what material for flat underbody?
10-02-2011, 09:15 AM
#1
what material for flat underbody?
i am currently working on a flat underbody and rear diffuser and am just wondering what you guys think would be the best material. it needs to be something that can cope with the heat of the exhaust which will be pretty close but will be side exit on the left hand side behind the door. i was thinking 1.5mm aluminium sheeting with NACA ducts to get some cool air to the gearbox exhaust and diff. any thought or suggestions?
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10-03-2011, 03:41 PM
#5
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Join Date: May 2010
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Has anybody done a full flat underbody in a full time racecar for any period of time? If so were there any heat issues and how were they dealt with? This is my main concern, don't really want to cook the diff or gearbox.
PS, I'm Dan's (mr2daj) business partner. We run an MX5 specialists in the UK; AK Automotive. There is very little info on this over here, in fact I think we run the only rturbo'd MX5 racecar in the UK.
PS, I'm Dan's (mr2daj) business partner. We run an MX5 specialists in the UK; AK Automotive. There is very little info on this over here, in fact I think we run the only rturbo'd MX5 racecar in the UK.
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10-03-2011, 04:41 PM
#6
Has anybody done a full flat underbody in a full time racecar for any period of time? If so were there any heat issues and how were they dealt with? This is my main concern, don't really want to cook the diff or gearbox.
PS, I'm Dan's (mr2daj) business partner. We run an MX5 specialists in the UK; AK Automotive. There is very little info on this over here, in fact I think we run the only rturbo'd MX5 racecar in the UK.
PS, I'm Dan's (mr2daj) business partner. We run an MX5 specialists in the UK; AK Automotive. There is very little info on this over here, in fact I think we run the only rturbo'd MX5 racecar in the UK.
A complete flat undertray, besides the underside of the tunnel which is a separate peace with various holes (probably several different ones during development or for different conditions).
The Miata is not much different, it's just the tunnel that needs some ventilation, how much depends...
A complete flat bottom with a fully open tunnel would be a real improvement to the stock situation.
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10-04-2011, 11:08 AM
#10
i think it well be easier and more cost effective to make custom parts. the elise is also rear engined and therefore has no exhaust heat to contend with underneath. i think we are going to go with ally just not sure on weather to use thin stuff with strengtheners or slightly thicker without. may be a little trial and error over the winter to see what works best.
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10-04-2011, 11:11 AM
#11
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Looks like aluminininium.
From this thread:
https://www.miataturbo.net/showthrea...light=diffuser
And this one has a Lotus Elise diffuser:
From this post:https://www.miataturbo.net/showpost....6&postcount=58
And this looks like plastic:
Other pics here:
https://www.miataturbo.net/showpost....7&postcount=98
I used the search button.
And there are many threads on front splitters and materials/design/attachment of them as well. Most come back to the centerline of the front wheels or further.
From this thread:
https://www.miataturbo.net/showthrea...light=diffuser
And this one has a Lotus Elise diffuser:
From this post:https://www.miataturbo.net/showpost....6&postcount=58
And this looks like plastic:
Other pics here:
https://www.miataturbo.net/showpost....7&postcount=98
I used the search button.
And there are many threads on front splitters and materials/design/attachment of them as well. Most come back to the centerline of the front wheels or further.
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10-18-2011, 08:32 AM
#15
spoke to my exhaust builder today and he reckons its a bad idea. he suggests leaving gaps along where the exhaust is otherwise the exhaust will overheat. he is no idiot either and builds a lot of exhausts for high end race cars and touring cars. i wonder though how these holes will effect how the air passes under the car and possibly negate any gains that would have been made?
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Haha
