Rob F Posted March 1, 2021 Report Share Posted March 1, 2021 I've just fitted 17x8 wheels to my 2006 MX-5 and never had the alignment done when the 30mm Eibach springs were done either. It's used almost daily so looking for decent wheel alignment settings that won't chew tyres but will still provide an engaging ride. Would love to get to WIM to get it sorted but being in West Yorkshire makes it difficult. TIA. Quote Link to comment Share on other sites More sharing options...
Tony Posted March 2, 2021 Report Share Posted March 2, 2021 Hi Rob What are your intention with the car? Daily drive, fast road, competition etc... Quote Link to comment Share on other sites More sharing options...
Rob F Posted March 2, 2021 Author Report Share Posted March 2, 2021 Used almost daily, along with weekend B-road stuff. No intention of tracking it. Quote Link to comment Share on other sites More sharing options...
Tony Posted March 2, 2021 Report Share Posted March 2, 2021 Ok... Measurement is in degrees, 60.minutes. to one degree. The toe angle in minutes locates the wheels width whereas in mm you need to tell the machine the wheel dimensions. Fast-road Rear Camber-1 degree 50' Toe: +6' per side. Front Camber: -50: Toe: -8' per side Castor: +6 degrees.... anything above 5 degrees is fine. Quote Link to comment Share on other sites More sharing options...
Rob F Posted March 2, 2021 Author Report Share Posted March 2, 2021 Very helpful. Thanks Tony. Quote Link to comment Share on other sites More sharing options...
Tony Posted March 3, 2021 Report Share Posted March 3, 2021 Also if you want a more spirted drive then have the cambers front/ rear set -1 degree 30'. Fast road is set to understeer, if you get it wrong you hit whatever head on. The other camber settings will make drive more lively. I had two complaints regarding the fast road setup saying I've made the car too safe. I named that setup as EVO. Quote Link to comment Share on other sites More sharing options...
Rob F Posted March 3, 2021 Author Report Share Posted March 3, 2021 1 hour ago, Tony said: Also if you want a more spirted drive then have the cambers front/ rear set -1 degree 30'. Fast road is set to understeer, if you get it wrong you hit whatever head on. The other camber settings will make drive more lively. I had two complaints regarding the fast road setup saying I've made the car too safe. I named that setup as EVO. Cheers Tony! I presume these settings have a bigger impact on tyre wear? I'll take these along to Atac Align in Huddersfield next week when it's booked in. They reckon to do loads of alignments on 5s. Quote Link to comment Share on other sites More sharing options...
Tony Posted March 3, 2021 Report Share Posted March 3, 2021 There's no additional tyre wear. The camber position is still within the dynamic rage. Quote Link to comment Share on other sites More sharing options...
Rob F Posted March 5, 2021 Author Report Share Posted March 5, 2021 What's your rationale behind the toe settings? They are quite different to the +4' per side front and rear that BOFI and Flyin' Miata suggest. Quote Link to comment Share on other sites More sharing options...
Tony Posted March 5, 2021 Report Share Posted March 5, 2021 Toe is a compliance angle calculated by the size of the bushings the desire for a dynamic position to be 0. I want the toe to be positive. The Reason being a dynamic positive will warm the tyres much faster. Some owners want a static negative toe....... Agreed that will allow a faster turn in but at speed it makes the drive very unstable. Toe can be measured in millimetres so in that case my positions .5 mm. Quote Link to comment Share on other sites More sharing options...
Rob F Posted March 5, 2021 Author Report Share Posted March 5, 2021 1 hour ago, Tony said: Toe is a compliance angle calculated by the size of the bushings the desire for a dynamic position to be 0. I want the toe to be positive. The Reason being a dynamic positive will warm the tyres much faster. Some owners want a static negative toe....... Agreed that will allow a faster turn in but at speed it makes the drive very unstable. Toe can be measured in millimetres so in that case my positions .5 mm. Still +6' and -8' if I for 1"30' camber front and rear? (I'll stop pestering you then, promise...) Quote Link to comment Share on other sites More sharing options...
