Anyone tried RS Barn Chasis Brace?
08-23-2010, 05:12 PM
#16
Rainman
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a simple crossbar would be easy to make, the bmw setup could probably be done with some creative tubing to the engine crossmember...
it'd make more sense to measure that distance with the car on the ground vs jacked up, right?
it'd make more sense to measure that distance with the car on the ground vs jacked up, right?
08-23-2010, 09:14 PM
#17
Rennlist Member
I'd be concerned with the clearance issue when used on a car with a larger exhaust?
08-23-2010, 09:21 PM
#18
Race Car
I think the full piece shown in Scott's post is a factory part for the convertible 3's.
Unit bodies may be similar with protruding shock towers (from the firewall) and bumper horn mounts but the chassis, side to side deflection has to be worse on the 3-series from what I can see.
I have a couple of each of the cars (318 TI and 944/T) and in my opinion, it's the rigidity of the aluminum engine cross member that sets the Porsche apart.
It's no secret that the 3's a-arms, especially at the rear mount leave a lot to be desired..... and why anyone would decide to further brace this design against flex instead of addressing the flimsy rear a-arm mount is beyond me.
The load of holding camber on a 944 is not fully dependent on the rear caster mount but split by the semi-rigid hinge point at the already stiff engine cross member. Actually, this point probably carries a disproportionate amount of the load because it is more inline with the spindle center line.
I run 255 cross section race tires on 17X9.5 wheels on the front on very bumpy tracks and have never even seen slight bolt deformation when doing periodic maintenance which should be evident if the caster block was moving.
T
Unit bodies may be similar with protruding shock towers (from the firewall) and bumper horn mounts but the chassis, side to side deflection has to be worse on the 3-series from what I can see.
I have a couple of each of the cars (318 TI and 944/T) and in my opinion, it's the rigidity of the aluminum engine cross member that sets the Porsche apart.
It's no secret that the 3's a-arms, especially at the rear mount leave a lot to be desired..... and why anyone would decide to further brace this design against flex instead of addressing the flimsy rear a-arm mount is beyond me.
The load of holding camber on a 944 is not fully dependent on the rear caster mount but split by the semi-rigid hinge point at the already stiff engine cross member. Actually, this point probably carries a disproportionate amount of the load because it is more inline with the spindle center line.
I run 255 cross section race tires on 17X9.5 wheels on the front on very bumpy tracks and have never even seen slight bolt deformation when doing periodic maintenance which should be evident if the caster block was moving.
T
08-23-2010, 09:26 PM
#19
Rennlist Member
12-19-2014, 01:09 PM
#20
Rainman
Rennlist Member
Rennlist Member
the 944's alu x-member is probably stiffer than that steel piece on the 'roo but the 'roos x-member (holding the steering rack) is welded to the chassis IIRC instead of bolted like the 944...but the alu xmember has slotted/oversize bolt holes which may allow for "some" movement (hopefully not because those bolts are torqued tight!)
12-19-2014, 01:40 PM
#21
Drifting
The engine cross member means a lower brace is just a piece of bling on a road car in my opinion.
12-19-2014, 08:13 PM
#23
Three Wheelin'
12-24-2014, 12:17 AM
#25
Racer
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I made some years ago that look like the ones that Lindsey sells , clears the exhaust just fine and so far have not scraped it on anything.Can tell a difference on track and street.
have my home made one on 3 cars .
thinking about doing away with the heim joint and bolting a solid bar in its place .
Clifton
12-26-2014, 01:31 AM
#26
Race Car
I made some years ago that look like the ones that Lindsey sells , clears the exhaust just fine and so far have not scraped it on anything.
Can tell a difference on track and street.
have my home made one on 3 cars .
thinking about doing away with the heim joint and bolting a solid bar in its place .
Clifton
Can tell a difference on track and street.
have my home made one on 3 cars .
thinking about doing away with the heim joint and bolting a solid bar in its place .
Clifton
One of my post is quoted several messages up from 4+ years ago.....!
Clifton, how's your son's car coming...?
Retubbing Eon's car (with improvements) from the Hallet incident....right on schedule for Sebring.
T
12-28-2014, 11:39 AM
#27
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Wow, this thread is old...!
One of my post is quoted several messages up from 4+ years ago.....!
Clifton, how's your son's car coming...?
Retubbing Eon's car (with improvements) from the Hallet incident....right on schedule for Sebring.
Glad to hear your making progress on Eon's car ! He needs to keep going he has great talent .
Josh's car moving slow . to many projects at one time . We are however collecting parts decided to use a different tub , changing to a late car now .
One of my post is quoted several messages up from 4+ years ago.....!
Clifton, how's your son's car coming...?
Retubbing Eon's car (with improvements) from the Hallet incident....right on schedule for Sebring.
Glad to hear your making progress on Eon's car ! He needs to keep going he has great talent .
Josh's car moving slow . to many projects at one time . We are however collecting parts decided to use a different tub , changing to a late car now .
12-28-2014, 10:26 PM
#28
Rennlist Member
12-28-2014, 11:26 PM
#29
Race Car
SO..., I think he's heading on down to the guy I use for machine work tomorrow to drop a block for honing..., said something about visiting Dave and dropping off a race seat that he wanted.
Want to do another car for SP3 right after we finish this one, either 944T or a 944S @ 2500lbs w/driver since they opened the rules on camshafts and allowed the S2 intake.
Let me know if y'all need anything.
I can build a fast car....
I have an Autopower bolt in cage, brand new, all drilled and assembled with the parts all letter indexed for reassembly, painted Alpine White.
I own a tubing bender with 1.5" dies you can borrow too if y'all want to build your own custom cage, complete with bending and notching software.
T
12-28-2014, 11:31 PM
#30
Race Car
You have to use spacers (the thick washers like on the actual caster block mounting bolts work) to mount the end brackets because of the hump in the caster block.
You'll notice the RS Barn version has this space cut out for this reason.
T