Hey,

OK. I am doing a swap with the front end of my '72 914. Can I use the existing crossbrace inbetween the 911 a-arms?

Chris

yes

Thanks Aaron...how many wheels are you selling in the 15 inch size?

Chris

QUOTE (ChicagoChris @ Nov 22 2005, 09:29 PM)

Thanks Aaron...how many wheels are you selling in the 15 inch size? Chris

2 7" and 2 8" fuchs will be available shortly.

a set of 7"s popped up on 911bbs on pelican for 135 shipped. smokin deal

QUOTE (Aaron Cox @ Nov 22 2005, 09:25 PM)

yes

914 cross member works just fine.
in fact, if your 911 suspension has the aluminum cross-member i highly recommend using the 914 steel one instead ...

Andy

QUOTE (SirAndy @ Nov 22 2005, 08:39 PM)

if your 911 suspension has the aluminum cross-member i highly recommend using the 914 steel one instead ... Andy

How come?

QUOTE (Headrage @ Nov 23 2005, 06:07 AM)

QUOTE (SirAndy @ Nov 22 2005, 08:39 PM) if your 911 suspension has the aluminum cross-member i highly recommend using the 914 steel one instead ...  Andy How come?

Urban Myth

QUOTE (Headrage @ Nov 23 2005, 06:07 AM)

QUOTE (SirAndy @ Nov 22 2005, 08:39 PM) if your 911 suspension has the aluminum cross-member i highly recommend using the 914 steel one instead ...  Andy How come?

I just did mine and kept the original cross member.
From what I understand the aluminum ones can flex more than steel.
I think twisting could occur also.
I also found cracks in the aluminum one and
the weight difference wasn't enough for me to care.

I am also a big fan of Urban Myth

lets not start a fight right before the holidays...

somebody sell me an aluminum one they aren't going to use.

brant

No fighting
How about imperical evidence?
Under what conditions does the "FLEXING" occur?
10/10th road coarse action with 8" slicks"

I seriously doubt any daily driver will recognize any problem
since porsche engineers saw fit to equip thier flagship model line w/this piece of suspension HW back in the day.
Your probably safe applying it to your 914.

QUOTE (rdauenhauer @ Nov 23 2005, 09:50 AM)

Under what conditions does the "FLEXING" occur?

like me in the car, up on the lift, at HPH, bleeding the brakes, brad asking me to turn the front wheels to the other side (of course wheels were off) and him yelling:

WTF?

you could see the aluminium cross member flex (twist), right then and there, no load on it whatsoever ...

that's why i went back to the steel cross member.
maybe i got a bad one, maybe not. i wasn't going to take any chances.
just a few ounces of weightsavings at a point where weight has the least impact (close to the ground) ...

i'd rather be on the save side on this one.

but hey, i'm sure you got *PLENTY* of "imperical evidence" to prove me and brad wrong!
right?
Andy

Minor Hijack

This cross brace is at the back of the A-arms, correct?
Is there any advantages to installing bracing between the front mounting points?

QUOTE (Rough_Rider @ Nov 23 2005, 10:25 AM)

Minor Hijack This cross brace is at the back of the A-arms, correct? Is there any advantages to installing bracing between the front mounting points?

thats a solid mount on the tub. id see no reason

QUOTE (Rough_Rider @ Nov 23 2005, 10:25 AM)

Is there any advantages to installing bracing between the front mounting points?

you've already got bracing between those. open your front trunk and look at the trunk floor. you'll see the bracing right there ...

Andy

QUOTE (Aaron Cox @ Nov 23 2005, 10:26 AM)

QUOTE (Rough_Rider @ Nov 23 2005, 10:25 AM) Minor Hijack  :hijacked: This cross brace is at the back of the A-arms, correct? Is there any advantages to installing bracing between the front mounting points? thats a solid mount on the tub. id see no reason

Unless the tub is cut away in some manner that might weaken the points...

ie: fuel cell, oil cooler, or what not.

QUOTE (brant @ Nov 23 2005, 10:31 AM)

QUOTE (Aaron Cox @ Nov 23 2005, 10:26 AM) QUOTE (Rough_Rider @ Nov 23 2005, 10:25 AM) Minor Hijack  :hijacked: This cross brace is at the back of the A-arms, correct? Is there any advantages to installing bracing between the front mounting points? thats a solid mount on the tub. id see no reason Unless the tub is cut away in some manner that might weaken the points... ie: fuel cell, oil cooler, or what not.

good point. usually oelcooler exits are firther back in the trunk no?... not on the raised brace area?

true...

but when we cut out a huge hole for the cell (in both the floor and in the firewall) it was amazing how much the remaining floor flexed....

thus:

Yep, like Brant said. PO stuck a fuel cell in there & cut out the floor. Grrrrrr.

QUOTE (Rough_Rider @ Nov 23 2005, 10:37 AM)

Minor Hijack This cross brace is at the back of the A-arms, correct? Is there any advantages to installing bracing between the front mounting points?

uh you posted that, its answered and the you pot again LOL

look above your post for a supplimental brace

QUOTE (Aaron Cox @ Nov 23 2005, 10:39 AM)

uh you posted that, its answered and the you post again LOL

Trev,

I'd try to assess how much (if any) flex your getting on the front mounting points. We didn't want to add a brace for weight purposes, but had cut out so much of the firewall (at the back of the cell) that we perceived some actual flex......

It really may not be a functional bar according to many.
but we used a very light material to lessen the impact of adding 1 more bar.

brant

QUOTE (SirAndy @ Nov 23 2005, 09:18 AM)

QUOTE (rdauenhauer @ Nov 23 2005, 09:50 AM) Under what conditions does the "FLEXING" occur? like me in the car, up on the lift, at HPH, bleeding the brakes, brad asking me to turn the front wheels to the other side (of course wheels were off) and him yelling: WTF? you could see the aluminium cross member flex (twist), right then and there, no load on it whatsoever ... that's why i went back to the steel cross member. maybe i got a bad one, maybe not. i wasn't going to take any chances. just a few ounces of weightsavings at a point where weight has the least impact (close to the ground) ... i'd rather be on the save side on this one. but hey, i'm sure you got *PLENTY* of "imperical evidence" to prove me and brad wrong! right? Andy

So the suspension was at full droop when you witnessed this? Any idea if this still occurs with the wheels on the ground?

Though it seems unlikely to me that the crossmember from a heavier and more powerful car would do this, I bow to experience. That said, perhaps the 914 crossmember is a structural part to the unibody where as the 911 unit is not. Maybe there's more there than meets the eye?

I have both, but am considering the steel version only because it has provision to bolt on the protective pan.

Andys

QUOTE (andys @ Nov 23 2005, 11:44 AM)

Maybe there's more there than meets the eye?

yes, full drop, no wheels attached. turned the steering-wheel until i hit the stop and when i applied some more force to the steering wheel at the stop, the aluminum cross member was (very obvious, visually) twisting ...

now i don't know if it's supposed to do that or if i had a bad one (inspected it later, no cracks, looked good) but it was enough for me to go back to the stock steel crosssmember ...

that's all. just good 'ole observation ...
Andy

They flex in a 914. You can argue all you want. I have seen people install them in their 914's and not make any brackets for the back bolt holes (support) Not good.


B

Cheers Brant,

The PO cut the entire floor pan out, gone nothing left. Then pop rivited a stainless or aluminium sheet which the cell is bolted too.

his next solution was to get a 1/4" thick metal stock & bolted it too what appear to be oem a arm cover plates. Whole thing weighs 7lbs.

I'm stripping the trunk now to fix up all the rust & re-weld, just wanted to see what i'd need to put back