Boxster S 6-speed, Anyone done this? |
|
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. |
|
Boxster S 6-speed, Anyone done this? |
gfg3 |
Aug 11 2015, 03:39 PM
Post
#1
|
Never Too Old Group: Members Posts: 117 Joined: 5-January 15 From: Southern Virginia Member No.: 18,295 Region Association: None |
OK, I've got a line on a very inexpensive Boxster S 6-speed. And I've got my '75 914 2 liter. I've checked through lots of posts here and at Pelican and other sites to see if anyone has actually used this trans in the 914. Lots of folks say it can't be done, but to me that's just a challenge. And there are hints that it has been done, but I need to know if anyone has actually done this. Yes, I know the starter issue and a few of the other "challenges". Anyone?
George |
Dave_Darling |
Aug 11 2015, 03:51 PM
Post
#2
|
914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
It's been done several times, hooking up to various non-stock motors. (Audi, Chevy, etc.) Just scroll down for discussion of the Small-Block Chevy version, and do a search for Mike Bellis' thread on his engine-of-the-month conversion car. He might have even had a rotary hooked up to a Boxster trans?
IMHO, the Boxster trans is not a particularly good idea with the Type IV engine. At the very least, it isn't needed--and it's quite a bit heavier. Plus you have to work out how to mount it, how to hook up the clutch, the reverse lights, the shift linkage, and the starter. Not to mention drive axles. It's probably easier to get a cable-shift setup from somewhere else, and buy two or three stock 914 transmissions to swap if you kill one. That'll still probably cost less than getting the Box trans all hooked in correctly. --DD |
Mike Bellis |
Aug 11 2015, 05:31 PM
Post
#3
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
You will need a custom adapter, flywheel, clutch and you will need to machine and weld the transmission to create a starter pocket.
If you can do all that, then yes it can be connected to your 2.0L T4. |
gfg3 |
Aug 11 2015, 05:37 PM
Post
#4
|
Never Too Old Group: Members Posts: 117 Joined: 5-January 15 From: Southern Virginia Member No.: 18,295 Region Association: None |
Thanks for your input Dave. I just had to know if anyone matched a 6-speed Boxster trans to a type IV. The Boxster trans is sweet, and I've driven and raced 914s and that trans is....well, not so sweet. Plus I had this (almost) free 6-speed available. Just a thought....
|
Andyrew |
Aug 11 2015, 05:44 PM
Post
#5
|
Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Might I suggest the 5 speed from the Audi A4/Vw Passat.
These can be found every day at the junkyard or from people parting them out. Dime a dozen and if you paid more than 150 for it you didnt do your shopping very well (last one I bought was 60 bucks...) |
Andyrew |
Aug 11 2015, 05:45 PM
Post
#6
|
Spooling.... Please wait Group: Members Posts: 13,376 Joined: 20-January 03 From: Riverbank, Ca Member No.: 172 Region Association: Northern California |
Its essentially the same trani but its been said they shift smoother. Not to mention there are a million gear combos you can use..
|
Mike Bellis |
Aug 11 2015, 05:53 PM
Post
#7
|
Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None |
Sell me the 6 speed. It will bolt right up to my Audi motor. (IMG:style_emoticons/default/biggrin.gif)
|
Mueller |
Aug 11 2015, 07:20 PM
Post
#8
|
914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
Might I suggest the 5 speed from the Audi A4/Vw Passat. These can be found every day at the junkyard or from people parting them out. Dime a dozen and if you paid more than 150 for it you didnt do your shopping very well (last one I bought was 60 bucks...) Good info there.... |
gfg3 |
Aug 12 2015, 04:42 AM
Post
#9
|
Never Too Old Group: Members Posts: 117 Joined: 5-January 15 From: Southern Virginia Member No.: 18,295 Region Association: None |
Thanks everyone. Sounds like it may be too hard. But then again, I have a couple of bizarre ideas about how to mate the trans that I'll have to think about. But for now, it's something I'll fiddle with once the winter weather hits.
|
brant |
Aug 12 2015, 07:53 AM
Post
#10
|
914 Wizard Group: Members Posts: 11,635 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
I Would worry about the gearing to a type 4
|
gfg3 |
Aug 12 2015, 10:08 AM
Post
#11
|
Never Too Old Group: Members Posts: 117 Joined: 5-January 15 From: Southern Virginia Member No.: 18,295 Region Association: None |
I Would worry about the gearing to a type 4 Gearing doesn't appear to be too bad, at least at first glance. If you consider that the Boxster has a higher (lower numerical) rear ratio and then work through the individual gear ratios, here's what I get for total ratio at the rear (not definitive...I did the math quickly): Boxster 1 13.14 2 7.57 3 5.23 4 4.20 5 3.51 6 2.89 914 1 13.69 2 8.37 3 5.58 4 4.10 5 3.14 6 ----- I haven't charted out all the shift points vs speed, but a couple of observations: Assuming 914 torque is sufficient to launch using the lower numerical Boxster 1st gear, the std 914 gearbox would pull a little better through 3rd gear. Once in 4th, Boxster pulls a little better. But frankly, now that I look at it, that 6th gear would probably be useless in most instances unless you really are looking for long legs and gas mileage. Again, not sure if the 4-cyl 914 has the power to even use that 6th gear effectively. Oh well, nice mental exercise. |
Lo-Fi Version | Time is now: 5th June 2024 - 01:06 PM |
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 ... |