Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Lemikson

Contributing Members
  • Posts

    3
  • Joined

  • Last visited

Everything posted by Lemikson

  1. Many THANKS and a loud shout-out to Porschelibrarian from this forum on a such prompt and detailed assistance with all the needed info and material that is going to help me make a call on a nice 06 997 C2S! Great stuff from him like always and very much appreciated.
  2. Hi cannon1000, may I ask you to reconfirm Conti DWs you have (had) on your 996tt? 225/30/18 does not exist - was this a typo?
  3. A new owner of 02 996tt with a question about the tires and acceptable rolling diameter differences between the front and rears. I apologize for bringing this question again, did an extensive search here and on rennlist and I am finding a bit of a conflicting information. So far, looks I have come to conclusion that the front to rear tire diameter difference within 2% is predominantly acceptable by forum users that appear to be knowledgeable and factual. Some of them are actually stating to stay within 1% max. But, then I ran into a replay to similar post from a very reputable member who is claiming “as a rule of thumb difference up to 4% is acceptable”!!!. One of the explanations for 1% or less that I have found is that the original P-design setup was with 3 revolutions per mile difference (832 @ R and 829 @ F) which is 0.3 % diameter difference (616 mm (24 ¼”) R (~ 24 3/8” ) and 618 mm F) – almost identical rolling diameters between the axles. I did not have a chance to check for available information in P technical publications to find any design/engineering rational for such interpretation of the original set up. Now, if you allow for 2% diameter difference you are ending up with almost 7 times as much spin differential in the VC, not to mention 13 times as much at 4% diameter difference. 4% also sounds a bit large as the axle center would go up for almost a half inch with the tire diameter increased for 1 inch one over the other (4% at 25.5” reference diameter). I might be wrong on all of this, and I again I did not have a chance to check in P technical publications. I apologize on a long note and appreciate any clarifications and advice as my plan is to try to come up with some out-of-ordinary tire size combinations within the 18`OE rim constraints (strictly driven by limited choices I have here in Canada, plan to control my budget and idea to get started with a good ``starter`` street tire that is not Michelin PS2 :D and slowly to start learning the car - would like to go with Conti DW or Super Sports but struggling to figure out correct sizes ). Thanks.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.