SpitFire6 Posted June 19, 2020 Report Share Posted June 19, 2020 Hi, my car is not with me at the moment. 6 cylinder CP with GT6 flywheel & a GT6 starter motor. Was original fitted with a GT6 gearbox. A TR gearbox was fitted round 15 years ago & I only remember a "bush" being fitted into the flywheel. Concerning TR & GT clutch parts: Are release bearings the same? Are cover plate mountings the same? Are driven plates the same? Thinking it must match the input shaft. Cheers, Iain. Link to comment Share on other sites More sharing options...
Clive Posted June 19, 2020 Report Share Posted June 19, 2020 All yes unless it a tr gearbox with the larger input shaft, then you will need the appropriate tr plate and I presume bearing. Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 19, 2020 Author Report Share Posted June 19, 2020 Hi Clive, Excluding release bearings that can be purchased separately to match physically what I have at relatively small additional cost. Cover plates are the same mounting points? The driven plate is dependent on drive splines/diameter? I need an uprated clutch. Three-piece uprated clutches appear to be available for both boxes. I don't have a problem buying an additional release bearing; the cheapest part! Cheers, Iain. 1 Link to comment Share on other sites More sharing options...
Clive Posted June 20, 2020 Report Share Posted June 20, 2020 I think its best to see what is in there, then just buy either 2000/gt6/sprint etc clutch kit, or if the larger input shaft the TR kit. If TR I bet there are some uprated options from the motorsport suppliers. 1 Link to comment Share on other sites More sharing options...
Nigel Clark Posted June 20, 2020 Report Share Posted June 20, 2020 2 hours ago, clive said: I think its best to see what is in there, then just buy either 2000/gt6/sprint etc clutch kit, or if the larger input shaft the TR kit. If TR I bet there are some uprated options from the motorsport suppliers. +1 See what's currently fitted before ordering. The clutch covers for GT6 and TR6 are the same, so no issue there. I would expect with a TR5/6 gearbox, you will need the larger splined TR6 driven plate and TR5/6 release bearing. The spigot bush should also be TR6. I would be interested to know how your gearbox has been fitted into the limited space of the GT6, and what mount is used. Also where does the gear lever sit? Sooner or later I will have to upgrade the gearbox and overdrive in my 2.5 litre GT6 and will need to choose between a TR/big saloon box or Mike Papworth's uprated GT6 box, based on Dolomite 1850 internals. Clearly fitting the TR box would be more complicated. Nigel Link to comment Share on other sites More sharing options...
Clive Posted June 20, 2020 Report Share Posted June 20, 2020 I fitted a Saloon box to my vitesse Downside was teh saloon first gear ration, absolutely hopeless, sprint/TR much better but still not as long as GT6. I also had issues with clutch release, the angles were rong, and I really needed a spacer or longer throwout bearing/carrier (as I used teh GT6 flywheel) The GT6 flywheel also need machining to accept the TR spigot bearing as teh nose of the input shaft is too short to reach the crank (a hangover from the longback early six cylinder cranks?) As to fitting, a vitesse tunnel fitted, just, and possibly tweeked, but stick in exact same position. Used sprint slave cylinder bracket and cross shaft. I welded a plate between the chassis rails and attached to the "bridge" allowing a std j type mount to be used. What would I do now? Not sure.... maybe see if an RX8 5 speed box can be fitted!! Or maybe one of the MX5 boxes that are being sold for the TR's (Not cheap until you realise what you are getting.... and with your job they may be keen to develop a kit for GT6/vitesse, looks a better option than the type 9 conversions) https://www.vitesse-ltd.com/products/vittr253?variant=29075688587347 1 Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 21, 2020 Author Report Share Posted June 21, 2020 14 hours ago, Nigel Clark said: +1 See what's currently fitted before ordering. The clutch covers for GT6 and TR6 are the same, so no issue there. I would expect with a TR5/6 gearbox, you will need the larger splined TR6 driven plate and TR5/6 release bearing. The spigot bush should also be TR6. I would be interested to know how your gearbox has been fitted into the limited space of the GT6, and what mount is used. Also where does the gear lever sit? Sooner or later I will have to upgrade the gearbox and overdrive in my 2.5 litre GT6 and will need to choose between a TR/big saloon box or Mike Papworth's uprated GT6 box, based on Dolomite 1850 internals. Clearly fitting the TR box would be more complicated. Nigel Hi, Max from the NW installed first with no visible change apart from the OD switch cover with different position of R. No pictures exist. I have several pictures of the GB & new chassis from 2010ish but does not appear to show mounting. Could be just pictures for show. I have several pictures of build that don't match reality. some because things were changed. I have seen some uprated "blackDiamond"? 3 piece kits for GT6's but not for TR5/6. Confused. Wanting best bang for but do not want to spend 250 quid for parts if there is a better option. I do need something that will handle without slipping, foot pressure not an issue as I will live with it. 2 Link to comment Share on other sites More sharing options...
