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...

I have a 75" G. Series with 103 miles on it.  Engine is strong but has pulled head studs - don't know whether to perservere, or fit a 3.0.  I am told it will only happen again.  Would like to keep it matching numbers - are there any bullet proof fixes for the case.  I know about time certs etc.

Cheers

Iain

Hi Ian - welcome to the forum.

Sorry to hear about your head studs.  Unfortunately this is a common problem and not one that is fixed foreveer.  It can happen again, but it might not.  If they are fitted properly and torqued up correctly there's every chance they will go on for ever.  I had a 2.7l engine with 150k miles on it and the studs were absolutely fine. 

If you are keeping the engine, then have it repaired and fit divlar.  If your not too worried, then retofit a bigger engine.  The 3.0 Carrera is a good engine, but still light on power.  You could take the plunge and go higher up the engine range.  A 3.2 Carerra engine will go straight in.  This will also give you the flixibility of engine management.  You could even go a step further and transplant a 3.6l engine from a 993.......

Please feel free to start a thread in Gallery>Our Readers 911.  Be nice to see some pictures of your car.

need to replace the alternator , any one have one for sale or guide me to a reasobnable seller

Paul, head yourself over to the DDK forums and post a 'wanted'. Someone will let you know if they have one or where to get for best price.
Its also a gold mine of info for an older 911 like yours.

Thanks

got one fronm Europarts in the end , new for £140

Paul

Quote: Paul Vidler at Oct 29, 2010 12:11:57 pm

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Thanks

got one fronm Europarts in the end , new for £140

Paul

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That's a good price Paul.  How's the rebuild going.  Any pictures to share?

Hi. Had my SC for 15 years and it's finally time to sort the stud problem. Engine out and top end stripped by local specialist (who is very good) but don't have cash to pay for the rebuild so am planning to do it myself (like many others on here). Where on earth do I start? Have got the 'book' already and '101 projects' too so now making plans on what to do next. Eeeek.  Specialist has check specs on crank, conrods etc and all looks good. Motor only has 66k on it from new with history so just about run in! Any pointers greatfully received. Thanks

Quote: Flat6 at Oct 31, 2010 10:47:25 pm

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Hi. Had my SC for 15 years and it's finally time to sort the stud problem. Engine out and top end stripped by local specialist (who is very good) but don't have cash to pay for the rebuild so am planning to do it myself (like many others on here). Where on earth do I start? Have got the 'book' already and '101 projects' too so now making plans on what to do next. Eeeek.  Specialist has check specs on crank, conrods etc and all looks good. Motor only has 66k on it from new with history so just about run in! Any pointers greatfully received. Thanks

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Hi Flat6 - Well, youve made the first big descision - "to do it yourself".  Now you just need to get organised and on your way.

-  Have you got "How to build 911 engines" from Wayne Dempsey.  Very good book.  I used it as a source when I was rebuilding mine.

- Are you keeping it standard or modifying along the way

- are you just doing the top end or everything?

Open up a thread on your car / engine and let's get planning.  Prep is everything 

Hey PAul - Hows the build going?  Any pics of the progress to share?