LSD Setup Thoughts for Leeloo, Figuring out the choices |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
LSD Setup Thoughts for Leeloo, Figuring out the choices |
nine14cats |
Jul 28 2013, 04:02 PM
Post
#1
|
Bill Pickering -- 914-6 GT aka....Leeloo Group: Members Posts: 2,618 Joined: 10-February 03 From: Campbell, CA Member No.: 287 Region Association: None |
Hey Guys,
I need some advice for Doris' car on Limited Slips. We are putting the car down for the winter as it is getting some mods done over the next couple of months and I need to dismantle some of the car. Mods are: 1. Going to TCDesign in Sept/Oct for new cage with door bars for safety. The bolt in cage has the door bars too low to help with a collision. At the same time I will have Tony tie in the shock towers front and rear and add chassis stiffening. The cage will also be NASA/PCA Racing legal without using a Petty bar, which makes it more comfortable inside the car. 2. Roger Sheridan is making me up his lightweight front and rear lids along with a new targa top that will allow more room for Tony's cage. At this point I plan on going back in with the dash, door panels, and some carpeting to make the car more "stealth". 3. I have ordered 21mm hollow T-bars for the car and I have plenty of springs in the garage to try. I may bump the spring rate in back up a tad to 275lbs/300lbs from the current 250lbs to help with turning and then with the softer front end I can get some Anti Roll bar adjustability back as I have the front bar full soft and it still pushes. The car is way too stiff in front. 4. We are going to bias ply slicks for the setup. We will use R35 / R45 compound Hoosiers for AX/track and eventually move to Avons for AX. I'll also redo shock valving after I figure out the T-bar/rear spring rates. At that time I will have the spindles raised. That brings me to a limited slip/trans combo. Doris hates the 901 and remembers the 915 we had in our 930 (I had swapped the 930 4 speed for a 915 5 speed which was much nicer to drive around town). She liked that trans. I have a 915 box and will spring for a WEVO kit and flipping the R&P. So now I need to decide on a limited slip. The hot AX ticket is a Torsen style but it offers no help under braking on the track. I really liked the feel of our ZF style Guard on our previous 914-6 as you can feel it settle the rear end under braking in high speed situations. It made the car easier to drive. Since Doris will be driving the heck out of the car at DE's, I'm thinking a 40/60 clutch style from Guard. 40% lock up under power and 60% lock up under braking. That should tame the car in braking Thill or BW and still make the car hookup out of slow corners. What do you guys think? I'm trying to setup the car for her to enjoy and not make it a stiff race car like I would drive. Thanks, Bill P. |
brant |
Jul 29 2013, 04:42 AM
Post
#2
|
914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Paul guard admitted to me that in a mid engined car with low up the the could be faster on the track.
The reason we had that conversation is because a builder was telling me the same. |
nine14cats |
Jul 29 2013, 07:42 AM
Post
#3
|
Bill Pickering -- 914-6 GT aka....Leeloo Group: Members Posts: 2,618 Joined: 10-February 03 From: Campbell, CA Member No.: 287 Region Association: None |
Paul guard admitted to me that in a mid engined car with low up the the could be faster on the track. The reason we had that conversation is because a builder was telling me the same. Hi Brant, It appears your comment came out garbled. What did Paul Guard say? Thanks, Bill P. |
brant |
Jul 29 2013, 08:33 AM
Post
#4
|
914 Wizard Group: Members Posts: 11,632 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Paul guard admitted to me that in a mid engined car with low up the the could be faster on the track. The reason we had that conversation is because a builder was telling me the same. Hi Brant, It appears your comment came out garbled. What did Paul Guard say? Thanks, Bill P. I'm hating this spell check Paul guard admitted that on a low hp. Mid engined car. That the tb could actually be faster in lap time despite the feel of a clutch diff under braking. We went with a tb for 100percent track work. Our previous tranny was a welded diff. We ran it on the 4 and the 6. |
Lo-Fi Version | Time is now: 1st June 2024 - 02:15 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |