designing and making a rear diffuser

**phatsam7** · 24-02-2011 20:56

would i be better using aluminium or steel? would this depend on the design (i.e what needed bending, welding etc)

anyone got any initial suggestions?

car is a mk4 astra hatch by the way

**ardenvxr** · 24-02-2011 21:21

aluminium over steel for weight

**Nobbie** · 25-02-2011 09:19

I'd make a mould out of steel and then make the actual item from fibre glass, GRP or carbon fibre, etc.

**Tathan** · 25-02-2011 11:21

Yeah, use grp or carbon. I've got some doodles I've been doing on Pro Engineer that I'm gonna try out soon. You doing it for looks or downforce?

**GaryB** · 25-02-2011 22:54

Originally Posted by Tathan

Yeah, use grp or carbon. I've got some doodles I've been doing on Pro Engineer that I'm gonna try out soon. You doing it for looks or downforce?

I don't suppose you've doodled something based upon the fuel tank cover of a Calibra?
I'd be interested to see if so; for downforce not looks.

**Stefan** · 28-02-2011 18:45

Originally Posted by GaryB

I don't suppose you've doodled something based upon the fuel tank cover of a Calibra?
I'd be interested to see if so; for downforce not looks.

I have some info on the ITC/DTM Calibra aero work. If your interested pm me your email address.

**phatsam7** · 03-03-2011 21:06

thanks all. sorry for the late reply.

going for looks rather than downforce to be honest. ive acquired a few sheets of steel so il make it out of that first (easier to cut/weld/generally bodge). il make any changes etc with that, and finally re-make it out of ally

made a cardboard mockup

**Tathan** · 03-03-2011 22:04

If you're doing it for aero, it's about 12 feet too short.

**ardenvxr** · 03-03-2011 22:20

Originally Posted by Tathan

If you're doing it for aero, it's about 12 feet too short.

hes said its for looks nothing else

**Tathan** · 03-03-2011 23:31

Originally Posted by GaryB

I don't suppose you've doodled something based upon the fuel tank cover of a Calibra?
I'd be interested to see if so; for downforce not looks.

Did you get stuff off Stefan? I'm gonna do some work on mine this weekend and if I can get dims off his i can have a play with Calibra shaped things

**GaryB** · 04-03-2011 06:30

Originally Posted by Stefan

I have some info on the ITC/DTM Calibra aero work. If your interested pm me your email address.

Of great interest, thanks! p.m. sent.

Originally Posted by Tathan

Did you get stuff off Stefan? I'm gonna do some work on mine this weekend and if I can get dims off his i can have a play with Calibra shaped things

Just pm'ed ^

**GaryB** · 05-03-2011 22:30

Originally Posted by Stefan

I have some info on the ITC/DTM Calibra aero work. If your interested pm me your email address.

Received, many thanks!

p.s. interesting domain name in your email address, do you have a website coming?

**Paul** · 06-03-2011 12:05

I cannot see why anyone thinks that looks good

**GaryB** · 09-05-2011 15:04

Originally Posted by Tathan

Did you get stuff off Stefan? I'm gonna do some work on mine this weekend and if I can get dims off his i can have a play with Calibra shaped things

Here you go Mr T ( or others), design me something carbonish & meaningful based on this:

Great pix courtesy of D-Man at Opel Club Latvia
( project thread here: ClubCalibra.net • View topic - Opel Calibra Last Edition Nr.0462 * now with Turbo )

**Tathan** · 09-05-2011 15:37

Ok. I've got loads on this week and next but after that I shall CFD some goodness

Unless someone beats me to it... I could do with a simple model or a dimensioned drawing of a Calibra to get the shape though if anyone's got one?

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