Tim D. Posted October 11, 2020 Report Share Posted October 11, 2020 hi all, I just fitted a smaller pulley to my supercharger meaning a jump from 4 to 7 psi boost. This means a lot more torque (and a lot of smiles). Only issue is now I think the clutch is slipping at full throttle in 3rd and 4th. Think I need a stronger clutch. Any suggestions, recommendations. Tim Quote Link to post Share on other sites
Andy Moltu Posted October 11, 2020 Report Share Posted October 11, 2020 Laycock cover and AP racing or Helix driven plate. Beware uprated clutch covers- they can be a recipe for an uncomfortable drive even if you have the legs of a mule. Quote Link to post Share on other sites
stuart Posted October 12, 2020 Report Share Posted October 12, 2020 12 hours ago, Tim D. said: hi all, I just fitted a smaller pulley to my supercharger meaning a jump from 4 to 7 psi boost. This means a lot more torque (and a lot of smiles). Only issue is now I think the clutch is slipping at full throttle in 3rd and 4th. Think I need a stronger clutch. Any suggestions, recommendations. Tim Talk to these guys they will uprate your present one correctly to suit your needs http://www.precisionclutch.co.uk/ Stuart. Quote Link to post Share on other sites
Tim D. Posted October 12, 2020 Author Report Share Posted October 12, 2020 Thx Stuart. I'll contact them. Will also look into the Laycock cover. Quote Link to post Share on other sites
Casar66 Posted October 12, 2020 Report Share Posted October 12, 2020 Try the Sachs 3082 100 142 Its for Saab 900 turbo. It is for stronger engines then standard PI. The "weaker" Sachs 141 works perfect in standard and mild tuned TRs, up to 170 PS I guess. Quote Link to post Share on other sites
Tim D. Posted October 13, 2020 Author Report Share Posted October 13, 2020 9 hours ago, Casar66 said: Try the Sachs 3082 100 142 Its for Saab 900 turbo. It is for stronger engines then standard PI. The "weaker" Sachs 141 works perfect in standard and mild tuned TRs, up to 170 PS I guess. Does it fit with the standard cover? Quote Link to post Share on other sites
JochemsTR Posted October 13, 2020 Report Share Posted October 13, 2020 3082 100 142 and 041 are clutch covers. For the plate you can use B&B as available @ Moss. I did lots of measurements on clutches... 142 requires 60% more force than 041 !! Jochem Quote Link to post Share on other sites
Casar66 Posted October 13, 2020 Report Share Posted October 13, 2020 Yes, normal size. I am using the 141 in my car with a B&B plate and a Toyota bearing. works perfect. An d I had lots of troubles in the past with my clutch. I know 142 I know from my time with a Saab 900 Turbo some years ago. In the Saab it worked nice, only just a little more power is needed. I guess (!) that you will need a stronger leg in the TR as well but not that much that only an athlete can use it. Quote Link to post Share on other sites
Z320 Posted October 13, 2020 Report Share Posted October 13, 2020 or a hydraulic release bearing with a 0.625" master Quote Link to post Share on other sites
Tim D. Posted October 13, 2020 Author Report Share Posted October 13, 2020 5 hours ago, JochemsTR said: 3082 100 142 and 041 are clutch covers. For the plate you can use B&B as available @ Moss. I did lots of measurements on clutches... 142 requires 60% more force than 041 !! Jochem Ok gotcha... Quote Link to post Share on other sites
Tim D. Posted December 20, 2020 Author Report Share Posted December 20, 2020 Hi all, Replaced the clutch with the one from the saab 900 turbo. Works great. No sign of slip. Pedal pressure is a tad increased but not difficult. Spring is also very non-linear, reducing significantly when the pedal is fully depressed. More pronounced than for the original borg and beck. Tim Quote Link to post Share on other sites
roy53 Posted December 20, 2020 Report Share Posted December 20, 2020 did you go for 041 or 142 for the cover ? clutch plate ? Quote Link to post Share on other sites
Tim D. Posted December 20, 2020 Author Report Share Posted December 20, 2020 (edited) 0142 with an AP friction plate Edited December 20, 2020 by Tim D. Quote Link to post Share on other sites
Casar66 Posted December 20, 2020 Report Share Posted December 20, 2020 Quote Link to post Share on other sites
TriumphV8 Posted December 20, 2020 Report Share Posted December 20, 2020 A good choice! We do so, too (similar Z320 recommendations) Slippery clutch is nasty! Quote Link to post Share on other sites
Tim D. Posted December 20, 2020 Author Report Share Posted December 20, 2020 Yes. Hadn't realised how much of an issue it was. Can seems a little more pushy now. Can really feel the torque when the supercharger kicks in. Quote Link to post Share on other sites
Z320 Posted December 20, 2020 Report Share Posted December 20, 2020 Use a 0.625" master, this lowers the force you have to step, I've been told it does not work but it does, believe it or not. Ciao, Marco Quote Link to post Share on other sites
Tim D. Posted December 20, 2020 Author Report Share Posted December 20, 2020 Interesting. Quote Link to post Share on other sites
astontr6 Posted December 27, 2020 Report Share Posted December 27, 2020 On 12/20/2020 at 7:01 PM, Z320 said: Use a 0.625" master, this lowers the force you have to step, I've been told it does not work but it does, believe it or not. Ciao, Marco It also often does not free off the friction plate enough and you get gear change crunching when you change gear. Clutch pedal linkage joints must have no large amounts of play in them? Bruce. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted December 27, 2020 Report Share Posted December 27, 2020 58 minutes ago, astontr6 said: It also often does not free off the friction plate enough and you get gear change crunching when you change gear. Clutch pedal linkage joints must have no large amounts of play in them? Bruce. Triumph approached this in the TR6 production by dropping the clutch m/c diameter from 3/4" (0.75") to 0.7" Peter W Quote Link to post Share on other sites
TriumphV8 Posted December 27, 2020 Report Share Posted December 27, 2020 There are so many systems in the market that you can not say this will work and that will not. First the diameter of the bearing has influence. The larger the diameter the more the spring ist compressed. Our hydraulic throwout has an individual working areas different from the normal 1" slave original. The harder the spring the more the original construction will suffer due to friction in several areas. So the centre lockout plays out its advantages especially with performance clutches. I had several master cylinder at hand and simply tried out what can be used that clutch will properly disengage. It was the 0.625" Quote Link to post Share on other sites
TriumphV8 Posted December 27, 2020 Report Share Posted December 27, 2020 (edited) Edited December 27, 2020 by TriumphV8 Quote Link to post Share on other sites
jr2 Posted December 27, 2020 Report Share Posted December 27, 2020 Please repost the original picture Quote Link to post Share on other sites
TriumphV8 Posted December 27, 2020 Report Share Posted December 27, 2020 1 hour ago, jr2 said: Please repost the original picture Quote Link to post Share on other sites
Z320 Posted December 28, 2020 Report Share Posted December 28, 2020 (edited) 14 hours ago, TriumphV8 said: First the diameter of the bearing has influence. The larger the diameter the more the spring ist compressed. Hi Andreas, please, I don't understand what you want to tell us with this? Ciao, Marco Edited December 28, 2020 by Z320 Quote Link to post Share on other sites
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