carbon fiber weight saving
Moderators: hot66, impmad2000, Barry, Viv_Surby, Derek, Mike Usiskin
carbon fiber weight saving
A whole 50g!
Pointless, I know.
Just need some tea strainers to finish them off.
Pointless, I know.
Just need some tea strainers to finish them off.
Matt
'69 RHD 912/6
'72 LHD 911T
'69 RHD 912/6
'72 LHD 911T
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Re: carbon fiber weight saving
pointless ? Never !
I like !
I like !
Tim Bennett
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
RHD Targa 2.2T EFI, Triumph ITB's, EDIS and Megasquirt.
"Old enough to know what's right and young enough not to choose it"
#1153
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Re: carbon fiber weight saving
did you mould those yourself or have you brought them?
im in the process of making some CF parts for my track car, so any tips and hints appreciated so far have made a front door card which came out ok, and am starting making a mould for the rear this week
im in the process of making some CF parts for my track car, so any tips and hints appreciated so far have made a front door card which came out ok, and am starting making a mould for the rear this week
Re: carbon fiber weight saving
and you will be taking lots of pictures / posting a "how-to"?
please
I've seen an example of making inlet trumpets. Involved using silicon foam to fill a metal trumpet, removing the plug and wrapping in CF sock and finally covering with a condom to press against the foam plug. Worked quite well.
please
I've seen an example of making inlet trumpets. Involved using silicon foam to fill a metal trumpet, removing the plug and wrapping in CF sock and finally covering with a condom to press against the foam plug. Worked quite well.
Re: carbon fiber weight saving
Ok, since you asked so nicely,
HOW TO.....
I used an aluminium mould for the venturi - the part is only as good as the mould, so put all your effort in here. The carbon is prepreg, which already has the resin in it, far less messy than wet layup. Trial and error is used to work out the best template to cut your carbon to.
The mould is treated with a virtually invisible semi permanent release agent, which maintains the polished surface. Next the carbon is applied to the mould by hand, with the resin already in the fiber the carbon is pliable and should be worked into the mould surface as tightly as possible.
Next, 'bagging', the layup is wrapped in a plastic release film, followed by a breathable nylon layer then some heavyweight breather fabric to give a layer for the air to escape when applying the vacuum. The whole lot is then placed in a vac bag with a nozzle attached to connect to your vacuum pump.
All the air is then sucked from the bag to press the carbon tight to the mould, using a vacuum pump.
Then bake at 120deg for about an hour to activate the resin.
With the baking done, the carbon releases easily from the mould - assuming you've applied the release agent correctly.
Make 5 more
Trimmed on a disk sander, then some bases were machined in aluminium.
The bases were then bonded to the horns using a high temp epoxy.
Bolt them to your carbs, and look at them for a while. Note: don't tell your wife that it took you nearly a week to make them, she won't understand.
Matt
HOW TO.....
I used an aluminium mould for the venturi - the part is only as good as the mould, so put all your effort in here. The carbon is prepreg, which already has the resin in it, far less messy than wet layup. Trial and error is used to work out the best template to cut your carbon to.
The mould is treated with a virtually invisible semi permanent release agent, which maintains the polished surface. Next the carbon is applied to the mould by hand, with the resin already in the fiber the carbon is pliable and should be worked into the mould surface as tightly as possible.
Next, 'bagging', the layup is wrapped in a plastic release film, followed by a breathable nylon layer then some heavyweight breather fabric to give a layer for the air to escape when applying the vacuum. The whole lot is then placed in a vac bag with a nozzle attached to connect to your vacuum pump.
All the air is then sucked from the bag to press the carbon tight to the mould, using a vacuum pump.
Then bake at 120deg for about an hour to activate the resin.
With the baking done, the carbon releases easily from the mould - assuming you've applied the release agent correctly.
Make 5 more
Trimmed on a disk sander, then some bases were machined in aluminium.
The bases were then bonded to the horns using a high temp epoxy.
Bolt them to your carbs, and look at them for a while. Note: don't tell your wife that it took you nearly a week to make them, she won't understand.
