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315/60/15 drag radials with 354 gear? #1209511
04/03/12 10:46 PM
04/03/12 10:46 PM
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San Francisco Ca
SCATPK Offline OP
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Looking to replace my m/t 325/50/15 drags radials with possibly 315/60/15 drag radials and wondering if I will have any clearance issues under my 68 b-body and how such a tall tire will effect my track time with a 354 rear gear? My best time with the 325`s is 11.82@119mph any ideas on what the taller tire will do?

And also thinking about a set of hoosier drag radials and looking for some feedback on them vs the m/t`s. I do use them for street driving so some consideration for that must be taken in as the m/t`s have gone about 2500+ miles.

Any input would be appreciated.

Re: 315/60/15 drag radials with 354 gear? [Re: SCATPK] #1209512
04/03/12 11:00 PM
04/03/12 11:00 PM
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Bend,OR USA
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I ran 3:73,3:91 and 4:10 gears in my car with 315x60x15 and saw no measurable differences in ET or MPH The circumference of the shorter tire (28 inch) compared to the taller tire (30 inches) is comparable to switching the gears from 3:91 to 3:73, not exactly the same percentage of change but close Where do you shift the car into high gear now at the track, before the 1/8 or further down the track the taller tire will hook better than the shorter tire, especailly on bad ones


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 315/60/15 drag radials with 354 gear? [Re: Cab_Burge] #1209513
04/03/12 11:06 PM
04/03/12 11:06 PM
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San Francisco Ca
SCATPK Offline OP
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I am shifting the car into 4th a little more than 3/4`s down the track. Not to worried about the et but sounds like the taller tire will help with traction on the line, good to hear! Anyone have anything to say about the hoosiers vs the e/t`s? Plus the taller tire should make the drive on the highway a little nicer as it should reduce the rpms a bit cruizing at 65-70mph.

Re: 315/60/15 drag radials with 354 gear? [Re: SCATPK] #1209514
04/04/12 11:30 AM
04/04/12 11:30 AM
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Marion, South Carolina [><]
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The 295-65 will fit better and is 30" tall. I think the 315-60 will be a VERY tight fit.
The M/T will last a lot longer than the Hoosier, so I am told.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: 315/60/15 drag radials with 354 gear? [Re: an8sec70cuda] #1209515
04/04/12 02:47 PM
04/04/12 02:47 PM
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San Francisco Ca
SCATPK Offline OP
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Chip, thanks for the feedback!

Re: 315/60/15 drag radials with 354 gear? [Re: SCATPK] #1209516
04/04/12 03:22 PM
04/04/12 03:22 PM
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Bend,OR USA
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I wouldn't run a radial in a stick shift car at the drag strip, my expereince is that once the M/T ET Street Radials break loose they don't recover, at least on my car they don't, I have to peddle it or shift it I have not tried those tires on a stick shift car so I'm not saying that based off of actual expereinces with them on a stick shift car Have you used them on your car yet? I would buy a set of stick shift 9x30 slicks and have them mounted on another set of rims for track use only I have both the M/T ET Streets and M/T ET Street Radials mounted for my car, I use the radials at the good tracks and the bias plys on the street or at marginal or bad tracks, like Friday night test and tune races


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 315/60/15 drag radials with 354 gear? [Re: SCATPK] #1209517
04/04/12 03:40 PM
04/04/12 03:40 PM
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Marion, South Carolina [><]
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No prob. I doubt you'll be able to fit the 315-60 unless you have minitubs and/or inboard spring kit.
The 295-65 is a 30x10 tire and is what I run on my cuda.
Hoosiers are a softer compound and wear much faster than the M/T. I've never had a pair of them myself, but did a lot of asking around about them recently. The Hoosier is more race only, the M/T more street/strip.
Just put on a new pair of M/T's on Monday.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: 315/60/15 drag radials with 354 gear? [Re: an8sec70cuda] #1209518
04/05/12 12:57 PM
04/05/12 12:57 PM
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Motor City
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6PKRTSE Offline
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Quote:

No prob. I doubt you'll be able to fit the 315-60 unless you have minitubs and/or inboard spring kit.
The 295-65 is a 30x10 tire and is what I run on my cuda.
Hoosiers are a softer compound and wear much faster than the M/T. I've never had a pair of them myself, but did a lot of asking around about them recently. The Hoosier is more race only, the M/T more street/strip.
Just put on a new pair of M/T's on Monday.




