« previous next »
Pages: [1]   Go Down

Author Topic: Tire growth  (Read 3402 times)

Offline masracingtd1167

  • Hero Member
  • *****
  • Posts: 1110
  • bill masiello Shelton Ct.
    • View Profile
  • Your Best Time: 7.40's at 181 on motor 6.94 at 192 nitrous
  • Your Engine: 394 chevy
  • Your Track: Lebanon Valley Dragway
  • Your Vehicle: 2003 Neil and Parks
Tire growth
« on: March 27, 2022, 08:50:55 AM »
Question for Jon ! I am using Th M+ H 12X33 Tire and trying to figure out how much they grow at 185 mph . The tire measures 100 inches at 5 lbs air ! Trying to figure out what gear to put in . I am thinking a 5.00 or a 4.86 ! Not really afraid of rpm this new combination is a 15 degree head rolled over to 11 degrees  and flow much better than my old 18 degree heads  ! Thanks bill !
Logged

Offline gregm784

  • Sr. Member
  • ****
  • Posts: 384
    • View Profile
    • Means Racing
  • Your Engine: 365" GenIV SBC
  • Your Track: Famoso Raceway
  • Your Vehicle: 1997 Stirling 200" FED
Re: Tire growth
« Reply #1 on: March 31, 2022, 04:19:11 PM »
On my combo, i am running a 4.10 gear, the M&H 12.00x16 tire that measures 100.625 at 8psi.  I run 179mph and 8050rpm on my data logger.
Logged
Greg
El Dorado County, CA
www.meansracing.com

Offline masracingtd1167

  • Hero Member
  • *****
  • Posts: 1110
  • bill masiello Shelton Ct.
    • View Profile
  • Your Best Time: 7.40's at 181 on motor 6.94 at 192 nitrous
  • Your Engine: 394 chevy
  • Your Track: Lebanon Valley Dragway
  • Your Vehicle: 2003 Neil and Parks
Re: Tire growth
« Reply #2 on: April 01, 2022, 03:37:17 PM »
Greg do you think it's reasonable to think they would grow to 103 inches at speed ?
Logged

Offline Rat

  • Jr. Member
  • **
  • Posts: 65
    • View Profile
  • Your Best Time: 8.585 @ 154.55
  • Your Engine: Stack Injected All Iron 392 Chrysler Hemi
  • Your Track: Willowbank Raceway, Queensland, Australia
  • Your Vehicle: Colthup Bros FED
  • General Location: Australia - East Coast
Re: Tire growth
« Reply #3 on: April 02, 2022, 07:17:14 AM »
We had an issue where the numbers didn't add up RPM v MPH, when we we reverse calculated the tire size, they were an inch & half taller than what he tire was marked. We recalculated the gear ratio using the larger diameter, replaced the gear set with the new ratio and the MPH & RPM dead on.
Gregm784, According to the Wallace calculators your tyres are growing to 101.096" or 32.18" dia @ 179 mph
Logged

Offline JEFF/21C

  • Full Member
  • ***
  • Posts: 122
    • View Profile
  • Your Best Time: N/A
  • Your Engine: 306 SBC INJECTED ALKY
  • Your Track: NONE
  • Your Vehicle: 23 T ALTERED
  • General Location: eastern canada
Re: Tire growth
« Reply #4 on: April 04, 2022, 04:28:35 PM »
How much changing rim width change tire height?
Logged
Pages: [1]   Go Up
« previous next »