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> Mystery engine is out
Tdskip
post Mar 18 2020, 05:38 PM
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QUOTE(sixnotfour @ Mar 18 2020, 03:10 PM) *

Alot of thought/theory/work went into those heads.. (IMG:style_emoticons/default/popcorn[1].gif)


I don’t have an eye for good versus bad on 914 heads. Could these be reusable or would it be smarter to go with a more standard genuine Porsche to eat her head that’s been ported etc.?

My immediate thought is the more standard the better, and if that’s the case then what do I do with these besides turning it into giant paperweights?

Thanks for everyone’s eyes on this rather interesting build, hopefully the process of taking it apart to figure out what it is has been fun for other members here.
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Superhawk996
post Mar 18 2020, 05:40 PM
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That was awesome! Thanks for posting all the photos!
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jd74914
post Mar 19 2020, 01:18 AM
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QUOTE(Tdskip @ Mar 18 2020, 06:38 PM) *

I don’t have an eye for good versus bad on 914 heads. Cadiz be reusable or would it be smarter to go with a more standard genuine Porsche to eat her head that’s been ported etc.?

My immediate thought is the more standard the better, and if that’s the case then what do I do with these besides turning it into giant paperweights?

Thanks for everyone’s eyes on this rather interesting build, hopefully the process of taking it apart to figure out what it is has been fun for other members here.

This is very neat to see! Thanks for posting all of the pictures!

Its not really a matter of good vs. bad; these are very unique and made to work as a full engine combo. I would write off rebuilding this thing as a normal motor though. You’d be ahead of the game just working with something stock if standard is your goal. The cost here to change heads you be huge, everything has been made to work with different cylinders and likely there is a bunch more custom on the bottom end (besides the extra studs). It’s interesting to see they still used copper head gaskets. You might think with all of this work you’d see fire rings or something different.

I’m getting the distinct impression you just want to make a normal T4 out of this; that’s really be a shame since someone very clearly put hundreds of hours into building this thing. If that’s your goal I’d put it in some classifieds for trade of a more stock engine to build from. (IMG:style_emoticons/default/smile.gif)
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Mark Henry
post Mar 19 2020, 04:54 AM
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Hard to tell with the grime in the pic, are the cylinders biral or nickasil?
Inside cylinder, hard magnetic pull is biral, but very slight magnetic pull is nikasil.
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Tdskip
post Mar 19 2020, 06:49 AM
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QUOTE(jd74914 @ Mar 19 2020, 02:18 AM) *

This is very neat to see! Thanks for posting all of the pictures!

Its not really a matter of good vs. bad; these are very unique and made to work as a full engine combo. I would write off rebuilding this thing as a normal motor though. You’d be ahead of the game just working with something stock if standard is your goal. The cost here to change heads you be huge, everything has been made to work with different cylinders and likely there is a bunch more custom on the bottom end (besides the extra studs). It’s interesting to see they still used copper head gaskets. You might think with all of this work you’d see fire rings or something different.

I’m getting the distinct impression you just want to make a normal T4 out of this; that’s really be a shame since someone very clearly put hundreds of hours into building this thing. If that’s your goal I’d put it in some classifieds for trade of a more stock engine to build from. (IMG:style_emoticons/default/smile.gif)


Good morning - thanks for the detailed response.

I'm not really sure what I am going to do with this - mainly following up on a promise to pull it apart so we can collectively figure out what the heck it is. Think of it as 914 archeology. (IMG:style_emoticons/default/biggrin.gif)

To be fully transparent I am also using this to learn about custom engine builds and how it all has to come together. I've been itching to dig into an engine as it's one of the relatively few things I haven't done on the various vintage cars I've had.

My question about the heads mainly was oriented around using 2L heads as a starting point for a big bore build - the heads on this were kind of a paint to live with as they had weird spark plug angles and you had to pull the intake manifolds to remove the plugs (which made tune up and compression testing etc a certain amount of brain damage).

Good coaching however, and very much appreciated.
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Tdskip
post Mar 19 2020, 06:53 AM
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QUOTE(Mark Henry @ Mar 19 2020, 05:54 AM) *

Hard to tell with the grime in the pic, are the cylinders biral or nickasil?
Inside cylinder, hard magnetic pull is biral, but very slight magnetic pull is nikasil.


Good morning Mark - thanks for the expertise.

I got a hard magnetic pull, I tested with one of those dropped bolt magnetic wands and it firmly attached with strong pull.
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Tdskip
post Mar 19 2020, 09:53 AM
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Pistons off. You can still see the cross hatching in the bore, didn’t expect to see that.

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Tdskip
post Mar 19 2020, 09:54 AM
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Tdskip
post Mar 22 2020, 11:11 AM
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Anyone familiar with these wrist pins?

Happy Sunday all.

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Tdskip
post Mar 24 2020, 12:16 PM
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Huh - these just slide right out. Was not expecting that.

Pistons are stamped TRW.

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Tdskip
post Mar 24 2020, 01:42 PM
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Yikes! Looks like I had a three cylinder - the driver side front rocker assembly was totally loose.

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Jonathan Livesay
post Mar 24 2020, 03:26 PM
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QUOTE(Tdskip @ Mar 24 2020, 12:42 PM) *

Yikes! Looks like I had a three cylinder - the driver side front rocker assembly was totally loose.

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That's not good.
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mb911
post Mar 24 2020, 04:43 PM
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I so love this setup.. Someday I will build a type 4 turbo 914
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Tdskip
post Mar 24 2020, 08:02 PM
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Tdskip
post Mar 24 2020, 08:03 PM
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QUOTE(mb911 @ Mar 24 2020, 05:43 PM) *

I so love this setup.. Someday I will build a type 4 turbo 914


No no no Ben, you need to build a turbo 2.3l that was seemingly put together with a gallon of RTV. Then you’d be living...

Hope you are doing OK up there.
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mb911
post Mar 24 2020, 08:16 PM
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Things are ok here.. Feeling like I am legend at the moment..

Still think it would be fun to build that engine correctly
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Tdskip
post Mar 24 2020, 08:57 PM
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QUOTE(mb911 @ Mar 24 2020, 09:16 PM) *

Things are ok here.. Feeling like I am legend at the moment..

Still think it would be fun to build that engine correctly


@mb911 - I think I am going to tear it completely apart and then build it as a normally aspirated engine. External cooler oil cooler and sensible build - then plan to do it all over again in 30k?
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barefoot
post Mar 25 2020, 06:32 AM
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QUOTE(Tdskip @ Mar 24 2020, 02:16 PM) *

Huh - these just slide right out. Was not expecting that.

Pistons are stamped TRW.

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TRW made forged pistons for OEM V-8's back in the day, I'd used 11:1's for my Chevy small block build back then. Good stuff !!
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Tdskip
post Mar 25 2020, 07:19 AM
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@barefoot - thanks for the response and info. I'll put these in the "save" pile then.

Time to start getting into how this thing was set up, started a related thread on

Compression ratio

Thanks gentlemen.
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Tdskip
post Mar 25 2020, 09:46 AM
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Look at this weird welding on the center of the heads in between the exhaust manifold.

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