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> 2.7 case guru, save/scrap
930cabman
post Feb 20 2021, 07:41 AM
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We are attempting fitting a 2.7 into our 1974 rustout hulk but have come across another hurtle. I have had a 2.7 kicking around for awhile and "assumed" we could go through it with new bearings/rings/..... and have a nice power plant. Not so quick there. The head stud issue is well known and I recently found when the magnesium cases are disassembled the crankshaft bores no longer return to a round/aligned condition.

I want to believe someone out there can get these magnesium cases in serviceable condition with good crank bores and good head stud bores.

thanks
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brant
post Feb 20 2021, 09:06 AM
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The machine work on a mag case adds 3k to the rebuild over an aluminum case

Thus should be calculated into the comparison to a 3.0/3.2 motor
Lots of places can do this work
But machine work is a paid skill
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930cabman
post Feb 20 2021, 01:38 PM
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QUOTE(brant @ Feb 20 2021, 10:06 AM) *

The machine work on a mag case adds 3k to the rebuild over an aluminum case

Thus should be calculated into the comparison to a 3.0/3.2 motor
Lots of places can do this work
But machine work is a paid skill


Exactly, why would we invest in a magnesium case when a 3.0 aluminum case appears more durable. Anybody have an extra 3.0 case in their back pocket.
thanks always
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mepstein
post Feb 20 2021, 03:30 PM
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QUOTE(930cabman @ Feb 20 2021, 02:38 PM) *

QUOTE(brant @ Feb 20 2021, 10:06 AM) *

The machine work on a mag case adds 3k to the rebuild over an aluminum case

Thus should be calculated into the comparison to a 3.0/3.2 motor
Lots of places can do this work
But machine work is a paid skill


Exactly, why would we invest in a magnesium case when a 3.0 aluminum case appears more durable. Anybody have an extra 3.0 case in their back pocket.
thanks always


For me, once you add in the durability, power, fuel injection and final cost, the 3.2 makes sense. That doesn't mean it's the best. It just checks a lot of my wishes.

I still want an engine builder friend of mine to build me an aluminum case 2.0 hotrod that will rev to 8K+ and make glorious sounds. Just because.
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horizontally-opposed
post Feb 21 2021, 02:28 PM
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QUOTE(mepstein @ Feb 20 2021, 01:30 PM) *


For me, once you add in the durability, power, fuel injection and final cost, the 3.2 makes sense. That doesn't mean it's the best. It just checks a lot of my wishes.


Can't argue with it, and mine would be a 3.2-based 3.4 with Motronic if building a 914-6 GT…

QUOTE(mepstein @ Feb 20 2021, 01:30 PM) *


I still want an engine builder friend of mine to build me an aluminum case 2.0 hotrod that will rev to 8K+ and make glorious sounds. Just because.


But this isn't far off from my dream for a narrow six-cyl 914: a mag-case 2.2S with MFI that revs to 8000 rpm backed up by short gears for 2/3/4 and a cruiser 5th.

QUOTE(Superhawk996 @ Feb 21 2021, 09:44 AM) *

In the grand scheme of maching up mag cases, $6500 for a completely new casting CNC machined, would be sort of "resonable". Still wouldn't be Mag which would be sort of a downer for me but I get it. Hardly anyone casting Mag these days.


Not sure about price, but machined mag case got FIA approval for early 911 race cars—and startup doesn't look too far off.

https://www.early911sregistry.org/forums/sh...c-Racing/page20


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Posts in this topic
930cabman   2.7 case guru   Feb 20 2021, 07:41 AM
gereed75   There are several places that do this. Ollie’s ...   Feb 20 2021, 08:00 AM
Luke M   We are attempting fitting a 2.7 into our 1974 rus...   Feb 20 2021, 08:17 AM
mate914   Your close to a lot of engine builders. Karl Hens ...   Feb 20 2021, 09:06 AM
brant   The machine work on a mag case adds 3k to the rebu...   Feb 20 2021, 09:06 AM
930cabman   The machine work on a mag case adds 3k to the reb...   Feb 20 2021, 01:38 PM
Superhawk996   Exactly, why would we invest in a magnesium case...   Feb 20 2021, 02:10 PM
mepstein   The machine work on a mag case adds 3k to the re...   Feb 20 2021, 03:30 PM
horizontally-opposed   For me, once you add in the durability, power, f...   Feb 21 2021, 02:28 PM
mepstein   Yea, unfortunately that’s the truth. Especially ...   Feb 20 2021, 09:29 AM
Superhawk996   Had all my 2.4L case work done by Ollies. All p...   Feb 20 2021, 10:30 AM
mb911   Had all my 2.4L case work done by Ollies. All ...   Feb 20 2021, 10:46 AM
sixnotfour   Has to be torqued together with the nose bearing...   Feb 20 2021, 12:06 PM
sixnotfour   I have a small main bearing 3.0 case 6k..... Care...   Feb 20 2021, 03:25 PM
914forme   You can always find another 2.2, 2.4, and 2.7L fro...   Feb 20 2021, 04:22 PM
930cabman   You can always find another 2.2, 2.4, and 2.7L fr...   Feb 20 2021, 05:11 PM
gereed75   Sorry that you had bad luck with the first and sec...   Feb 20 2021, 08:52 PM
davehg   My Ollie’s bill was closer to $4k for my 2....   Feb 20 2021, 10:12 PM
sixnotfour   numbers matching   Feb 21 2021, 12:16 AM
rick 918-S   numbers matching Wow that's cool!   Feb 21 2021, 06:14 AM
930cabman   numbers matching I suppose it's true, ...   Feb 21 2021, 08:28 AM
mepstein   numbers matching I suppose it's true, ...   Feb 21 2021, 08:56 AM
930cabman   [quote name='930cabman' post='2893282' date='Feb ...   Feb 21 2021, 03:01 PM
Mark Henry   numbers matching I suppose it's true, ...   Feb 21 2021, 11:33 AM
Superhawk996   In the grand scheme of maching up mag cases, ...   Feb 21 2021, 11:44 AM
jd74914   In the grand scheme of maching up mag cases, ...   Feb 22 2021, 01:29 PM
mepstein   In the grand scheme of maching up mag cases, ...   Feb 22 2021, 02:13 PM
sixnotfour   2.4 mag ,,best engine ever.. Next week .I'll b...   Feb 21 2021, 12:26 PM
sixnotfour   12,500 https://noonanrace.com/products/911-porsche...   Feb 21 2021, 02:38 PM
horizontally-opposed   12,500 https://noonanrace.com/products/911-porsch...   Feb 21 2021, 03:07 PM
stownsen914   Pretty sure that ITG small bore case pictured abov...   Feb 22 2021, 11:32 AM
bahnzai   Cabman, I have a ‘67 sand cast aluminum case eng...   Feb 23 2021, 03:53 AM
930cabman   Spend an hour or building a shipping crate to send...   Mar 1 2021, 04:57 PM
Superhawk996   Spend an hour or building a shipping crate to sen...   Mar 1 2021, 06:00 PM
930cabman   Ollies contacted me last week, they are back logge...   May 16 2021, 06:05 PM
rgalla9146   Could you keep us posted on turn-around and itemis...   May 17 2021, 04:32 AM
930cabman   Could you keep us posted on turn-around and itemi...   May 17 2021, 05:21 AM


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