Tony Posted March 5, 2021 Report Share Posted March 5, 2021 You're not pestering me.. Yes for both settings the toe remains the same. Put it this way. The static toe position is dependant on how much the bushings compress. A car like a Omega has very big bushings so once compressed with the cars forward motion and the tyres rolling resistance it needs a big toe in position. The amount of dynamic toe want will give a dynamic ,5mm. Quote Link to comment Share on other sites More sharing options...
Neill Posted March 15, 2021 Report Share Posted March 15, 2021 Hi, Can I hijack this thread a bit I also have an MX5 NC and came across this thread looking for alignment settings, and am also up in Yorkshire mine has been lowered and sits on coil overs - ride height is 350 mm wheel center to wheel arch, and sits on 8J rims, 45 mm offset and 225 tyres, My local garage has a four wheel alignment machine, using the standard alignment the lowest ride height setting for the NC is 370 mm, will this make a difference to the alignment settings ? the plan is to try a few trackdays and the like with the car, what would you recommend the more spirited cambers front/ rear set -1 degree 30'. Many thanks Neill Quote Link to comment Share on other sites More sharing options...
Tony Posted March 16, 2021 Report Share Posted March 16, 2021 Hi Neil Has anyone measured the castor position? Quote Link to comment Share on other sites More sharing options...
Neill Posted March 16, 2021 Report Share Posted March 16, 2021 Hi Tony, thanks for the reply current castor numbers are 6 degree 40 mins both sides, camber minus 1d 48 m left front and minus 1d 29m right front, left 1d 19 m toe in and right 0d 32 m toe in rear camber - left minus 1d 55 m and right minus 1 d 15 m , left rea 0d 15m toe in and right rear 0d 24 m toe out thanks for any advice Quote Link to comment Share on other sites More sharing options...
Tony Posted March 17, 2021 Report Share Posted March 17, 2021 Castor is very good... I don't like the OS toe. It's position could put the steering offline. What make are the coilovers and what damper settings do you have Quote Link to comment Share on other sites More sharing options...
Neill Posted March 17, 2021 Report Share Posted March 17, 2021 Hi, the coilovers are BC BR, 7kg front springs and 5 kg rear - the shock adjustment is about mid point front and rear - 32 clicks full range hard to soft looking to sort the geo and then play with the shocks what numbers do you recommend for the geo Thanks for your help Quote Link to comment Share on other sites More sharing options...
Tony Posted March 17, 2021 Report Share Posted March 17, 2021 As you have set it, other than the rear toe. Are the settings for the track. Quote Link to comment Share on other sites More sharing options...
Neill Posted March 17, 2021 Report Share Posted March 17, 2021 Hi, thanks, yes, the settings are for the track would you not balance up all the current settings as copied below - for example make the front right camber to match the front left and the front and rear toe more in line with your advice to Rob F - Rear Toe: +6' per side. and Front Toe: -8' per side Current settings Camber minus 1d 48 m left front and minus 1d 29m right front, left 1d 19 m toe in and right 0d 32 m toe in rear camber - left minus 1d 55 m and right minus 1 d 15 m , left rea 0d 15m toe in and right rear 0d 24 m toe out Quote Link to comment Share on other sites More sharing options...
Tony Posted March 18, 2021 Report Share Posted March 18, 2021 What sort of track are you going for? Short track, high speed track, hill and so on? I trust this was a typo "left 1d 19 m toe" Quote Link to comment Share on other sites More sharing options...
Neill Posted March 18, 2021 Report Share Posted March 18, 2021 no not a typo LF is 1' 19" and right is 0'32" will go on a selection of track Blyton Park and Croft for example Quote Link to comment Share on other sites More sharing options...
Tony Posted March 19, 2021 Report Share Posted March 19, 2021 So the front left = 1 degree 19' Quote Link to comment Share on other sites More sharing options...
Neill Posted March 19, 2021 Report Share Posted March 19, 2021 Yes Quote Link to comment Share on other sites More sharing options...
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