sequential shifters for 911's
 

I was at my mechanic on Friday. He was showing me a sequential shifter for his Porsche race cars. Very cool stuff. If anyone is interested I'll take some pics

Please do.

What gearbox are they using?

Can you tell me what type of box they are using?

Some details on the box would be interesting.

The new cup cars come with sequential boxes. ~30K per box.

I know about the new cup boxes, I was hoping there might be another solution. $30K retrofit is a bit pricy! I keep getting tempted though, reason however stops me

shifter
 

I'll get some more info for you. Im from the land of early 901's.

Here are some basic picshttp://forums.pelicanparts.com/uploa...1310435628.jpg
http://forums.pelicanparts.com/uploa...1310435682.jpg

at 30k you could swap in a hopped up superbike engine and have a sequantial gearbox more power and sound like an f1 car haha

Hey, good idea. I would rather have a turbo Subie flat 4 than a Hyabusa engine, though.

Apparently the servo has to be extremely precise due to the small inputs required for Porsche gearboxes. Good fun though. Love the gizmos!

They late cups also have auto blippers that rev the engines on a downshift, very neat

At a car show in May I saw a 997 GT3RS with a sequential shifter, but not a sequential gearbox. Apparently there is someway to do this without changing the box itself. To be honest, I didn't get it.

oh man this is awesome, ive always wondered about swaps like this, or with a dogbox, but i always thought that it wouldnt really work with the rear engine.

THanks for posting those pictures.

I might have missed it, but did anyone say what type of gearbox this is? Looks like one off a bike, but what type? Would any one off a bike work?
THnaks
Scott

Look up Jim Copp here on the Board... I do believe he has tried this set up on one of his older model monster race cars... Pricey is an understatement though...

This system retails for 3200 euros, so not that expensive for sequential shifting. As far as I know this mounts to the regular gearbox, no need to change the internals.
I doubt it works as well as a real sequential shifter, and have no idea about the shift times, but it's a nice option if that's your cup of tea.

Here's their site: SQS Racing | SQS-G Porsche

Jim was/is running a Holinger gearbox with his 4.2L monster if I recall correctly, not the computer/electronic controlled gear shifter that translates a sequential shifter at the stick to the regular H-pattern back at the transmission that I think is being talked about here. I haven't heard of one that incorporates the clutch as well. Cartronic makes this kit for the GT3 street cars and I see no reason why one could not rig up a similar system for an early car but the benefit without an automated clutch and ability to have no lift up-shifts seems questionable.

<iframe width="425" height="349" src="http://www.youtube.com/embed/iHSkpKJ1nv0?rel=0" frameborder="0" allowfullscreen></iframe>

IMO That's stupid... Sequential shifting on an H-Pattern box, give me a break! Get a cup car, and you have a real sequential shifter!

id like to know what shift know that is too along with what gear box?
thanks

heres what it is: its an attachment to the factory gearbox to make it sequential:
SQS Racing | SQS-G Porsche

SQS Racing | SQS-G Audi Quattro 01E

interesting...though on a more mundane level which US Porsche shop is trying to squeeze six speeds into a 901 box. Came across it earlier this year.???

Patrick Motorsports do a short bell housing gearbox which will / can be retrofitted. I got one of there 6 speed G50/52 boxes, with a short bell housing for my 1978 turbo body car...

you can see the box at Patrick Motorsports - Transmission > Porsche G50 Short Bell Housing

I understand that they do a 5 speed for the 901. see Patrick Motorsports - Transmission > Porsche 901 5-Speed

I really wanted to do a sequential box, but they aren't really that practical for street use. That said if they were reasonably priced I probably would have just for the sake of having one... but at 30K plus fitment and modification it would end up being a 40K job.

^^^^ A 5 speed 901 is no big deal. They are selling the cooling system in that link. 6 speed in the 901/911 box would be more interesting. 1st gear is already cantilevered in the nose piece, not much space left for gears.

wow, haha, i did not even see this post. i therefore made myself look really dumb when i thought i had scored for finding it.

agreed real interesting...any idea on who is doing this project? The info i read also suggested it was being prototyped on a 901 box from a 912?

Imagine what the cost of servicing and upkeeping woud be........

The early 6 speed rumour was something that was being done on behalf of Francis Tuthill. The project was abandoned and in the end they settled for a 5spd dog box. This was in a 915. A dog box for the 915 is nothing new. We've had one available for the better part of a decade.

Though to be perfectly honest I have been toying with the idea of a sequential gearbox inside of the 915 case. It's totally feasible. It takes a completely clean sheet of paper and new way of thinking to make it happen. I think I could bring it to market for under $20K.

It's just going to have to wait a bit. Right now we're in the process of finalizing designs and getting ready to prototype a proprietary sequential gearbox for the GT3 gearbox. Here's some discussion of it on another board:
gearbox conversion to sequential - 6speedonline.com Forums
The box we're currently doing is going to make Holinger's sequential used in the Cup Cars look downright archaic.

And just as point of clarity, no you cannot get a Cup Car Holinger sequential gearbox for $30k. That's about the price of rebuilding one. The shifter alone is a $7k part. I think buying a gearbox from PMNA without a core exchange is closer to $45k. Figure installing a Cup Car gearbox into any variant of 911 is going to cost you around $75k parts and labor.

Kind Regards,

Matt Monson
Guard Transmission LLC

I understand that Tuthill has done a 5-speed dog box now in a 901. They suggest that the 6 speed 901 box is next off the rank?

Sorry guys, I lost track of this thread. My mechanic installed in one of his clients race cars. The owner missed a gear a couple of times and spun a bearing each time - ouch.

If you have any questions let me know and I'll ask my mechanic. He knows his stuff.

If this happens I would be one of the first to buy one from you.

I've been planning a Hewland JFR6 or FTR (Star Mazda) conversion. Plan on designing the bell housing over the winter, then its just a question of finding or having a R&P made. Should be an under 10K option with plenty of cheap parts to go around...

Anyone know if its been tried?

How about a 1,000 HP Engine that powered this "SIT ON Motorcycle" to over 311 MPH in a standing start 1.5 miles??

&#x202a;Bill_Warner_311_MPH_Loring_With_BST_Wheels _Brocks_Performance.mp4&#x202c;&rlm; - YouTube