Francesco (fra75) gt40 project

Hello to everyone, excuse my english.
I write from the Italian, and following an incident that was not my fault, in which I destroyed the shelby gt 500 of 2011, I decided to give life to the engine building my dream .... the gt 40, this is my gt40 project.
I built the chassis to accommodate a 5.4 liters gt500 engine,the transmission will be a g97 / 31 aisin, taken by a porsche 997 carrera 4 of 2008.
I struggled to put the engine that is very large in the GT 40 chassis, and even more I'm struggling to make the transmission, because the big engine does not leave me much room for the g97.
I also have to fix the problem of rotation of the transmission (I think I will mount the gearbox upside down, for otherwise I will have 6 gears only in reverse)
About this issue, who of you mounted a porsche g50 or g60 or similar like fixing the problem?
Work is still long, thanks to your help I hope to learn a lot , in this beautiful forum
 
I'm not practical in the forum, but I try to put some photos.
The pieces I've built or bought for the project

the engine:ford SVT 5,4 L 32 -Valve 4V DOHC SUPERCHARGED
 
Last edited:

Mike Pass

Supporter
Check if the crown wheel can be flipped rather than inverting the box. I understand it can be done on 915 and G50 boxes.

Cheers
Mike
 

Randy V

Admin
Lifetime Supporter
Check if the crown wheel can be flipped rather than inverting the box. I understand it can be done on 915 and G50 boxes.

Cheers
Mike
I think that's the first I've read that a G50 crown wheel could be flipped.
Curious how that can be since it is bolted in and shimmed via side cover. Can the output shaft / pinion be installed after the crown wheel being installed?
 

Fran Hall RCR

Moderator
It cannot be flipped on a G50 ...only 930 and 915

The Aisan box shown also requires the starter motor to come in from the engine side much like the G96/01...this is more troublesome than the usual transaxle mounted G50 style package...

The Asian is also not as serviceable/upgradable as the earlier Porsche transaxles either...
 
In the beginning I had considered both Renault UN1 and Audi 01E but I had many doubts about the ability to withstand the torque and the horses of the engine and as far as the Audi which model had been shown (many changes have 01E but are different one from the 'other)
I later thought of the Cayman's transaxle but a mechanical porsche friend told me to be these delicate transmissions, while the transmission of the 997 told me to be very durable.
Certainly I have to solve some problems, such as the starter and the length that is at the limit (between the engine that is very large and the gear box that is long enough, the risk of going out a few inches)
For sure you can not turn the differential on this gearbox, to reverse the rotation I thought the only solution was to turn the entire box upside down, use the vent as a point to draw the oil and through a pump to carry it over and practice a Safety lubrication
But this is my idea, if anyone knows me better, I'm here to listen.
I would have a question, but who does the g50 that I can use, how is it? Turns it upside down or is there another solution?
 
Hello Fran Hall rcr, thanks for the clarifications, You can produce gorgeous parts and also a beautiful GT 40 kit, really compliments!
I also sent an email to your company to ask if you have in production a motor / transaxle coupling plate for my project, I hope you will be able to help me.
Ultimately, I can consider changing broadcasts if someone advises me, selling a 997 change is not a big problem.

Thank you
 
thanks for the advices . For now I decided to continue on my way and use what I have at the workshop.
The g97 / 31 will not be the easiest choice but I think it's good rugged, at least so it looks like an optical gear test.
I'm designing the junction plate between the transmission and the engine.I'm not discouraged
 
thanks for the advices . For now I decided to continue on my way and use what I have at the workshop.
The g97 / 31 will not be the easiest choice but I think it's good rugged, at least so it looks like an optical gear test.
I'm designing the junction plate between the transmission and the engine.I'm not discouraged
 
It's always good to try other options and see what works and what doesn't.
Please keep posting your progress to add to the knowledge base for future builders.
 

Randy V

Admin
Lifetime Supporter
John's right...
I was told that a G50/03 was too long to fit within the bodywork of the GT40. After much research, we decided to shorten the nose-cone and shift rod to be the same length as the G50/01. It fits within the bodywork just fine.
Check out my website (below) and you'll see how I did it...
 
John's right...
I was told that a G50/03 was too long to fit within the bodywork of the GT40. After much research, we decided to shorten the nose-cone and shift rod to be the same length as the G50/01. It fits within the bodywork just fine.
Check out my website (below) and you'll see how I did it...




Beautifully your site! Compliments !! just got time to read and look at everything
thank you
 
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