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 Post subject: Re: 944 S2 Repair
PostPosted: Sat Nov 26, 2016 11:53 am 
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Not happy about this seized balance shaft . There is no oil getting to the front of shaft yet after removing turbo oil feed pipe can see oil in the rest of housing . As this is the engine we rehoned the cylinder bores and are running the total seal rings we got nervous and have decided to pull the engine and inspect .
This does allow us to put together the other 16v engine as a replacement . The crankshaft is having the offset ground being carried out locally and hope to have that back this week as well as another inlet manifold i'm having made up .As this works out around 3.3 litres decided to uprate the intercooler and fit a slightly larger turbo . The intercooler I have found will allow me to clock the turbo and run the pipework as Tim has.
As for the lump of oil and soot that is supposed to be a turbo , its quite a large Holset . Not sure what model as it was sold as H1E but has the circlip rather vband and the inducer size is 83/54 which is making it look like a HX35 possibly . What is intresting is that it came with a vband non wastegated T3 exhaust housing that has the number 7 inside which equates to 7cm3 (.50a/r) ,should spool quickly !


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 Post subject: Re: 944 S2 Repair
PostPosted: Sun Nov 27, 2016 12:12 pm 
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I haven't got around to putting the parts I've collected over the years into one build yet, how many engines have you got/built, and I thought the Yanks favoured Chevy pistons for their offset ground projects. Supply of complete S2 heads seems to have dried up too.


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 Post subject: Re: 944 S2 Repair
PostPosted: Mon Nov 28, 2016 6:51 pm 
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Hi Pauly , my wife would say to many engines or cars come to that . I agree that some parts are not so available now which I believe is due to the values going up so not so many breakers .
The americans do favour the sbc pistons which I believe is to do with availability and price . These ford pistons use the same size .927 wrist pin and as long as the pin height and dish measurments are correct for the c/r they should work. I was after a piston to use with the 16v head and the symmetrical dish of this piston means no machining for valve reliefs is needed , I couldn't find that with a sbc piston.


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 Post subject: Re: 944 S2 Repair
PostPosted: Tue Nov 29, 2016 2:25 am 
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Hi,
Did you get the Augment setup running properly ?


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 Post subject: Re: 944 S2 Repair
PostPosted: Wed Dec 07, 2016 6:29 pm 
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pauly wrote:
Hi,
Did you get the Augment setup running properly ?


I've asked this question before and for some reason things go quiet...


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Dec 08, 2016 11:23 am 
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Sorry Pauly I missed your question. The Augment Automotive ecu is working well with the car set up as it is at the moment.
After initial problems with electrical fault at higher rpm's sorted by going wasted spark and then a lengthy delay due to tom's rolling road having a problem, the car is tuned to allow me to use it for some track days before going back for further tuning. The car is running 320 bhp on the wastegate spring (7psi) at the moment.
This was a brand new engine, so just want to get some miles on it first.


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Dec 08, 2016 8:22 pm 
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No worries, not aimed at you specifically it just seems like quite an outlay and I don't recall seeing any independent dyno results.


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Jan 12, 2017 8:05 pm 
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Turns out the turbine housing is bigger than I thought, just under the number seven you can just make out an 18. Some people say this equates to around 1.00ar and some say around 1.2ar either way it is a bit to big . Also gave it a clean.
So I purchased a turbine housing from turbolab in the states which is a .82ar single entry housing which bolts on to the hx35 and has a v band. The housing was still touching the mounting so I made two spacers , one to retain the o ring on the mount and the other the hx35 gasket . This raised it enough to clear the mount giving about 5mm clearance . There will not be a problem with the manifold as this is being built to suit the available space .
Got the crank back just waiting on the engine block to be returned after having the liners fitted so can start the build.


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 Post subject: Re: 944 S2 Repair
PostPosted: Sat Feb 25, 2017 4:22 pm 
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While I have been waiting for the return of the block after liners have been fitted had a go at fitting the intercooler .Started out cutting some vent holes in the front sheet metal but after offering up the intercooler , it would not fit past the radiator rails due to angle of the radiator, so out came the grinder to give a bit more space ! Works out very well with 3 inch outlets. Looking to fit a larger oil cooler along the bottem.
This should make engine changes easier as everything is bolt in, probably don't even need to raise the car just lower the engine on to the floor and as engines seem to be a service item with me...


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 Post subject: Re: 944 S2 Repair
PostPosted: Sun Feb 26, 2017 3:38 pm 
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Whose fitting the liners and what do they charge ?


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 Post subject: Re: 944 S2 Repair
PostPosted: Sat Mar 04, 2017 4:11 pm 
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Hi Pauly , I use a AIK , Newgate Lane , Fareham . Ian is a one man band who is retired but works four days a week to keep busy mostly on pre war aston martin engines . He fitted the last lot of liners I had fitted for around £800, these are flanged liners . He cant be rushed and its ready when its ready .

I have test fitted the oil cooler to check it will all fit . Originally I was to use a very large Setrab cooler I have but I could not get it to fit without cutting away a lot of sheet metal and the other option of a RX7 copy oil cooler from china did not appeal . So I have fitted a cooler from a P38 4.6L Range Rover , it fits in very snuggly with out cutting out to much airflow to intercooler /rad. Rough measurement are 600mm x 150mm . Being a builder I had some box section aluminium from a conservatory which I cut up to make some brackets allowing the use of existing bolt holes .


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 Post subject: Re: 944 S2 Repair
PostPosted: Sat Mar 04, 2017 8:50 pm 
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sgl1966 wrote:
Hi Pauly , I use a AIK , Newgate Lane , Fareham . Ian is a one man band who is retired but works four days a week to keep busy mostly on pre war aston martin engines . He fitted the last lot of liners I had fitted for around £800, these are flanged liners . He cant be rushed and its ready when its ready .


Did the £800 include the supply, fitting and final machining/honing of the liners ? Ta


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Mar 30, 2017 12:25 pm 
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Hi Pauly, only just seen your question , but yes from memory all included , can confirm that when I get handed the invoice for these liner installation.

On that subject , I have had a small problem . Ian phoned to say there was a crack in the block as can be seen in the photos , which he fortunately found before starting to install the liners as I had missed it . As I don't have any more 2.5 blocks only a couple of 3 litre ones , I have had to have the liners installed in one of those. This does save me having to fill the water passages with engine grout even though this has just arrived from the states along with a 105mm cometic head gasket which is now surplus to requirements .
This also means I can not use the 2.5 16v head I had refurbished with new guides and valves and seats recut in preparation and will have to get one of the s2 ones redone. On the plus side , I got £20.49 weighing in the scrap block !

If any one is after a 2.5 16v head which is like new, I have just listed on ebay.


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Mar 30, 2017 2:43 pm 
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That's an odd place for the block to crack in normal use. Did it have a blow up or run without balance shafts ?


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 Post subject: Re: 944 S2 Repair
PostPosted: Thu Mar 30, 2017 3:26 pm 
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Yes , very strange . The rest of the engine was in very good condition with excellent crank condition and no sign of accident damage , even the bores were good . There is no real pressure at this point as far as I can see as it is at the top of the crank cradle stud recess . Still the crack was there and the engine is no more.


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