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Me personally, Likely shifting faster than I should. It is a Wevo 915 conversion in my 914/6. ~300hp and gobs of torque. It isn't as precise as I'd like it to be and have had some issues with mostly third gear. I think the gearbox had a slightly bent shift rod in it that was causing some issues. That has been remedied. We will see how it goes from here.
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-Jay '74 Mexico Blue 911 3.0 EFI (Fast and Loud) '70 914/6 Race Car (Faster and Louder) '71 73RSR tribute vintage race car 3.0 '68 SWB 911T "RENNRAT" 2.8 twin plug/915 gearbox '81 Magenta IROC clone in progress 3.6 varioram/G50 |
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,887
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Yeah, when I get into the heat of battle in a race I sometimes shift faster than I should. The box can handle that as long as, once a year, I get it checked as refreshed as needed.
I am using a JWest Rennshift. I was having some issues with missing the 2nd to 3rd shift and broke a couple of rockers and bent some valves. I made the spring that pushed the shifter from the 1/2 plane to the 3/4 plane stronger and that seems to have solved the issue. I did buy a Wevo GateShift to try and I am still debating installing it....
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Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion |
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Registered
Join Date: May 2001
Location: Hurst, TX. USA
Posts: 804
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Quote:
I am. I built the one in my 914. And I don't make a flywheel, I make an adapter for the transmission and pressure plate. ![]() I have not started the production run yet. Covid delayed it big time. But the first prototype is in my 914-6 conversion. You can see the info here: 914World.com - The largest online 914 community! Here is a picture of the underside of the car with the engine in it. ![]() Let me know if you have any questions. Clay
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Clay Perrine 74 914 1.8L (Frodrick) 73 914 /6 4.0L 964 motor (Igor) 70 914 /6 Factory Six. (Elwood) 95 BMW 540i (Inga) |
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Clay. THAT IS SCHWEET.! Best of luck getting it into production.
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Scott. In trying to sort this out, I started with Wevo race shifter , then went to the JWest unit... it was not good for me at all(worse than Weave) .. could not find gears in heat of moment. Now trying this CAE unit : https://cae-racing.de/CAE-Ultra-Shifter_3576. which virtually none of my wrenches have experience with ( +big $$$). We will see. it was discouraging when it arrived and I was told they had no installation alignment instructions in English .. had to wait 4 months for them...
Do you have 1st gear synchronized in your 915 box so you can use it on track? |
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,887
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I have what is often called in the racing world an "active" 915. It means that 1st gear is useable at racing speeds. My 915 has a mainshaft with a changeable 1st gear. If you can't get the Rennshift to work well something is wrong with the 915 or something else in your setup. If the Wevo nor Rennshift work for you, I don't see how the CAE will........
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Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion |
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,556
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Quote:
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Join Date: Oct 2005
Location: Idaho
Posts: 2,357
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Quote:
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This is all just one person's experience... I'm happy that there are so many options for us to chose from! Best, Tom
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'74 911 Red Sunroof Coupe, 3.6L, etc... '76 912 Yellow SPEC 911/911CUP |
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Join Date: Mar 2011
Location: Minneapolis
Posts: 388
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Am I the only one interested in seeing a PDK swapped into an aircooled? That could be a much cheaper alternative to a sequential.
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Instagram @everythingcrafted Day Job - Crafted Wealth www.craftedwealthmanagement.com |
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,556
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A sequential is lighter than an equivalent street car gearbox. And there's no electronics or ecu. If someone has a motec, they can integrate a sequential into it, but you can 100% run a sequential strictly mechanically, and many do. As is often the case in motorsports, the lighter a thing is, the more it costs.
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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scumbag
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***I'm also working on convincing my Mrs that I really need a sequential...for science.
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My first Porsche - http://forums.pelicanparts.com/porsche-911-technical-forum/989493-my-low-budget-dream-car-build.html AchtungKraft #009 - IG: @doktor_b |
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,556
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That's exactly what we did with the Cayman in my signature. This is what's in the trunk... ![]() ![]() If any of you have followed the Blasphemy build that Mike O'Neil is doing, that's my adapter kit he's using. It mates a G96 or G87 gearbox to a Subaru Ej engine. I would love to put this Cayman sequential into a 914 with a Subaru, but I'm not building any projects right now. Maybe next year once things are more normal.
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1974 914 Bumble Bee 2009 Outback XT 2008 Cayman S shop test Mule 1996 WRX V-limited 450/1000 |
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scumbag
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(I was hinting that I would volunteer for those DD beta-testing duties. ![]()
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My first Porsche - http://forums.pelicanparts.com/porsche-911-technical-forum/989493-my-low-budget-dream-car-build.html AchtungKraft #009 - IG: @doktor_b |
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,556
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Yes Matt. .. of course..: beta test... " For Science!!" and remember. I am the card-carrying scientist ... Plus.. I will sequence your genome FOR FREE! send it my way....
seriously. I hope you get that developed |
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Hi Mario,
Albins in Australia make the sequential transmissions for the V8 supercar series here in Australia, they also make various other transaxles. They list a lot of gears etc for Porsche transmissions. May be worth a look. albins.com.au Cheers Ray |
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Registered
Join Date: May 2001
Location: Hurst, TX. USA
Posts: 804
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Quote:
So for cost reasons, and for simplicity, I went with the 6-speed. Plus.. I like to row the gears when driving. Clay
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Clay Perrine 74 914 1.8L (Frodrick) 73 914 /6 4.0L 964 motor (Igor) 70 914 /6 Factory Six. (Elwood) 95 BMW 540i (Inga) |
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Registered
Join Date: Sep 2015
Location: Costa Rica and Pennsylvania U.S.
Posts: 3,301
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better shifting
Love these posts.If you have a good trans guy you can change the brake bands for the synchros to travel only 1.5-2.0 teeth instead of 3.5 teeth for synchro hookup.I have been doing this for 35 years.Only for my customers though.Never had a web site or want for more money.Hint is use a brake band from a later car and trim an earlier brake band for shorter travel.I no longer have a shop so I will share.Sometimes I have frustration to read these posts.I shared this knowledge with Grady.He enjoyed.The only problem is you need a driver who knows how to drive.Ciao Fred
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Fred that is cooler than snot..... something I have never heard on these pages. maybe you wanna visit my shop....
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scumbag
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That's all news to me about modifying the synchros to quicken the shifts. PA isn't all that far from IN if you still have tools and can find some time...
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My first Porsche - http://forums.pelicanparts.com/porsche-911-technical-forum/989493-my-low-budget-dream-car-build.html AchtungKraft #009 - IG: @doktor_b |
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