916 gearbox conversion kit (915 to 914) Options

[bugat5speed]

@ scraperhand:

yes, thought so.

Martin

[sixnotfour]

Martin Invoice ?

[RON S.]

Martin,

Deposit on the way via Alex.


Ron

[sixnotfour]

Deposit sent.

[RON S.]

Got my Mechanical Speedo kit today. (IMG:style_emoticons/default/biggrin.gif) In a couple of month's, after some car shows, I'll pull the tranny and make the swap...


All looks Great...

Thanks Martin (IMG:style_emoticons/default/wavey.gif)

[Britain Smith]

This kit looks awesome.

For those who are converting to this set-up and will be parting with their Vellios kits, please let me know as I may be interested.

-Britain

[Mark Henry]

I notice it has the rough casting for the scavenge pump, any plans to finish that part in the future?

[bugat5speed]

Don´t know exactly what you mean with the scavenge pump, but if it´s the same that I think (mechanical oilpump driven by one of the mainshafts in the gearbox) I can tell you that I have measured all positions and dimensions of a 915 nosecone with such a pump. I even did mill it at one 915 nosecone in the past. So if you have such a pump system - for me it´s no problem to prepare the milling for it.

Martin

[larryM]

Quick note to say Martin has shipped my kit as of June 1 2013

I already have a rebuilt 915 on the shelf,

and now need to find the shifter parts

- so if any of y'all can point to the complete list of shifter & clutch parts I need, and possibly a provider, it will be much appreciated (... hate to have to shop it on eBay piecemeal)

I'm currently running 901 sideshift with a 3.2, with no problems

Larry M

[Steve]

I bought my clutch kit from Zims
http://www.allzim.com/store/
915 shift rod from Patrick Motorsports.
I also bought the PMS clutch cable and clutch cable adapters and firewall shift rod bearing for his shift rod..
915 shifter from Rennshift/Jwest
Other miscellaneous clutch parts like the omega spring I purchased through Pelican.
I also installed a 1975 911 pedal assembly with a late model clutch return spring.
I also purchased Swayaway axles and 86 inside cv joints for my 86 915 trans and 1973 911 108mm cv's and stubs for the outside.

[DEC]

My shift rod setup at the gearbox
It's not finished but soon.....

[DEC]

[RON S.]

I'm in the midst of putting mine together.

I chose to use (2) 5/8'' Apex joints and a length of 5/8'' diameter tubing to connect the whole thing.

Basically makes a driveshaft out of the assembly.

I haven't got the unit ready for the road yet but, I can say this much.

With everything hooked up, and having a JWest shifter up front, this unit has a much much smoother, tighter, and a OEM feel to the shift quality over the Vellios unit I removed..

I'm pumped to put it back on the road...

[RON S.]

I've recently finished my transmission side shift swap out from my previous Vellios unit to Martin Bott's 916 kit.

Happy to say that I think I have all the bugs worked out, and am happily motoring on. (IMG:style_emoticons/default/driving.gif)

I've got about 50 or so miles on the unit now, and feel comfortable sharing my thoughts between the 2 units, and the quality of the current product which I have received.

on the Plus side.
1. Martin's kit is a very good quality unit, and he's gone to great lengths to ensure, at least for me, my customer satisfaction. The castings, and the machining are top of the shelf. Everything fit like it was supposed to. He's invested a lot of time and energy into this kit, and it really shows.

2. Very good vendor to work with during the waiting phase. He's a long way away, and sending a pile of money to someone you'll probably never meet in person can be a nail biter, but he's very in tune to these concerns, and was always accessible and very accommodating to allay one's nervousness.

3. With the kit installed, and adjusted, the shift quality is 100% improved over the Vellios unit. (IMG:style_emoticons/default/piratenanner.gif) I'll say now, I have a JWest shifter, Apex joints on a straight shift rod, and this combo combined w/the 916 kit, make for short, direct gear engagement. So far, knock on wood, each and every time. I feel I can now power shift with confidence.

4. I now have a side shift kit on my 915 transmission that has FACTORY Part#'s on it, so I feel I've increased the resale value of the car relative to one day selling it.

On the down side..
1. Cost... With the Euro the way it is, the kit is now pretty pricey, but that is not Martin's fault nor should reflect on him. He works for a dollar just like we do. it's just to bad his dollar costs us $1.30.

2. No instructions included. What you get is a box of parts. If you don't know your way around a 915 box, you'll have to take it to someone who does. There was machining I needed done on mine, and some minor fitment of the shift shaft support, but nothing major.

Random Findings during the change out.

1. You'll need to thoroughly explain to Martin what you have for a 915 box so he can properly send you the correct parts for your conversion. IE: whether you have a mag case or an aluminum one. any mods you may have previously done to your trans. Billet retainer, Spray bar ETC... As I have found out, little things make a difference in the process going smoothly, or having some bumps in the road. He's designed the kits as if they were being installed, in completely stock Mechanical speedo(Mag Case), or Electric speedo (Aluminum Case) applications.

2. The support hole for the idler shaft in the nose cone needs to be chamfered. it'll come with sharp edges that'll tear the o-ring the first time you try to fit it. Chamfer that hole.

3. There is a set screw that locks down the shift lever to the shift shaft, inside the shift housing that bolts to the bottom of the transmission. LOCTITE this set screw before your final assembly. Failure to do so will result in the screw vibrating loose. The shift quality will quickly begin to deteriorate until the internal shift lever falls of the shift shaft. When that happens, you'll have 0 gears, and a floppy shifter going nowhere. Ask me how I know.. (IMG:style_emoticons/default/sad.gif)

All in all, I'm happy with the purchase and the process. (IMG:style_emoticons/default/beerchug.gif) I should have bought it when he first put it on the market. But, I'm glad I finally got it behind me now.
I'm copying this post in the garage section.

here's a few pics of the completion.

[larryM]

Ron, thanks for this !!!!

very helpful - it seems we are crowd-sourcing the "instruction manual" here

I rec'd my kit from Martin about a month ago - still need to acquire the shifter stuff; it's all just on the shelf, for "someday" since i have a good working 901 sideshifter behind the 3.2 now

your advice mirrors my experience

- since i did not have a 915 already in pieces, i did not have the "exchange parts" Martin requires (i did not understand from the adverts that they were not included in the kit - I ordered a "complete kit" only to later learn that those cores are only an exchange deal - so guys who have not yet ordered should be sure they have the exchange parts available before sending their deposits)

- after a few back-n-forth, Martin provided a contact in NJ who supplied the cores for a fair price, and i then got the whole "complete" package

- then i got the 915 shifter console & rods from a Pelican advert

[bugat5speed]

Looking for gearbox mechanic (company) California

Currently have a customer who wants a converted 915/916 gearbox. He´s looking for a mechanic with Porsche 915 gearbox skills and who´s intersted in doing a conversion with my 916 parts.

Please contact me if you´re interested.

Martin

[Steve]

I couldn't find anyone in So Cal, that could figure out how to make it work. I ended up driving to Patrick Motorsports in Phoenix. I left my car and flew back.
Now the trans shifts like it should. Couldn't be happier. If you can't find a shop, you can always ship the trans to PMS and let them build it.

[Matt Romanowski]

I know this is an old thread, but I wanted to give my experience. I didn't install the kit myself, I had Mark at Exotech in Plaistow, NH do it. He's a 915 expert. The kit had a few gotchas like places to clearance and how some things fit. We also did a custom oil spraybar for the drive gears and put a limited slip in.

End result - it's AWESOME! The transmission shifts awesome and the ability to pick all the gears for a reasonable price is amazing. We've only done 3 track days with this setup, but I'm excited for more.

[Luke M]

Hi Martin,

What's the going rate for one of your kits these days?
Would be for an aluminum 915 gear box 1984-1986 year.

Thanks,
Luke

[Steve]

Hi Martin,

What's the going rate for one of your kits these days?
Would be for an aluminum 915 gear box 1984-1986 year.

Thanks,
Luke

Here is a link to his web site with current pricing.
https://www.bugat5speed.de/en/porsche-cars/...for-porsche-914

I would email him direct. Sometimes he has special offers and group buys.