pkw2704 Posted March 29, 2022 Share Posted March 29, 2022 ok so toying with getting one on my car ,any pics of race and street versions welcome.How the they fasten on ? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 29, 2022 Member Share Posted March 29, 2022 Behind the occupant's head or under the Seven''s tail?ThanksJonathan Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted March 29, 2022 Share Posted March 29, 2022 Like this sort of diffuser? https://www.reverie.ltd.uk/caterham-7-non-sv-carbon-fibre-rear-diffuser-for-de-dion-axle/R01SB0121I can't conceive that they will positively affect aerodynamic performance as there is no controlled flow under the car to begin with, just slow the car a bit due to the extra weight, offset by the significantly lighter wallet if you pay cash Link to comment Share on other sites More sharing options...
Tazio Posted March 30, 2022 Share Posted March 30, 2022 Each to their own, but please don't do it....... Link to comment Share on other sites More sharing options...
Croc Posted March 30, 2022 Share Posted March 30, 2022 I would echo Tazio and say don't do it. I had the Reverie version on my car. I found out after I purchased I was going to be the first to install one of their diffusers on a Caterham. Reverie had not ever test fitted it to a car - they just made it for what they thought would work. Had to fabricate brackets. Had to cut out pieces and insert some reinforcement panels in aluminium to allow suspension deflection (I have a CSR which made it more challenging). Real pain. But I made it work as the photos below from 12 years ago show. For road driving you would not notice anything. On track there was a difference but not desirable. At one of my local circuits there is a hump on the back straight where my Caterham gets all wheels airborne at around 125mph. With the diffuser installed, I could get the front end higher of the ground which made it awfully exciting coming back to tarmac as it would get very squirrely given it would land unevenly. I ended up putting the Caterham into a university wind tunnel and we found the diffuser was having a mild downforce effect but it was more messing up the front end for front/rear chassis balance. It also became a collector of all rubber, rocks, trash, etc thrown up by the front wheels. I eventually took it off after four years. I think if I had a race set up with a lower ride height, the answer would have been somewhat different. I wanted to use my Caterham for both road and track and so ran a regular road ride height. The diffuser was then not close enough to the ground in track usage to make the effects of its installation positive. Aerodynamics is complicated. Link to comment Share on other sites More sharing options...
Croc Posted March 30, 2022 Share Posted March 30, 2022 Link to comment Share on other sites More sharing options...
chrisr1718 Posted March 30, 2022 Share Posted March 30, 2022 You can get a universal rear diffuser from Kit Car Direct like this... Link to comment Share on other sites More sharing options...
ScottR400D Posted March 30, 2022 Share Posted March 30, 2022 #7 I note that even the sellers don't claim any aero benefit just that it keeps the air out from around the diff. Link to comment Share on other sites More sharing options...
chrisr1718 Posted March 30, 2022 Share Posted March 30, 2022 On a 7, it can't make the aero any worse. Link to comment Share on other sites More sharing options...
ScottR400D Posted March 30, 2022 Share Posted March 30, 2022 I'm not so sure. A dog turd is bad but it's made worse when stepped on........ Link to comment Share on other sites More sharing options...
pkw2704 Posted March 30, 2022 Author Share Posted March 30, 2022 thinking rear type ,I didn't realise they were'nt really liked? ok so another angle ,anyone covered the back underside of the car to protect it and tidy it up a bit ? Link to comment Share on other sites More sharing options...
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