 LSD recommendations, LSD reccomendations |
|
|
|
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. |
|
|
| Charles Freeborn |
 Nov 5 2019, 05:08 PM
Post
#1
|
|
Member  Group: Members Posts: 250 Joined: 21-May 14 From: United States Member No.: 17,377 Region Association: Pacific Northwest  |
Greetings.
While my engine is out for top end refresh I'm also planning on installing a limited slip diff. What have people run and why? Obvious choices are Guard (true LSD) Quaif, Wavetrac (Torque bias). Pros / cons of those types? I've heard the TB is easier on the rest of the gearbox. Not too concerned about having to run LSD additive as the fluids get regular service anyway (every event). Quick rundown of the car: 100% track use (not street legal) Little to no AX - all road course. 2.0L 4 cyl with fairly extensive mods. Estimated hp around 150. 901 side shift with AFKSX gearsets. Car weighs approx 1700 lbs (18 & change with me in it) Currently running Toyo RR 225/50 slicks. May step up to Hoosiers if I get more serious about racing. I've got another set of wheels for running in the wet with R888R's. Not great rain tires, but that's what's on those wheels now. When they're done I'll probably switch to RA1's. Thanks! |
   |
 
|
  |
Replies
| brant |
Nov 7 2019, 02:00 PM
Post
#2
|
|
914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
|
Hi Charles...
a touchy subject actually there have been lots of previous arguments over what is best. when I was trying to make the same decision for myself... I had a conversation with Paul Guard years ago... he told me that in a mid engine car the TB could be faster... this was in response to my pointing out that the clutch LSD was the defacto and widely publicized as the best differential for track use Paul pointed out that this was absolutely true on a 911 rear weight bias I went with the Quaif on my vintage racer teener. Prior to the Quaif about 8 years ago... I previously raced (for about 5 seasons) a 2.0 (AJRS motor) 4cylinder 914 with a welded-locked diff. It was different but ultimately faster than an open diff. Took me a little while to learn how to drive it since it was so different. |
|
|
|
| Charles Freeborn |
Nov 7 2019, 11:52 PM
Post
#3
|
|
Member Group: Members Posts: 250 Joined: 21-May 14 From: United States Member No.: 17,377 Region Association: Pacific Northwest |
Forgot to mention engine and trans built by AJRS roughly 15 years ago. Car was campaigned as a PCA racer in GT5S class. I'm more interested in vintage so some of the aero and other racer bits will come off, but the core driveline is solid and will stay.
QUOTE(brant @ Nov 7 2019, 12:00 PM)  Hi Charles... a touchy subject actually there have been lots of previous arguments over what is best. when I was trying to make the same decision for myself... I had a conversation with Paul Guard years ago... he told me that in a mid engine car the TB could be faster... this was in response to my pointing out that the clutch LSD was the defacto and widely publicized as the best differential for track use Paul pointed out that this was absolutely true on a 911 rear weight bias I went with the Quaif on my vintage racer teener. Prior to the Quaif about 8 years ago... I previously raced (for about 5 seasons) a 2.0 (AJRS motor) 4cylinder 914 with a welded-locked diff. It was different but ultimately faster than an open diff. Took me a little while to learn how to drive it since it was so different. |
|
|
|
Posts in this topic
Charles Freeborn LSD recommendations Nov 5 2019, 05:08 PM
wndsrfr I just put in a Guard for my /6 track car--all roa... Nov 6 2019, 06:10 PM
Charles Freeborn
I just put in a Guard for my /6 track car--all ro... Nov 7 2019, 07:29 PM Charles Freeborn I'm leaning towards a TB unit too - or just le... Nov 7 2019, 07:33 PM campbellcj I went with a Quaife TBD many years ago for same r... Nov 8 2019, 08:18 AM stownsen914 Two disadvantages of the TB differentials:
1. No l... Nov 8 2019, 08:41 AM jd74914
...the conventional LSD's impact on low-speed... Nov 12 2019, 06:15 AM yeahmag The Wavetrac is unique in the TB LSD world. Check ... Nov 12 2019, 12:12 AM jd74914
The Wavetrac is unique in the TB LSD world. Check... Nov 12 2019, 06:06 AM yeahmag
[quote name='yeahmag' post='2761433' date='Nov 12... Nov 12 2019, 10:00 AM stownsen914 I've been wondering who was going to come up w... Nov 12 2019, 01:58 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 19th May 2024 - 01:06 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.