Chip is correct,
I have mini tubs & relocated the springs on my 70 Challenger to fit 315's.

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1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
Re: 315/60/15 drag radials with 354 gear? [Re: 6PKRTSE] #1209519
04/05/12 09:39 PM
04/05/12 09:39 PM
Joined: Jan 2003
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San Francisco Ca
SCATPK Offline OP
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Quote:

Quote:

No prob. I doubt you'll be able to fit the 315-60 unless you have minitubs and/or inboard spring kit.
The 295-65 is a 30x10 tire and is what I run on my cuda.
Hoosiers are a softer compound and wear much faster than the M/T. I've never had a pair of them myself, but did a lot of asking around about them recently. The Hoosier is more race only, the M/T more street/strip.
Just put on a new pair of M/T's on Monday.




Chip is correct,
I have mini tubs & relocated the springs on my 70 Challenger to fit 315's.




After thinking about it the 315/60 tires will not fit without some extra work. The 295-65 seem like the ticket for a sticky street tire and the extra height will help with all the highway driving I do. Plus it seem to be the taller tire will help a bit getting it down the track when I get it out to play.

Re: 315/60/15 drag radials with 354 gear? [Re: SCATPK] #1209520
04/05/12 09:50 PM
04/05/12 09:50 PM
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Bend,OR USA
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Cab_Burge Offline
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Quote:

Quote:

Quote:

No prob. I doubt you'll be able to fit the 315-60 unless you have minitubs and/or inboard spring kit.
The 295-65 is a 30x10 tire and is what I run on my cuda.
Hoosiers are a softer compound and wear much faster than the M/T. I've never had a pair of them myself, but did a lot of asking around about them recently. The Hoosier is more race only, the M/T more street/strip.
Just put on a new pair of M/T's on Monday.




Chip is correct,
I have mini tubs & relocated the springs on my 70 Challenger to fit 315's.




After thinking about it the 315/60 tires will not fit without some extra work. The 295-65 seem like the ticket for a sticky street tire and the extra height will help with all the highway driving I do. Plus it seem to be the taller tire will help a bit getting it down the track when I get it out to play.


E bodys and B bodys are not the same on many things, especailly tire clearances Trust me on that I have owned and raced both. Measure your section width inside your wheel wells(both sides )and subtract 1/2 inch per side and go from there on which tire size to use I have ran both sizes(315x60x15 and 295x65x15) on my Duster, I have a used set of the MT ET Street Radials 295x65x15 that are almost worn out that I could bring to MATS if that would help you see how they fit Let me know if you have any way of getting them to you from thier


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 315/60/15 drag radials with 354 gear? [Re: Cab_Burge] #1209521
04/05/12 10:09 PM
04/05/12 10:09 PM
Joined: Feb 2004
Posts: 2,495
Richmond , Virginia
BEEQUIK Offline
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Richmond , Virginia
Largest tire that will fit on a stock wheel well B-Body is the 295/6515.The 315/60 will rub the wheel well .It is 1 inch wider than the 295/65. My buddy has 295/65's on his 68 GTX and they fit nicely . On a mini-tubbed 69 dodge B-Body I was able to run a 29x14.50 hoosier QTP,so if you really need more tire you can really cram one in there with a little of this...

Last edited by BEEQUIK; 04/05/12 10:10 PM.
Re: 315/60/15 drag radials with 354 gear? [Re: BEEQUIK] #1209522
04/06/12 12:23 AM
04/06/12 12:23 AM
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Posts: 1,472
Overland Park, KS.
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Joshs68 Offline
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Overland Park, KS.
I tried a 315 on my charger. I had to space the spring hangers back for clearance as the tires rubbed the front of the wheel well moulding.







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