myothercarsa2cv Posted March 6, 2014 Share Posted March 6, 2014 To reverse the louvres on the bonnet? In particular, the ones usually used for the heater? Would it just be a case of hammering it a bit? Or is there someone who could do this easily? Thinking is that I could build me a little airbox to sit where the heater sits, taking air through the louvres, but at the moment they are the wrong way round. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted March 6, 2014 Member Share Posted March 6, 2014 Very easy to hammer them through. But what's the technical term for something that is several orders of magnitude worse looking than a pig's ear? You might just get away with it using a punch similar to the one that puts them in, a lot of skill and some practice. But it should be able to punch a new bonnet the wrong way with good outcome... Jonathan PS: I toured the Morgan factory as a teenager and was fascinated by the man doing the bonnet louvres as he didn't use a jig. But he did say he'd been doing it for forty years. Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2014 Author Share Posted March 6, 2014 Do you think he's still there? I figured a jig might be the way - maybe I'll talk to Bruce at Arch... Would rather not have to spend £200 on a new one though Link to comment Share on other sites More sharing options...
Klunk Posted March 6, 2014 Share Posted March 6, 2014 Random thoughts.... 1) Cut the section out, rotate 180deg and weld back in. 2) See of anyone's got an early bonnet (no heater louvres) then get the louvres stamped in. 3) Get a section made up with louvres and then cut out originals and weld/rivet panel into place. 4) Abandon the louvre thing and feed the airbox from the front Regards, Giles Edited by - Klunk on 6 Mar 2014 16:08:22 Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2014 Author Share Posted March 6, 2014 1) and 3) would look a bit rubbish even for me and 4) the front is just so far away! One of the pleasures of having a TB that faces the bulkhead... 2) is an interesting idea. Just musing for now, I still have to figure out how to make the box Link to comment Share on other sites More sharing options...
Myles Posted March 6, 2014 Share Posted March 6, 2014 I think it has been done before - I seem to remember someone asking arch to do a special. Thing is, how sure are you that they would force air in effectively? There's an awful lot of air entering the engine bay through the nose - and all kinds of movement and interaction via the underside. The louvres aren't exactly huge scoops - and you can't be sure that they stick in high-pressure areas (and have low pressure below them). In short, it might be an expensive waste of time. If the airbox is reasonably-well sealed to the bonnet, I'd have thunk that the engine would be able to breathe almost/just as well through conventional louvres. I am *no* expert, but I did have demonstrable success (in air temp terms if not noticeable power gains!) by ducting air from over the top of the radiator (with a suitable splitter to keep warm air below the duct) - but that was with a front-entry airbox. Link to comment Share on other sites More sharing options...
David Mirylees Posted March 6, 2014 Share Posted March 6, 2014 My bonnet has the heater louvres reversed from standard. It is (was in 1988) the standard bonnet on cars going to Switzerland. Reason I got mine like that when I re-chassied was I have a GT6 heater mounted vertically on the cockpit side of the scutlle and the louvres drive air into the heater. At the time Graham Nearn told me that my car should be standard! - are any? Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2014 Author Share Posted March 6, 2014 Thanks. Myles, I have no idea if it will work! I'm sure I could rig a pressure sensor of some sort up to check what happens... And if I could do that, it's a shame David isn't closer as it would be easy to switch the bonnet and see if that makes a difference! I'll make a box first (give me a year or two ) and take it from there, I guess! Link to comment Share on other sites More sharing options...
Martin J Posted March 6, 2014 Share Posted March 6, 2014 John I have a bad feeling about this. Best leave alone. Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted March 6, 2014 Share Posted March 6, 2014 Rain will run in on the move if you reverse them John. Link to comment Share on other sites More sharing options...
Steve Cornford Posted March 6, 2014 Share Posted March 6, 2014 You could go over to the dark side & get one of these with a hole in the bonnet 😬 Link to comment Share on other sites More sharing options...
elie boone Posted March 6, 2014 Share Posted March 6, 2014 Pressure sensor ? a piece of string attached with some tape will do the trick Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2014 Author Share Posted March 6, 2014 Quoting SM25T: Rain will run in on the move if you reverse them John.Good point Ian. I'll have to have drain holes Maybe I'll try it with it as it is for now... How bad can it be? And yes Elie, that is a very good idea Steve, that's really quite good looking. I wonder how much effort it would be to get that on a 7 chassis? Same wheelbase and track, pretty much Link to comment Share on other sites More sharing options...
Roger Ford Posted March 6, 2014 Share Posted March 6, 2014 Just cut a hole, and glue one of these over it. If you want it to look reallyprofessional, you could paint it the same colour as the bonnet as well. Link to comment Share on other sites More sharing options...
Grandmaster Flatcap Posted March 6, 2014 Share Posted March 6, 2014 This would be cheaper Link to comment Share on other sites More sharing options...
myothercarsa2cv Posted March 6, 2014 Author Share Posted March 6, 2014 Thanks chaps Link to comment Share on other sites More sharing options...
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