trcarrera

I have a 914-4 that will soon be a 914-6. Im going to be puting a 3.6 L in. My question is what Transmission do people think I should use and how should I put it in.

Any tips would be great,
Theron

racergreg

For a 3.6 liter you should use a G50 tranny from a 964 or 993. It was designed to go with that motor and has the strength to handle the torque. The only downside is having to plumb the hydralic clutch.

You will have a monster of a car...don't forget to upgrade the brakes, too!

trcarrera

How many people have put a G-50 Transmission in a car that started out as an originaly 914-4. I would like to use a G-50 but I think it would be very difficult to install. If any one can find documentation on the installation that would be great. This is what Im going to be running for brakes http://www.vehiclecraft.com/Brakes/B...11_Upgrade.htm

Thanks,
Theron

hitbyastick

i have read of a guy (and there's a website somewhere) who put a 3.6 in his 914-4, but kept the 901. He skips first gear. The G-50 is the way to go, but it's bulkier and maybe you have to make your own shift linkage.

trcarrera

Im building a 914-6 out of my 914-4. I have a ultimate 914 wide body coming. SO I need to take off the 914-4 body how should I go about that. And web pages or tips would be great.

Thanks,
Theron

--JR--

I've recently been checking out the same things. I'm most likely going to be using a 915 and have turned down the G50 as a close runner up.

1-The G50 I'm told is a significantly longer transmission and will not just bolt in behind a 6 without cutting out some of the rear valence on a 914. This idea didn't appeal to me.

2-The G50 is also a fairly heavy transmission, the 915 is lighter (but only 5 gears)

However I am looking at running a 3.2 stock. So I should be just fine with a 915 and the G50 would just be nice for the available 6th gear.

jim912928

JR - why don't you start a thread and cover your conversion. I've just finished a restoration (body strip, new interior, new 911 suspension, 5-lug etc.) on a 75. Now that it's looking pretty I need some power...so I'm looking at a six conversion. People have told me the 3.2 is the easiest?

--JR--

I might start a thread on it when I am closer to beginning the project. At this point I figure I'm a year away. I need to build my new garage / workshop first (1800sq' which should start this spring. But I've been collecting ideas on what I want and investigating parts. That way I can keep an eye out for good prices on the parts I want.

As per the 3.2... I'm not sure if there is an "easy" route but the most popular engine configurations I've seen have used a 2.7 or smaller with the 901 transmission. Even with a hot 2.7 the 901 will not take the abuse, but it is a very light transmission compared to anything else. Even with the 3.2, the 915 is reaching it's peak torque levels and Porsche even installed a oil cooler circuit when they used this combination in a 911. But more so the clutch and trans is behind the motor in a 914 so there is more heat still. I think it still should be more then adequate for a 3.2 but a 3.6 might be a little too big for a 915 in this configuration.

I've opted for the 3.2 because it's just a much more modern looking engine. Plus I've heard from many people that even a 2.2 is A LOT of motor for one of these cars so I didn’t see the need to go bigger. But to be honest I've never driven any 914-6.

I just bought my 75 914 at the beginning of Dec myself. I had been looking for a while and then I got a call from a friend in the local Porsche Club. I got this 75 in virtually rust free shape (even original battery box is all there) but a problematic motor for $4,000can. Perfect candidate for a 914-6 right? But since the project isn’t going to start for a year I’ve decided to throw a couple bucks at the 4cyl motor and drive it for a year. I bought it just on the basis of the lack of rust at first, but it actually quite complete and a very nice little car. Haven’t decided on GT or just chrome bumpers, but those rubber things HAVE to go!

James

TREMPER

Well gus , I have been reading this thread and having run a 914-6 for 25 years with motors from the original 2.0 liter thru a 2.2S, 2.4S,2.7RS and presently a 3.0 liter twin plug all with a 901, you need to do several things. First and formost you need to tie a roll cage into the rear suspension inner "ears". The car was designed to handle 110 HP on i85/70/15 wheels and tires and now you wnat to go to over 200 HP and more rubber. Without supporting the rear suspension now you will crack and tear them from the car..I know for I have done it. The 901 is fine if you cool the oil and return the "cooled" oil to the ring and pinion. The trans oil temp will reach 340 degrees F on hard track abuse because the engine headers run under the trans. Going to a 915 is fine, but I have not seen a linkage system that is adequate for my track needs.
Pete Tremper

Jay Gratton

Pete, What exactly are your track needs? Will those ever be met?

Irishdriver

Having drive the boxster for a while now I have ideas about putting a boxster drive train in a 914.
The main advantage would be the cable gearchange which would be a massive improvement over a standard 914 set up.

Has anyone tried putting the boxster cable gearchange on the standard 914 box?

fetus

I'm running a 3.2 in my 75 914 with a KEP adapter clutch and the stock 914/901 transmission.
The KEP adapter works with the stock 3.2 flywheel so you can keep the DME injection.
So far I have 15k miles on the conversion with no problems.
I just baby first gear and beat the crap out of 2nd through 5th.

trcarrera

I was wanting to know if any one knows of any one that could build a full rollcage for my 75 914. Also I have new body work for my car and wanted to know if you know of any one that could do a good job with that. Also I live in Ohio

Thanks,
Theron Hill

Irishdriver

www.heigo.de will give you one in return for some of your hard earned cash.

www.safetydevices.co.uk also list one.

The advantages of these ones is that they are already approved for competition.

I'm sure there must be an equivalent supplier in the states - after all you bought most of the 914s in the first place..

fetus

I'm running an autopower roll bar.
They also make a full cage.
Safety devices seems to be the one of choice.
Check out Martin's gt thread for pictures on the Safety devices cage.