Subaru conversion from a Buick swap |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Subaru conversion from a Buick swap |
Darrensells |
Aug 23 2019, 03:19 AM
Post
#1
|
Newbie Group: Members Posts: 4 Joined: 4-August 19 From: San Antonio, TX Member No.: 23,345 Region Association: Southwest Region |
I recently purchased a 1970 914 that was converted to a 3.8 Buick in 1982 but only completed to 90% finished. I am almost finished but the engine has to come out due to timing cover gasket leaking. I am considering changing it all out to a Subaru 6cyl and 5speed Subaru transmission. What donor car should I seek to complete this project? Can I use the engine cradle from the 3.8 Buick? Will it be modifiable? Thanks.
|
Porschef |
Aug 23 2019, 04:45 AM
Post
#2
|
How you doin' Group: Members Posts: 2,180 Joined: 7-September 10 From: LawnGuyland Member No.: 12,152 Region Association: North East States |
(IMG:style_emoticons/default/welcome.png)
A few guys have done that here, I’m sure they’ll chime in at some point. If all other systems are in and functional and you’re gonna stay water cooled , Subaru is probably your best bet. Good luck (IMG:style_emoticons/default/beerchug.gif) |
76-914 |
Aug 23 2019, 07:47 AM
Post
#3
|
Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,637 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
I used an EZ30D from a 2003 LL Bean Outback. IIRC, things go to drive by wire in 2005 and CanBus shorty thereafter. Can't help you with the modification of your cradle. Here's how I did it but read it in it's entirity as mistakes were made and corrected. (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/welcome.png) http://www.914world.com/bbs2/index.php?showtopic=201776
|
Chi-town |
Aug 23 2019, 10:16 AM
Post
#4
|
Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
(IMG:style_emoticons/default/agree.gif)
You will not be able to use anything from the buick swap except the radiator setup. |
Darrensells |
Aug 23 2019, 11:02 AM
Post
#5
|
Newbie Group: Members Posts: 4 Joined: 4-August 19 From: San Antonio, TX Member No.: 23,345 Region Association: Southwest Region |
[quote name='Chi-town' date='Aug 23 2019, 11:16 AM' post='2740839']
Can you use the cradle with new motor mounts welded on? If not, who builds them or can it just be custom done locally? Thanks |
Chi-town |
Aug 23 2019, 01:46 PM
Post
#6
|
Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
The mounts are in a completely different area and can't be added to the V6/V8 style mount.
Currently only Renegade is making a bolt in cradle at $1k each |
Darrensells |
Aug 23 2019, 01:51 PM
Post
#7
|
Newbie Group: Members Posts: 4 Joined: 4-August 19 From: San Antonio, TX Member No.: 23,345 Region Association: Southwest Region |
The mounts are in a completely different area and can't be added to the V6/V8 style mount. Currently only Renegade is making a bolt in cradle at $1k each My mechanic says since so much has been invested into the Buick 3.8 setup, I should keep it with a 3.8 GM. He makes some good points. It would be cheaper. Just need a newer fuel injected engine. The 77 Regal engine does not have a lot of power and it is carb. |
mepstein |
Aug 23 2019, 02:19 PM
Post
#8
|
914-6 GT in waiting Group: Members Posts: 19,620 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
It just depends what your goals are. There's a reason the suby swaps are popular.
(IMG:style_emoticons/default/welcome.png) |
Chris H. |
Aug 23 2019, 03:11 PM
Post
#9
|
Senior Member Group: Members Posts: 4,048 Joined: 2-January 03 From: Chicago 'burbs Member No.: 73 Region Association: Upper MidWest |
The mounts are in a completely different area and can't be added to the V6/V8 style mount. Currently only Renegade is making a bolt in cradle at $1k each My mechanic says since so much has been invested into the Buick 3.8 setup, I should keep it with a 3.8 GM. He makes some good points. It would be cheaper. Just need a newer fuel injected engine. The 77 Regal engine does not have a lot of power and it is carb. And the Renegade cradle is designed to work with the 901 trans I think...you can't use the Subaru trans unless they have updated it. There are a couple of great 3.8 Buick V6 cars on the board...check Phoenix-MN and pjhaun. There was also a white 4.3 Vortec floating around a LONG time ago that was very nice. Not a bad idea to stick with the Buick and just find a higher performance engine. Much easier than starting over. The challenge is that it's nearly impossible to find a 5 speed EZ30D Subaru donor, in fact I have never seen one. This means you have to source the trans from one car and the engine/wiring harness/other stuff from another. And the wiring....oh the wiring.... (IMG:style_emoticons/default/headbang.gif) . If you were starting with a bare shell that would be fine, but you have an almost completed swap already. Totally up to you though...the EZ30D is a VERY good engine and the Subaru trans is a significant upgrade. |
Chi-town |
Aug 23 2019, 04:01 PM
Post
#10
|
Senior Member Group: Members Posts: 851 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
There are no 5 speed EZ30D, Subaru never made one.
