Rear tranny/engine mount, I've been cutting again Options

[J P Stein]

I like the one in Chris' pic. It gets rid of the oddball 914 shocks....when you've gone that far, why keep the towers..., strong ( to a boilermakers eye) and elegant in it's simplicity....but WTF do I know (IMG:style_emoticons/default/confused24.gif)

[URY914]

J P, I thought about cutting out the shock mounts but tieing back into the frame rails would be a bitch of a connection to fabricate.

What I'm trying to acheive is:
1. Larger bars with smaller diagonals.
2. All bars begin and end at a connection of other bars or back to the car tub.
3. Bars can't "dead-end" into the middle of another bar.


When I'm done the rear shock tower will have four tubes tied to it. The front has three bars tied to it.

Keep the comments coming..

Paul (IMG:style_emoticons/default/welder.gif)

[machina]

Keep the comments coming

this rig looks good (IMG:style_emoticons/default/smash.gif)

[URY914]

This pic shows better on what I'm planning. I just spent 1 hour fitting one tube in. Some fun.

The bars over the engine clear the filter just enough.

[URY914]

The bars over the engine will be 1".

[URY914]

Here is the connection at the shock tower to the bar running to the main hoop.

[machina]

The bars over the engine clear the filter just enough.

You probably thought of it already,but...

Make sure you have clearance for movement of the motor from torque. Even with rigid mount, mine move a little. Also, gotta be able to service, tune, etc the carbs.

And what's the deal with your firewall? Are you going to cut it more or leave it like that?

[Brad Roberts]

I *really* like what you did with this last pic in front of the shock tower.

As far as the rear tranny mounts.... most of the 914 owners here with 3.0+ engines would SHIT a brick if they knew that their stock tranny mounts where held on with ears that are spot welded in 4-5 places. You dont need a TON of bracing in the rear for the tranny.

In my tube frame car shot... 90% of what you are seeing is CRASH protection Not tranny mount.


B

[URY914]

And what's the deal with your firewall? Are you going to cut it more or leave it like that?

I want to be able to reach around and adjust the fuel pressure and timing while I drive. (IMG:style_emoticons/default/rolleyes.gif)

OK maybe not, I'll replace it with a piece of sheetmetal (or cardboard (IMG:style_emoticons/default/biggrin.gif) )

I'll have about 3/4" over the a/c top.

Paul

[URY914]

I *really* like what you did with this last pic in front of the shock tower.

B

It was a PITA fitting that bar in front of the tower but it should be a lot stronger.

[machina]

I want to be able to reach around and adjust the fuel pressure and timing while I drive

Vic Elford (i think) told about how he had to work the throttle on his 917 (i think again) directly when the cable broke during a race.

See, you and Vic have alot in common. (IMG:style_emoticons/default/bs.gif)

[URY914]

As far as the rear tranny mounts.... most of the 914 owners here with 3.0+ engines would SHIT a brick if they knew that their stock tranny mounts where held on with ears that are spot welded in 4-5 places. You dont need a TON of bracing in the rear for the tranny.

B

Thank you, I thought that was the case.

Paul

[URY914]

In my tube frame car shot... 90% of what you are seeing is CRASH protection Not tranny mount.


B

I thought that was your car so I didn't say anything. (IMG:style_emoticons/default/biggrin.gif)

The only place I need crash protection is in the front when I hit those damn cones.

Paul

[URY914]

See, you and Vic have alot in common. (IMG:style_emoticons/default/bs.gif)

Careful there, I think Vic lives in South Florida. Down in the Grove if I remember right.

I've heard that story too.

Paul

[Jeroen]

The brace your adding in this pic... is that going up to the pass.side of the main hoop or is it going across the engine to the center of the firewall / mainhoop x-brace ?

(IMG:http://www.914world.com/bbs2/uploads/post-2-1101589849.jpg)

[URY914]

Pass. side of main hoop.

P

[ChrisFoley]

You should get rid of the Weltmeister tranny mounts and bolt the ear up directly to a metal plate.
I would prefer to see your bottom braces go forward to the underside of the longitudinal instead of to the inner suspension ear. IMO, the trailing arm pickups shouldn't be used to support the mass of the car.
Normally the only major loads the inner console sees are in a forward direction, during cornering (draw an arrow from where the rubber meets the road to the hole in the inner console). Any rearward forces are somewhat less since they only occur to the unloaded, inside wheel.

[URY914]

You should get rid of the Weltmeister tranny mounts and bolt the ear up directly to a metal plate.

I'll do that. I was undecided on bolting the tranny right up to the mounting plate. But if you think its OK I'll do it. It will be cleaner.

Thanks

Paul

[URY914]

I would prefer to see your bottom braces go forward to the underside of the longitudinal instead of to the inner suspension ear. IMO, the trailing arm pickups shouldn't be used to support the mass of the car.
Normally the only major loads the inner console sees are in a forward direction, during cornering (draw an arrow from where the rubber meets the road to the hole in the inner console). Any rearward forces are somewhat less since they only occur to the unloaded, inside wheel.

Let me look to see where I can tie it in under the frame rail. One of the reasons I was tieing to the ear was that it was an easy connection. I could pull the location of the tie in point up to the inside of the frame rail if that is better.

Thanks again,
Paul

[URY914]

I fitted the tranny support bars in this afternoon. Also cut away some more sheetmetal to get better access. Have a look...