Slick tube valve stem question

[gt350hr]

     When I was concerned about leakage , I would  wipe down the inside with Dawn dish soap . Not to the point where it would run but the idea was to clog any minor porosity without damaging the rubber. It certainly reduced the seepage and most of the time eliminated it. It might just be a "lucky" set of tires that didn't leak even without the treatment ( being realistic).
  Randy

[AlanCasida]

Got my new "sleeks" today. You can really see the difference between the regular sidewall M/T and the stiff sidewall Hoosier. I hope they will hook up better. I don't really like sowing up for RMRW 2.0 with new slicks but it is what it is.

[Rory428]

I stopped running tubes in my slicks about 30 years ago, my Fairmont goes 132 MPH in the 1/4 mile, with 10 PSI...

Only 10 PSI, and no wandering? That makes me wonder why mine does. I still have the stock rear leaf hangers, so that may be what's causing mine to wander? I was going to use a set of reinforced hangers when I made some changes, so maybe that will cure it. The shocks are set evenly.

Doug, keep in mind, I am running 13" wide slicks, on 14" wide rims, the narrower the wheel/tire combo, the more air you need.Also, what are you using for front tires? I am running either Moroso or M&H "skinnies", which are bias ply, at usually 5 to 40 psi.

[cjshaker]

I stopped running tubes in my slicks about 30 years ago, my Fairmont goes 132 MPH in the 1/4 mile, with 10 PSI...

Only 10 PSI, and no wandering? That makes me wonder why mine does. I still have the stock rear leaf hangers, so that may be what's causing mine to wander? I was going to use a set of reinforced hangers when I made some changes, so maybe that will cure it. The shocks are set evenly.

Doug, keep in mind, I am running 13" wide slicks, on 14" wide rims, the narrower the wheel/tire combo, the more air you need.Also, what are you using for front tires? I am running either Moroso or M&H "skinnies", which are bias ply, at usually 5 to 40 psi.

I'm running the bias ply MT skinnies on 4" rims. Your rear tire width on even wider rims probably helps in how stable yours are. Mine are on 2" narrower rims because they didn't come any wider, and I wanted those rims. I know that's not good for sidewall flex.

I'm kind of shocked at Alan's pictures of the sidewall flex. I was under the impression the MT's were stiff, for stick cars, but I've noticed how much mine collapse on launch, then rebound. I may need to rethink my tires and whole rear set-up as I still have launch issues. Being Alan is running an automatic, they may actually help him.

[cjshaker]

I'm sure I'm not the only one who's done the "Dawn" trick on old slipping automatic transmissions. A tiny amount will soften up the seals and make them shift better....for a period of time. It never "Dawned" on me (see what I did there  ) to try it in one of my tires that seeps.

[AlanCasida]

I'm kind of shocked at Alan's pictures of the sidewall flex. I was under the impression the MT's were stiff, for stick cars, but I've noticed how much mine collapse on launch, then rebound. I may need to rethink my tires and whole rear set-up as I still have launch issues. Being Alan is running an automatic, they may actually help him.
[/quote]
M/T makes a stiff sidewall slick in this same size (28x10.5) but it is still not as stiff as the Hoosier.

[cjshaker]

M/T makes a stiff sidewall slick in this same size (28x10.5) but it is still not as stiff as the Hoosier.

That's what I used, so they probably don't flex as much as your picture shows, and I don't recall mine flexing that much when they were dismounted.

Sorry to sidetrack your thread, Alan.

[AlanCasida]

Well I got my slicks mounted and I decided to go tubeless but I think I am going to go ahead and use bead screws. I wiped the inner sidewalls down with Dawn and I also put High-Tack on the bead to make it stickier.   

Thanks for all the input, guys. I REALLY appreciate it!