4 speed tranny stuff for the V8 and high HP /6 crowd, Pictures |
|
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. |
|
4 speed tranny stuff for the V8 and high HP /6 crowd, Pictures |
Dr Evil |
Feb 25 2008, 05:53 PM
Post
#1
|
Send me your transmission! Group: Members Posts: 22,995 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
Here is the latest gearbox I am building for someone. It is an F-N-X-HBf box and I wanted to show how easy it is to lock out 1st in a 4 speed box. I have heard that there are people that charge a chunk of change to do the same thing....I think that is wrong as it is way easy. All you need is a rear gasket, tubing cutter and a section of 3/8" copper tubing (1/2" shown as I bought the wrong size).
Here is the FNXHBf stack (Ooo, purdy). Here is the shift rod end for 1st that needs the sleeve to lock it out. I removed 1st gear completely other than the gear on the input shaft as you need it for reverse. And here is the section of ~2" copper tubing. You need to keep the slider for revers. It looks like the sleeve will hit the slider, but it is just the angle of the pic. |
Dr Evil |
Feb 25 2008, 08:09 PM
Post
#2
|
Send me your transmission! Group: Members Posts: 22,995 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart.
Attached thumbnail(s) |
Dr Evil |
Feb 26 2008, 08:47 AM
Post
#3
|
Send me your transmission! Group: Members Posts: 22,995 Joined: 21-November 03 From: Loveland, OH 45140 Member No.: 1,372 Region Association: MidAtlantic Region |
That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart. More thoughts. It also depends on your power plant as you all know I am sure. All V8s are not the same. The engine I am building the box for is 200+ hp and peters out at 4200 rpm. So the shift points you get with my set up in this box are about: -1st shift at 4K gets you to 35mph and 2nd at about 2.3k -2nd at 4k gets you 63 mph and 3rd at 2.9k -3rd at 4k gets you 85mph and 4th at 3K -4th at 4k gets you 115mph with room to go to 183 mph (theoretically) |
michaelt55 |
Feb 26 2008, 09:04 AM
Post
#4
|
Graduate of Life's experiences Group: Members Posts: 438 Joined: 2-September 06 From: Richmond, Texas Member No.: 6,753 Region Association: None |
Looks good to me Mike....
thanks.. Michael That seems like a tight grouping in the upper gears. Quite a bit of distance between 1 and 2 as well according to my chart. More thoughts. It also depends on your power plant as you all know I am sure. All V8s are not the same. The engine I am building the box for is 200+ hp and peters out at 4200 rpm. So the shift points you get with my set up in this box are about: -1st shift at 4K gets you to 35mph and 2nd at about 2.3k -2nd at 4k gets you 63 mph and 3rd at 2.9k -3rd at 4k gets you 85mph and 4th at 3K -4th at 4k gets you 115mph with room to go to 183 mph (theoretically) |
Lo-Fi Version | Time is now: 14th May 2024 - 06:10 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 ... |