I know a local guy with a built 3.8 if you need more power. |
porschetub |
Aug 23 2019, 04:49 PM
Post
#11
|
Advanced Member Group: Members Posts: 4,744 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
The mounts are in a completely different area and can't be added to the V6/V8 style mount. Currently only Renegade is making a bolt in cradle at $1k each My mechanic says since so much has been invested into the Buick 3.8 setup, I should keep it with a 3.8 GM. He makes some good points. It would be cheaper. Just need a newer fuel injected engine. The 77 Regal engine does not have a lot of power and it is carb. I would if I ever did this sort of thing the Buick is very good engine,go for a later one with FI,cheap as chips to buy and if late enough they make good power,had an Australian built Holden with Gen 11 3.8 seem to remember it was 220hp,sold it with 460,000kms on it still ran great....bulletproof. You say 90% done ,you are much closer than moving to a Suby six. Good luck. |
PatrickB |
Aug 24 2019, 12:38 PM
Post
#12
|
Member Group: Members Posts: 249 Joined: 26-March 17 From: sw ontario Member No.: 20,960 Region Association: Canada |
My mechanic says since so much has been invested into the Buick 3.8 setup, I should keep it with a 3.8 GM. He makes some good points. It would be cheaper. Just need a newer fuel injected engine. The 77 Regal engine does not have a lot of power and it is carb. [/quote] You might have the old odd fire 3.8, tough as nails but not huge horsepower. hard on timing chains... had one a long time ago in a Pontiac Astre wagon with a 5 speed. Car was quick enough because it was light. I'd be happy with your engine freshened up but if you want more power there's lots of bolt in options. |
jb6000 |
Aug 25 2019, 09:12 AM
Post
#13
|
Member Group: Members Posts: 52 Joined: 15-September 18 From: Ca Member No.: 22,486 Region Association: None |
From a practicality and cost point your mechanic is right. Some of us are twisted and build something difficult and end up with a specific set up that is really not available anywhere.
Lower center of gravity and less weight are probably not his first thoughts. |
914forme |
Aug 25 2019, 11:40 AM
Post
#14
|
Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None |
3.8 GM engine is a fine engine, I would go EFI and supercharged if you want to make something odd and interesting. Stock it is 240HP, a PCM and a pulley swap and you are getting closer to 270 if you think you need it.
240 is a pretty decent number in a 914 Engine is darn near bullet proof, except the latter ones that switched to a plastic water inlet manifold. But most of them have been fixed by now. |
Darrensells |
Aug 25 2019, 11:57 AM
Post
#15
|
Newbie Group: Members Posts: 4 Joined: 4-August 19 From: San Antonio, TX Member No.: 23,345 Region Association: Southwest Region |
3.8 GM engine is a fine engine, I would go EFI and supercharged if you want to make something odd and interesting. Stock it is 240HP, a PCM and a pulley swap and you are getting closer to 270 if you think you need it. 240 is a pretty decent number in a 914 Engine is darn near bullet proof, except the latter ones that switched to a plastic water inlet manifold. But most of them have been fixed by now. Do I need to change over the intake on these fwd 3800 SC engines? What I have read is you need the RWD Camaro upper and lower intake. Thanks. This would be much faster to build and more economical. |
whitetwinturbo |
Dec 2 2019, 11:30 PM
Post
#16
|
Honey, does this wing make my ass look fat? Group: Members Posts: 1,391 Joined: 22-October 11 From: Newport Beach/Kalefornya/USA Member No.: 13,704 Region Association: Southern California |
......research "bad penny" for inspiration!
|
Lo-Fi Version | Time is now: 7th December 2024 - 08:11 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |