Moparts

60ft times vs tire height

Posted By: hp340nos

60ft times vs tire height - 01/23/11 01:03 AM

i was wondering if my 60fts would improve with a shorter tire height,88 dakota 3340# 418cid, 9.7 compression, pump gas small block stroker,about 470 hp,driven to the track, 727 reverse pattern lba tranny.ptc 10" converter, flashes 4200, 8 3/4 3.91 posi,stock front /rear shcks with cal/trac bars, m/t drag radial 295/65-15.1st time at track with new motor it ran 7.31@94.5 with a 1.64 60ft.im thinking about going to a m/t drag radial 275/60-15 or a 325-50-15 which are 28"tall instead of 30 like the current 295-65-15?i was thinking the tall tire was hurting my off the line gearing?

Attached picture 6432863-001.JPG
Posted By: Anonymous

Re: 60ft times vs tire height - 01/23/11 02:24 AM

Yes, shorter tire will definitely help your 60 foot.I tried to go as small up front as possible without the car looking ridiculous.
Posted By: MR_P_BODY

Re: 60ft times vs tire height - 01/23/11 02:50 AM

Granted those are tall tires for your gear but better
shocks would also help you
Posted By: Quicktree

Re: 60ft times vs tire height - 01/23/11 03:18 AM

Quote:

Granted those are tall tires for your gear but better
shocks would also help you



the shorter tire also reduces contact patch and may cause traction issues if the car is not set up well. so it could actually slow you down if you can't hook.
Posted By: hp340nos

Re: 60ft times vs tire height - 01/23/11 03:36 AM

yes thats what i figured adjustable front/rear shocks would help weight transfer also.
Posted By: barracuda man

Re: 60ft times vs tire height - 01/23/11 03:36 AM

maybe try some 4.56 or 488 gears.should net a 1.55 60'times.
Posted By: MR_P_BODY

Re: 60ft times vs tire height - 01/23/11 06:28 AM

Also think of it this way... its cheaper to change
a gear than it is to buy a set of tires.... tires
about $450 and a gear and set up is $320 or less
Posted By: hp340nos

Re: 60ft times vs tire height - 01/23/11 07:01 AM

the tires are at the wear bars m/t drag radials,thats why i was asking about shorter tires.thanks mike
Posted By: TheBlackCar

Re: 60ft times vs tire height - 01/23/11 08:14 AM

You can change the drive ratio either way, which should help. Leaving a taller tire on it and changing the gear would give a bigger footprint and would be the preferred method. As mentioned, you can do it with shorter tires, but it may take some additional time in chassis tuning.

Good Luck
Posted By: hp340nos

Re: 60ft times vs tire height - 01/23/11 05:53 PM

the truck is street driven to the track.4.56/4.88 seem a little low for the street to me.i know i cant have best of both worlds street/strip,just trying to improve 60 fts some is all.
Posted By: 68LAR

Re: 60ft times vs tire height - 01/23/11 06:19 PM

I run 4.56's with a 30" tall tire. Street driven most of the time, 1.60 60' times with a 3900# car. At 60 MPH I'm taching 3100 rpm.
Posted By: Dartman928

Re: 60ft times vs tire height - 01/23/11 06:57 PM

I have a 28" tall tire and have a 1.35-1.36 60 ft

I would suggest look at shocks and other chassis adjustments
Posted By: 383man

Re: 60ft times vs tire height - 01/24/11 08:38 AM

I run 4.30's with a 30" tall tire myself in my 63 with a mild 440. It goes 3700 lbs with me in it and my best 60 is a 1.57 with my average in the low 1.60's on tracks with not so great hook. It works good for my street driving as with my 9.5 Dynamic converter it tachs about 3100 at 60 mph. I drive it on the highway all the time as I drive it the 45 miles to the track also. More gear might help your 60 but I would think suspension help should work also as you are much lighter then my 63 and should 60 ft as good or better then I do. My 63 is about 500 flywheel hp and has a best 1/8 of 7.28 @ 93.74 mph and a best 1/4 of 11.49 @ 116. And my converter flashes about 4200 and works real nice. Good luck , Ron
Posted By: dOrk !

Re: 60ft times vs tire height - 01/24/11 09:32 AM

Quote:

i was wondering if my 60fts would improve with a shorter tire height,88 dakota 3340# 418cid, 9.7 compression, pump gas small block stroker,about 470 hp,driven to the track, 727 reverse pattern lba tranny.ptc 10" converter, flashes 4200, 8 3/4 3.91 posi,stock front /rear shcks with cal/trac bars, m/t drag radial 295/65-15.1st time at track with new motor it ran [Email]7.31@94.5[/Email] with a 1.64 60ft.im thinking about going to a m/t drag radial 275/60-15 or a 325-50-15 which are 28"tall instead of 30 like the current 295-65-15?i was thinking the tall tire was hurting my off the line gearing?




I think your combo would be helped with a shorter tire BECAUSE the combo should have a taller gear in it.

BUT ... if the car is geared correctly .... I don't see how a shorter tire would help 60 foot times. Now reaction times ... that is another story.
Posted By: StripeHOG

Re: 60ft times vs tire height - 01/24/11 10:07 AM

it would also look better w/ shorter rear tires IMO
© 2024 Moparts Forums