Goodyear Polyglas pressure?

[VintageMusclecar]

I know this subject has been touched on in the past, just looking for what the current trends are.

For reference, I'm running F70/15 on a 15X6 up front and L60/15 on a 15X8 in the back. Currently running 32 lbs on all 4 corners.

I managed to get the car out for a brief drive yesterday (first time since I got it back from alignment over a month ago, fwiw). I got after it a little bit, and <span style="font-weight: bold">much</span> to my surprise, it actually hooked <span style="font-style: italic">surprisingly</span> well in 1st and 2nd gear (albeit from a slight roll).

Just wondering if I might be able to bump the pressure(s) up some to help with road feel w/o losing the hook.

Thanks as always.
Eric

[Salvatore]

I run 28lbs in my L60's and 30lbs in my E70/15's up front. 15X 6 up front and 15X7's in the rear. Cragar SS mags. The nylon thumpers are to hard. I like a somewhat softer ride. All lbs. are measured in a cold tire.

[VintageMusclecar]

Thank you Sam.

[Survivor 69/Z28]

I have been told to run 26-28 in my poly's but 32 in my heavy Chevelle SS seems to feel the best to me. I run 32 in the fronts on my Z and 30 in the rear. With no PS the extra air in the fronts help.

[WILMASBOYL78]

I think Rob Clary told me to run a higher pressure in the rear tires when drag racing...seem to recall 44lbs..??? he has a lot of experience with this...check with him.

wilma

[ORIGLS6]

At least two schools of thought on that subject.
Higher air pressure can give you a more solid pattern across the width of the tire, but it can actually reduce the longitudinal contact area. Lower pressure will most likely show a strong pattern along the outside edges of the tire and lighter pressure near the center, but your longitudinal area and overall contact area will increase.
Just don't go too low on pressure or the car gets a little squirmy at speed.

[COPO PETE]

If your going racing..... 45 in the back, and 50 in the front.
Do a burn out and check for consistant blackness, or use a temp gun and make sure the temp is the same across the face of the tire.
Peter

[VintageMusclecar]

Thanks again guys, looks like I have some testing to do...eventually.

[Salvatore]

my settings are more for comfort. More air in the back like these guys have said and I know YOU know Eric will give you more rubber generally on the pavement. If you are really interested in drag racing and getting some decent et's throw a pair of slicks on and pump the fronts up to about 40-45 lbs. JMO I also know anything that you break you can fix so go to it! How about a video?

[VintageMusclecar]

I am looking to maximize hook, and if I can get rid of a little of the bias <span style="font-style: italic">road wander</span> with higher pressures, I'm all for that as well.

Ride comfort is subjective I suppose...I guess I'm willing to put up with a more &quot;cantankerous&quot; ride than most people, but then again I'm not looking for a Lexus feel from a 45 year old musclecar with squishy drag shocks and bias ply tires. <<GRAEMLIN_URL>>/wink.gif <<GRAEMLIN_URL>>/grin.gif

I'd love to get some video up, but time is a serious issue for me at this point as I have little to none to myself now that dad is here and we have to keep a 24/7 watch on him. I've not yet found anyone (at least anyone I'm comfortable to trust) to help Rachel and I with watching him so we can get our own things done, and I'm only able to grab a little time here &amp; there out in the shop to get work done. As things are now Rachel and I have to take turns between watching him and doing errands.

I'll get things sorted out one way or another, I just don't know how or when yet.

[Salvatore]

I know what you mean Eric. Elderly care is harder than raising children IMO. very, very time consuming.

[SmallHurst]

I have maintained 26 lbs in my F60-15's. 4200# with consistent 1.90's for 60 ft.

F bodies vs A bodies. I told you those Polyglas would grip!!!!

[RAIIIT/A]

They do grip better. I notice I have to put the pedal down a little harder now to do a donut...

http://i173.photobucket.com/albums/w65/764spdta/IMG7141-M.jpg