Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> New shocks are awesome
Joe Ricard
post Apr 23 2007, 10:57 AM
Post #1


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
Koni race 8610-1473 inserts in front
AFCO threaded aluminum Body Coilover 1473 out back.

Did a test and tune on crapped out Cantilevered slicks that no longer had any depth gauge holes.

We ran the car for nearly 4 straight hours. only shutting off to make an adjustment.
We learned that with the agressive rebound of the front shocks that the car would be held down on the front by nearly and inch after a run. I dropped the rear by that much. Gained a skid pad increase from 1.12 up to 1.21 sustained with consideraby more speed. Tweeked tire pressure and front rebound increase and went up to 1.27 with peaks of 1.31. We then started to tune throttle lift oversteer. Snapping the throttle closed and yanking the wheel and stabbing the gas just to see how we could get the car to hang out and rotate with power on.

We had to quit because it was making us sick.

Later in the day we set up a full autocross course and tuned some more with ride hieght down an 1/8" and made like 15 runns before we started to not be able top go any faster and could no longer put power down.

We thought at 1st we made some wrong adjustment. I waked to the back of the car looked at the tires and said Hey suspension is good. WE GOT STRINGS nearly 1/3 the way across the inside edge of the tire.
Put it on the trailer and called it a day. total success and we couldn't believe the tires lasted as long as they did.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Apr 23 2007, 11:18 AM
Post #2


914 Freak!
***************

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
That's so awesome! Sounds like a great day ( except for getting dizzy ).
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
grantsfo
post Apr 23 2007, 11:35 AM
Post #3


Arrrrhhhh!
****

Group: Members
Posts: 4,327
Joined: 16-March 03
Member No.: 433
Region Association: None
Sounds like a major improvement. Good work! What do you use to measure G's?

Since I have Traqmate its been fun to measure G's during track days. Doing skidpad testing would be very interesting. On the track my car was averaging 1.5 G's in some corners with some spikes as high as 2.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 23 2007, 12:27 PM
Post #4


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
Using G tech RR.
The new tires I have mounted up ready for Houston National tour should be very interesting. Going from R600 Goodyear cantilevered slicks with 4 lapping days and 80 AX runs to Hoosier FA slicks should be pretty interesting. We will get a couple practice on on Friday to make sure the surface agrees with our set up.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
charlesmac
post Apr 23 2007, 03:54 PM
Post #5


Member
**

Group: Members
Posts: 210
Joined: 27-June 04
From: Richland, MS
Member No.: 2,264
SWEEEEET!!!!!! you're gonna have to let me run it at least once again this year since i'm a loser and haven't done anything to get mine going yet. Where did ya'll go to do the testing?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Aaron Cox
post Apr 23 2007, 06:15 PM
Post #6


Professional Lawn Dart
***************

Group: Retired Admin
Posts: 24,541
Joined: 1-February 03
From: OC
Member No.: 219
Region Association: Southern California
pics of the rear setup?
i thought they were a double heim style shock.. jsut curious how you mounted them up top in the rear.

running em upside down also ?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
URY914
post Apr 23 2007, 06:26 PM
Post #7


I built the lightest 914 in the history of mankind.
****************************************************************************************************

Group: Members
Posts: 120,426
Joined: 3-February 03
From: Jacksonville, FL
Member No.: 222
Region Association: None
"...put it on the trailer..."???

Now you have a real race car. (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 23 2007, 07:06 PM
Post #8


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
I mounted the rear shocks with bolts. Big Effin bolts.
1.27 G's in the 1st pic. the 2nd one is launching out of a corner WOT 3rd gear near 6000 RPM. Hit the rev limiter of 6250 as it came straight out the exit gate. those are 200 lb rear springs.


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 23 2007, 07:08 PM
Post #9


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
crap it is fast


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
groot
post Apr 24 2007, 10:13 AM
Post #10


Dis member
***

Group: Members
Posts: 894
Joined: 17-December 03
From: Michigan
Member No.: 1,444
Great work, Joe!

I'm a bit surprised about your deltas, though. We do a lot of testing here and damping has only a very small effect on constant radius (skidpad) numbers. Tires, springs and bars are your hammers there.

Also, those tires must be pretty old (obvious since you corded them) because your absolute G numbers are a bit low.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 24 2007, 12:08 PM
Post #11


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
QUOTE(groot @ Apr 24 2007, 11:13 AM) *

Great work, Joe!

I'm a bit surprised about your deltas, though. We do a lot of testing here and damping has only a very small effect on constant radius (skidpad) numbers. Tires, springs and bars are your hammers there.

Also, those tires must be pretty old (obvious since you corded them) because your absolute G numbers are a bit low.


Yea, more of the story was we were starting with our old base line set ups before shocks. so the improvements were just getting the car balanced.
after we got the best we could out of constant state skid pad. then we started working on throttle lift oversteer and getting the rear end to be more predictable.

Yes I would say the tires were pretty hammered. being R600 cantilevered Goodyears I picked up used here (I think he said 3 or 4 heat cycles). I put 60 laps on them at NPR then subjected them to 4 driver back to back runs at an autocross totalling 65 runs. and then another event that we hammered on them pretty hard 15 runs. then this all day test and tune. When we started the day we had no visible depth holes.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 25 2007, 10:24 AM
Post #12


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
http://racingsynergy.com/Videos/100_0893.MOV My 914 at the test and tune
http://racingsynergy.com/Videos/100_0903.MOV .Friends RT-10
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Borderline
post Apr 25 2007, 11:21 PM
Post #13


Senior Member
***

Group: Members
Posts: 720
Joined: 8-February 05
From: San Juan Bautista, CA
Member No.: 3,577
Region Association: Northern California
Joe: where did you go to set up a skid pad and AX course and not get arrested? What radius did you use for the skid pad? Car looks awesome!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Ricard
post Apr 26 2007, 05:44 AM
Post #14


CUMONIWANNARACEU
*****

Group: Members
Posts: 6,811
Joined: 5-January 03
From: Gautier, MS
Member No.: 92
One of the local autocross regions does one of these 2 or 3 times a year. mostly at the beginning of the season and then before Nationals.
It's about 50 bucks but like I said we hard shut the car off for 4 hours.
and then there was the afternoon session of as many runs as you could stand.
Didn't measure the skid pad but it was close to 100 ft dia.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · The Paddock · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 7th May 2024 - 12:42 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
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 ...