RMC590L Posted October 23, 2020 Share Posted October 23, 2020 Im looking to do a engine rebuild on my 1973 2000 2litre. I want to try and increase the power a bit without losing drivability. I have been looking into camshafts. One that i have been looking at is from a tr6. I have been told there are 2 different power engines in tr6's. The CR version at125bhp and the CP version at150bhp. Its been suggested to me that the cam from the lower powered CR engine will work in a 2 litre engine and do what im asking. Has anyone fitted a tr6 camshaft to a 2 litre? If someone has what was the results? I can get my engine number if needed. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Clive Posted October 23, 2020 Share Posted October 23, 2020 the 125 cam was used on some 2000 engines (certainly the very last GT6 and I guess saloons, as well as the 2500s) It is a very "soft" cam. So it is likely you either have this cam already, or will lose power. The best "factory" option is probably the cam used on the mk1 PI engine, also mk2 vitesse and GT6. But first find out what you have! Quote Link to comment Share on other sites More sharing options...
Clive Posted October 23, 2020 Share Posted October 23, 2020 the 125 cam was used on some 2000 engines (certainly the very last GT6 and I guess saloons, as well as the 2500s) It is a very "soft" cam. So it is likely you either have this cam already, or will lose power. The best "factory" option is probably the cam used on the mk1 PI engine, also mk2 vitesse and GT6. But first find out what you have! Quote Link to comment Share on other sites More sharing options...
RMC590L Posted October 24, 2020 Author Share Posted October 24, 2020 Ok thank you. I was assuming it hasent got this cam. I may well be wrong though. Im going by the tech sheet on chris witors website at the moment as i havent stripped my engine yet. Quote Link to comment Share on other sites More sharing options...
RobPearce Posted October 24, 2020 Share Posted October 24, 2020 Quoted from cliftyhanger- It is a very "soft" cam. So it is likely you either have this cam already, or will lose power. It's not that soft! If you put a properly soft cam in a 2.5 you end up with a 2500TC or S and only get 105, not 125! But yes, the early PI cam, which is the same as a Vitesse/GT6 Mk2, is a good option. Quote Link to comment Share on other sites More sharing options...
Clive Posted October 24, 2020 Share Posted October 24, 2020 The TR6 125 cam is 18 58 the same as the 2500S . Or so I have always thought, but looking at the Witor site looks like I have been mistaken for 27 years! But I stand by the mk2 vitesse cam being a lovely all-rounder. Although Witor does a hybrid cam that could be worth a look. Quote Link to comment Share on other sites More sharing options...
TRTOM2498 Posted October 30, 2020 Share Posted October 30, 2020 If you are planning rebuilding your 2l, have you thought about buying a 2.5l, and uprating that ? Matt George has a TR6 with a 2.5l with a Piper Yellow cam (unsure of cam timing/lift or duration), but been it works well on twin SU's. Cheers. Quote Link to comment Share on other sites More sharing options...
RMC590L Posted November 10, 2020 Author Share Posted November 10, 2020 I was hoping to keep it 2l but just try and improve torque and power a little. Quote Link to comment Share on other sites More sharing options...
TR20tc Posted February 26, 2021 Share Posted February 26, 2021 Quoted from cliftyhanger- The TR6 125 cam is 18 58 the same as the 2500S . Or so I have always thought, but looking at the Witor site looks like I have been mistaken for 27 years! But I stand by the mk2 vitesse cam being a lovely all-rounder. Although Witor does a hybrid cam that could be worth a look. no the 2500s cam is 10 50 Quote Link to comment Share on other sites More sharing options...
Guppy916 Posted June 2, 2021 Share Posted June 2, 2021 have a look here, I run a newman TR16/280/405, I have a mk3 GT6 with a 2.5 engine in http://www.newman-cams.com/wp-content/uploads/2021/02/TRIUMPH-CAMSHAFT-MANUFACTURING-PRICELIST-2021.pdf 2 Quote Link to comment Share on other sites More sharing options...
TimW Posted June 2, 2021 Share Posted June 2, 2021 I'd always recommend the Newman PH2 cam for a good all-rounder. Better than the Mk1 PI/Vitesse/mk2 GT6. This runs very well in both 2500 and 2000. I've always used Newman Cams with their followers. 1 Quote Link to comment Share on other sites More sharing options...
Spitfire6 Posted June 10, 2021 Share Posted June 10, 2021 Newman cams use a Fives Landis grinding machine. Many do. Ask for name of machine that grinds the Cam if it's not a "Fives Landis" avoid! Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted June 11, 2021 Share Posted June 11, 2021 11 hours ago, Spitfire6 said: Newman cams use a Fives Landis grinding machine. Many do. Ask for name of machine that grinds the Cam if it's not a "Fives Landis" avoid! Proper Yorkshire engineering... just up the road from us! :-) Quote Link to comment Share on other sites More sharing options...
