complete the welding jig, create the CAD/CAM file for the manifold flange and send it to the shop for water jet or laser cutting.

As for the torque limiting strap, it'll be a simple matter of using the bolt on the top of the mount to pass through the eyes in the end of the strap and then I can wrap the strap around the cross member.

#33 09-17-2008, 02:37 AM

Or since you are going to the trouble of having a custom manifold made, you could make some custom mount bushings.

I still don't see why you are having problems with the mounts. The Finns are putting down well over 400hp without problems.

KarTek · #34 09-17-2008, 08:00 AM

Quote:

Originally Posted by ForcedInduction

I still don't see why you are having problems with the mounts. The Finns are putting down well over 400hp without problems.

I reckon' that's true. I'm just brainstorming - thinking of all the potential problem areas. For fun, I might put my defective one on the bandsaw and cut it in half to see what's inside.

Chad300tdt · #35 09-17-2008, 08:15 AM

Quote:

Originally Posted by KarTek

I reckon' that's true. I'm just brainstorming - thinking of all the potential problem areas. For fun, I might put my defective one on the bandsaw and cut it in half to see what's inside.

Hey ... now that sounds like fun!! Post the pics ASAP.

GREASY_BEAST · #36 09-18-2008, 04:27 PM

speaking of torque-limiting.. is your turbo gonna crunch when the engine mounts flex? It looks awefully tight in there

Cervan · #37 09-18-2008, 05:08 PM

Solid mounts ftw.

KarTek · #38 09-18-2008, 08:33 PM

Quote:

Originally Posted by GREASY_BEAST

speaking of torque-limiting.. is your turbo gonna crunch when the engine mounts flex? It looks awefully tight in there

Where it's mounted, the torque lever arm is moving more downward than to the side. I did account for a little movement to the side and I'm also tweaking the final mounting position more to the driver's side to allow a tad more clearance.

There's also a relief in the heat shielding that you can't see in the picture that gives it a little more clearance.

Quote:

Originally Posted by Cervan

Solid mounts ftw.

Holy cow, the vibration was bad enough when I had a collapsed mount on the passengers side. I can't imagine what it would be like with solid mounts!

michakaveli · #39 09-23-2008, 10:13 AM

KarTek.... I don't see any updates

KarTek · #40 09-23-2008, 01:36 PM

Nothing fun going now... I've been spending hours on the computer getting the design done for the laser/water jet cutter to do the manifold backing plate. The car is still a mess, everything disconnected because I'm using the manifold gasket as a template and taking my measurements from it.

I can post all my silly sketches and calculations but I don't want everyone seeing how many times I change my mind and scratch through my plans!

I also have the preliminary design complete for the routing of the exhaust tubing.

KarTek · #41 09-30-2008, 07:44 PM

What I'm doing tonight...

Just boring stuff...

GREASY_BEAST · #42 10-05-2008, 07:54 PM

you do all your solidworks modelling with just the trackpad????

TheDon · #43 10-05-2008, 08:00 PM

Quote:

Originally Posted by GREASY_BEAST

you do all your solidworks modelling with just the trackpad????

I did that once.. man is it painful.

trackball FTW!

KarTek · #44 10-05-2008, 09:08 PM

Yeah, I've gotten used to it... If I zoom WAY in, it's not too bad. Lukily, most all the shapes are fairly symmetrical and I create one side, copy and mirror it to make the whole piece.

Here's a couple updates that I just finished. I took everything back apart today and spent a couple more hours re-positioning the turbo into a final, more optimal position.

This is the design for the manifold flange:

If the fabricators have trouble with the oval ports, a version with a round port will work:

Here's a concept drawing for the shape of the manifold. This free-form stuff is where the akwardness of the track pad really shows.