Hugh Posted May 28, 2012 Share Posted May 28, 2012 Can some one please tell me what if any ID numbers or letters are to be found on an original TR5 camshaft also is a GT6 MKII camshaft a better option than a GT6MKIII camshaft :)Thanks Hugh :) Link to comment Share on other sites More sharing options...
Royboy66 Posted May 28, 2012 Share Posted May 28, 2012 GT6 mkII cam is in my engine mate, No is 308778 , yeah I think better than mk111.http://www.mintylamb.co.uk/wordpress/?page_id=12# http://t2000.kvaleberg.org/t_tune.html#camshaftsome reading for you ;) Link to comment Share on other sites More sharing options...
Nick Jones Posted May 28, 2012 Share Posted May 28, 2012 GT6 Mk2 / Vitesse Mk2 / Mk1+ Early Mk2 PI 132 bhp has the number "308778" etched on it. Also has a 1 wide groove machined in the diameter behind the sprocket mount face. It is a better cam than the Mk3 GT6 one. It is not the limiting factor in the mk 2 engine - I think Steve Attenborough holds the record with upper 140s bhp with that cam in a 2L......The TR5 / Early TR6 cam has p/no. 307689. I've never seen one so I'm not sure if they also have the number etched on them. They should have two slim rings machined in the diameter behind the sprocket mount face. You'll be lucky to find a real one - Newman do something similar (though not identical apparently) if asked.Some info here http://www.chriswitor.co.uk/cw_technical/camshaft_applications.pdfNickToo slow...... Roy beat me..... Link to comment Share on other sites More sharing options...
Royboy66 Posted May 28, 2012 Share Posted May 28, 2012 Nick_Jones wrote:Too slow...... Roy beat me.....I never touched him Guv ! ;D ;) Difference is I looked it up....All that Nick wrote is in his head ! :B :) Link to comment Share on other sites More sharing options...
Hugh Posted May 28, 2012 Author Share Posted May 28, 2012 ;D ;D thanks chaps ;) Link to comment Share on other sites More sharing options...
Hugh Posted May 29, 2012 Author Share Posted May 29, 2012 Okay I can lay my hands on a GT6 MKII camshaft for £60 or an original TR5 for £150 which is the best one to go for price/performance wise any ideas welcomed :) Link to comment Share on other sites More sharing options...
andy thompson Posted May 29, 2012 Share Posted May 29, 2012 I would go TR5 - perfect for a 2.5 lump in a GT6 - might be a bit peakier in a 2 litre but in 2.5 should have bags of torque - assume you are still going Lucas PI - K Raven Smith can calibrate a MU for 100 quid.Worth checking the cam hasn't been reground - I bought a SH TR5 cam and some goon had ground a late 125 profile on it :-( Link to comment Share on other sites More sharing options...
Hugh Posted May 29, 2012 Author Share Posted May 29, 2012 lagerzok wrote:I would go TR5 - perfect for a 2.5 lump in a GT6 - might be a bit peakier in a 2 litre but in 2.5 should have bags of torque - assume you are still going Lucas PI - K Raven Smith can calibrate a MU for 100 quid.Worth checking the cam hasn't been reground - I bought a SH TR5 cam and some goon had ground a late 125 profile on it :-(Thanks Andy profile is original and is going in 2.5 lump still going Lucas PI Cheers Hugh ;) Link to comment Share on other sites More sharing options...
andy thompson Posted May 29, 2012 Share Posted May 29, 2012 Should fly - hope your transmission is up to it!! Link to comment Share on other sites More sharing options...
TimW Posted May 29, 2012 Share Posted May 29, 2012 908 wrote:Okay I can lay my hands on a GT6 MKII camshaft for £60 or an original TR5 for £150 which is the best one to go for price/performance wise any ideas welcomed :)HughYou can buy a new cast blank TR5 profile cam for less than £150. I wouldn't bother with used unless it's cheap!! Link to comment Share on other sites More sharing options...
Gt6s Posted May 29, 2012 Share Posted May 29, 2012 339 wrote:HughYou can buy a new cast blank TR5 profile cam for less than £150. I wouldn't bother with used unless it's cheap!!And do'nt forget you will need a NEW set of GOOD QUALITY followers. unless the used cam comes with matching individually numbered ones in top condition. Link to comment Share on other sites More sharing options...
Nick Jones Posted May 29, 2012 Share Posted May 29, 2012 Don't think even matched, numbered followers will really work unless it's all going back in the same block...... No reason they'll sit in the same relative positions.Just been pondering this on mine, tried lapping the followers but some turned out to be fairly dished anyway although they looked ok.Nick Link to comment Share on other sites More sharing options...