Steve P Posted June 21, 2020 Report Share Posted June 21, 2020 I too fitted a Saloon box with J type OD to my tuned 2.5 Vitesse,Vitesse MK 1 flywheel with modified Spigot bush. Standard clutch only lasted 10k miles so i fitted the below one. Did have some geometry issues after the change but sorted with a shorter bearing carrier. Steve Link to comment Share on other sites More sharing options...
thescrapman Posted June 21, 2020 Report Share Posted June 21, 2020 Isn't the Gt6 clutch common to some fords, certainly transits rings a bell, or perhaps just driven plate. must be able to get a paddle clutch plate of suitable dimensions. Link to comment Share on other sites More sharing options...
Clive Posted June 21, 2020 Report Share Posted June 21, 2020 29 minutes ago, thescrapman said: Isn't the Gt6 clutch common to some fords, certainly transits rings a bell, or perhaps just driven plate. must be able to get a paddle clutch plate of suitable dimensions. Fine spline is the same, but I haven't stumbled across anything coarse spline. The TR chaps must have something suitable, they seem to be getting some high numbers out of their cars. I guess the cover is important as it provides the clamp force? A pinto clutch copes with almost 200bhp OK.... Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 21, 2020 Report Share Posted June 21, 2020 the main trouble with paddle discs is they need use , if you tickle around they are stop or go no progression the pads are hard there is no take up sprung between the pads like a ferodo disc can be good for racing poor for town and around Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 21, 2020 Author Report Share Posted June 21, 2020 Hi all, I saw this company: http://www.blackdiamondperformance.com/clutch_triumph.htm No mention of TR5/6 which made me think of major differences. I then found a company selling them: https://www.dcperformance.co.uk/performance/triumph/gt6.html The three different kits available from £200 to £380. They call them stages. Stage 1 These clutches are designed for use with a standard or mildly modified engine - where torque and engine revs are 20-25% up from standard.Stage 2 This clutch is designed for high revving engines where the vehicle’s power has been increased 25-30% above standard.Stage 3 Designed for use with highly modified engines (up to 40% above standard). Looking at the numbers they quote it looks like none of them are suitable for a 2.5 150HP engine in any case. Also the friction part would not fit a TR shaft. Off to look at the expensive TR ones. Thanks, Iain. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 21, 2020 Report Share Posted June 21, 2020 being a lighter car than the TR range why do you need a special clutch , theres less slip time with less vehicle weight ??? Pete Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 21, 2020 Author Report Share Posted June 21, 2020 2 minutes ago, Pete Lewis said: being a lighter car than the TR range why do you need a special clutch , theres less slip time with less vehicle weight ??? Pete Hi Pete, It will slip if I really want it to from standstill. It has never ever slipped at other times. The gearbox is being removed from the car & I will have to change the clutch as I will be pissed if it ever has to come out again for clutch-related problems in my lifetime. Cheers, Iain, Link to comment Share on other sites More sharing options...
Nigel Clark Posted June 21, 2020 Report Share Posted June 21, 2020 3 minutes ago, Pete Lewis said: being a lighter car than the TR range why do you need a special clutch , theres less slip time with less vehicle weight ??? Pete In a little GT6, the torque of a 2.5 litre engine spins the rear tyres well before the clutch is likely to slip. Wonder how I know! Like Pete, I wouldn't be too worried about upgrading the clutch, Triumph's 8.5" diameter friction plate should be fine. It's the same size friction area for TR6 and GT6 plates, only the centre is different. I have a Borg & Beck branded clutch in my GT6 with an uprated 2500 saloon engine, and it seems well up to the job. If your clutch slips that easily from standstill with CP TR6 engine's torque, I would be questioning the quality of the clutch that was fitted, and whether it was fitted correctly or even contaminated with oil. The rear tyres should be smoking long before the clutch slips. Nigel Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 21, 2020 Author Report Share Posted June 21, 2020 Hi Nigel, I would not say it slips easy. The 3.27, Quaife & 215 tyres do not help.😀 I would rather the standard TR6 clutch package as the price is good. Cheers, Iain. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 22, 2020 Report Share Posted June 22, 2020 well while its out fit a heavy duty dowel bolt to the throwout /shaft , renowned for fracturing some clues on buckeye triumphs https://static1.squarespace.com/static/5c6dec53b10f25d4edf0b3f7/t/5d0194e7dd6f4f0001b1f36e/1560384744912/Clutch+Shaft.pdf Link to comment Share on other sites More sharing options...
Steve P Posted June 22, 2020 Report Share Posted June 22, 2020 Mine came from Larkspeed and the description looks exactly the same as your link.As to driving,i found no difference in pedal feel or town driving with the paddle plate. Also my Vitesse was rollered at 170Bhp,it never slipped on the old clutch,just wore out quickly. Steve Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 22, 2020 Author Report Share Posted June 22, 2020 Hi, The only pictures I have from 2010. All that I can say is it is 10 teeth! 1 Link to comment Share on other sites More sharing options...
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