DodgyRog Posted March 18, 2013 Share Posted March 18, 2013 (edited) I have done a search and read through about 30 different short threads, but can't find the basic info I am after Or not in a language I can work out anyway I have HSD MonoPro Coilovers They have adjustment for Height Pre-load and adjustable damping This is where the questions start I have the damping on 12 of 16, so I can still go stiffer, but I was still scrubing on the way home The scrubing happened mainly through dips in the road at speed I will try it on a stiffer setting, but will changing the Pre-Load help and if so how......I like to understand what I am doing rather than just doing what I am told I need to get the whole suspension set to be very stiff before putting the new rims on, so that is the target. The pre-load has me a little confused to be honest So that's really what I am asking about and how to get the stiffness to be able to run a tyre close to the arch Edited March 18, 2013 by DodgyRog (see edit history) Quote Link to comment Share on other sites More sharing options...
spikedjack Posted March 18, 2013 Share Posted March 18, 2013 Increase the preload slightly and up the damping. Otherwise, your tyres are too wide/too low offset on the wheels or you're running it too lol Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 18, 2013 Author Share Posted March 18, 2013 Increase the preload slightly and up the damping. Otherwise, your tyres are too wide/too low offset on the wheels or you're running it too lol Okay I will try upping the Preload and yes to all the above lol Quote Link to comment Share on other sites More sharing options...
spikedjack Posted March 18, 2013 Share Posted March 18, 2013 Okay I will try upping the Preload and yes to all the above lol sounds good make sure the preload you adjust is equal on both axels, same with damping Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 18, 2013 Author Share Posted March 18, 2013 When you say increase the pre-load, that would require the spring to be pushed up further by the 2 collars if my thinking is right Quote Link to comment Share on other sites More sharing options...
Jos Posted March 18, 2013 Share Posted March 18, 2013 (edited) I believe HSD do not recommend upping the preload, and when installing they need only minor preload. But I don't know if it will do any harm when you increase the preload. edit: and yes, you will need to screw the 2 collars up for more preload. Edited March 18, 2013 by Jos (see edit history) Quote Link to comment Share on other sites More sharing options...
Littler Posted March 18, 2013 Share Posted March 18, 2013 Not sure if you have seen this thread but it may be able to help as I'm sure a similar question was asked/answered but can't find it in there lol http://mkivsupra.net/vbb/showthread.php?177475-How-To-Front-amp-Rear-Suspension-Change-Aftermarket-Coilovers-Adjustment Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 18, 2013 Author Share Posted March 18, 2013 Not sure if you have seen this thread but it may be able to help as I'm sure a similar question was asked/answered but can't find it in there lol http://mkivsupra.net/vbb/showthread.php?177475-How-To-Front-amp-Rear-Suspension-Change-Aftermarket-Coilovers-Adjustment Read that one Adam and it's not in there Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 18, 2013 Author Share Posted March 18, 2013 I believe HSD do not recommend upping the preload, and when installing they need only minor preload. But I don't know if it will do any harm when you increase the preload. edit: and yes, you will need to screw the 2 collars up for more preload. So is the only way to make them stiff is to up the damping, surely this will still allow a fair bit of movement in the spring on a prolonged dip Quote Link to comment Share on other sites More sharing options...
Jos Posted March 18, 2013 Share Posted March 18, 2013 Have you already tried the firmest setting? I know someone who recently bought a set and had the same problem as you, but setting it on the hardest setting solved that. Or maybe try to get stiffer springs from driftworks? Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 19, 2013 Author Share Posted March 19, 2013 Have you already tried the firmest setting? I know someone who recently bought a set and had the same problem as you, but setting it on the hardest setting solved that. Or maybe try to get stiffer springs from driftworks? No I have not tried the firmest setting yet, so I will try that, but my understanding of how the suspension works (which is limited) leaves me thinking it won't solve the long dip at speed problem, that's why I was asking how the pre-load thing works, as that is related to the spring which is the part related to the problem Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted March 19, 2013 Share Posted March 19, 2013 Spring preload is adjusted be the 2 locking collars under the spring, its basically making the spring tighter. Personally Id increase the ride height, radical I know Quote Link to comment Share on other sites More sharing options...
Alex Posted March 19, 2013 Share Posted March 19, 2013 Sounds like the ride height is wrong, or the wheel offset. Quote Link to comment Share on other sites More sharing options...
Noz Posted March 19, 2013 Share Posted March 19, 2013 HSD's are hard whatever the setting. Your skip unless it's on a soft setting under speed. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted March 19, 2013 Share Posted March 19, 2013 Yes as said don't try and compensate with just harder damping, if you can raise the ride hight a bit, it might well cure the problem, failing that you can increase the preload, however no by too much and you will then have to increase the damping force to compensate, so you will end up with a very hard ride, and may run out of damping adjustment. Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 20, 2013 Author Share Posted March 20, 2013 I am going to try a combination of a very slight increase in the Pre-Load and raise the height a touch as well I never really push the car that hard, so don't need the perfect suspension setup, I can live with a slight comprise to make these huge rims fit lol Quote Link to comment Share on other sites More sharing options...
RobUK Posted March 20, 2013 Share Posted March 20, 2013 I don't have HSD's Rog but when I setup my Teins I started at the firmest and went backwards.... Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 20, 2013 Author Share Posted March 20, 2013 I don't have HSD's Rog but when I setup my Teins I started at the firmest and went backwards.... Does the suspension react different when driving backward then Rob;) Quote Link to comment Share on other sites More sharing options...
RobUK Posted March 20, 2013 Share Posted March 20, 2013 Does the suspension react different when driving backward then Rob;) Yeah especially at speed Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 20, 2013 Share Posted March 20, 2013 Spring rate keeps the chassis from dropping lower, damper settings adjust how fast the chassis attains its new position. Using spring rate or damper settings to stop a tyre rubbing is sheer and utter madness. A tyre should not rub anywhere from full droop to full compression, hard on the bumpstops. In the case of a front wheel, also from lock to lock during the previous extreme movements. Quote Link to comment Share on other sites More sharing options...
DodgyRog Posted March 20, 2013 Author Share Posted March 20, 2013 Spring rate keeps the chassis from dropping lower, damper settings adjust how fast the chassis attains its new position. Using spring rate or damper settings to stop a tyre rubbing is sheer and utter madness. A tyre should not rub anywhere from full droop to full compression, hard on the bumpstops. In the case of a front wheel, also from lock to lock during the previous extreme movements. I think the slight rub on the front is due to the Arch liner hanging down slightly inside the arch where the overfenders don't have anywhere to fix them to, but I have a solution to try for that, but I just don't seem to have any time to do it at the moment The rear is again an issue that maybe solvable in a bodywork way, but for the time being I am just going to raise the back upto a more stock level, as it is a bit low at the moment and that should solve it until I can try the other way Thanks for the reply Chris I do understand Quote Link to comment Share on other sites More sharing options...
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