JohnD Posted June 15, 2021 Share Posted June 15, 2021 I don't thnk that you will get that much improvement from any reasonable cam. But a 2.5L engine is a revelation in terms of mid range torque, even without any mods. Do that and you understand why Triumph never did it, in a car half a tonne lighter than the TR6! And it's easy to fit to the GT6, just use the OE sump and rear engne plate, and bash two grooves in the shallow floor of the sump to clear the Nos. 1 and 2 big ends. John Quote Link to comment Share on other sites More sharing options...
Spitfire6 Posted June 23, 2021 Share Posted June 23, 2021 On 11/06/2021 at 11:16, yorkshire_spam said: Proper Yorkshire engineering... just up the road from us! :-) Worked there on Software for a few years. The machines have no betters. precision at its best. 2 Quote Link to comment Share on other sites More sharing options...
Damson6 Posted June 24, 2021 Share Posted June 24, 2021 On 23/10/2020 at 21:32, RMC590L said: Im looking to do a engine rebuild on my 1973 2000 2litre. I want to try and increase the power a bit without losing drivability. I have been looking into camshafts. One that i have been looking at is from a tr6. I have been told there are 2 different power engines in tr6's. The CR version at125bhp and the CP version at150bhp. Its been suggested to me that the cam from the lower powered CR engine will work in a 2 litre engine and do what im asking. Has anyone fitted a tr6 camshaft to a 2 litre? If someone has what was the results? I can get my engine number if needed. Thanks in advance. If you buy new make sure its from a new blank and not reprofiled, I have had 2 Kents go soft after 10 to 15000 miles. I now buy Newmans and cant fault them. Quote Link to comment Share on other sites More sharing options...
TRTOM2498 Posted June 24, 2021 Share Posted June 24, 2021 If you buy a Newman cam, they are based on a new chill cast blank. Also consider their steel EN40 followers. You will not have any issues with this cam, providing it is installed correctly, and good quality oils are used and changed regularly. 2 Quote Link to comment Share on other sites More sharing options...
Spider Posted July 6, 2021 Share Posted July 6, 2021 On 24/10/2020 at 19:01, Clive said: But I stand by the mk2 vitesse cam being a lovely all-rounder. Although Witor does a hybrid cam that could be worth a look. I can vouch for the "hybrid" Witor cam in a 2.0. I think I would try the Newman cam next time I need one, for the quality and price I don't think you could do much better. Quote Link to comment Share on other sites More sharing options...
Gt6s Posted November 1, 2021 Share Posted November 1, 2021 On 26/02/2021 at 08:58, TR20tc said: no the 2500s cam is 10 50 No. Exactly the same three ring cam. Quote Link to comment Share on other sites More sharing options...
RobPearce Posted November 1, 2021 Share Posted November 1, 2021 38 minutes ago, Gt6s said: No. Exactly the same three ring cam. I believe you are mistaken and TR20tc is correct. There are three cam profiles for 2500 saloons - early PI, late PI and carb - the S (carb) one is the mildest of them. The PI cams are the same as the early/late Mk2/3 GT6 cams. The "three groove" is a TR6 camshaft, not fitted to saloons. Quote Link to comment Share on other sites More sharing options...
Gt6s Posted November 1, 2021 Share Posted November 1, 2021 Have pulled apart many an S engine ALL HAVE HAD 3 RING CAM. Quote Link to comment Share on other sites More sharing options...
RobPearce Posted November 2, 2021 Share Posted November 2, 2021 And yet none of the ones I've dismantled had such. Quote Link to comment Share on other sites More sharing options...
torque2me Posted November 17, 2023 Share Posted November 17, 2023 On 11/06/2021 at 11:16, yorkshire_spam said: Proper Yorkshire engineering... just up the road from us! 🙂 Confused with that comment. Clicking on the "Contact Us" of th Newman site says they are in Kent. Were they in Yorkshire (2021) and the moved? Kev Quote Link to comment Share on other sites More sharing options...
yorkshire_spam Posted November 17, 2023 Share Posted November 17, 2023 2 hours ago, torque2me said: Confused with that comment. Clicking on the "Contact Us" of th Newman site says they are in Kent. Were they in Yorkshire (2021) and the moved? Kev I really rate Newman cams even though they aren't in Yorkshire.... but Fives Landis are. 🙂 Quote Link to comment Share on other sites More sharing options...
Spitfire6 Posted November 17, 2023 Share Posted November 17, 2023 4 minutes ago, yorkshire_spam said: I really rate Newman cams even though they aren't in Yorkshire.... but Fives Landis are. 🙂 Fives make the best grinding machines in the world. Newman Cams purchased a Fives machine a few years ago. If you want the best grind. Cheers, Iain. Quote Link to comment Share on other sites More sharing options...
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