chris_uk
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Registered: 8th Jul 03
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making a front splitter for the track/hillclimb designing it .. not a problem.. coming to attach it to the car, need ideas.
i have one which is just to attach an L bracket onto the current splitter and then bolt the splitter up to the angle bracket.
can anyone think of any other ideas that might save the carbon splitter from any form of holes etc?
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Corsa_Spragg
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Registered: 6th Jul 08
Location: Kidderminster, Hereford and Worcester
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wouldn't be a bad idea, taking a picture of the bottom of the bumper to see what we're working with, could use self taping screws and/or tigerseal?
design looks great though, what material are you making it out of?
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thegsi
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Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
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I think you have the best idea. Other than that, try simply tech screwing it directly in? but I dont know what its like for fixing underneath. 4-6 small ally L brackets would be spot on maybe with a small bead of silicone to minimise flapping at high speeds?
Nice to see you're planning it out properly too.
[Edited on 07-05-2011 by thegsi]
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RCoughtrie
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Registered: 31st Oct 04
Location: East Ayrshire Scotland
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Cant you design it with the shape of the carbon slitter integrated and use the holes that attatch it atm... or is it bonded on ?
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chris_uk
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Registered: 8th Jul 03
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its flat up against the clam underneath with just the lip you see sticking down.
im making it from 1/4" ply (usual material) and i could mould it to use the existing fastening points as the splitter does..
thats an option i could look at but i want to try if possible to keep a truley flat under pan.
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chris_uk
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Registered: 8th Jul 03
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ill take a pic of the underneath
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chris_uk
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Corsa_Spragg
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Registered: 6th Jul 08
Location: Kidderminster, Hereford and Worcester
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i'd screw them on, one by the screw already there (although there would be a gap, however you wouldn't be able to see it, and it would sit tight) and also closer to the underneath of the car to ensure it sits right, and it tight. then do that 4-6 times around the splitter maybe?
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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rivnuts 
And tie rods at the front to stabilize it and alter angle of attack if needed.
Road or Track - go for 1 option, saves on hassle big time.
We have both of ours protruding about 120-150mm
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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[quote="AK"]New splitter on the Impreza (eventually got round to replacing the initial wooden test one )
Its about 500mm deaper and extends all the way back to the cusco H brace (rear of the gearbox crossmember)
Sits lower than wood one, is lighter and not angled quite as much
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Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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you will need some sort of adjustment on it, are you going for what AK has shown above? as it wont make any difference could even hinder if its the wrong angle
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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[quote="AK"]i'll be home on sun eve Dez
pics from today.
Fuel sampling done, brakes done, bodywork done, serviced.....
work on CF splitter
still missing a lot of sponsorship stickers etc
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chris_uk
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Registered: 8th Jul 03
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I like the idea of been able to adjust the angle of the splitter.
Rivnuts are an option but they might be just too strong in case I come off, I want something that will put up with the wind speeds of 150mph+ without the splitter tearing off but also want it to be weak enough to break if I do come off without ripping the clam to pieces.
What about attaching the splitter to the splitter? as I don't want to create a gap between the splitters for the air to start separating them if you get what I mean. Unless I just attach a couple of them along the back side of the original splitter and do the bolts up tight forcing the splitter to butt up to the original one and then maybe just run some black gaffa tape along the gap.. Maybe that would work well enough.
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
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I'm not convinced that altering the angle will make any difference. AFAIK the idea of a splitter is to tap into the stagnation point that is created at the front of a bluff body (e.g bumper). This area has very low flow speeds (hence ''stagnation'') and consequently high pressure. By placing a splitter at the base of the bumper, this high pressure has a surface to act on. So extension of the surface will increase the area and downforce, but angle will have negligible effect.
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chris_uk
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Registered: 8th Jul 03
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Is that right? It's something I don't know a great deal about so I will have to research it. Angles and optimum lengths etc
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
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quote:
Originally posted by chris_uk
Is that right? It's something I don't know a great deal about so I will have to research it. Angles and optimum lengths etc
AFAIK yes. The canard things on the side of the front bumper are often adjustable for angle of attack, but they generate minimal downforce themselves and it is more about the flow that they create along the sides of the vehicle. With a splitter, extension will increase downforce up to a point where you are actually too far ahead of the stagnation point and the pressure decreases towards ambient. If you look at F1 cars, they utilise splitters ahead of radiator inlets etc due to the fact that these areas will be of high pressure.
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
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Here you go, make yourself a cuppa and have a read
http://f1-dictionary.110mb.com/splitter.html
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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ok, not so much angle of attack but having it angled 'up' will generate lift. Angled downwill drag.
I'd say flat as a pancake it the target for the leading edge
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
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quote:
Originally posted by AK
ok, not so much angle of attack but having it angled 'up' will generate lift. Angled downwill drag.
I'd say flat as a pancake it the target for the leading edge
Angled up won't necessarily create lift. The pressure difference will still be in favour of downforce, plus if he has a flat floor, encouraging underbody flow may actually provide some gains in downforce. Its witchcraft this aero lark.
I'd agree that keeping it flat is the best way to go though 
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gez bay
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Registered: 14th Feb 08
Location: South Wales drives: Vxr
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escort cosworth front splitter design is worth looking into. its got adjustments for different settings, for an extended splitter.
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dhdev
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Registered: 22nd Dec 05
Location: Midlands
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This is what I was getting at with the angle up business, as you can see the lower portion is curved up to promote air going underneath the body.
and slightly here too
[Edited on 07-05-2011 by dhdev]
And also a little bit off topic (may give mounting ideas at a stretch  ) but how funkin cool are DTM cars
[Edited on 07-05-2011 by dhdev]
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chris_uk
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Registered: 8th Jul 03
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thanks for that link!
adam, your taking your scooby to knockhill arnt you? ill have a look at yours then if there us a spare second at lunch time.
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AK
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Registered: 5th Jul 00
Location: Aberdeen City
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aye... the Impreza is very much a WIP
Its secured with simple bolts and large washers to spread the loads. It simply secured with cable ties at the rear to stop any flapping
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lee303
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Registered: 1st Jul 08
Location: under the nova usually
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hat DTM cr is amazing, had moveable aero and roll bar adjustment that was mapped to track position accurate to like 2mm and also had a v band clamp to attach the gearbox to the bell housing 
but back on topic, personally i cant see the rivets being to strong in the clam, but you could use low-ish tensile bolts so they would shear if you have an off but be strong enough to stop it flying off
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FAZ
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Registered: 24th Nov 07
Location: Coventry
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DTM car frontend looks mentally awesme
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