Pete Lewis Posted September 28 Report Share Posted September 28 i think it is always desireable to keep the differential front to back even if the psi you use is a good bit higher than the WSM aged data there is a sort of natural balance to keep the front pointing where you want to end up trial and error combined with your own driving style will give you a feel for what you like quite quickly Pete Link to comment Share on other sites More sharing options...
JohnD Posted September 28 Report Share Posted September 28 Yes, I have, and no, less in the rear. Unless you hammer it! Link to comment Share on other sites More sharing options...
James H Posted September 28 Author Report Share Posted September 28 2 minutes ago, JohnD said: Yes, I have, and no, less in the rear. Unless you hammer it! Thanks John, it had to be really, anyway glad someone has actually tested the theory on track, almost certainly a Triumph misprint then but each to their own as to what they prefer Link to comment Share on other sites More sharing options...
Iain T Posted September 28 Report Share Posted September 28 A softer rear is always desirable.... Iain Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) On 27/09/2024 at 15:13, Pete Lewis said: the drop plate or drop block fits under the spring and locates in the top of the diff they come in 1/2" 3/4" and 1" thicknesses . to preserve you pistons you dont want any persistent pinking it can fail a piston in time without any warning definitely check the damper ring we had this on our 1600 back in the early 2000's makes for good head scratching , you could turn our ring with your fingers , i would not waste any funds on octane boosters ,your 98 should be fine (providing thats what you actually got) most of us run on 97/98 with factory setting and they are fine do you have a std distributor or some after market hopeless replacement ???? Pete Pete Pete hi, finally got around to checking under the rear and strangely I can confirm there is no drop plate of any size fitted, back to the drawing board re the low ride height but more importantly I'm bl**dy glad I did as I discovered all four drivers side drive shaft bolts to the diff were not only slack but wobbly loose, omg ! Couldn't get a socket on so it was a double spanner job which doesn't seem ideal for adequate torque but I've done my best 🙏 Also is it normal for the drive shafts to make contact with the frame when both rear wheels are off the ground to the point where the wheels cant be turned by hand ? I had to tighten the bolts in pairs, lowering it down, rolling it forward and jacking it up again to do the other two... Edited September 30 by James H Link to comment Share on other sites More sharing options...
johny Posted September 30 Report Share Posted September 30 So nothing like this then James? Can be difficult to spot as not always shiney like in the photo. Also how many blades has the spring got, should be 11? Link to comment Share on other sites More sharing options...
Colin Lindsay Posted September 30 Report Share Posted September 30 9 minutes ago, James H said: Pete hi, finally got around to checking under the rear and strangely I can confirm there is no drop plate of any size fitted, back to the drawing board re the low ride height but more importantly I'm bl**dy glad I did as I discovered all four drivers side drive shaft bolts to the diff were not only slack but wobbly loose, omg ! Couldn't get a socket on so it was a double spanner job which doesn't seem ideal for adequate torque but I've done my best 🙏 Also is it normal for the drive shafts to make contact with the frame when both rear wheels are off the ground to the point where the wheels cant be turned by hand ? I had to tighten the bolts in pairs, lowering it down, rolling it forward and jacking it up again to do the other two... Normal on my Heralds, anyway. I have to pad the rear axles out by fitting some kind of protector between axle and chassis rail to avoid paint damage after refurbishing a rear spring, until the weight of the bodytub pressing down raises the axles off the chassis again. Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 6 minutes ago, Colin Lindsay said: Normal on my Heralds, anyway. I have to pad the rear axles out by fitting some kind of protector between axle and chassis rail to avoid paint damage after refurbishing a rear spring, until the weight of the bodytub pressing down raises the axles off the chassis again. Thanks Colin, interestingly when I jacked it up the second time the passenger side tyre was left touching the ground and the drivers side spun freely so apparently only an issue with both off Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) 17 minutes ago, johny said: So nothing like this then James? Can be difficult to spot as not always shiney like in the photo. Also how many blades has the spring got, should be 11? Hi, nope definitely not one and yes 11 leaves counted with a finger nail Edited September 30 by James H Link to comment Share on other sites More sharing options...
