 Adding a 915 trans to a 6 conversion, There must be a better way |
|
|
|
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. |
|
|
  |
| Steve |
 Nov 6 2016, 09:57 AM
Post
#21
|
|
914 Guru  Group: Members Posts: 5,580 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California 
 |
I'm running the Martin Bott kit on an 86 915 gear box on my 3.2. Starting off in second and slipping the clutch with the 901 got old. 3.6 or greater or a v8 doesn't have this problem, since they have the power to start off in second. Either way first gear is worthless and a four speed sucks in a sports car, let alone the longevity issues.
|
   |
 
|
| McMark |
Nov 6 2016, 10:41 AM
Post
#22
|
|
914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Whoops. Forgot my picture.
Attached thumbnail(s) 
|
|
|
|
| mepstein |
Nov 6 2016, 11:05 AM
Post
#23
|
|
914-6 GT in waiting Group: Members Posts: 19,258 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
|
QUOTE(McMark @ Nov 6 2016, 11:41 AM)  Whoops. Forgot my picture. Cool! |
 |
|
| rgalla9146 |
Nov 6 2016, 11:33 AM
Post
#24
|
|
Advanced Member Group: Members Posts: 4,550 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
|
Attached are pictures of a hangar and an idea for linkage that I fabricated to install a 915 in a 914 chassis.
I've since switched to the kit that Martin Bott makes that duplicates 916 parts. Attached thumbnail(s)  
|
|
|
|
| eitnurg |
Nov 6 2016, 01:08 PM
Post
#25
|
|
Country Member Group: Members Posts: 150 Joined: 31-December 02 From: Nairobi Member No.: 62 Region Association: None |
QUOTE I am building the adapter plate to put a G86-21 Boxster six speed behind my 964 motor. I will be documenting the whole process on World for everyone's enjoyment. Hopefully quite soon.......after despairing of the cost of 915s for some time, the thought that this may well be possible after all has raised the excitement level somewhat..... |
|
|
|
| 0396 |
Nov 6 2016, 02:15 PM
Post
#26
|
|
Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
QUOTE(Steve @ Nov 6 2016, 08:57 AM) I'm running the Martin Bott kit on an 86 915 gear box on my 3.2. Starting off in second and slipping the clutch with the 901 got old. 3.6 or greater or a v8 doesn't have this problem, since they have the power to start off in second. Either way first gear is worthless and a four speed sucks in a sports car, let alone the longevity issues. +1! , if I had the time, that's the way to go. Vintage looking too boot. |
|
|
|
| mb911 |
Nov 6 2016, 02:21 PM
Post
#27
|
|
914 Guru Group: Members Posts: 6,837 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest
|
Is length an issue for the booster trans?? I know I will use the 901 for now but maybe some day a 6 speed.
|
|
|
|
| ConeDodger |
Nov 6 2016, 03:13 PM
Post
#28
|
|
Apex killer! Group: Members Posts: 23,580 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
|
QUOTE(396 @ Nov 6 2016, 11:33 AM) Well, I'm happy to see that there's interest in putting a 915 in a 914. I remember seeing various treads stating that the 901 was sufficient even for a 964....interesting thoughts on the longevity. Clay's objective is very interesting. Especially with that monster 3.8 (IMG:style_emoticons/default/pray.gif) . Now, all we need is to see it at the track pulling away from some GT3. (IMG:style_emoticons/default/smile.gif) Well one good reason is five useful gears. 1st on a 901 can only be used to get you rolling forward. The 915 I'm putting in was designed by Porsche with gearing for my 3.2. I'm only adding a Quaffe TBD. Besides the nostalgia of having both Andy and my car in the shop at the same time! |
|
|
|
| jim912928 |
Nov 6 2016, 06:26 PM
Post
#29
|
|
Senior Member Group: Members Posts: 1,485 Joined: 8-January 04 From: Granger, IN Member No.: 1,536 Region Association: Upper MidWest |
McMark...just south of you about 1 1/2 hours. I've got the original 915 that came with my 3.2l conversion engine. I would be interested in your setup when available. My 901 is ok, but just not right at highway speeds.
