RogerH Posted January 14, 2018 Author Report Share Posted January 14, 2018 That's OK tom. I don;t like heights - the sooner I get down the better. Roger Quote Link to post Share on other sites
stuart Posted January 14, 2018 Report Share Posted January 14, 2018 (edited) Hi Folks, yesterdays run out went OK. The engine felt good but on tick over it is a bit lumpy. This morning I checked the mixture as best I can with a colour tune and it did sort of what it should do. I'm no expert with the CT. So Q #1 - do these performance cams (Moss TT1104N road cam) make the tick over lumpy? Q #2 - if it shouldn't be lumpy what would cause the lumpiness.? Going out for another run this afternoon to see if things settle down. Roger In a word yes, if you have the tickover up at around 900 then its not so bad. Make sure you have the correct valve clearances too as that makes a world of difference, you may also find you get "run on" now Stuart. Edited January 14, 2018 by stuart Quote Link to post Share on other sites
RogerH Posted January 14, 2018 Author Report Share Posted January 14, 2018 Hi Stuart, Thanks for that. The Moss TT1104N Road cam is the next one up from the standard cam. I wouldn't have thought there would have been much difference but it does drive much more enthusiastically. It is ticking over at apprx 1500rpm and is not running on. Tomorrow I will take it all apart again and re-check the Moss setting up instructions - I may be a few degrees out Is the vernier sprocket worth having I shall double check the timing using John Davis's balanced tappets method as shown in the WSM - it worked well on the last cam. This should be quicker than last week as I know where all the problems are now. Roger Quote Link to post Share on other sites
Nigel C Posted January 15, 2018 Report Share Posted January 15, 2018 In my experience they do run lumpy under 1000. Mine ticks over at about 800-850 and rocks the car nicely! .......my neighbour in his workshop opposite starts doing the ol man samba to it Quote Link to post Share on other sites
RogerH Posted January 15, 2018 Author Report Share Posted January 15, 2018 Hi Nigel, is yours what they call a 'performance road cam ' or a 'loony power cam ' Roger Quote Link to post Share on other sites
Nigel C Posted January 15, 2018 Report Share Posted January 15, 2018 from memory it was just a fast road cam from C&B as it was then.....I didn't want anything to unmanageable in traffic etc Quote Link to post Share on other sites
Robin Powell Posted January 15, 2018 Report Share Posted January 15, 2018 Hi Roger I have a fast road cam in the 4A and I can get it to tick over smoothly at 800 rpm but your engine is newly rebuilt and is probabaly a bit tight which won't help. Quote Link to post Share on other sites
RogerH Posted January 16, 2018 Author Report Share Posted January 16, 2018 Hi Folks, thanks for all your comments. I shall be putting all back together this morning (for the second time in a week) and I'll see if I can calm it down. Perhaps a visit to a decent garage that can set all the clever bits is on the cards. Roger Quote Link to post Share on other sites
RogerH Posted January 16, 2018 Author Report Share Posted January 16, 2018 Hi Folks, the car is all back together. Tomorrow I'll turn the key The setting up instructions were followed to the letter this time and last time. As for the lumpy tick over I have been told that the carbs will need tuning to suit the new breathing etc. So assuming the engine starts I'll investigate a local tuning specialist to sort the mixture and timing. At least the knocking has gone. Roger Quote Link to post Share on other sites
Hamish Posted January 16, 2018 Report Share Posted January 16, 2018 Well done Roger. You have worked hard and perservered ive got my fingers crossed ???? but Im sure you have sorted it. Quote Link to post Share on other sites
RogerH Posted January 16, 2018 Author Report Share Posted January 16, 2018 Hi Hamish, I'm sure the main problem is sorted (duff cam). I now need to get the detailed tuning sorted. Hopefully it should then do all the things asked of it. Roger Quote Link to post Share on other sites
Hamish Posted January 16, 2018 Report Share Posted January 16, 2018 A lot of work and expense has resulted from a dodgy part. God know what the cost would have been if you couldnt do the work and it was via a commercial specialist !!! Quote Link to post Share on other sites
RogerH Posted January 16, 2018 Author Report Share Posted January 16, 2018 Hi Hamish, indeed the costs do mount up. Not sure why the cam failed I was only 2 years old - apprx 25,000 miles or so. Makes you wonder. The previous cam lasted apprx 10 years so about 100,000+ miles The originals ST cam did 89,000 miles before I had the car (I assume it was the original) I then put another 7 years (70,000 miles ) on it. They don't make cheese like they used to do. Roger Quote Link to post Share on other sites
RogerH Posted January 18, 2018 Author Report Share Posted January 18, 2018 Hi Folks, went for a long run today to see if the new cam is happy. It runs very well but as I mentioned above the tick over is quite lumpy. The front two pots were a little lean and the rear two a little rich. So have tweaked the main jets a little. It occurred to me on the run that I have not balanced the airflow going into the carbs. They were set up good before the change but the new cam may require it re-setting. So tomorrow I'll balance the intake and hope that helps a little. Roger Quote Link to post Share on other sites