Gt6s Posted May 29, 2012 Share Posted May 29, 2012 Nick_Jones wrote:Don't think even matched, numbered followers will really work unless it's all going back in the same block...... No reason they'll sit in the same relative positions.Just been pondering this on mine, tried lapping the followers but some turned out to be fairly dished anyway although they looked ok.NickCorrect just testing. not to say I have not done that.It's okay I remember being wrong once before. Link to comment Share on other sites More sharing options...
Hugh Posted May 29, 2012 Author Share Posted May 29, 2012 Okay how about a Kentcam KCTH7 would this be a good one to use :) Link to comment Share on other sites More sharing options...
Gt6s Posted May 29, 2012 Share Posted May 29, 2012 908 wrote:Okay how about a Kentcam KCTH7 would this be a good one to use :)TH7 !You are planing to fit a race cam to an otherwise stock 2.5 ? Link to comment Share on other sites More sharing options...
Hugh Posted May 29, 2012 Author Share Posted May 29, 2012 Gt6s wrote:TH7 !You are planing to fit a race cam to an otherwise stock 2.5 ?Well I thought if I started with this one I could upgrade the engine bit by bit or is this cam too much for a stock engine if so why do you think so. Link to comment Share on other sites More sharing options...
thebrookster Posted May 29, 2012 Share Posted May 29, 2012 I know little about cams really, this is a subject area I need extensive research into, however...........Am I right in thinking it is possible to alter the cam timing (retard?) in order to gain extra torques at the expense of peak horsepower?? And if so, if Hugh went for this cam could he do this whilst waiting for other stuff to be done and so gain a drivable engine?A wee caveat to that, I am assuming compression will have to be increased before this is possible?? Stock compression not being enough?Cheers,Phil Link to comment Share on other sites More sharing options...
Nick Moore Posted May 30, 2012 Share Posted May 30, 2012 My 2.5L GT is getting a TR5 camshaft. That grind has a good reputation, and I'm chasing torque more than horsepower anyway. 150 pounds new from Newman Cams. Link to comment Share on other sites More sharing options...
Hugh Posted May 30, 2012 Author Share Posted May 30, 2012 Nick_Moore wrote:My 2.5L GT is getting a TR5 camshaft. That grind has a good reputation, and I'm chasing torque more than horsepower anyway. 150 pounds new from Newman Cams.Thanks Nick ;) Link to comment Share on other sites More sharing options...
thescrapman Posted May 30, 2012 Share Posted May 30, 2012 908 wrote:Okay how about a Kentcam KCTH7 would this be a good one to use :)HughIf going for PI, get a cam designed for PI.MikeyB has a Kent TH something in his PI.The fuel ecconomy is so poor he has retired it temporarily. They don't generate enough vacuum I think.Now if you are going for EFI, then yes, as you can program it to allow for the fuelling.Also a TH7 may give you a rev-band above the sane levels for a 2.5.CheersColin Link to comment Share on other sites More sharing options...
thescrapman Posted May 30, 2012 Share Posted May 30, 2012 Nick_Moore wrote:My 2.5L GT is getting a TR5 camshaft. That grind has a good reputation, and I'm chasing torque more than horsepower anyway. 150 pounds new from Newman Cams.Did you order the matched followers as well??CheersColin Link to comment Share on other sites More sharing options...
Nick Moore Posted May 31, 2012 Share Posted May 31, 2012 I ordered 'uprated' followers from Rimmers. Fingers crossed that they don't eat the cam lobes. Alternatively I might get the original followers resurfaced if they're still OK. I'll dig them out tonight and check. Link to comment Share on other sites More sharing options...
andy thompson Posted May 31, 2012 Share Posted May 31, 2012 I've seen some of those Rimmers uprated followers - bored out (to lighten??) and tufrided - distorted oversized didn't fit in the holes - hope yours are better - Newman do nitrided steel ones as uprated - fit beautifully Link to comment Share on other sites More sharing options...
TRTOM2498 Posted May 31, 2012 Share Posted May 31, 2012 Agree with Andy. I run a Newman cam with their steel followers. No issues what so ever.X7 track days, regular 6500rpm and 15k miles so far with no noises or cam issues.Cheers Link to comment Share on other sites More sharing options...
Hugh Posted June 1, 2012 Author Share Posted June 1, 2012 I can buy an adjustable cam sprocket gear to go with this cam so I could retard the cam some what will this help. :-/ Link to comment Share on other sites More sharing options...
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