What about MG/Jag style bonnet louvres? On the right colour panel they would just about disappear.
**I hope you have a better taste in wheels though
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| Dutchy’s MiniRex https://www.ausmini.com/forums/viewtopic.php?f=23&t=100203 |
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| Author: | Stuwey [ Tue Aug 04, 2020 4:28 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
What about MG/Jag style bonnet louvres? On the right colour panel they would just about disappear. **I hope you have a better taste in wheels though |
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| Author: | hewey [ Tue Aug 04, 2020 6:02 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Following on from the vent discussion. This is an interesting discussion about raising the rear edge of the bonnet to create cooling. http://www.theminiforum.co.uk/forums/to ... d-bonnets/  So the same principles would apply for expelling how you want to. I'm sure you could come up with an actuator set up that you could open and close while on the fly. Which brings me to... Another idea to throw in to the mix is an air scoop which is manually activated by a cable, like the Ram Charger/Airgrabber set ups on Mopars. These were used for bringing cold air in, but no reason the principle couldn't be applied to expelling air as well. https://moparconnectionmagazine.com/the ... induction/   And a few other ideas to throw in to the mix    
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| Author: | Dutchy1978 [ Tue Aug 04, 2020 7:11 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
The last one looks good. The mini bonnet is not quite as long though. Sent from my iPad using Tapatalk |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 1:27 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Found this last night. Not a fan of the complete car but liking the bonnet duct. Would look good in paint I reckon.  
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| Author: | fuzzy-hair-man [ Wed Aug 05, 2020 4:22 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Yeah, that scoop looks like it's going to do something too, wondering if arc angels, carbon wheezel or some others that are doing rwd conversions have them and sell them. Dutchy1978 wrote: Mearcat wrote: So just to confirm, it's a WRX engine/drivetrain and rear subframe with MX5 suspension geometry? Yes that’s correct. Subframe is now custom using the lower and upper MX5 control armsA good choice to my mind, I don't really think much of Macpherson struts, thier chief strengths seem to be packaging and cost, everyone seems to have learnt to time suspension around thier faults. Any thoughts on where the rear roll centre should be on a rear engine rwd car? |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 4:47 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Centre of gravity should be just in front of the engine. Height should be around the top of the engine which is about half the height of the car. Rear Roll centre should be inline with the rear axle/gearbox LSD hopefully. Sent from my iPad using Tapatalk |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 4:48 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Won’t be using McPherson struts either. Sent from my iPad using Tapatalk |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 4:57 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Rear roll centre on a FWD tend to be higher than RWD. See diagram below. I think the centre of gravity will be the real benefit of this project if the suspension and brake setup is done right.   Sent from my iPad using Tapatalk |
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| Author: | fuzzy-hair-man [ Wed Aug 05, 2020 5:22 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Are you using the standard mini front subframe? If so the extented ball joints and or raising the inner pivots on the lower arm could help raise the front roll centre to be similar to the porsche in your picture, sorry I said rear engine but yours is more mid engined. Do you have a link for where you sourced those images? I'd like to do some more reading... I found this on the Z cars website,  It might give a clue as to how to source a bonnet. |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 5:26 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Quite an interesting read. https://suspensionsecrets.co.uk/roll-ce ... ll-moment/ Sent from my iPad using Tapatalk |
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| Author: | fuzzy-hair-man [ Wed Aug 05, 2020 10:03 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Dutchy1978 wrote: Thanks, that site will give me a fair bit of reading. I found the explanation of why the roll axis (neutral roll axis) is inclined differently for front and rear wheel drive interesting, I can understand that roll provides the driver with feedback, and that you would probably want more feedback from the driven wheels so a greater roll moment at the driven end is desirable. I've previously read about roll frequency, that is how quickly a suspension rolls, the explanation for a inclined roll axis was that the front is the first to experience the lateral acceleration and roll, the rear experiences it only after and because of the front. If the roll moment was the same the front would roll then the back leading to a vague, delayed and weird feeling (technical term). I believe I've felt this in my mini (which has a declining roll axis) on a short sharp corner it felt fine on a longer faster corner it felt like the rear wouldn't decide what it wanted to do, grip or step out. I partially solved it with progressive bump stops on the rear, I believe it was relatively quickly settling on the bump stop meaning the rear roll frequency better matched the front. I've managed to try and sort the minis skewed roll axis by raising the rear roll axis, it's passed engineering but isn't registered yet so I've not much idea of it has improved things markedly. With most of your weight centered it might be a safe bet for a relatively flat roll axis, I'm not sure it hasn't something to do with where most of the weight is as well as weight will generate roll. Sorry long, stream of consciousness post... 
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 10:35 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Cheers thanks for that. I’m yet to read it all but will take what I can from the site as it looks to be quite informative. I don’t want to get too carried away though as it is still a mini and a weekend toy. Won’t ever be a race car. As long as it handles around street corners well and brakes well then I’ll be happy. Sent from my iPad using Tapatalk |
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| Author: | Dutchy1978 [ Wed Aug 05, 2020 10:43 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Not much done this week. Melbourne went to stage 4 restrictions and threw the business world into chaos. Manage to tack on the lower control arm mounts to what will be the start of the subframe. All the adjusting bolts seem to work well.  
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| Author: | cooperess [ Thu Aug 06, 2020 11:18 am ] |
| Post subject: | Re: Dutchy’s MiniRex |
I have the MX-5 bushes if you need them (SuperPro) |
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| Author: | Dutchy1978 [ Thu Aug 06, 2020 2:36 pm ] |
| Post subject: | Re: Dutchy’s MiniRex |
Im still undecided on whether I should change them to polyurethane or not. My VTEC mini had all polyurethane and you could feel every vibration through the engine and suspension. Given the MX5 and WRX are sports cars with good factory bushes I am considering leaving them or replacing them with new genuine ones to reduce the vibration. If I go with aftermarket I'll let you know. cheers |
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