Rebound Adjustment
08-19-2008, 10:52 PM
#32
Rennlist
Basic Site Sponsor
Basic Site Sponsor
It depends on what you mean by "not rotating enough". Does it feel tight through the entire turn? If so, you need a more overall adjustment like tightening the rear swaybar, or stiffer rear springs. If it feels good mid-corner and on corner exit, then tightening the rear rebound will momentarily loosen up the back end when you turn it into the corner.
__________________
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
08-19-2008, 11:03 PM
#33
Rennlist Member
Nah...dude, we are gonna have fun in that low HP car, believe me! And Larry is spot-on regarding over braking. Heck, I still catch myself doing it occasionally into Rattlesnake.
08-20-2008, 11:14 AM
#34
Race Director
All true in a vacuum. However, also realize that compression settings affect how quickly the rear of the car squats under acceleration, and how the front dives under braking. Rear rebound affects how quickly the front loads up under hard braking, which is also affected by front compression. See? So they are all interrelated.
Viking, that one flower...mama mia!!!
Viking, that one flower...mama mia!!!
08-20-2008, 11:17 AM
#35
Rennlist Member
08-20-2008, 11:23 AM
#36
Rennlist
Basic Site Sponsor
Basic Site Sponsor
That's why I gave up on them 25 years ago. At that time, the rebound adjustment was touted as being an means to compensate for "shock wear", not specifically as a performance enhancement.
08-20-2008, 11:44 AM
#37
Race Director
944 spec rules allow only the Koni Sports. This keeps costs down. Good for an entry level class like ours. I have been racing this car for 6 year and driving it on the track for 8. Never really played around with adjustments other that that one time. Right now I am thinking about tweaking things where I can. Maybe I can gain a few tenths. As it stands I can adjust sway bars and rebound fairly easily. I can also adjust aligment and ride heights. I think I have it well dialed in, but knowing what rebound could do can be helpfull as it takes seconds to adjust the fronts and 20-30 mintues to do the rear since I need to pull the shocks to do it. Slower than a sway bar adjustment, but quciker than an alignment change.
08-20-2008, 12:04 PM
#39
Rennlist Member
944 spec rules allow only the Koni Sports. This keeps costs down. Good for an entry level class like ours. I have been racing this car for 6 year and driving it on the track for 8. Never really played around with adjustments other that that one time. Right now I am thinking about tweaking things where I can. Maybe I can gain a few tenths. As it stands I can adjust sway bars and rebound fairly easily. I can also adjust aligment and ride heights. I think I have it well dialed in, but knowing what rebound could do can be helpfull as it takes seconds to adjust the fronts and 20-30 mintues to do the rear since I need to pull the shocks to do it. Slower than a sway bar adjustment, but quciker than an alignment change.
08-20-2008, 12:33 PM
#40
Race Director
Rules only allow for 2 part numbers. One for early steel trailing arms and the other for aluminum trailing arms. Neither have external adjustments.
So something is better than nothing as Larry said. That is one reason we allow adjustable swaybars. These are the most adjustable part of the car at the track and allow some ability to dail in the car for needs that day. Some spec classes like to lock down every last detail, but I think it better to have some adjustment range on things since not everyone is going to want to have their car's balance just like everyone else. Sways are an easy way to allow for that. As for the Koni's there are pretty common off the shelf parts at reasonable price. They rebound adjustment is nice to have, but not a requirement for the class. In fact too many adjustments in an entry level class like ours will just lead to a infinite number of set-up issues and more gap between the newer guys and more experienced ones. As some else stated many adjusments often means more wrong settings.
For the most part 944 spec cars can be built following a list of parts and basic alignment setting that we share. This gets the cars "in the ball park" and then leave enough room for drivers to tweak things to their liking and to tweak as their skill level improves.
08-20-2008, 12:55 PM
#41
Burning Brakes
It depends on what you mean by "not rotating enough". Does it feel tight through the entire turn? If so, you need a more overall adjustment like tightening the rear swaybar, or stiffer rear springs. If it feels good mid-corner and on corner exit, then tightening the rear rebound will momentarily loosen up the back end when you turn it into the corner.
Thanks for the input Larry. I wil bug Dave at the next DE when I go play and break in the new motor..hope nobodys notices the X51 boxster motor I put in.
Chris
08-20-2008, 03:38 PM
#42
Rennlist Member
I think the biggest problem is my driving style. I got real lazy driving the cup car and now have to re-learn my good habits from the 914 days and actually drive the car.
Thanks for the input Larry. I wil bug Dave at the next DE when I go play and break in the new motor..
Thanks for the input Larry. I wil bug Dave at the next DE when I go play and break in the new motor..
08-20-2008, 03:39 PM
#43
Rennlist Member
08-20-2008, 06:39 PM
#44
Burning Brakes
08-20-2008, 06:58 PM
#45
Rennlist Member
FYI....my boyz and I have major skillz in "employee relations". You should consider outsourcing all these pesky tasks...