|
|
|
|
| ClayPerrine |
Nov 7 2016, 01:21 PM
Post
#30
|
|
Life's been good to me so far..... Group: Admin Posts: 15,443 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
|
QUOTE(396 @ Nov 6 2016, 09:33 AM) Clay's objective is very interesting. Especially with that monster 3.8 (IMG:style_emoticons/default/pray.gif) . Now, all we need is to see it at the track pulling away from some GT3. (IMG:style_emoticons/default/smile.gif) Actually, it's not a 3.8, it's a 4.0. Subtle difference there...... :-D Wonder if the Texas DMV would catch a license plate that said "IEATGT3" ??? I am looking at going to the machine shop to have the adapter plate made sometime this month. Lots of pictures to follow.... |
|
|
|
| 0396 |
Nov 7 2016, 01:34 PM
Post
#31
|
|
Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
QUOTE(ClayPerrine @ Nov 7 2016, 12:21 PM) QUOTE(396 @ Nov 6 2016, 09:33 AM) Clay's objective is very interesting. Especially with that monster 3.8 (IMG:style_emoticons/default/pray.gif) . Now, all we need is to see it at the track pulling away from some GT3. (IMG:style_emoticons/default/smile.gif) Actually, it's not a 3.8, it's a 4.0. Subtle difference there...... :-D Wonder if the Texas DMV would catch a license plate that said "IEATGT3" ??? I am looking at going to the machine shop to have the adapter plate made sometime this month. Lots of pictures to follow.... So sorry for posting the wrong info..I must be getting old (IMG:style_emoticons/default/biggrin.gif) I did remember it was a "big cube" motor. I wish I could do the same (IMG:style_emoticons/default/biggrin.gif) . Looking forward to the progress with that monster. (IMG:style_emoticons/default/pray.gif) |
|
|
|
| jim912928 |
May 26 2017, 09:26 PM
Post
#32
|
|
Senior Member Group: Members Posts: 1,485 Joined: 8-January 04 From: Granger, IN Member No.: 1,536 Region Association: Upper MidWest |
any updates on 915 setup or boxster tranny setup?
|
|
|
|
| ConeDodger |
May 26 2017, 11:04 PM
Post
#33
|
|
Apex killer! Group: Members Posts: 23,580 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
|
QUOTE(jim912928 @ May 27 2017, 12:26 AM) any updates on 915 setup or boxster tranny setup? I think I'm the hold up. Sir Andys car is at the OC but lots to do with it before the transmission is the focus. I want to hang on to my car for the summer so it will not go out to Michigan until fall... |
|
|
|
| Steve |
May 27 2017, 11:14 AM
Post
#34
|
|
914 Guru Group: Members Posts: 5,580 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California
|
It's only money.. I have 10k in my Martin Bott 86 gear box. At least it's not a jury rigged mess. Same as factory and works great.
A Boxster S trans would be better if someone made a kit?? Hint.. hint.. it can be done. I've seen a 3.6 car with one awhile back. The 915 is harder to shift than a 914 trans, but having a trans with gears that match the motor is priceless |
|
|
|
| Mark Henry |
May 27 2017, 05:41 PM
Post
#35
|
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(mb911 @ Nov 6 2016, 09:20 AM) QUOTE(ClayPerrine @ Nov 6 2016, 03:11 AM) QUOTE(eitnurg @ Nov 6 2016, 02:18 AM) QUOTE There are certainly other ways to skin a cat. How about a Boxster trans ? I thought the problem was that the Boxster trans has no provision for a starter motor? Or am I missing something here? (They're certainly cheap, though.......) I am building the adapter plate to put a G86-21 Boxster six speed behind my 964 motor. I will be documenting the whole process on World for everyone's enjoyment. Yes, there is an issue with locating the starter. I have it worked out in my head, but that plan is subject to change when the plan contacts reality. Oh that would be awesome.. Yes a boxster has no provision for a starter, I really don't see how you can do it. I have a 1999, 996 trans here which I believe is the same trans (at least same case), I can post pic's if you like. I'll take a look at it right now. |
|
|
|
| mepstein |
May 27 2017, 06:18 PM
Post
#36
|
|
914-6 GT in waiting Group: Members Posts: 19,258 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
|
I'm not interested in a boxter trans for my car. I'm moving forward with the 911 trans and the parts needed that make the cable shifter work. Stay tuned. (IMG:style_emoticons/default/smile.gif)
|
|
|
|
| larryM |
 May 29 2017, 09:45 PM
Post
#37
|
|
emoze Group: Members Posts: 891 Joined: 1-January 03 From: mid- California Member No.: 65 Region Association: Northern California
|
check this - apparently Martin's parts ???
