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The 3.6 Engine Conversion Banter Thread


jevvy

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If anyone is considering a 3.6 conversion then I can now safely say with 200 miles of experience under my belt you will not be disappointed. Fitting this engine into a 1000kg ish IB would make one hell of a track day or road car weapon.

Thanks again Jev

Nice to hear its back on the road and providing some smiles - has yr youth been in it yet?

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I have read that doing the banana arm bushes is a v good idea with the engine out - struggling to find info via the search function for some reason, as I know that others have discussed it / done it on their IBs.

 

could anyone point in the direction of some decent pics or more info please.

 

also - are there the right superpro bushes?

http://www.type911shop.co.uk/shop/article_2944/911-1964-89-Rear-Trailing-Arm-Bush-Set.html?sessid=PUNkIN2vM4wKGezEYQYVFSx5PkAGu95Ju4CHKskQgsxRlZStly6kusPysPOFsFRG&shop_param=cid%3D539%26aid%3D2944%26

do I need anything else to refit these, do they come with steel inserts?

 

I'm very aware of not embracing the 'while you are in there' fever! but some things make sense to do now

 

thanks in advance :)

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I bought the bushes... Then never did it because I wanted it back on the road BUT it is a good idea to at least loosen the nuts & bolts off then re-torque while you have good access.

 

I think it is possible with the engine & box back it the car but a lot trickier to get access to them especially if you've got anything seized.

 

I may be wrong though.

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My belief is that it's a living nightmare job to do even with the engine out - I ended up paying someone to do it 2 years after I bought them because that was the next time the engine was out. I think it's possible with the engine in - if you only installed them 2 minutes beforehand.

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I did them on my SC years ago with the engine in place, It depends which way round the bolts/nuts and washers have been assembled, from memory, if the bolt heads are on the inboard side you can't get the bolts out.

 

Mine were on the outboard side so I undid them without any issue and took the arms off as I was also doing a duff rear bearing.

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The problem for me when I tried it with the engine in is that if you can't get the car high enough you can't get enough purchase on the (IIRC) 22mm bolt. The next step would be heat but if you start down that road you quickly pass the point of no return as you'll melt the rubber bush inside.

 

When I spoke to the garage after they had done the job (engine out) they said it was a bitch of a job to do.

 

Obviously they are all different though. When I had them replaced I went to elephant racing monoballs

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I tried and gave up with the engine in situ, just couldn't get enough purchase on the bolt and I was either going to end up damaging the bolts or me. They can wait until the engine is out.

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Right socket and spanner with engine in place, but long breaker bar is a must. As said above though if bolts are round the wrong way you would have to cut bolts. Good luck baz

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  • 5 months later...

So so tempting...what would it cost me ontop to have it fitted and running though?

Hi Mark,

I've got a running total spreadsheet going on my 3.6 build which I was going to post at a later date, but I'm happy to email you a copy if you would like a good idea of realistic costs for where I'm up to now.

Let me know if you do :)

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I saw that and just thought scam but the guy has got got feedback even if the advert is rubbish.

 

Photos look familiar too. Yet another 60 -70k mile engine :rlol:

 

Cheap enough to be worth having a look if you're in the market, also selling 15" Fuchs http://www.ebay.co.uk/itm/911rs-7-15s-wheels-2x-/290951058718?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43be08d51e

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. Yet another 60 -70k mile engine]

Think those cars must have been cursed around that mileage!

The cars seem to disintegrate around the perfectly healthy and untouched engine every time :)

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Think those cars must have been cursed around that mileage!

The cars seem to disintegrate around the perfectly healthy and untouched engine every time :)

 

Yup - like I said the story must stack up otherwise the risk starts to head towards the unacceptable zone :)

 

Ben you might want to hold off buying 15's until you work out what yr going to do about bigger brakes ;)

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I've got Baxter front calipers (But no 3,6 yet!) Or you could go to nick moss' 6-pots

 

yup yr right there are some caliper solutions that fit but 15's can limits disc size which is where the bigger gains are to be had.

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I saw that and just thought scam but the guy has got got feedback even if the advert is rubbish.

 

Photos look familiar too. Yet another 60 -70k mile engine :rlol:

 

Cheap enough to be worth having a look if you're in the market, also selling 15" Fuchs http://www.ebay.co.uk/itm/911rs-7-15s-wheels-2x-/290951058718?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43be08d51e

Look at that tinware. That will all be shot. theres a grand worth(second hand) of tinware to replace as it is!

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Dunno about a grand secondhand but the tin does look pretty tired. You buy f/g tin for £400 or thereabouts to replace it. Can't see any exhaust but I'd assume it would be shot along with heat exchangers. No mention of ECU or loom. Missing vacuum pipes. There's quite a bit of corrosion on the ally inlets so it must have seen quite a lot of moisture. Actually looks like it has been stored in a leaky old barn!!

 

If it's not a scam then maybe it would be worth a punt (for a cheeky offer) as a potential rebuild project but I'd be surprised if anyone paid full money for that.

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Are there any specialists out there, that offer a package for this kind of work (eg. Source a decent 964 or 993 engine, and then complete work for you, as a complete package). Would be interested to know what kind of money this would be.

 

Dave

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  • 3 weeks later...
  • 2 weeks later...

As there is some debate about the weight of a 3.6 I decided to check my own engine.

 

Weighing a 993 engine.

 

I had two main challenges to overcome; the old bathroom scales I use in the garage only go up to 120kg and the expected weight of the engine is somewhere around 200kg; I needed some way of lifting the engine single handed without a hoist.

 

The solution I came up with was to use a length of wood placed centrally under the engine, with one end resting on the scales via some blocks of wood and the other end on a trolley jack. Jacking up one end of the wood to lift the engine off its rest should give a usable reading on the scales.

 

IMAG0648_zpsb7779e16.jpg

 

IMAG0647_zpsb3ea93d1.jpg

 

IMAG0650_zpsfcd0e1bc-1.jpg

 

If I can remember my School physics correctly, placing the weight in the middle of a lever should split the weight evenly between both ends of the lever.

 

Maybe not that accurate, but it should give a good "ball park" number.

 

I did make an effort to verify the result accuracy using the clutch assembly kit which I have not yet installed. I weighed the box of bits on some digital scales (with a result of 6.8Kg) and then placing it on top of the engine and noted the increase in reading (which was 4Kg).

 

IMAG0649_zps3b62b1ed-1.jpg

 

This result would indicate that the weight was reading high by around 17%, but the check needed to be with a higher proportion of the total weight to claim real significance and so I repeated the exercise with a bag of builder's sand.

 

IMAG0654_zpsaced98fe-1.jpg

 

The bag of sand weighed 24.4kg on the digital scales and increased the engine weight reading by 14Kg. This calculates out at an over reading of 14.7% and so I feel it is safe to say the results are at least 10% high.

 

The engine is complete and ready to install onto a 915 box, with all necessary ancillaries, but without the clutch and without any rear silencer box.

 

The reading was 91Kg, giving a weight of 182Kg which is probably over by 10% giving 164Kg, or 171Kg including clutch.

 

IMAG0646_zps7bec66bc-1.jpg

 

I am not sure a stock earlier IB engine would be any lighter and comparison to a modified engine would need to be on a like-for-like basis.

Edited by SilverWT
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Mark, that's hilarious. Good work mate.

 

Now Bens engine is back in the car hopefully he will be up & running soon & it will be interesting to get it on the weigh bridge for a quick before & after.

 

If it's a few kg either way then so be it but it's the torque and power to weight ratio that makes it come alive.

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