johny Posted September 30 Report Share Posted September 30 Doesnt leave many possibilites then. Could be later long drive shafts fitted but I would have thought that would be noticeable and cause problems with tyre to wheel arch clearance or, more likely, the spring is different either through blade thickness, its tempering or curve set. Either way if not bottoming out a lower back end is definitely better for handling... Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 4 minutes ago, johny said: Doesnt leave many possibilites then. Could be later long drive shafts fitted but I would have thought that would be noticeable and cause problems with tyre to wheel arch clearance or, more likely, the spring is different either through blade thickness, its tempering or curve set. Either way if not bottoming out a lower back end is definitely better for handling... Odd as to why then but absolutely, I prefer the look and drives great, seems I've lucked in for once ! There is a noticeable camber from the rear too (again preferable) so let me know what to measure for re the shafts, could be the case... Link to comment Share on other sites More sharing options...
johny Posted September 30 Report Share Posted September 30 I make it approximately 314mm between the centre line of the UJ to the shaft dust shield (obviously pushed up against the bearing carrier) for a short shaft and an inch more for a long one.... Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 4 minutes ago, johny said: I make it approximately 314mm between the centre line of the UJ to the shaft dust shield (obviously pushed up against the bearing carrier) for a short shaft and an inch more for a long one.... Thanks so much for doing that and turns out mine are the short ones then, very weird but no problemo it will stay as is Link to comment Share on other sites More sharing options...
johny Posted September 30 Report Share Posted September 30 was that measurement pretty close as it could do as a reference? Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 30 Report Share Posted September 30 fitting a lowering block between diff and spring will reduce camber from \-/ to more |--| Pete Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) 17 hours ago, johny said: was that measurement pretty close as it could do as a reference? Seems spot on 👍 Edited October 1 by James H Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) 10 minutes ago, Pete Lewis said: fitting a lowering block between diff and spring will reduce camber from \-/ to more |--| Pete Mine is /--\ without a lowering block and with short shafts... Edited September 30 by James H Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) Pete I remember you looked up the Canley part code and thought it might be an error but could it be that the spring is shortened, maybe a custom ? The camber is slightly exaggerated in the photo because of the way I've pulled into the space, if I reversed out straight and in again it would be slightly less but even so it has increased camber. Edited September 30 by James H Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 30 Report Share Posted September 30 well anything is possible you could call Dave at Canley and ask ?? if the camber changes when you reverse then the rear toe is incorrect Pete Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 (edited) 31 minutes ago, Pete Lewis said: well anything is possible you could call Dave at Canley and ask ?? if the camber changes when you reverse then the rear toe is incorrect Pete I spoke to Dave in the past about the drivers side being slightly lower, thats why I had the photo of the spring, and on the spot he effortlessly rattled off a list of a dozen things to check but I didn't mention the camber or general ride height. He said he beleived the spring to be standard for the car and that customs are a thing of the past but like I said I only mentioned the ride height difference because at the time I was none the wiser about the general ride height or camber being suspiciously off. The only thing on his list I haven't verified are the trunnion bolts, to be honest haven't got my head around how they function but will look into it... Edited September 30 by James H Link to comment Share on other sites More sharing options...
Steve P Posted September 30 Report Share Posted September 30 Yours is lower than my Vitesse, and that has an old TriumphTune lowered and de-cambered spring on it, have you got 3 chopped up bodies in the boot?. S 1 Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 1 minute ago, Steve P said: Yours is lower than my Vitesse, and that has an old TriumphTune lowered and de-cambered spring on it, have you got 3 chopped up bodies in the boot?. S Just had a look and negative, shame that would've explained things... Trust me my mind is melting over this one as everything seems stock, got to be a variable I'm missing ! Its got a TriumphTune rocker cover, could that be a clue to other work having been done ?? Link to comment Share on other sites More sharing options...
Steve P Posted September 30 Report Share Posted September 30 Maybe although there are modern repro`s and old original ones around with slight differences. Steve Link to comment Share on other sites More sharing options...
Iain T Posted September 30 Report Share Posted September 30 I've got it...... gravity is greater in France 😁 Link to comment Share on other sites More sharing options...
James H Posted September 30 Author Report Share Posted September 30 2 minutes ago, Steve P said: Maybe although there are modern repro`s and old original ones around with slight differences. Steve The text on mine looks suspect so I'm guessing a repro... Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now