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> '72 914 Power train swap, Removing V8, installing a ....
Chris914n6
post Apr 28 2019, 12:58 AM
Post #21


Jackstands are my life.
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ECU: look into Speeduino. Like Megasquirt with same software but newer tech and half the price.

Gauges: Speedhut. Not cheap but worth it and look appropriate.
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jb6000
post May 3 2019, 08:06 AM
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Thank you for the tips guys. Smart advice.
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ajracer
post May 3 2019, 08:02 PM
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Greetings JB6000:

The Audi transaxle looks very similar to my Audi 6 spd 01X which has 108 mm flanges. I had adapters machined to take the 108 mm >> 100 mm Porsche 944 / 911 CV's. Because the ttranaaxle is offset (centre line) I started with 5/8" adapters recessed bolts to Flanges, used 944T CV's and 911 axles, I believe the axles were 18.5" and 20" (going by memory). After several months realized that the right axle was too short, but after some re-measuring decided to keep what works and then machined thicker adapter on right side; seems to be the best solution. (custom axles would be costly and difficult to source).

Sorry I don't have more in common with your project since I am running a Z06 LS6 motor out of a 2004 Vette; and closer to 400HP. Enjoy the project and wish you good success. Allan
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jb6000
post May 4 2019, 10:33 AM
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A 2001 Boxster S 6spd
B Trans output flange -- 95 MM bolt circle diameter. 108mm overall diameter.
C Location of adapter/spacer (if used)
D 930 CV
E Axle 28 splines on both ends (19.5" and 20.5" maybe)
F 930 CV
G Location of 914 flange
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jb6000
post May 4 2019, 10:36 AM
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D and F ? 930 CV

https://www.pelicanparts.com/More_Info/9303...BSABEgJItfD_BwE
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jb6000
post May 4 2019, 10:43 AM
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E ? Axle

https://www.pacificcustoms.com/ac525207.html


Another: https://swayaway.com/product/axle-set-porsche-930-28-spline/
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ajracer
post May 4 2019, 07:46 PM
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Hi JP6000

Appreciate the follow-up comments and questions; unfortunately I am traveling and don’t have access to the files back home with access to more specific details as the build records so need to go back to reference things. Regarding your layout diagram above, the details are correct except the following items:

D – mine uses 944 turbo C/V’s and reason being they are stronger and excellent axle angles.
E – Axle measurements will be different as previously mentioned, as well depends up location of your transaxle and ride height of the car. I’ll update later next week on axle length and adapter thickness.
F - it is my understanding the C/V’s are measured by their Outside diameters Audi is 108 mm Porsche C/V’s 914, 911, 944 many at 100 mm, 930 & newer Porsche are 108 mm.
G - mine was converted to 5 lug 911 flanges / hubs.

Hope this will assist you in the process of your project.

Allan
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jb6000
post May 4 2019, 09:53 PM
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Allan,

Thanks for sharing your set up.
Thanks Mike and Andy and Chris.

I would not even have a clue without your help.

I guess the axle length will be the last thing I determine, and measure, after everything is mounted.

This thread will be here when you get home Allan, Safe travels!

Jerry
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jb6000
post Oct 24 2019, 07:20 PM
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944 clutch master cyl.
Adaptor cnc and crinkle powder coat.

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jb6000
post Oct 24 2019, 07:23 PM
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Also I bought Renegade rear transaxle mount for the Boxster S trans, and I bought a Shifter and Cables.
With the Renegade rear mounts my front to rear transaxle placement has been defined.

Need to fab motor mounts next ...
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jb6000
post Oct 24 2019, 08:49 PM
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Side view.
I made it fatter so I could drill and tap the 4 Bolt holes deeper.
Plans available on this forum.


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jb6000
post Oct 27 2019, 08:50 AM
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Still have not torn out the V8.
It drives.

The wiring was redone by PO. When I turn the key off the car keeps running. I think the alt. is charging the coil … ?

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jb6000
post Oct 27 2019, 09:34 AM
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I think I need a 12v 1 amp diode so the alt does not feed the coil +
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FL000
post Oct 27 2019, 11:09 AM
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QUOTE(jb6000 @ Oct 27 2019, 08:34 AM) *

I think I need a 12v 1 amp diode so the alt does not feed the coil +


Not sure about the diode but sounds like you may be getting constant 12V at the coil instead of switched 12V from ignition?
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jb6000
post Feb 15 2020, 12:39 PM
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I need to fab some motor mounts parts next.
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Daryl32
post Feb 15 2020, 12:54 PM
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QUOTE(jb6000 @ Oct 27 2019, 07:34 AM) *

I think I need a 12v 1 amp diode so the alt does not feed the coil +



Agree.
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jb6000
post Jun 12 2020, 08:54 PM
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Has anyone Putting a Boxster S transaxle in a 914 ....

Used the Boxster axles, hubs, rotors, calipers?

Just wonder if it's been done.
I found some threads on it.
Looking in to it.
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jb6000
post Jul 24 2020, 11:45 PM
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If you look on youtube for 914outlaw you will find more great infomation on this build.
Andrew has laid out how to set up a very efficient radiator system and water to air intercooler for this swap, on a budget.
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jb6000
post Apr 1 2021, 09:20 PM
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Mike Bellis mentioned these cv joints:

https://www.rcvperformance.com/ultimate-930...-28-spline.html


Nice parts! Thank you Mike!
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