Matt
Matt
'69 RHD 912/6
'72 LHD 911T
'69 RHD 912/6
'72 LHD 911T
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Re: carbon fiber weight saving
thanks for the reply, very informative! i'm going to be following a similar process except for the oven bit because i don't have one big enough.. ..plus most of my stuff is going to be non-structural cover panels and things
very neat job, and the surface finish on the inside of the trumpets is awesome from using that mould
very neat job, and the surface finish on the inside of the trumpets is awesome from using that mould
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Re: carbon fiber weight saving
Lovely work
There is a bit more than 50g waiting if you make the air cleaner base plates from carbon as well!
There is a bit more than 50g waiting if you make the air cleaner base plates from carbon as well!
Re: carbon fiber weight saving
if you were to make some carbon fibre stacks for slide throttle or high butterfly type applications ...ie like you have done but taller, I reckon you'd have q a few takers
carbon versions of these:
carbon versions of these:
Megane R26R
Discovery Sport
Defender 110
BMW R9T
Trek Superfly
but sadly no Porsches any more
Discovery Sport
Defender 110
BMW R9T
Trek Superfly
but sadly no Porsches any more
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Re: carbon fiber weight saving
interesting stuff, thanks for sharing.
cheers, Mike.
previously..
1994 968 Club Sport Riviera Blue
1994 993 C2 Carrera Riviera Blue
1972 911S to Martini RSR Prototype Spec
1973 911E to RS Lightweight Specification
1981 924 Carrera GT ex Mexborough car
3.2 Carrera Sport x2
previously..
1994 968 Club Sport Riviera Blue
1994 993 C2 Carrera Riviera Blue
1972 911S to Martini RSR Prototype Spec
1973 911E to RS Lightweight Specification
1981 924 Carrera GT ex Mexborough car
3.2 Carrera Sport x2
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Re: carbon fiber weight saving
pure automotive porn, lovely.
'53 356 Pre-A (a box of bits!)
'54 Okrasa/Porsche/VW special
'58 356A Super (GS-spec)
'65 Razoredge Ghia
'66 Westfalia Camper
'70 911S (2.3 ST Le-Mans spec engine)
http://www.pushrod.org
http://www.classicporschemag.co.uk
'54 Okrasa/Porsche/VW special
'58 356A Super (GS-spec)
'65 Razoredge Ghia
'66 Westfalia Camper
'70 911S (2.3 ST Le-Mans spec engine)
http://www.pushrod.org
http://www.classicporschemag.co.uk
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Re: carbon fiber weight saving
Excellent, good effort
Just a thought on the next set why don't you laminate in the bolt flange, it would save a few more grams, money, time and give a more accurate fit.
Looks like you already have a threaded hole in the end of the mould to bolt on a return plate, also stick some drill bushes in and you can drill off the bolt holes before demoulding.
Just a thought on the next set why don't you laminate in the bolt flange, it would save a few more grams, money, time and give a more accurate fit.
Looks like you already have a threaded hole in the end of the mould to bolt on a return plate, also stick some drill bushes in and you can drill off the bolt holes before demoulding.
1989 Porsche 930
1969 Porsche 912
1990 Porsche 964 C2
1969 Porsche 912
1990 Porsche 964 C2
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Re: carbon fiber weight saving
Are the gear knobs for sale?
Cheers
Andrew
Cheers
Andrew
Re: carbon fiber weight saving
Captain Ahab,Just a thought on the next set why don't you laminate in the bolt flange
Quite right, next time I'll combine the flange. This was just a practice run.
Squiredan,if you were to make some carbon fibre stacks for slide throttle or high butterfly type applications ...ie like you have done but taller, I reckon you'd have q a few takers
Yes, but those (GRP?) ones look more period. Happy to give it a go though - do you have any dimensions?
Andrew, you have PM
Thanks for the great comments!
Matt
'69 RHD 912/6
'72 LHD 911T
'69 RHD 912/6
'72 LHD 911T
Re: carbon fiber weight saving
Matt,have a spare set of high butterfly trumpets. let me know exactly the dimensions you need,and I'll forward them to you.Can also send some photo's,if it helps.if you were to make some carbon fibre stacks for slide throttle or high butterfly type applications ...ie like you have done but taller, I reckon you'd have q a few takers
Regards,
Regards,
Dougie
Worry is the interest on inevitability !
Dougie
Worry is the interest on inevitability !