my 5 speed shifter design
07-30-2011, 08:11 PM
#61
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07-30-2011, 10:29 PM
#62
Do not hesitate to also be working on the custom lever - as this could be made to work with many other shift handles - which some of us like.
08-03-2011, 09:00 PM
#63
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Hello all I have quoted the machined parts through my shop and the msrp price tag on my shifter, is in my opinion going to be very fair. I have a couple more items to work out before I come up with a price.
This price would be for a weld on anchor block. I know that this will limit the initial potential buyers but this will be the fastest way for me to offer the shifter. I am actively working on getting the clamp on setup ready to go. I would like to here from potential weld on users for testing assistance, give me a PM.
Sam
This price would be for a weld on anchor block. I know that this will limit the initial potential buyers but this will be the fastest way for me to offer the shifter. I am actively working on getting the clamp on setup ready to go. I would like to here from potential weld on users for testing assistance, give me a PM.
Sam
08-03-2011, 09:05 PM
#64
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Did I forget to mention I have an 85/86 torque tube & transmission waiting to go into my 81 that would be a perfect mock-up test mule?
08-03-2011, 09:21 PM
#65
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08-03-2011, 09:53 PM
#67
I was going to be doing that swap myself. Rebuilt 05 with LSD and rebuilt tt into the 86
08-05-2011, 08:48 PM
#68
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Here is my shifter update,
Tommorow I will have machined a complete clamp on setut. I will post pictures. I think it will be a nice looking setup and very functional. A set up like this will be a weekend project due to time and effort ,but having dead on shift shaft input geometry will help out in the long run. When you move the shifter from side to side the input selector shaft does not move other than rotate on its centerline. Fore and aft movement just move the selector shaft in ond out of the tranny. I truley think this is what Porsche should have done in the first place. Shifting this is very nice, it is butter like. I want to get this installed and try it under power, but I want to get the clamp on set done. I really think this is going to be major improvement to the 928.
sam
Sam
Tommorow I will have machined a complete clamp on setut. I will post pictures. I think it will be a nice looking setup and very functional. A set up like this will be a weekend project due to time and effort ,but having dead on shift shaft input geometry will help out in the long run. When you move the shifter from side to side the input selector shaft does not move other than rotate on its centerline. Fore and aft movement just move the selector shaft in ond out of the tranny. I truley think this is what Porsche should have done in the first place. Shifting this is very nice, it is butter like. I want to get this installed and try it under power, but I want to get the clamp on set done. I really think this is going to be major improvement to the 928.
sam
Sam
Last edited by wildwestsydney; 08-05-2011 at 09:14 PM.
08-05-2011, 11:47 PM
#69
Race Car
Sam...look up the SE New England group! Hope to see you at the NE get together at the Lars museum or the next Tassanari suare. Speaking of which, he would probably dig this.
08-06-2011, 12:30 AM
#70
Team Owner
I like the ideas you have and they seem very well thought out.
I would however strongly suggest that you install one of these new designs and road test if before committing any more of your resources to further production.
I have seen where another fabricator made a new part and was ready to go ahead with a full order from the machine shop and the part that was made didnt work as it should have ,
it would have made the initial production costs a lot higher if all of the parts were to have been sent back for rework.
I think that the road testing period will be critical,
dont be in a rush, you may find that the new part may have to be isolated to reduce the buzz from the transmission.
This way you will create a perfect replacement part. JMHO
I do suspect that there will be some transmission buzz transmitted down the shift rod,
you can see this for yourself simply by holding the shifter and adding a small bit of push to it while the trans is in gear and under power.
Goodluck on your path
I would however strongly suggest that you install one of these new designs and road test if before committing any more of your resources to further production.
I have seen where another fabricator made a new part and was ready to go ahead with a full order from the machine shop and the part that was made didnt work as it should have ,
it would have made the initial production costs a lot higher if all of the parts were to have been sent back for rework.
I think that the road testing period will be critical,
dont be in a rush, you may find that the new part may have to be isolated to reduce the buzz from the transmission.
This way you will create a perfect replacement part. JMHO
I do suspect that there will be some transmission buzz transmitted down the shift rod,
you can see this for yourself simply by holding the shifter and adding a small bit of push to it while the trans is in gear and under power.
Goodluck on your path
Last edited by Mrmerlin; 08-06-2011 at 12:42 PM.
08-06-2011, 09:58 AM
#71
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I have to agree with Stan, "MrMerlin."
From the research we have done with these Porsche transaxle drivelines to design our own products, having some sort of dampening in your design to isolate drive line vibrations from coming up through the shifter will help to keep the comfort of the driver and occupants.
Vibrations have a fatiguing effect on the driver and makes long drives very unpleasent.
Before making too many examples of what looks like a great initial design, test it for awhile under normal driving conditions and see if anything comes up as a problem.
Respectfully,
From the research we have done with these Porsche transaxle drivelines to design our own products, having some sort of dampening in your design to isolate drive line vibrations from coming up through the shifter will help to keep the comfort of the driver and occupants.
Vibrations have a fatiguing effect on the driver and makes long drives very unpleasent.
Before making too many examples of what looks like a great initial design, test it for awhile under normal driving conditions and see if anything comes up as a problem.
Respectfully,
08-06-2011, 12:18 PM
#72
Rennlist Member
A bit off topic but I love the insights and suggestions everyone is offering.
It's amazing to me that we have this community that is so willing to share their time, knowledge, and expertise in the name of keeping these cars on the road.
Can't wait to how this design works out. I think its a winner.
It's amazing to me that we have this community that is so willing to share their time, knowledge, and expertise in the name of keeping these cars on the road.
Can't wait to how this design works out. I think its a winner.
08-06-2011, 12:27 PM
#73
I partly disagree with the vibration comments. Many front engined/front transmission cars have the thrashing,mashing transmission directly under the shifter with metal to metal contact - and it's perfect fine.
The solution that is set forth in these situations is some intelligent engineering of materials sonas to
Partially isolate without the ridiculous sloppiness we have in our system.
Wildwest- you are doing great. That looks like an awesome design. The reason a TT would really vibrate is when there are imbalances. "Ringing" is a different story And can be dealt with through certain connection pieces having some nylon.
The solution that is set forth in these situations is some intelligent engineering of materials sonas to
Partially isolate without the ridiculous sloppiness we have in our system.
Wildwest- you are doing great. That looks like an awesome design. The reason a TT would really vibrate is when there are imbalances. "Ringing" is a different story And can be dealt with through certain connection pieces having some nylon.
