On a 997 S what kind of performance benefits would you get from 20 inch HRE P40 Monoblocks?

 

NONE. You get NEGATIVE performance from 20" wheels and tires. 20" wheels and tires are for show and NO GO...

 

Exactly. Besides a rougher ride, they weigh more, which will increase your sprung weight and reduce acceleration performance. That's why people go with 18's for the track.
People only do it for the looks.

 

Your right I just went from 18's that I have R compound on for the track to 19 street tires .the 18's felt like the handled better

 

it really will decrease the acceleration?? off the line or on the highway?

 

Between a total lack of understanding of the damage to driving dynamics the bling 20" wheels do to a true sports car, and people talking about the "breaks" on the car makes me sad for society as a whole. I am getting to where I can't even read 6Speed anymore because it is just too painful...

WTF has happened to the real enthusiasts? Or have they mostly walked away in disgust as well?

So sad.

 

FYI - if you do some hard research on this you'll find the 997 was originally conceived by the engineers to work around 18" wheels. Marketing said they needed 19s and won the argument. I've been reading some books on suspension dynamics and supposedly you can actually damage things by using wheels too big for the design. One example is the 964 Porsches that came with 16s and 17s. Porsche was very specific to instruct owners NOT to use 18s because of the dynamics issue. In order to fit 18s to the 964 Turbo they made changes to the car itself.

So, to take a car like the 997 that was created for 18s and modified for 19s and try to run 20s just doesn't feel like a good idea. Of course those that have 20s on them will say they work just fine, but I wonder about long-term (like 10+ years).

Best performing wheels, 18s like I have on my car for the track (Volk TE37s, forged, light, and strong). On the street, I run the OEM 997.2 stock 19s. I can feel the difference when my 18s go on, weight at the wheels is that bad.

 

Yep Stay away for the 20" wheels.

In my opinion the super skinny side wall not not look right on a performance car anyway.

If you are looking for more performance go with some forged 18" wheels.

 

20's work just fine on my 07 997 turbo..im running the champion rg5 wheels on ps'2s on the streets, and running 19'2 at thetrack...

 

the h&r springs and sway bars help out alot..

 

+++++++++++++++++++1.... IMHO 20's make the car look like its PIMPED OUT! The DONT help performance in any way, shape, or form!

 

++++++1 on this post! Sad part about this post is the original thread that sadboy is referring to is a pic of the hub on a turbo forum and the owner is calling his brakes, "Breaks". The owner has a center lock wheel option, and shows how a regular wheel wont attach. R U KIDDING ME......WTF?


https://www.6speedonline.com/forums/...els-photo.html

 

This!!! One foot out the door. This forum is being overrun by vendors, foreign vehicle fanboys, young kids, and 1000 hp people. Hardly many enthusiasts left. Very sad. But probably profitable for the owners.





However I sill way this, the stock Porsche wheels are not that light. I'm not sure about the 997 wheels but the 997 Turbo wheels are anvils and you can in fact get better acceleration with a custom light weight 20" wheel. They can be lighter, and wider.

Bigger Width + More Diameter = bigger contact patch. Add to that a lighter weight and there is no way you can lose.

It is not a forgone conlusion that a 20inch wheel will be slower than a 19. However it's very unlikely considering performance tire choices are better in 19 than 20 and the sidewalls will be very thin not allowing much flex for grip.

 

19 if you want to go with anything, you cant go wrong with what they give you from the dealership.....

 

IMHO.....take it for what its worth, I have seen 20 give NO indication of rolling at a high rate of speed in a turn.Nothing at all, until u r in the armco. NO " Talking"!. I say 19 or 18......NO more