295/60-15 Drag Radials - TCCoA Forums
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post #1 of 12 (permalink) Old 08-02-2017, 02:05 PM Thread Starter
50 years of Mercury Cougar 1967/2017
 
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295/60-15 Drag Radials

Has anyone installed 295/60-15 radials or 29 or 30 slicks on their MN12?

If yes, any modifications to the fender well needed.

Rick

Quickest N/A Modular MN12.
1995 XR7-11.77 @ 113.29 (3537 lbs.)
01/31/18 PBIR
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post #2 of 12 (permalink) Old 08-03-2017, 02:42 PM
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You're going from the stock 26.7" tire height to a 28.9" tire height. I would imagine that you would need to make sure that it doesn't rub at it's height but the width should be OK if you've got the right offset wheel. Speaking of the right offset wheel, you're less likely to rub the fender if the wheel and tire are tucked behind the fender lip. That's where the offset will make the biggest difference. I'm going to guess that you would want a 45mm offset if you're going with 10" wide wheels.

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
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post #3 of 12 (permalink) Old 08-03-2017, 06:07 PM
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I ran both the 295 drag radial and a 10.0X29 Hoosier with the IRS in the past. Both on 15X8 Weld Prostars. Both cleared, but would rub on the front of the wheel well under hard acceleration. The rubbing was caused by the lower control arms flexing in the stock bushings that attach to the subframe. New Delrin bushings in the arms and the knuckles fixed that.

Mike....
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post #4 of 12 (permalink) Old 08-03-2017, 09:34 PM
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Rick, Unless you are planning to run a power adder on the car you are really going to more tire on the car than it can use. The tire height increase may pick up a MPH or two at the track but likely at the expense of ET's.

Just my thoughts.

Steve
1996 Cougar XR7 Special Edition (Street & Strip)
"There's a bad, built NA 4.6L COMING Spring-Summer 2018"

Elite member of the Halfshaft snapping, Auburn eating, Tranny crunching, Piston Melting, Tire lifting, 500+ lb ft Torque Club.

Cougar ET-Stock 4.6 shortblock/Stock PI headswap Bullitt NA 12.94 @ 105+
Nitrous 11.75 @ 114 MPH

2008 Ford Powerstroke 6.4 TT F250 4X4 Supercrew: 12.82 @ 105 MPH

"IN MEMORY OF MY FRIENDS JOEL BENDER 1979-2006", JOHNNY LANGTON 1975-2011, and MICHAEL VIVERETTE 1953-2013"
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post #5 of 12 (permalink) Old 08-04-2017, 07:53 AM Thread Starter
50 years of Mercury Cougar 1967/2017
 
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I might be going with 4:88's.

Its time for a new set of drag radials.

Mike, which rear shocks were you running?

Right now my rear shocks are the original, 1995 Mercury Cougar.
They really squat on the launch.
Plus my reaction times are .000.

When I pay attention to the Christmas tree.

Quickest N/A Modular MN12.
1995 XR7-11.77 @ 113.29 (3537 lbs.)
01/31/18 PBIR
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post #6 of 12 (permalink) Old 08-04-2017, 09:02 AM
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Quote:
Originally Posted by r429460 View Post
I might be going with 4:88's.

Its time for a new set of drag radials.

Mike, which rear shocks were you running?

Right now my rear shocks are the original, 1995 Mercury Cougar.
They really squat on the launch.
Plus my reaction times are .000.

When I pay attention to the Christmas tree.
Recently I believe you mentioned getting rid of the sway bars. Since I think you're still IRS, have you researched actually using a very big rear sway bar to make your car behave like a solid rear axle?

"When the only tool you have is a hammer, suddenly everything looks like a nail."
"Nothing is foolproof because fools are so ingenious."
1992 Ford Thunderbird SC

Coast High Peformance 347 Stroker
-Low Tension Oil Rings, Zero Gap Seconds
-10.5:1 Compression Ratio
Trick Flow Twisted Wedge heads
Trick Flow Stage 1 cam
Trick Flow Street Heat Intake
Mac 1 5/8 long tube headers
FRPP 42# injectors
3.27 gears
Custom aluminum driveshaft
M5R2
Burned Chip for SN95 T4M0 ECM
OMGHI2U

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post #7 of 12 (permalink) Old 08-04-2017, 09:21 AM
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Is the 11.97 @ 109.35 running out of gear on the top end, or were you on the brakes?

