Launch RPM and Tire Pressuret

GaryGoFast · 08-31-2010, 08:41 AM

This is a question for S/G racers. Do you feel that a door car will hit the tree better with higher launch rpm and less air in tire, say 6000 leave with 7.5 psi vs a 4000 rpm leave with 9 psi. The school of thought on lower rpm is that the car will dead hook and pop the front out of the beams. I have been attemtping to get the cart to go red on a .370 and after yrs of no problems with the .5 tree I am experiencing some growing pains trying to hit the .370.
Among other issues that affect launch, I am zeroing in on tire pressure and rpm.

CBS jr · 08-31-2010, 10:47 AM

Gary... take the 28 inch tall tires off the front first. LOL Your kids must be done with baseball. Talk soon

GaryGoFast · 08-31-2010, 11:27 AM

Baseball is over, he starts college ball next week, I am ready to resume the insanity. 24s on the front.

chester · 09-12-2010, 02:26 PM

gary, my car weighs 2200 with me and i leave at 6100rpm and run 6 psi, if i don't screw up i need 30 in the delay bow, check your front tire pressure and frontend travel also you will need fresh rear tire, hope this helps, chuck rothermel

08-31-2010, 08:41 AM	#1
GaryGoFast Senior Member Join Date: Nov 2003 Location: New York Posts: 804 Likes: 0 Liked 1 Time in 1 Post	Launch RPM and Tire Pressuret This is a question for S/G racers. Do you feel that a door car will hit the tree better with higher launch rpm and less air in tire, say 6000 leave with 7.5 psi vs a 4000 rpm leave with 9 psi. The school of thought on lower rpm is that the car will dead hook and pop the front out of the beams. I have been attemtping to get the cart to go red on a .370 and after yrs of no problems with the .5 tree I am experiencing some growing pains trying to hit the .370. Among other issues that affect launch, I am zeroing in on tire pressure and rpm. __________________ Gary Federico S/St, S/G 1814

08-31-2010, 10:47 AM	#2
CBS jr Member Join Date: Jan 2005 Location: who cares Posts: 176 Likes: 0 Liked 0 Times in 0 Posts	Re: Launch RPM and Tire Pressuret Gary... take the 28 inch tall tires off the front first. LOL Your kids must be done with baseball. Talk soon

08-31-2010, 11:27 AM	#3
GaryGoFast Senior Member Join Date: Nov 2003 Location: New York Posts: 804 Likes: 0 Liked 1 Time in 1 Post	Re: Launch RPM and Tire Pressuret Baseball is over, he starts college ball next week, I am ready to resume the insanity. 24s on the front. __________________ Gary Federico S/St, S/G 1814

09-12-2010, 02:26 PM	#4
chester Junior Member Join Date: Jan 2007 Location: kinderhok,n.y. Posts: 43 Likes: 0 Liked 1 Time in 1 Post	Re: Launch RPM and Tire Pressuret gary, my car weighs 2200 with me and i leave at 6100rpm and run 6 psi, if i don't screw up i need 30 in the delay bow, check your front tire pressure and frontend travel also you will need fresh rear tire, hope this helps, chuck rothermel