Front Tire Size

chevy 68 · 08-01-2011, 11:19 AM

I have a 26" front tire and I consistently cut .040 lights. What size tire would I need to cut .015 to .020 lights? 24" tires?

Daran Summerton · 08-01-2011, 01:16 PM

More Air!

Eric Merryfield · 08-01-2011, 02:53 PM

Quote:

Originally Posted by chevy 68

I have a 26" front tire and I consistently cut .040 lights. What size tire would I need to cut .015 to .020 lights? 24" tires?

You might have to take a bump or two.......might want to try some more rear tire pressure too to speed up the cars reaction time a bit, of course a bit higher launch RPM, will not hurt along with higher front air pressure...

Eric

Myron Piatek · 08-01-2011, 03:25 PM

I went from 26" to 28" to slow my RT down a bit, but it was several years ago. I'm pretty sure it was at least .10, but don't recall the exact #. You can still add air to fine-tune it for quicker RT's. But the size change will make more difference than front tire air pressure adjustments within safe/resonable limits.

Check front and rear suspension bushings for wear also. New ones will firm things up.

6-8 point roll bar and/or frame connectors already in? That should also help.

cad · 08-02-2011, 12:10 PM

^^Agree. Leave it and add 6-8 pounds of air...or launch at a higher RPM.

Clark

Tim Ellis · 08-02-2011, 08:27 PM

In my opinion 6-8 lbs of air won't even be .01 improvement

cad · 08-03-2011, 01:19 PM

I footbrake with no 2 step (currently). It doesnt mention what launch control setup... 6-8 pounds and changing RPM will affect mine enough...

Michael Beard · 08-04-2011, 11:00 AM

2" diameter change in front tires can be .010-.015.

Quote:

Originally Posted by Tim Ellis

In my opinion 6-8 lbs of air won't even be .01 improvement

This depends on what the change in air pressure is, "from what, to what". 40 to 46psi? No, you're not going to see anything. 30 to 36? Yes, definite change.

I wrote an extensive (10+pg) editorial on www.thisisbracketracing.com covering bottom bulb reaction times and how to adjust them. It is a subscription site, but worth every penny and then some.

greg fulk · 08-05-2011, 03:08 AM

I have seen Dad as low as 18lbs on the 26"! I bought him a set of 28" old school Moroso he runs some where around 30 now.

08-01-2011, 11:19 AM	#1
chevy 68 Junior Member Join Date: Aug 2009 Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Front Tire Size I have a 26" front tire and I consistently cut .040 lights. What size tire would I need to cut .015 to .020 lights? 24" tires?

08-01-2011, 01:16 PM	#2
Daran Summerton Senior Member Join Date: Jun 2003 Location: Las Vegas nv Posts: 600 Likes: 18 Liked 66 Times in 37 Posts	Re: Front Tire Size More Air! __________________ 72 cutlass

08-01-2011, 03:25 PM	#4
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Front Tire Size I went from 26" to 28" to slow my RT down a bit, but it was several years ago. I'm pretty sure it was at least .10, but don't recall the exact #. You can still add air to fine-tune it for quicker RT's. But the size change will make more difference than front tire air pressure adjustments within safe/resonable limits. Check front and rear suspension bushings for wear also. New ones will firm things up. 6-8 point roll bar and/or frame connectors already in? That should also help.

08-02-2011, 12:10 PM	#5
cad Senior Member Join Date: Apr 2009 Location: Omaha, NE Posts: 702 Likes: 202 Liked 91 Times in 51 Posts	Re: Front Tire Size ^^Agree. Leave it and add 6-8 pounds of air...or launch at a higher RPM. Clark

08-02-2011, 08:27 PM	#6
Tim Ellis Member Join Date: Dec 2004 Location: Beavercreek Or. Posts: 272 Likes: 31 Liked 7 Times in 6 Posts	Re: Front Tire Size In my opinion 6-8 lbs of air won't even be .01 improvement

08-03-2011, 01:19 PM	#7
cad Senior Member Join Date: Apr 2009 Location: Omaha, NE Posts: 702 Likes: 202 Liked 91 Times in 51 Posts	Re: Front Tire Size I footbrake with no 2 step (currently). It doesnt mention what launch control setup... 6-8 pounds and changing RPM will affect mine enough...

08-05-2011, 03:08 AM	#9
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Front Tire Size I have seen Dad as low as 18lbs on the 26"! I bought him a set of 28" old school Moroso he runs some where around 30 now. __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"