PlastererPete Posted July 4 Share Posted July 4 (edited) Hi chaps, Just need some clarification of ride heights for a CSR. I’ve been trawling the search function and found various figures namely CCs factory setup:- Front:- 140-145mm Rear:- 158-163mm But what I can’t find is where these figures are taken from. Is it bottom of the tub to ground? Or the length of a part of the shock/coilover body? The reason for this is that since fitting the newer ZZS profile front tyres the car feels like its nose up while driving (I’m not the lightest of blokes either, which probably doesn’t help). Any help always greatly appreciated. Edited July 8 by PlastererPete Link to comment Share on other sites More sharing options...
SM25T Posted July 4 Share Posted July 4 Underside of the chassis .... front at rear of cycle wing. Rear at front of wheel arch. Don't forget to place the equivalent of your weight in the car. Link to comment Share on other sites More sharing options...
PlastererPete Posted July 5 Author Share Posted July 5 Thanks SM25T. Just got to phone a friend or two and get them to sit in the drivers seat now then 😆 Link to comment Share on other sites More sharing options...
prisoner7 Posted July 5 Share Posted July 5 Not sure if this is totally relevant but hope it helps. Achseinstellungen Caterham.pdf 1 Link to comment Share on other sites More sharing options...
PlastererPete Posted July 5 Author Share Posted July 5 (edited) Just got home and measured and have 165mm front and rear without my fat arse in it. So no wonder I’m feeling like I’m nose up in the car. I have 90mm sump clearance to the ground from its lowest point and would like to keep as much of that as possible considering I’ve given it a good thwack once already in my ownership and hit the hoop underneath a couple of times thanks to the state of the roads. Whats the downsides if I were to higher the back slightly only? I’m no track driver but do enjoy buzzing around the B-roads. Edited July 5 by PlastererPete Link to comment Share on other sites More sharing options...
SM25T Posted July 5 Share Posted July 5 (edited) Not sure if the CSR is the same, but the deDion cars should be 15mm higher at the rear point compared to the front, with the equivalent of your weight (and passenger weight too if that's how you normally travel). Try it and see how it feels ? Edited July 5 by SM25T Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted July 5 Member Share Posted July 5 Jonathan 1 Link to comment Share on other sites More sharing options...
PlastererPete Posted July 5 Author Share Posted July 5 1 hour ago, SM25T said: Not sure if the CSR is the same, but the deDion cars should be 15mm higher at the rear point compared to the front, with the equivalent of your weight (and passenger weight too if that's how you normally travel). Try it and see how it feels ? According to what I've found on the forum from searching the CSR is the same in regards to a 15mm rake for road use as per an S3. I'll take the rear wheels off tomorrow and adjust the rear spring platforms. Won't be able to drive it as its persisting down with rain all weekend. now......just got to find a C-spanner that fits 🤔 Link to comment Share on other sites More sharing options...
PlastererPete Posted July 8 Author Share Posted July 8 So got myself a couple of cheap-ish adjustable spanners that do 76mm. Gave it a try this afternoon and cannot get them to budge. Tried two spanners opposing forces, tried just the top ring to heighten the spring, just the lower ring to break it away from the top one but no joy. Even tried a few taps with a hammer to shock it to move down. Anyone got any tips? Its currently soaking in Plusgas until tomorrow. Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted July 8 Area Representative Share Posted July 8 I used 3.5 25Kg bags of sand on the drivers seat (squab removed) when adjusting my rake/ride height. Nothing in the pax seat as I rarely take any. SWMBO confessed that she now knows my true worth !! 1 Link to comment Share on other sites More sharing options...
SM25T Posted July 8 Share Posted July 8 (edited) You need to crack the two rings apart first. They are intentionally locked against each other. If they have holes around the collars, you can use stubby crosshead screwdrivers as handles. If they have notches you need a suitable pair of c-spanners. Once separated, lift the car so that wheel is off the ground ... it makes adjustment so much easier Edited July 8 by SM25T Link to comment Share on other sites More sharing options...
