RESULTS ARE IN - POST 49 - Upgraded Suspension bits - where is the gain in time?
#16
Rennlist
Basic Site Sponsor
Basic Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The problem with stiffer springs in the rain us that the load is transferred quicker. Unless your car is sprung too softly for dry conditions, this is exactly what you don't want in traction limited wet conditions. A more gradual transfer of load is much less likely to cause a loss of traction.
Scott
Scott
__________________
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.
#17
#18
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
^^^^^ I am running the same setup as Larry. Both are using R6's dry and Hoosier rains for the wet. My rain times do suffer a bit compared to a 900lb spring setup.
#19
Rennlist
Basic Site Sponsor
Basic Site Sponsor
#20
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Have you ever seen or felt any tire issues with that high of a spring rate or do you adjust the pressure up some over normal to offset any issues ?
#21
Rennlist
Basic Site Sponsor
Basic Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
As far as the rain tires, I wound up running them a couple of lbs below what the hot pressures were for my dry R6s and that seemed to give lots of grip. After a sprint and an enduro in the rain, they looked virtually un-worn.
#22
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
+1 on what Larry experienced. Keep in mind there are tenders on that setup that allow .5 inches of travel before you hit the big springs. Very easy on tires. I gathered the track record twice at Summit last year in GTS3 running tires with a dozen or so heat cycles on them. I am tossing tires before they even cord with this setup. Very happy.
#23
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
exactly. That's why in the GTGP race, my, generally, too soft set up was just right when we started racing in the rain. it makes the car a lot more controlable with low grip, even with the use of street tires, vs DOTs or slicks.
guys with slicks and the much stiffer suspension were having a lot more control problems.
I also was under the impression that with stiffer springs you dont need as much camber, because you dont get the body roll. Im sure this is geometry dependant to a great extent as well.
guys with slicks and the much stiffer suspension were having a lot more control problems.
I also was under the impression that with stiffer springs you dont need as much camber, because you dont get the body roll. Im sure this is geometry dependant to a great extent as well.
The problem with stiffer springs in the rain us that the load is transferred quicker. Unless your car is sprung too softly for dry conditions, this is exactly what you don't want in traction limited wet conditions. A more gradual transfer of load is much less likely to cause a loss of traction.
Scott
Scott
#25
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The problem I have run into was having too high a spring rate so the tires (DOT's) started deflecting more and caused some over heating tire issues. Maybe it's not an issue as much on shorter sprint races or in climates that are not as hot as we get down here.
None what so ever. I adjusted tire pressures "normally" based on temps and lap times, and the RSA was very gentle on them too. Would get about 20 very competitive heat cycles out of them before they would fall off.
As far as the rain tires, I wound up running them a couple of lbs below what the hot pressures were for my dry R6s and that seemed to give lots of grip. After a sprint and an enduro in the rain, they looked virtually un-worn.
As far as the rain tires, I wound up running them a couple of lbs below what the hot pressures were for my dry R6s and that seemed to give lots of grip. After a sprint and an enduro in the rain, they looked virtually un-worn.
#26
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Actually I can remember one such situation where this does happen. T2 at WG with the massive camber it has did rip up my weighted tire. Summit not a problem and I ran that race in 90deg heat.
#27
Rennlist
Basic Site Sponsor
Basic Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Interesting. I ran my Hoosiers on relatively wide wheels 9s & 10s for their respective sizes (245s & 285s) and fairly hard. I found that the best grip was with pressures in the 38-39 lbs range, but at that point a further increase of one or 2 lbs would cause them to go off, so I usually went for hot pressures of around 37 lbs to give myself some margin.
#28
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Ever run in the heat ? Or for longer races ?
How much did your car weigh ? Was it the white RS ?
How much did your car weigh ? Was it the white RS ?
Interesting. I ran my Hoosiers on relatively wide wheels 9s & 10s for their respective sizes (245s & 285s) and fairly hard. I found that the best grip was with pressures in the 38-39 lbs range, but at that point a further increase of one or 2 lbs would cause them to go off, so I usually went for hot pressures of around 37 lbs to give myself some margin.
#30
Rennlist
Basic Site Sponsor
Basic Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
![EEK!](https://rennlist.com/forums/images/smilies/eek.gif)