The Defector

A418t81

I have one. It feels pretty much just like the GT2 setup. The pedal feel is much, much stiffer than the stock-like pedal with the sachs 2.5 that I have on my car. I got used to it pretty quickly, and it's nice to have the clutch engagement able to be felt now, as well as consistent. A worth-while upgrade if looking to do a conversion.

CincyScott

As a self-proclaimed wuss, I'm glad I read this. I always thought I wouldn't like the GT2 slave mod because of clutch pedal stiffness, but wasn't sure about this one. I wish the existing slave wasn't SO boosted, but I'm not interested in doing leg presses in traffic either.

The Defector

I was very worried too Scott. But at the dealer the other day was a used GT3, the clutch was no stiffer than any Vette, Firebird or any other car I've ever owned (I assume GT3 clutch feel is the same as a GT2). I personally feel the stiffnes trade off is well worth the predictability of clutch engagement and therefore the greater pleasure in driving.

If the BBI will give me that predictability then all the better and easier install. I just don't want to spend $1200 on a new method only to find out that I should've done the GT2 mod. That's why I started the post. I wanted reviews of the BBI before committing.
JC

A418t81

Keep in mind that I have the Sachs 2.5 clutch with the much stronger 764 pressure plate rather than stock, but this clutch pedal is now the stiffest I've ever experienced and I've had lots of high performance manual cars. It doesn't feel like a stock anything. It'll scoot your butt to the back of the seat when you press it down It's the same feel as the GT2 conversion in a more plug and play package.

CincyScott

Nope, I'm out! That's the clutch/pp in my 997tt and it's what I'll put in the 996tt when she's ready for one too.

Duckstu

You can fix that for $80.

The most common fix for this is to order the GT3 clutch pedal spring and drop it in there.

Do any of the GT2, GT3 etc or whatever conversion without this piece and you also have a similarly heavy clutch pedal.

Your tech should have asked you if you want an almost stock pedal or a heavy pedal before starting the work.

Yogi911

I love the stiffer pedal feel after the gt2 slave conversion. The consistency is obviously nice but i dont like loose pedals. Im not a fan of the 2-3 BMW clutches ive driven. Always thought the pedal was too springy and light (none were Ms).

With Sachs 2.5 and gt2 slave it will get stiffer (in a good way to me). Cant comment on the BBI unit but imagine it feels similar (if you put in the stronger pressure plate.

A418t81

I didn't need a tech to tell me anything, I was well aware of what I was doing and the benefits for me outweighed the negatives. I feel like this is a topic that is always glossed over, so I'm making sure that others know exactly what they are getting into. Notice I said it feels like the GT2 conversion two other times in this thread...

Duckstu

Whoops,.. sorry.

I had read the earlier posts long ago,.. and recently just the last few.

Obviously putting in a stiffer pressure plate AND getting rid of the hydraulic assist will result in a much heavier pedal. The BBI is "supposedly" a teeny-tiny bit lighter than the GT2 because of it's piston size,.. but you'd probably have a hard time noticing.

Those that don;t like a heavy pedal will need to do the GT3 spring.

Any thoughts on whether the GT3 spring will affect the "feel" ?

The Defector

Thanks your info and input, I want an answer from people like you and all the others. Maybe I should re-state/re-phrase my question. What is the best way to have a consistent better clutch engagement. It's not about how stiff or difficult it is to depress the pedal. I've determined that I can deal with the "stiffness". I now know I can potentially modify that stiffness.

My question is......
Will I get better consistent engagement with the simple BBI or do I have to do the full GT2 Conversion to get what I want?

It also makes me wonder, why not simply connect the pressure and return power steering lines together at the slave, remove the accumulator, plug all the holes, and you have the BBI.

THANKS everyone,
JC

Johnny DB

Do you have a part number? I assume the GT3 clutch spring is lighter than the GT3RS spring? I tried a GT3RS and wouldn't say the pedal was even close to light.

TypeRx

I'm a little confused by all the above, so TIA for bearing with my question.

I purchased a 997.1TT last fall and it already had a GT2 slave (EVOMS kit) and 2.5 clutch installed. I assume this involved no change of the clutch pedal spring. Is what you are saying is that swapping in a GT3 clutch pedal spring will lessen the pedal effort? I'd be surprised if the GT3 pedal spring is much softer than the stock turbo one. Or am I completely misreading?

El Dario Loco

+1

Duckstu

I believe the GT3 does not have the hydraulic assist in the slave cylinder like the Turbo does,... so it has a much stronger clutch pedal spring.

From my understanding,.. installing the GT3 spring will leave you with a clutch pedal that is only a bit firmer than stock,.. even though you have removed the hyd assist, AND installed a 2.5 clutch.

The part number for the Turbo clutch pedal spring is 997-423-081-52

And for the '05-'08 Carrera, Carrera S, Carrera 4, '06' -'08 GT2, and '08-'09 GT3 and GT3RS, GT3RS 4.0 it is 997-423-081-06

For '05 - '08 Boxster and Boxster S,... '09 -'12 Carrera and Carrera S, Carrera GTS, Targa 4S,.. it is 997-423-081-05

So you'd be switching from a -52 to a -06 I think.

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http://www.ebay.com/itm/Porsche-911-...-/170798387947