Sizes & Torque
Discussion
Hi all,
Just some quick questions for anyone:
S2 Brake line (fittings) thread size - M10x1.00, M10x1.25 or something else ?
S2 steering wheel nut torque ?
Possibly changing rear 225/45's to 235/45's with 195/50's up front (Exige combo).... pros/cons ?
Cheers, Phil.
>> Edited by Stonie on Saturday 15th April 11:28
>> Edited by Stonie on Saturday 15th April 11:29
>> Edited by Stonie on Saturday 15th April 11:29
Just some quick questions for anyone:
S2 Brake line (fittings) thread size - M10x1.00, M10x1.25 or something else ?
S2 steering wheel nut torque ?
Possibly changing rear 225/45's to 235/45's with 195/50's up front (Exige combo).... pros/cons ?
Cheers, Phil.
>> Edited by Stonie on Saturday 15th April 11:28
>> Edited by Stonie on Saturday 15th April 11:29
>> Edited by Stonie on Saturday 15th April 11:29
77/lb/ft on the wheelnuts
235/45 isnt exactly the right size in order to keep the circumference correct and your speedo reading right you would want 245/40 ...downsides are you may have trouble with rung and need some spacers...and they may be too wide for the rims..and with spacers they may stick out and look odd...and you have a limited tyre choice to get matching fronts....so in other words - I wouldnt bother !
Ive looked at all sorts of options for wider rubber and there are not any easy ones without body mods/spacers/different wheels etc
some of the guys that do Autocross (like sprinting) in the USA on 111Rs do run 205 f and 2235/245 rears with mixed results - have a look on Elisetalk www.elisetalk.com ...
235/45 isnt exactly the right size in order to keep the circumference correct and your speedo reading right you would want 245/40 ...downsides are you may have trouble with rung and need some spacers...and they may be too wide for the rims..and with spacers they may stick out and look odd...and you have a limited tyre choice to get matching fronts....so in other words - I wouldnt bother !
Ive looked at all sorts of options for wider rubber and there are not any easy ones without body mods/spacers/different wheels etc
some of the guys that do Autocross (like sprinting) in the USA on 111Rs do run 205 f and 2235/245 rears with mixed results - have a look on Elisetalk www.elisetalk.com ...
Brake lines...haven't a clue.
Steering wheel nut torque...25 Nm (the torque figure Bogie has quoted you is for the nuts that hold the road wheels on!)
Bigger tyres:
Pros...more grip on smooth surfaces, less understeer than the standard S2 set-up if you play with tyre pressures/damping.
Cons...you have increased unsprung weight, so the car will be slightly under-damped if you retain the standard dampers (which Lotus will have had very carefully valved, after much testing, to optimise them for the lighter, standard wheel/tyre combo), so ideally you will want to fit adjustable dampers so that you can compensate.
Speedo calibration will be out because you have changed the rolling diameter.
The car will be prone to more abrubt oversteer at the limit...Lotus reduced the front tyre section on the S2 (compared to the S1) because the car was being bought in larger numbers than they had anticipated and some drivers who were not used to light, mid-engined cars couldn't deal with the edgy on-the-limit handling of the S1.
Potential clearance and availability issues, as discussed by Bogie.
Like Bogie, I wouldn't bother if I were you. Maybe just up the front tyre sections to 185's to kill a bit of the understeer, if it bothers you. Rear grip isn't normally a problem.
>> Edited by Sam_68 on Saturday 15th April 12:46
Steering wheel nut torque...25 Nm (the torque figure Bogie has quoted you is for the nuts that hold the road wheels on!)
Bigger tyres:
Pros...more grip on smooth surfaces, less understeer than the standard S2 set-up if you play with tyre pressures/damping.
Cons...you have increased unsprung weight, so the car will be slightly under-damped if you retain the standard dampers (which Lotus will have had very carefully valved, after much testing, to optimise them for the lighter, standard wheel/tyre combo), so ideally you will want to fit adjustable dampers so that you can compensate.
Speedo calibration will be out because you have changed the rolling diameter.
The car will be prone to more abrubt oversteer at the limit...Lotus reduced the front tyre section on the S2 (compared to the S1) because the car was being bought in larger numbers than they had anticipated and some drivers who were not used to light, mid-engined cars couldn't deal with the edgy on-the-limit handling of the S1.
Potential clearance and availability issues, as discussed by Bogie.
Like Bogie, I wouldn't bother if I were you. Maybe just up the front tyre sections to 185's to kill a bit of the understeer, if it bothers you. Rear grip isn't normally a problem.
>> Edited by Sam_68 on Saturday 15th April 12:46
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