PDA

View Full Version : A40s


18 mod
08-30-2016, 09:57 PM
Anyone else having problems with the 2nd tread in from the outside chunking out. It is only that row. After a 8 lap heat the tread raises and is spongy like the rubber is blistering at the base of the tire. By the end of a feature it has nearly the whole 2nd row chunked out. We are starting with 13-14psi and siping less than 1/8" deep. Seems that its worse when there is moisture in the track. Any thoughts/advice would be appreciated cause this is getting expensive.
erm11
08-30-2016, 10:08 PM
Quit siping
George
08-30-2016, 10:53 PM
yep ,don't sipe, especially on fast tracks.. but you don't need to sipe A40S...maybe after 4 or 5 nights on a right rear
thinkstomuch
08-31-2016, 06:35 AM
not having these issues. agreed - i'd stop siping
RCJ
08-31-2016, 07:15 AM
Raise the air pressure a couple lbs.
jhill22
08-31-2016, 11:58 AM
Don't sipe
JustAddDirt
08-31-2016, 03:16 PM
I only sipe them if they harden up a bit, or I have moved them to the front of car.
I would NEVER run one on the RR.
if it run them on the LR new, I never sipe them.
powerslide
08-31-2016, 07:38 PM
what do one of these punch new?
JustAddDirt
09-01-2016, 07:54 AM
I have seen 40-50 new .
kind of a wide range.
langdonracing48
11-07-2016, 03:20 AM
Like everyone said, quit siping. It tears the a40s apart. Its also trash on the right rear anyway. Bolt on an H.
JustAddDirt
11-07-2016, 11:29 AM
Like everyone said, quit siping. It tears the a40s apart. Its also trash on the right rear anyway. Bolt on an H.


exactly.
The feel really mushy on the RR to me. car is real squirmy. I have only tried them on a slower track on RR and do not like feeling.
I Really like the H on the RR at all times. just have to know how to get them to fire quick.
powerslide
11-15-2016, 11:07 AM
exactly.
The feel really mushy on the RR to me. car is real squirmy. I have only tried them on a slower track on RR and do not like feeling.
I Really like the H on the RR at all times. just have to know how to get them to fire quick.

Even for 2 laps at the gateway nationals?
JustAddDirt
11-15-2016, 12:20 PM
Even for 2 laps at the gateway nationals?

maybe an exception there, especially early in night. I don't think that track will be really fast. but if it gets hard and slick, I would put on an H without a doubt
Fox_hunter42
11-24-2016, 04:19 PM
Hoosier told me to only sipe a new tire, less than 1/32 deep and only one time. helps the rubber to cure and harden. heat soak tire before racing it.