Inside wheel lift - tire pressures?
06-02-2004, 05:10 PM
#19
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Great shots!!
Better drop the rear a bit. even high for a street car. It will help handling quite a bit.
Mk
Better drop the rear a bit. even high for a street car. It will help handling quite a bit.
Mk
Originally posted by shaaark89
after passing a gt3
after passing a gt3
06-02-2004, 05:25 PM
#20
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mark,
already been done. those shots are from last fall. since then, the car has been dropped all around though moreso in the rear. also changed from the stock wing to a more effective one and removed some graphics (as well as some paint in an argument with some armco.) tires are goodyear eagle gs-cs which i run at 27 to 29 psi cold.
already been done. those shots are from last fall. since then, the car has been dropped all around though moreso in the rear. also changed from the stock wing to a more effective one and removed some graphics (as well as some paint in an argument with some armco.) tires are goodyear eagle gs-cs which i run at 27 to 29 psi cold.
06-02-2004, 06:40 PM
#21
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Sounds good.
those tires in back look huge, what are you running front and rear? fenders look pretty stock in front so 275s in front?
I actually raised my stock wing. (and have been raising it every season by about 1" , to now over 3" high. it seems to work well, but no where near the downforce of the speedGT wing!@. however, no where near the drag either (that could actually hurt our mouse motor 5 liter engine performance package , more than the 6.5 liter bunch)
mk
those tires in back look huge, what are you running front and rear? fenders look pretty stock in front so 275s in front?
I actually raised my stock wing. (and have been raising it every season by about 1" , to now over 3" high. it seems to work well, but no where near the downforce of the speedGT wing!@. however, no where near the drag either (that could actually hurt our mouse motor 5 liter engine performance package , more than the 6.5 liter bunch)
mk
Originally posted by shaaark89
mark,
already been done. those shots are from last fall. since then, the car has been dropped all around though moreso in the rear. also changed from the stock wing to a more effective one and removed some graphics (as well as some paint in an argument with some armco.) tires are goodyear eagle gs-cs which i run at 27 to 29 psi cold.
mark,
already been done. those shots are from last fall. since then, the car has been dropped all around though moreso in the rear. also changed from the stock wing to a more effective one and removed some graphics (as well as some paint in an argument with some armco.) tires are goodyear eagle gs-cs which i run at 27 to 29 psi cold.
06-03-2004, 12:18 PM
#23
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Re: Inside wheel lift - tire pressures?
Originally posted by Cameron
I had my warm tire pressures set to 36 psi front and 44 psi rear (I have to check my notes to confirm).
I had my warm tire pressures set to 36 psi front and 44 psi rear (I have to check my notes to confirm).
Sorry to un-hijack the thread...
06-03-2004, 04:30 PM
#28
Rennlist Member
That makes sense! But, thats what DK was doing and he tossed his tires thinking they were cooked. I picked them up out of the garbage and they are awesome! (he was runnign too much pressure too!) Laguna is demanding on tires. I got them, the outside edges are not even worn. Im sure your temps are ok, and you are probably testing them in the pits after your session. trust me, and most all racers. 44psi with a hoosier hot, is way too much . but if you want to stay there, your leaving some big time on the table. There is a reason your temps are even across with 44psi, because it forces the tire to shift wear and temp to the middle. with a hoosier, it results in even temps across. thats what you DONT want. you want a 5-10 degree progression across the tire for it to be working well
try 30psi cold / 36hot and check temps and get back to us.
by the way, im getting 175F temps after a cool down lap and 5 degrees from the inside middle and outside of the tire down to 165F.
tell me when your fronts cord on the inside edge.
there is a reason Mark A and I are running 1.5 front and 2 degrees rear camber! 2 wont kill you in front, it will just cord the inside edge faster.
However the reason you may not be seeing that, is that your pressure is so friggen high! try and lower the pressure, watch your lap times go down. You then may need to take a little camber out of the fronts.
mk
try 30psi cold / 36hot and check temps and get back to us.
by the way, im getting 175F temps after a cool down lap and 5 degrees from the inside middle and outside of the tire down to 165F.
tell me when your fronts cord on the inside edge.
there is a reason Mark A and I are running 1.5 front and 2 degrees rear camber! 2 wont kill you in front, it will just cord the inside edge faster.
However the reason you may not be seeing that, is that your pressure is so friggen high! try and lower the pressure, watch your lap times go down. You then may need to take a little camber out of the fronts.
mk
Originally posted by John Veninger
44 psi HOT with Hoosiers. -2 degree camber all around. Even temperature and wear.
44 psi HOT with Hoosiers. -2 degree camber all around. Even temperature and wear.
06-03-2004, 05:02 PM
#29
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tell me when your fronts cord on the inside edge.
So how can one 928 on slicks and one on Dots have the same settings and both are getting full advantage on their setup?
06-03-2004, 05:09 PM
#30
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From Hoosier:
Reference the following chart for suggested pressures:
Vehicle size
Recommended Hot Pressure Cold Pressure
1800-2200 lbs.
39-42 30-36
2200-2600 lbs.
40-43 31-37
2600-3000 lbs.
42-46 32-37
over 3000 lbs.
43-48 32-38
Higher pressures will improve the performance capability but will require a more sensitive feel to take advantage of the increase.
One characteristic of the Hoosier P-Metric radial tires is the tendency to "skate" initially (when inflation pressures are correct). It is important to resist lowering the pressure to attempt to eliminate this feeling. Dropping the pressure may improve the "feel" of the tire however it will also lower the performance and increase the wear on the tire, particularly on the outside tread edge.
The above chart is a general recommendation which is intended for a standard configuration vehicle (i.e. front engine, rear wheel drive).
Reference the following chart for suggested pressures:
Vehicle size
Recommended Hot Pressure Cold Pressure
1800-2200 lbs.
39-42 30-36
2200-2600 lbs.
40-43 31-37
2600-3000 lbs.
42-46 32-37
over 3000 lbs.
43-48 32-38
Higher pressures will improve the performance capability but will require a more sensitive feel to take advantage of the increase.
One characteristic of the Hoosier P-Metric radial tires is the tendency to "skate" initially (when inflation pressures are correct). It is important to resist lowering the pressure to attempt to eliminate this feeling. Dropping the pressure may improve the "feel" of the tire however it will also lower the performance and increase the wear on the tire, particularly on the outside tread edge.
The above chart is a general recommendation which is intended for a standard configuration vehicle (i.e. front engine, rear wheel drive).