Carmon997S

Nice write up Michael. Glad you are making progress. I think you are right about all of the PCCB's having some drag. Mine have about half the drag of what you show in your video. So if you are there now I think you have it fixed. Mine are 2 years old now and it is recommended to flush the brake fluid so that's what I will be doing soon too try to avoid the problem you are having. Good luck with the rest of the project and keep us posted. Jermmy

Michael, just in case you need it, here is a link for a new master cylinder. About $385, a lot cheaper than I thought it would be. I use these guys for all of my parts. A lot cheaper than the dealer. http://www.suncoastparts.com/product//SKUGT3BMC.html Good luck Jermmy

I feel your pain. I work out of town a lot too. Hope you get it sorted soon so you can enjoy driving instead of working on it. :drive: Jermmy

Good to hear. If you can now may pull the piston and see if there is a ring worn into it or the cylinder it came out of. If there is no ring or corrosion, then they are probably not sticking and you can start thinking about something else upstream. Jermmy

Hi Michael, sorry to hear about the problem. I don't have a shop manual but hear is a link to Porsches part break down pdf. http://www.porsche.com/all/media/pdf/originalparts/usa/GT3-2_USA_KATALOG.pdf You can also do a web search on the topic. I'm sure they are no different than any other Brembo caliper. Also if anyone know the procedure it's Loren. Jermmy

True. You have a beautiful car and color but very hard to keep clean. :cheers:

Hi Phillip Wish I could say the same. Maybe it's just because I have gloss black wheels or maybe it's because I drive this car harder than my old 997. Either way, after only 100 miles my wheels are covered in a light colored powered. I agree that it is easier to wipe off. If I had silver wheels I don't think I would notice as much. I think Michael is talking about dust in the amount you would see from a track day, which is abnormal for everyday driving. Jermmy

Glad I could help and I will keep my fingers crossed for you. Hopefully it will do the trick. Jermmy

Just looked it up and there is only 1 master cylinder.

Hi Michael I saw your post on Rennlist after I responded. Sounds like you have been going round and round with this problem. I'm not sure the best and proper way to travel the pistons. I did it on my bike with a block of wood that was thinner than my rotor. Basically you put the caliper in a vise with soft jaws to hold it in place. Then with the pads in place put the block of wood in and compress with air as you mentioned or with a hydraulic pump like I did. I used the pump so I could keep them lubed with the brake fluid. Once you have them compressed, bleed the pressure and use the wood to push the pistons back in. Sounds like you're pretty hand so you may find a way that works better for you. As for the brake dust you mentioned in your other post. I think the PCCB's put off more dust than steel. I was disappointed because I was told they didn't put off much dust. The dust is gray and doesn't show up as much but I have black wheels so you see it right away. Your statement about the GT3 being a different animal is very correct. I've had several Porsches and it is different in almost every way. I've had mine for about 2 years now and I still learn new things about it all the time. I think I know more about it than my dealer now. They never see them and it takes a specialist to trouble shoot them. Good luck and if it doesn't work with the first one I wouldn't try another. I would rebuild it. Stick with the first one until the problem is resolved. If that doesn't solve the problem then it may be a master cylinder problem. But I believe the GT3 may have a front and rear master cylinder. I not sure though so you need to research that. Keep me posted Jermmy

I checked mine this morning after seeing your post. I have a small amount of drag. I would say less than half of what yours seems to be. Not sure if this is normal for PCCB's. I would check your pad wear if you haven't already. If there is still more than 50% pad left you may have sticking caliper pistons. This happens on cars that sit long periods of time. If you are good at doing your own maintenance you could pull your calipers off of the disc's and run them out all the way. Then compress them back in all the way. You may be able to feel if they are sticking and it may free them back up by moving them through their full travel. Hope I helped and if you find the problem or if this is normal please let me know. Jermmy

Mine made it to about 230 when I was stuck in a traffic jam. I haven't had any issues since and it's been about 4000 miles.

