This is the first car I have ever ran something other than slicks on. Trying out some 275 50 15 M/Ts.

What a good baseline to start with a full weight car?

 

I'm running 12-13 lbs, if I were you Id start at like 18 lbs and dropdown from there. At our lousy track in Orlando, we call it "Orlando Spin World", the traction sucks, they are yoo cheap to prep it properly.

 

i personally ran my best 60 at 21-22 psi with the 275/60/15 m/t on an 8" rim. i was only going 1.47 60' but dead hooking.

i have seen other guys go lower that are running 1.3 60' times. for me, when i went low i spun.

 

i run them about 18...but i also drive them to the track and home

 

i started at 17.5 and dropped it from there

 

I was running 22 PSI and though I got an occasional perfect launch with no spin, it was a hit and miss proposition in my car. I dropped down to 18 PSI, heat the tires really well and now they hook every time. 1.591 60' time now which is right there with my best time on slicks. I launch at 2800 RPM against the converter and pretty much mat the gas off the line. Mine are 275/50-15's mounted on Bogart Welded RT's that are 9.75" wide.

 

21 psi, 1.41 60' is my best so far.

 

+1 higher psi worked for me....22 psi and 1.483 60'

 

12-13 is too low IMHO.

I can't help myself but to comment everytime I see someone complain about OSW. Could they prep it a lot better... absolutely! Could you put as much into your suspension as you do trying to make power? Probably a better approach than blaming a track.

 

I am with GATOR and DSG 21-22 psi 1.520 60fts.

 

22 Psi

 

You guys that are running 22 PSI all the time, is that hot or cold? I think I'm going to try going back up to 22 PSI again tonight and see what happens. Temps in the mid 90's today so I'm probably not making enough power to spin the tires anyhow.

 

Most always state a cold measurement since hot psi will fluctuate based on how hot the tires are.

 

True,cold.

 

my pressure measurements were cold. but i did notice that the tire pressure didnt change too much from teh time i did a burnout to the time after the run (pulled off as soon as i got my timeslip).

 

I run very different tire pressures depending what track I am at. of our 2 local tracks, one I can run between 22-24psi depending on track temp where as the other track I tend to run 18-20 psi max. I have also found that anything under 17psi the tires begin to go away on me so if I get to 17 psi and still don't hook I just call it a day.

 

I don't see how you guys can launch at 20-22 psi and get any traction. Launching, at the track I go to, over about 3,000 rpm, all I do is bounce off the rev limiter. Pinks did a few segments at Orlando Speed World and one guy in a Vette almost hit the wall the traction was so bad.

 

You have quite the long list of engine mods in your sig and from what I can tell 1 suspension mod. What else have you done for the hook department?

BTW, Strobel's Vette can click off 7's.

 

14-15 psi works best for me.

 

17, pump them to 30 when I drive around on them