2.7 case guru, save/scrap |
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2.7 case guru, save/scrap |
930cabman |
Feb 20 2021, 07:41 AM
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#1
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Advanced Member Group: Members Posts: 2,977 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
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 |
brant |
Feb 20 2021, 09:06 AM
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#2
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914 Wizard Group: Members Posts: 11,584 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
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 |
930cabman |
Feb 20 2021, 01:38 PM
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#3
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Advanced Member Group: Members Posts: 2,977 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
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 |
mepstein |
Feb 20 2021, 03:30 PM
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#4
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914-6 GT in waiting Group: Members Posts: 19,142 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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. |
horizontally-opposed |
Feb 21 2021, 02:28 PM
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#5
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Advanced Member Group: Members Posts: 3,430 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
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… 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. 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 Attached image(s) |
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