28in tall tire - 2003-04 Mach 1 Registry Owners Club

97tbird · 03-21-2013, 06:28 PM

Anyone here run a 28in tall d/r?
Thinking about picking up a set but I have the stock gearing and the car just has exhaust.

What mods do you guys have?

SBF · 03-21-2013, 09:06 PM

FWIW, Drag radials do not mix well with stick cars.(At least not for maximum 1/4 mile performance) Others will chime in I'm sure and support and argue this both ways. With stock gears, stick with a 26" tire. Unless you have 4.56 or lower gears, 28's are overkill. I think some guys on here have used them with 4.88's. Several older and much more experienced drag racers have told me not to run any more tire than your car needs. Hope this helps.

LM_Coogs · 03-21-2013, 09:30 PM

+1 ^^^^^

I have 28in slicks and a 4.56 gear in my car now but its still not enough gear for the tires so the car will run as good as it should. I will be installing a 5.13 gear to make up for the tire height.

lcaptmorg · 03-22-2013, 12:50 AM

28" are over kill for a stock gear car. I run 28" mt et drs on the street (1.72 60ft) 28" (1.54) slicks at the track and have done so with 4:56s and my current 4:88s. They are great with a lot of gear but will only slow you down with less gear. I effectively lowers your final ratio.

Stick with 26s

5:13s Holy hell. I thought the 4.88s were overkill. I was only trapping at 6100-6200 with the 4:56. What rpm are you getting with your current set up through the traps.?

97tbird · 03-22-2013, 02:06 AM

Thanks guys. I was under the impression that the 28 would be way too much. Just wanted some other opinions

LM_Coogs · 03-22-2013, 03:01 AM

Quote:

Originally Posted by lcaptmorg

5:13s Holy hell. I thought the 4.88s were overkill. I was only trapping at 6100-6200 with the 4:56. What rpm are you getting with your current set up through the traps.?

6800-7200 need it to be at 7500 or more cause my shift points is 7500. With my current setup it makes high rpms power needed something to get it in the powerband quicker off the hit.

Mach828 · 03-22-2013, 11:57 AM

Ya 28" is way too much tire for a stock geared NA car. I ran a 28x10.5x15 slick for a while. It barely cleared with stock springs. And once I switched to a 26x8.5x15 I dropped a tenth in my 60'. 1.7s with the 28" tire and 1.6s with the 26" tire.

MachRan · 04-17-2013, 08:00 AM

I prefer 28 as long as you have the gear. The extra sidewall helps.

03-21-2013, 06:28 PM	#1
97tbird Registered User Join Date: Apr 2012 Location: Plainfield, IL Posts: 140	28in tall tire Anyone here run a 28in tall d/r? Thinking about picking up a set but I have the stock gearing and the car just has exhaust. What mods do you guys have? __________________ 2003 MACH 1 1997 Thunderbird LX

03-21-2013, 09:06 PM	#2
SBF Registered User Join Date: Dec 2006 Location: kansas city Posts: 61	Re: 28in tall tire FWIW, Drag radials do not mix well with stick cars.(At least not for maximum 1/4 mile performance) Others will chime in I'm sure and support and argue this both ways. With stock gears, stick with a 26" tire. Unless you have 4.56 or lower gears, 28's are overkill. I think some guys on here have used them with 4.88's. Several older and much more experienced drag racers have told me not to run any more tire than your car needs. Hope this helps.

03-21-2013, 09:30 PM	#3
LM_Coogs Black Guy With Mach 1 Join Date: Apr 2004 Location: La Marque, TX Posts: 979	Re: 28in tall tire +1 ^^^^^ I have 28in slicks and a 4.56 gear in my car now but its still not enough gear for the tires so the car will run as good as it should. I will be installing a 5.13 gear to make up for the tire height. __________________ CHRIS Josey's Racing Team In Loving Memory of My Dad BURTIS JOSEY 2-2-43/3-29-16

03-22-2013, 12:50 AM	#4
lcaptmorg Registered User Join Date: Jun 2007 Location: Las Vegas Posts: 1,086	Re: 28in tall tire 28" are over kill for a stock gear car. I run 28" mt et drs on the street (1.72 60ft) 28" (1.54) slicks at the track and have done so with 4:56s and my current 4:88s. They are great with a lot of gear but will only slow you down with less gear. I effectively lowers your final ratio. Stick with 26s 5:13s Holy hell. I thought the 4.88s were overkill. I was only trapping at 6100-6200 with the 4:56. What rpm are you getting with your current set up through the traps.? __________________ 03 We call her Hooker. Stock Long Block 301/310 12.08@110 1.58 60ft 4400da Cams and intake 365/338 SAE 11.73@115 1.54 60ft @3400 ft DA 13.6:1 Cornfed NA 5.0 497/421 SAE 10.66@128 1.42 60ft 3000ft DA

03-22-2013, 02:06 AM	#5
97tbird Registered User Join Date: Apr 2012 Location: Plainfield, IL Posts: 140	Re: 28in tall tire Thanks guys. I was under the impression that the 28 would be way too much. Just wanted some other opinions __________________ 2003 MACH 1 1997 Thunderbird LX

03-22-2013, 11:57 AM	#7
Mach828 Dark Knight Join Date: Nov 2009 Location: Albuquerque, NM Posts: 5,759	Re: 28in tall tire Ya 28" is way too much tire for a stock geared NA car. I ran a 28x10.5x15 slick for a while. It barely cleared with stock springs. And once I switched to a 26x8.5x15 I dropped a tenth in my 60'. 1.7s with the 28" tire and 1.6s with the 26" tire. __________________ Vortech V2 S-trim, E85, A2A Treadstone, Comp cams, built engine, full exhaust, built rear, built 4r70, more mods. Tuned by me with SCT Advantage

04-17-2013, 08:00 AM	#8
MachRan Registered? Join Date: Oct 2003 Location: Havre de Grace, MD Posts: 1,071	Re: 28in tall tire I prefer 28 as long as you have the gear. The extra sidewall helps. __________________ 87 Turbo T Limited 10k org miles 87 Turbo T light chestnut (sold) 86 SVO 7B (sold) 95 Cobra 347 (SOLD) 03 Azure blue 5 spd (SOLD) 93 Calypso coupe (SOLD) 90 LX Vert (SOLD) 86 GT (SOLD)

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