senna

Too low with 19"s for the street.

Also, I got some fault codes from the shocks. We cleared it out once and it hasn't happened again. With this setup I cannot even get the low profile jack under the car without using my ramps to bring the car up a few "s. this is issue is mainly using the 18" instead.

I hope this helps....

mdrums

Senna, your NT01/RA1 combo 18's with the tires you are using are right at at the same overall diameter as your 19".

Dog....just for reference...245/40/18 is the same overall diameter as 235/35/19 and 305/35/19 is .2" less overall diameter than 305/30/19. I cross ref'd this with Toyo, Michelin, Pirelli.

Remember when you change tire sizes all around your cars ride height measured from the parts in Trakcars photo of the Porsche Workshop manual changes.

To see what I am talking about go to tire rack.com and look at the overall diameter of the various tires you are running compared to what came stock on your car. If you deviate from that stock overall diameter specs your right height changes so be aware of the front to rear overall diameter difference in track tires.

senna

All I am saying is, I found my current ride height very low for the street. I never had an issue with what it was before. 110mm front and 137mm rear.

GT3DE

car must be setup on the tires you plan on running at the track.
leave the front alone, drop the rear.
picture is is of setup my 2010 GT3 (ignore thing that says 2004)

deputydog95

Where do you get factory specs for my model to have as a baseline?

mdrums

Owners manual is supposed to have your ride height specs and alignment specs for street and track.

Clark what size tires are you running and what was ride height specs in millimeters at the measuring points?

85Gold

Dawg

Yes your car is high and as mike said Porsche spec is based on stock tire size. If you are running a shorter tire you can run lower ride height than spec but IF you over lower a car you can have serious handling and bump street issues. Your car with its new massive rear wing would also run a different rake than a normal non aero car. All this means get off your wallet and get a competent shop to set your ride height and corner balance. You will be glad you spent the $$. Thus is not a job for a shade tree mechanic.

Peter

deputydog95

I have someone competent to do it. But I prefer to do my homework first.

mdrums

Dog is Bob at Vortex doing the ride height and alignment?

85Gold

I can see it now, Dawg walks into Race Shop and says I want my car set like this as I read it on Rennlist so it must be right. Race shop no problem I'm sure they know more about set up then we do.

Peter

deputydog95

I have a small race shop in Sarasota that does ride height, alignments, and corner balancing. I just need to tell them what I want and they'll do it.

I don't plan on taking the podium at the 12 hours this year, so close is good enough. It's just a bear to get it up to Vortex in Tampa with my wife traveling so much.

mdrums

Is that the final alignment...they could get it closer

Mvez

The 997.1 spec of 108f/133r is correct.

There are operating ranges for all shocks, and with super low stock front rates, excessive front lowering is asking for bad handling traits. You can accomplish the same things by playing with bars and raising the rear end instead.

For 997.1, there is no need to ever go lower than 100 front. Since setting my car up at 100-102 front & 120-122 rear, the car is really, really good. I'm on 245-40-18 & 305-35-18.

I wouldn't take big swings, just change the rake by 5mm and you'll feel a difference. Making a 10mm change in either direction will probably be too far, depending on what you are trying to accomplish.

Rad's old setup threads are spot on for the .1/RS.

deputydog95

Peter had suggesting maintaining factory rake and lowering from and rear by 10mm. Sounds pretty reasonable.

Why did you lessen the rake?

deputydog95

I need to take some initial measurements. I've had a number of people (including the dealer) comment on how tall my car is. Maybe I got a weird ride height setup from the factory.