RogerH Posted February 9, 2018 Author Report Share Posted February 9, 2018 (edited) Hi Folks, quite a gap form my last post. The tick over air flow balancing was a fair bit out. This was sorted but with no real improvement on the tickover. Have put a few miles on the new cam and it does run very well over 2000rpm BUT!!! the fuel consumption has gone haywire. From about 35mpg to about 25mpg. All I want is a decent quality standard cam for touring long distances. I was reading the technical spec for the Newman cams and they say that their PH1 gives a smooth tickover etc etc. So I took the plunge and now have another quality cam. I shall install this sometime this month. Because the Kent cam was badly machined (front spigot for the cam sprocket being 0.008" too big) I will need to purchase another new sprocket. Good fun. Roger Edited February 9, 2018 by RogerH Quote Link to post Share on other sites
peejay4A Posted February 9, 2018 Report Share Posted February 9, 2018 Newman PH1 in Eric and 35mpg is easily done on a run. Quote Link to post Share on other sites
Nigel A Posted February 9, 2018 Report Share Posted February 9, 2018 I opted for a PH1 cam, but have only done about 1000 miles but it is superb. Cheers Nigel Quote Link to post Share on other sites
RogerH Posted February 9, 2018 Author Report Share Posted February 9, 2018 Thanks for that. Very re-assuring. Roger Quote Link to post Share on other sites
Hamish Posted February 9, 2018 Report Share Posted February 9, 2018 Roger Are you finding the Kent road cam you used was too hot ? How does the Newman ph1 compare to it. Nice to have others using one successfully H Quote Link to post Share on other sites
Nigel A Posted February 9, 2018 Report Share Posted February 9, 2018 Hi Roger I cheated a bit and let Crown Classics carry out the work, they used a vernier pulley which I think was from Moss. See you Sunday at Stoneleigh Cheers Nigel Quote Link to post Share on other sites
RogerH Posted February 9, 2018 Author Report Share Posted February 9, 2018 (edited) Roger Are you finding the Kent road cam you used was too hot ? How does the Newman ph1 compare to it. Nice to have others using one successfully H Hi Hamish I haven;t fitted the Newman cam yet so do not know what it is like. The Kent TT1104N compared to the standard cam is very aggressive and it is just a 'Road' cam. It should be interesting to see what the Newman does. I am quite prepared to find it is something that I am doing wrong , but I can't see that at present. I'll probably swap them over next week - prepare for another saga.. Roger Edited February 9, 2018 by RogerH Quote Link to post Share on other sites
RogerH Posted February 9, 2018 Author Report Share Posted February 9, 2018 (edited) Hi Hamish, here are the numbers - TT1104N (851-051) is Valve Timing 31/67 67/31, lift .290", timed at 108 deg, duration 278 deg; Newman PH1 (similar to the Elgin 70-9 on this listing http://www.tildentechnologies.com/Cams/TriumphCams.html Valve timing 30/70 70/30 Cam lift 270 Timed at 110 Duration 280 and the Piper BP270 is 22/66 66/22 Valve lift .411" at the rocker arm duration 272 deg timed at 110. The Kent cam equivalent appears more aggressive than these two. Roger Edited March 6, 2018 by RogerH Quote Link to post Share on other sites
graeme Posted February 10, 2018 Report Share Posted February 10, 2018 (edited) Hi Roger Since early 2012 I have had a PH1 in my 4A, very satisfied with it after loosing two cams previously(similar damage to yours). I also fitted the Newman EN40B steel cam followers. The PH1 is smoother and gives more low down torque and I achieve 35 mpg on a run. I believe that the Kent cam is based on a Ford profile which is not really suited to a TR. Cheers Graeme Edited February 10, 2018 by graeme Quote Link to post Share on other sites
RogerH Posted February 10, 2018 Author Report Share Posted February 10, 2018 Hi Graeme, thanks for the info. When I spoke to Newman I mentioned about followers and that I had just fitted the TRiumphTune (Moss) lightweight followers and they said they would be fine. I'm now wondering if I should have gone for the chilled steel or 40B followers. I am using a 'new' moss head (installed at the same time as the previous cam, 2 years ago) and am now wondering what valve springs they have fitted. They are double springs but do not know the poundage etc. I would be happy with the lightest springs as I hardly do any revs. Roger Quote Link to post Share on other sites
Kiwifrog Posted February 10, 2018 Report Share Posted February 10, 2018 Roger I have a set or Revington uprated cam followers in my car which seem to work fine, standard Stanpart cam fitted, and have no problems. The followers look very much like the Moss triumphtune items https://www.revingtontr.com/product/rtr1024/name/follower-cam-phosphated-and-drilled-tr2-4a cheers Alan Quote Link to post Share on other sites
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