Hi Paver. Welcome to the forum. Loren is right in what he is telling you. I guessing that you are tracking you car if you are changing pads and rotors already. I was wondering where you live in Alabama. I'm in south Alabama. Message me if you want and maybe we can get together to compare cars. I have a 2011 GT3 as well and I would love to see yours if we are close enough to one another.

I'm not sure but I would think that you would have rubbing issues. You could go with a normal Michelin road tires. They have pretty good grip. That would be my choice if I wanted wet grip and still good proformance. That sucks though about the back order the Corsa System tires. That is what I have on my GT3. I love them. They take a lot to warm up but the grip and wear is great for a track tire. I will remember to order mine way before I need them. I have about 5000 miles on mine now and they still have plenty of life left in them. I haven't done a track day yet though.

That's correct aehsani. I did not have the dynamic mounts. From what I have read they are a good compromise but they still don't give you the feel of soild mounts. I think in a Carrera or a Turbo the dynamics would be the way to go because you could keep you ride quality but for a GT3 I believe the solids are best. :D

I've always run mine halfway up the dip stick, That's when the cars still had a dipstick, lol. I never had any oil loss but I think I have just been lucky. I'm sure there are lots of palces the oil is leaking past but the only common place I have ever been told is the valve guilds. Porsche builds there engines lose to make more power. If everything was tight enough to seal completely it would put more drag and restriction on the engine. That's why a formula 1 car uses a gallon or more in one race.

I was told that it take about half a tank of fuel run through the car before the DME builds a new map to take advantage of the higher octane. I'm not sure how true this is or if it's the same with the older cars. Maybe someone else can confirm this. Either way just make sure that it is unleaded and you shouldn't have any problems.

98 octane is as high as you would need to go. Anything higher is a waste in your car. Like Logray was saying, there is an improvement but you would probably need a dyno to see it. Seat of the pants I doubt it. The best thing to do at the track is get a proper corner balance and ride height. Also strip as much weight as you can. You will see a much bigger improvement on the track.

Nice looking car. I can't recommend a winter tire because I've never used them but this is a link to Porsche TSB for your car. Overview of Winter Tires, Wheels and Snow Chains (C4, C4S) If the link doesn't work you can get to it in the DIY TOOLS at the top of the page.

Yep. The Porsche battery is very nice in every way but it's not $2800's nice. It also weighs 12 pounds. The next cheapest lithium battery I found that would start my GT3 is $1050. It has a prettier package but it does exactly the same thing.

Glad I could help and that's all it was. Merry Christmas :)

If the alarm has been armed for over a couple of days you will need to use the key in the door to unlock it and reactive the cars systems. The car deactivates it's systems and goes into a standby mode. Once you unlock the door with the key, you will need to put the key in the ignition quickly or the alarm will sound. Hope this helps.

Yes, I checked it while it was running and it was maintaining 14.5 volts. With the car off it was holding 13.5 volts. Lithium batteries charge much quicker than lead and they hold a higher voltage too. The only problem with a battery this small is that you will need to keep it on a battery maintainer if the car is stored for more than a few days because it doesn't have the reserve capacity of the large lead battery.

The top 2 pics are the mods I made to the battery tray. Just all-thread and aluminum flat bar with heat shrink around it. Fits perfect and fairly easy to do. Jermmy

Hello all, I installed a new lithium battery today. I can't say much about how good it is yet. I can say that it starts the GT3 no problem. The OEM battery weighed in at about 42.5 pounds. The Lithium battery weighed in at just under 6 pounds. Very nice weight savings. :) I had the battery custom built by a guy at Lithiummoto.com. The guy is very knowledgable and helpful. His prices are much better than the big brands. The battery was $600. As you can see by the pics, he hand builds these batteries. So if pretty is your thing, then you might not like his stuff. I know what a lot of you are going to say about taking a chance on an unproven battery manufacturer. I have done my research and I know a good bit about batteries so I am will to take the risk. I will keep updating this post as I get more time and miles on it so everyone will be able to follow it's reliability.