How low can MT DR tire pressure be set at track?
- Thread starter Drewster
- Start date
turb0buick57
Member
- Joined
- Oct 10, 2009
Depends on how good the track prep is and suspension mods. Passenger side air bag at 20 ...driver side at 8-10..and I've been able to get away with 16.5-17 in the drag radials
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I normally run 17#. I’ve run as low as 14#. If possible have someone take a slow motion video. You don’t want to run over the tire. Does the car usually hook good? Check things over really well. How are others doing with traction on the particular day?
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SpeedRacerX
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- Jan 20, 2014
I assume you heated them well with a significant burnout?
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SpeedRacerX
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- Jan 20, 2014
What did you have the bags set on? I have a similar rear suspension setup and too much air will make the car basketball bounce after the first squat. One of the best things you do in this situation is to have someone video your launch. You can learn a lot.
I had my best launch relying on the HR bar and little to no air in the bags. 1.63 60-foot leaving at about 12-15# with the e-brake method. I don't have line lock.
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- May 28, 2001
Air bags... Not a good substitute for a quality adjustable shock. {At both ends of the car.}
- Joined
- Nov 30, 2009
With that HR bar you don't need the air bags , unless you need them to keep the tires from rubbing .
Like Chuck said , shocks help a lot . Adjustable fronts can be set to let the front end rise faster for better weight transfer to plant the rears .
I usually run 15 lbs , but have gone lower to 13 lbs on a poorly prepped track .
Like Chuck said , shocks help a lot . Adjustable fronts can be set to let the front end rise faster for better weight transfer to plant the rears .
I usually run 15 lbs , but have gone lower to 13 lbs on a poorly prepped track .
Jerryl
Tall Unvaccinated Chinese Guy
- Joined
- Dec 14, 2004
Hey Drewster.
If you haven't yet done so, spend some time reading about Instant Center by Kevin Slaby. My eyes were opened years ago on this subject.
Take care!
If you haven't yet done so, spend some time reading about Instant Center by Kevin Slaby. My eyes were opened years ago on this subject.
Take care!
drop the tire pressure down to 10psi and evaluate from there,preload the airbag,25psi in the RT,10psi in the LT.generally speaking the radials will go faster with more psi provided it takes the hit,however on hard hitting combos the radial can be shocked into wheelspin needing the lower pressure to allow the sidewall to work better.it can be overcome with contact patch and power mgmt but the 275/60 is light on contact patch and has the stiffer sidewall.the pro is a much better choice due to the sidewall being softer so its less resistant to wheelspin from initial shock
my experience with low tire pressure using a drag radial , was embarrassing, as I was able to read the ads on the walls of the drag strip, I read an article from m/t stating low air pressures do not work with DR's as the tire was not designed for it, I'd work on chassis set up ,and shock set up .
when you do a burn out, look at the tire pattern on the ground, and adj tire pressure from that.
when you do a burn out, look at the tire pattern on the ground, and adj tire pressure from that.
We run high teens/really low 20s. Only come out with 3#s of boost.Similar threads