Al

97 T-Bird LX 4.6 - 80k miles
94 Supra TT Auto - street/strip car
04 CVPI- Brenda's car - 76k miles
Previous Fords:
95 T-Bird LX 4.6 - fully optioned, owned 15 years, 220k miles
96 Cougar XR-7 4.6- Brenda's car, owned 11 years, 187k miles
88 T-Bird 3.8 - first T-Bird, owned 5 years, 206k miles
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post #8 of 12 (permalink) Old 08-04-2017, 03:11 PM Thread Starter
50 years of Mercury Cougar 1967/2017
 
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6700 rpm, the 11.97.
200 rpm higher than the peak HP.

I need a better 60'.

That 11 was with 4:56 gears.

Best 60' was 1.65.

Quickest N/A Modular MN12.
1995 XR7-11.77 @ 113.29 (3537 lbs.)
01/31/18 PBIR
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post #9 of 12 (permalink) Old 08-04-2017, 05:34 PM
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Thumbs up IRS rear suspension

Rick, when I ran the IRS, this attached photo shows most of the goodies. QA1 adjustable rear shocks (2003-04 Cobra) Supercoupe rear coils with 1 coil cut off, poly rear spring seats, (upper and lower)Airlift bags inflated as needed for track conditions. Delrin bushings at the knuckle and at the lower arm pivots from a MK 8 gentleman who has since past away. Custom aluminum subframe bushings of my design. Rear pinion brace from MN12 performance, Aluminum rear end bushings on the front, and custom rear mount. Cover brace. Large supercoupe rear sway bar. DDS level 5 axles and hubs. I might be missing a few details, but hell that was over 5 years ago.

Best 60' on the IRS was around 1.48.

Mike.....
Attached Images
File Type: jpg 110.JPG (636.0 KB, 6 views)
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95 T-Bird 4.6 Twin Screw Supercharged
10.0 Best ET and 138 Best MPH
1.44 60' time on Hoosier Drag Slicks
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post #10 of 12 (permalink) Old 08-04-2017, 07:25 PM
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On My car Rick!

4.5 inches of clearance standing from center of slick to lip. Not a lot when squatting at the track. Even worse with big Horsepower like EECDOC had with the Blower at the time. Not to mention as Mike has already stated look at the clearances to the front of the wheel well.
Attached Images
File Type: jpg 29 x 10 Hoosiers on 1MTNCAT 1.jpg (2.47 MB, 4 views)
File Type: jpg 29 x 10 Hoosiers on 1MTNCAT 2.jpg (2.54 MB, 5 views)

Steve
1996 Cougar XR7 Special Edition (Street & Strip)
"There's a bad, built NA 4.6L COMING Spring-Summer 2018"

Elite member of the Halfshaft snapping, Auburn eating, Tranny crunching, Piston Melting, Tire lifting, 500+ lb ft Torque Club.

Cougar ET-Stock 4.6 shortblock/Stock PI headswap Bullitt NA 12.94 @ 105+
Nitrous 11.75 @ 114 MPH

2008 Ford Powerstroke 6.4 TT F250 4X4 Supercrew: 12.82 @ 105 MPH

"IN MEMORY OF MY FRIENDS JOEL BENDER 1979-2006", JOHNNY LANGTON 1975-2011, and MICHAEL VIVERETTE 1953-2013"
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post #11 of 12 (permalink) Old 08-04-2017, 07:40 PM
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And one more from the rear.
Attached Images
File Type: jpg 29 x 10 Hoosiers on 1MTNCAT 3.jpg (2.46 MB, 8 views)
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Steve
1996 Cougar XR7 Special Edition (Street & Strip)
"There's a bad, built NA 4.6L COMING Spring-Summer 2018"

Elite member of the Halfshaft snapping, Auburn eating, Tranny crunching, Piston Melting, Tire lifting, 500+ lb ft Torque Club.

Cougar ET-Stock 4.6 shortblock/Stock PI headswap Bullitt NA 12.94 @ 105+
Nitrous 11.75 @ 114 MPH

2008 Ford Powerstroke 6.4 TT F250 4X4 Supercrew: 12.82 @ 105 MPH

"IN MEMORY OF MY FRIENDS JOEL BENDER 1979-2006", JOHNNY LANGTON 1975-2011, and MICHAEL VIVERETTE 1953-2013"
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post #12 of 12 (permalink) Old 08-05-2017, 06:31 PM Thread Starter
50 years of Mercury Cougar 1967/2017
 
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Thanks guys.

Quickest N/A Modular MN12.
1995 XR7-11.77 @ 113.29 (3537 lbs.)
01/31/18 PBIR
THE danner EATER
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