the engine has  given up after 235000 miles

1977 2,7S

If you were going to rebuild the engine what would you do to it to improve , not necessarily after mega hp but a bit more would be nice , more after smooth and tighter .

I will upgrade to Carrera Chain Tensioner and I have just had new injectors and fuel metering head done

Paul

Hi Paul -

A 2.7S, very nice.  Feel free to open a tread on your car in members gallery and share some pics and info.

Can you tell us a little more about the current condition of the engine.  What failed?  How it was behaving in the lead up to failure?

ARe you planning to keep your "S" standard or do you mind modifying a little?

what happened was the oil guage was not working , shorted , and was showing full , I now know better

It ran out of oils and developed a clater under load , I think it has spun a cap , anyway it went through 8 litres of oil in less than a 100 miles , so needed a rebuild anyway

I would like to modify a bit , I will certainly balance everything including the flywheel and have been advised to repfile the cams to SC spec , will upgrade to carrera tensioners , but any other suggestions most welcome , i think smoothness against outright speed would be prefable

Paul

Hi Paul -

The 'S' engines are very cammy.  The power seems to come later with not that much at the bottom end....

If you dont mind modifying an 'S'  engine then I guess there are a few things you could do:

- cams.  Not sure about SC cams.  I can see where thats comming from. No overlap and a big lop centre distance.  I would investigate a bit more though to make sure there would be no loss of power.  But a cam with that profile would certainly spread the power more evenly.  Maybe talk to someone like John abd DRC Camshafts in the states.  He is full of good advice and is always willing to help in choosing the right cam;

- ignition.  You could go twin spark.  This will improve the balance of the combustion across the piston face and more importantly will help reduce the amount of advance needed releasing more power;

- you could go for digital ignition, but I think thios is more for efficiency rather than anything else and doesnt come cheap anyways.

- crank case.  While your in there maybe gas flow the crank, hone and bore align and maybe shuffle pin.  The most important for me is to shuffle pin... 

Aside fromm all the normal stuff like balancing and polishing, new rings, new bearings etc I think thats as far as I would go......

What's your budget.  Are you doing it yourself? 

Pete

Thanks for the advise , you sure seem to know your stuff

i am having the engine done by Rob of Performance Engine Parts here in Essex and will discuss all when we meet this friday , he is a very knowledeable chap and has worked on F1 cars etc

I will discuss the twin spark but imagine quite a lt of work needs to be done to acheive that

Paul

No problem Paul.  Your very welcome.  Please keep us up to date with progress.

I got my experience from building my own car and engine.  They are fantastic engines to work on, but a bit on the technical side compared to other cars...