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Main : Members : PIGDOG CA18 crossmember

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CA18 crossmember
CA18 crossmemberPopular
SubmitterPIGDOGMore Photos from PIGDOG   Last Update2008/10/13 6:40    Tell a friendTell a friend
Hits1891  Comments11    0.00 (0 votes)0.00 (0 votes)
another angle

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The comments are owned by the poster. We aren't responsible for their content.

Poster Thread
1200rallycar
Posted: 2008/10/13 7:29  Updated: 2008/10/13 7:29
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
what are you using this for...

any chance one will be for sale??

Poster Thread
PIGDOG
Posted: 2008/10/13 7:47  Updated: 2008/10/13 7:47
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: CA18 crossmember
its currently an out of work paper weight

going to throw together a CA18DE+t over the holidays to put in my car for when i feel like being stealth and not having induction noise

surely you can handle an angle grinder, dont take that long to make....unless your trying to make it sit stupidly low like i did

Poster Thread
1200rallycar
Posted: 2008/10/13 7:53  Updated: 2008/10/13 7:53
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
yeah not really about the angle grinder

if i had a drawing i would be set, i just know that things like this take a whole weekend to make when you are trying to drop the motor in and out and measure and all that

i guess i'll stick with the maddat idea

i'm looking for a quick conversion this time... having bits like this ready to go before the a-series even comes out is gonna save ages

Poster Thread
1200rallycar
Posted: 2008/10/13 7:58  Updated: 2008/10/13 7:58
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
i spoke to an engineer about dropping the centre of the crossmember like that and he was happy to have it done but he wanted 3mm steel plate spot welded on each side across the length of the "dipped' section and the ends of those plate to be round.

Poster Thread
PIGDOG
Posted: 2008/10/13 8:09  Updated: 2008/10/13 8:09
No life (a.k.a. DattoMaster)
Joined: 2004/10/28
From: Geelong, Vic
Posts: 6184
 Re: CA18 crossmember
spot welded plates hey....might as well just get them fully welded on

which ends need to be round?

took me about a half hour to make the mounts once i figured out how to get the engine low enough, just make cardboard templated and then transfer then to steel plate and trim to fit

Poster Thread
1200rallycar
Posted: 2008/10/13 8:23  Updated: 2008/10/13 8:23
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
would take half hour to get two coats of paint on...

seam welded tend to allow some flex/vibration etc. fully welded is too rigid and ends up with cracking of the welds. that goes for welding in general of beams etc which you would expect bending loads

hard to explain round ends.. but basically on the two ends rather than cut the ends of square have round (convex) cut offs, this removes any concentrated stress at the corners where it is welded to the crossmember i guess though i dont fully see why that's necessary

Poster Thread
Daveman
Posted: 2008/10/13 9:26  Updated: 2008/10/13 9:26
Home away from home
Joined: 2003/5/19
From: Melbourne
Posts: 785
 Re: CA18 crossmember
In this case I highly doubt that seam welding will be more effective than continuous welds. A car chassis perhaps is more effectively seam welded because they get noticeable amounts of twist and distortion on a regular basis.

I actually did an analysis on a standard crossmember in cosmos and the amount of deflection from extreme load situations was still a bees dick/

Poster Thread
1200rallycar
Posted: 2008/10/13 9:29  Updated: 2008/10/13 9:29
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
the best reason to do it...

cause the engineer wants it done that way

Poster Thread
Daveman
Posted: 2008/10/13 9:30  Updated: 2008/10/13 9:30
Home away from home
Joined: 2003/5/19
From: Melbourne
Posts: 785
 Re: CA18 crossmember
can't argue with that

Although aren't you an engineer too? Does he listen to your opinion?

Poster Thread
1200rallycar
Posted: 2008/10/13 10:00  Updated: 2008/10/13 10:00
No life (a.k.a. DattoMaster)
Joined: 2002/3/20
From: Melbourne, Australia
Posts: 8221
 Re: CA18 crossmember
i choose not to argue for my own benefit, he was a fair bit older and last thing he is gonna want to engineer is some young smart arses car