Hugh

Ok I've pulled my head off with suspected valve seat recession as I keep having to adjust the valves....about every 300 miles. What am I looking for to confirm? One exhaust valve is very white and one a little bit(1&2)the others are black. This seems to indicate a lean mixture from the front carburetter. I can push number one down easily and pull the valve about with one hand. This indicates a weak valve spring and a worn valve guide. I've also found that one of the followers is very pitted and more than one other has little indents in the edges so not fully circular.....is this normal? None of this is normal. The pitted flollower has probably gone through the hard facing and will have to be renewed in all liklihood the camshaft has also been damaged and should be renewed. What else can/should I be checking? oh and cant spend loads of money so should I just whack on the replacement head and plead ignorant? If you already have the replacement head; I think you would be well advised to look to the camshaft and followers.                                                                  All the best,                                                                  Paul Now that's what you call helpful info the sort this club is best at well done  ;) (clap)

1381 wrote:I love the simplicity of carburetters but let's face it, old fashioned tech like contact breaker points or SU carbs are easy to work on and adjust for a reason - because they never bloody stay in tune for long! Fuel injection was around back before the post-war incarnation of Triumph even existed, used in F1 cars by the early 60's, and EFI was around in the 1970s. So it's not sacrelidge in my book to give a 78 Spitfire the fuel injection it probably would've had, if strike loving workers and naff management hadn't pissed BL's investment budget down the toilet. Used on BF ME109 over Britain 1940'S  ;)

Alex wrote:They do appear to be deeper on one and two by about half the thickness?.... Hopefully some one will soon answer your question and might give you a bit more to go on and give you more help by telling you or has a photo I am sorry I can't help you I wish I could; :) James try and be a bit more helpful and explain as it is not always so clear to everyone what to look for as it clearly is so easy for you to spot a problem. :B

Or you could fit an original Triumph Pi system of course it too has it.s ( EFI) critics and I have to say Tim's car with all the work he has done on the engine is a fantastic motor. He will be the first to say that the EFI system he has fitted gives great results and I can say his car is not easy to stay with even in an Audi TSFi 210bhp Quattro  ;D but he has doen a lot of work to his engine.  ;) But Tim will tell you he has done what he is done to his car to achieve a very fast road/track day car and he has got such a car and I take my hat off to him  :) ;) As for fitting EFI on your car you may feel like others you just want to see triple webbers under the bonnet and listen to the fantastic induction roar they give. The only down side I can hear with EFI is a muted induction noise  :-/ But you should take advice from some of the chaps on here a lot of them have a great deal of good advice to give you. But listen less so to the zealous people who will try and scare you with over inflated costs of fitting webber carbs. They are not easy things to setup right but once done they are the dogs for a sweet induction noise and do give the best from a well sorted engine. As for MPG come on if MPG is such a major thing for owners of old cars then get rid and buy something modern sad if MPG worries you so much in driving your classic car. The last thing that you should be looking at on a fantastic run out on a stunning road with great views is your blooming petrol gauge ;D These people will always push EFI as they have built their whole thing on EFI and push everything a side that is not EFI. But just remember it's your car your money and your life and you need to do and live it the way that makes you happy with your car  ;) Oh and if you have the money to spare then spend it how you want not how others would want you to :) Now just read the replies to my reply  ;) and make your own mind up you will get great help on this forum for which ever way you go on your car. ;) Me well I now have a Pi setup for my car but I also now have a set some Italian webber/dellorto carbs  :o not sure what will end up on my car but the carbs are less work to fit but require a bit more once fitted :-/ Just look at the picture below I took at Prescott of a Vitesse fitted with such carbs what a sight hey.

Okay TR5 cam it is then ;)

Okay TR5 cam it is then ;)

So would this cam work with triple carbs instead of pi just a thought :-/

So would this cam work with triple carbs instead of pi just a thought :-/

lagerzok wrote:Hugh - forget the TH7 - it just won't work on a 2.5 - Hi Andy but why do you say it will not work the guy selling it had it in his 2.5 and Kent make it for the TR6 engine  :-/

lagerzok wrote:Hugh - forget the TH7 - it just won't work on a 2.5 - Hi Andy but why do you say it will not work the guy selling it had it in his 2.5 and Kent make it for the TR6 engine  :-/

I can buy an adjustable cam sprocket gear to go with this cam so I could retard the cam some what will this help. :-/

I can buy an adjustable cam sprocket gear to go with this cam so I could retard the cam some what will this help. :-/

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 ;)

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 ;)

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.