https://sfbay.craigslist.org/pen/pts/6146003135.html Porsche 915 to 916 Side Shifter Conversion Tooling and Parts. Description: 1 Set Detail Machining Drawings 1 Set San Casting Patterns 2 914-6 Firewall Engine Mount 3 Rear Castings 1 Machined Rear Casting. 3 Machined Side Shift Housing (One Is Assembled) 3 Internal Shift Arms ( 2 with Shafts) Total Price $5,500.00. who among us is the seller? p,s, - i have the complete Bott kit & a rebuilt 915 on the shelf - but have never had the compulsion to do the conversion since i have 3 good 901's & they'll handle 250hp which is all my 3.2 makes QUOTE(rgalla9146 @ Nov 5 2016, 05:42 PM) I wonder if Martin Bott would sell his side shift parts separate from his complete 916 conversion kit ? The trans can be supported with a fabricated rear mount (which someone already makes)and the 915 rear cover and selector shaft can be trimmed to clear the muffler.(or not ?) If so, the only fabrication is the shift rod which is pretty straight forward and getting it to coordinate with a 915 shifter. Oh yeah, clutch cable too. PS I have the whole setup from Mr. Bott and already did the trans conversion |
|
|
|
| Steve |
May 29 2017, 10:26 PM
Post
#38
|
|
914 Guru Group: Members Posts: 5,580 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California
|
Looks more like a poor copy of the vellios kit.
|
|
|
|
| porschetub |
May 30 2017, 12:23 AM
Post
#39
|
|
Advanced Member Group: Members Posts: 4,697 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
QUOTE(larryM @ May 30 2017, 03:45 PM) check this - apparently Martin's parts ??? https://sfbay.craigslist.org/pen/pts/6146003135.html Porsche 915 to 916 Side Shifter Conversion Tooling and Parts. Description: 1 Set Detail Machining Drawings 1 Set San Casting Patterns 2 914-6 Firewall Engine Mount 3 Rear Castings 1 Machined Rear Casting. 3 Machined Side Shift Housing (One Is Assembled) 3 Internal Shift Arms ( 2 with Shafts) Total Price $5,500.00. who among us is the seller? p,s, - i have the complete Bott kit & a rebuilt 915 on the shelf - but have never had the compulsion to do the conversion since i have 3 good 901's & they'll handle 250hp which is all my 3.2 makes QUOTE(rgalla9146 @ Nov 5 2016, 05:42 PM) I wonder if Martin Bott would sell his side shift parts separate from his complete 916 conversion kit ? The trans can be supported with a fabricated rear mount (which someone already makes)and the 915 rear cover and selector shaft can be trimmed to clear the muffler.(or not ?) If so, the only fabrication is the shift rod which is pretty straight forward and getting it to coordinate with a 915 shifter. Oh yeah, clutch cable too. PS I have the whole setup from Mr. Bott and already did the trans conversion Good points really is the 901 that bad,even if you exceed 250hp it is cheap enough to replace or adjust your driving style. The 915 isn't the total answer in fact the real 911 guys grizzle about them,they aren't as strong as expected and a very noisey....not such an issue in a 914 but in a 911 not so good. |
|
|
|
| ChrisFoley |
May 30 2017, 06:39 AM
Post
#40
|
|
I am Tangerine Racing Group: Members Posts: 7,924 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
|
QUOTE(Steve @ May 30 2017, 12:26 AM) Looks more like a poor copy of the vellios kit. I think those are unfinished Vellios parts. |
|
|
|
|
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2024 - 02:42 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.