PlastererPete Posted July 8 Author Share Posted July 8 Yep I’ve got C-spanners, car is jacked up, wheel is off (as its the rears I’m doing first). Just got a feeling I’m doing something stupid. I’m assuming they are both threaded the same (righty tighty etc). Link to comment Share on other sites More sharing options...
OldAndrewE Posted July 8 Share Posted July 8 They are are both threaded the same way as they are on the same thread. Looking down the top one needs to go anticlockwise and the bottom one clockwise 1 Link to comment Share on other sites More sharing options...
SM25T Posted July 8 Share Posted July 8 It can take a fair bit of force to crack then apart. Put a bit of tube on handle of spanners to get extra leverage. Wear thick gloves and mind your knuckles !! Link to comment Share on other sites More sharing options...
PlastererPete Posted July 8 Author Share Posted July 8 (edited) I’ve given the spanners a few taps with the hammer. I’ll try again tomorrow and resort to a drift and see how it goes. As far as I’m aware they haven't been touched since 2009. Just hoping they aren’t corroded together. Edited July 8 by PlastererPete Link to comment Share on other sites More sharing options...
SM25T Posted July 8 Share Posted July 8 PlusGas. Bit of heat from an electric hot air gun too. 1 Link to comment Share on other sites More sharing options...
OldAndrewE Posted July 8 Share Posted July 8 Are you trying to move them one at a time? It will be better to try both together, either squeezing the spanners together or pulling them apart (depending on how you can position the spanners). As Ian says, mind your knuckles Link to comment Share on other sites More sharing options...
PlastererPete Posted July 8 Author Share Posted July 8 1 minute ago, OldAndrewE said: Are you trying to move them one at a time? It will be better to try both together, either squeezing the spanners together or pulling them apart (depending on how you can position the spanners). As Ian says, mind your knuckles Tried both at the same time in both directions then one at a time in both directions. I’ll soak it well again this evening with plusgas and give the heat a go tomorrow. I’m dubious of the heat as I’m unsure if it’s just oil filled or oil and gas. But i’ll be careful. Thanks for the help and suggestions as always. Link to comment Share on other sites More sharing options...
SM25T Posted July 8 Share Posted July 8 Leverage is your friend. Long handles make a huge difference. Link to comment Share on other sites More sharing options...
PlastererPete Posted July 8 Author Share Posted July 8 Theres not an awful lot of room to get any leverage. Shes been thoroughly doused again, i’ll soak it again before work tomorrow and hopefully I’ll have some success tomorrow evening. Link to comment Share on other sites More sharing options...
SM25T Posted July 8 Share Posted July 8 You might let one spanner lock against the wishbone while you use all your might on the other ? Link to comment Share on other sites More sharing options...
JP Posted July 8 Share Posted July 8 On 05/07/2024 at 18:06, Jonathan Kay said: Jonathan Out of interest, why is the camber and castor different from left to right? Link to comment Share on other sites More sharing options...
Leadership Team Shortshift Posted July 8 Leadership Team Share Posted July 8 (edited) Here are the official factory setting to work to (more or less identical between standard CSR and Superlight CSR). Note that the nominal rake is circa 18mm. James Edited July 8 by Shortshift Link to comment Share on other sites More sharing options...
Leadership Team Shortshift Posted July 8 Leadership Team Share Posted July 8 26 minutes ago, JP said: Out of interest, why is the camber and castor different from left to right? I think the figures in that column refer to measurements taken from a particular car, and show measured values (presumably after set up) against specified values. The car has very slight left-to-right differences in geo. James Link to comment Share on other sites More sharing options...
Leadership Team Shortshift Posted July 8 Leadership Team Share Posted July 8 42 minutes ago, PlastererPete said: Theres not an awful lot of room to get any leverage. Shes been thoroughly doused again, i’ll soak it again before work tomorrow and hopefully I’ll have some success tomorrow evening. If leverage is an issue, it may be easiest (and fastest) to drop the damper/spring assy from the car and attack it on the bench. James Link to comment Share on other sites More sharing options...
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