28" v 26" slicks?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
28" v 26" slicks?
I am building a strip only C4
383 HSR ,TH400 ,with 4 bar 9" rear.
Was planning on running a 26 x 10/15 slick but have been offered a pair of new 28 x 10.5 /15s at a
can't refuse price.
Have room to run them , have not finalised rear end ratio.
Any advantage / disadvantage over smaller tyre?
383 HSR ,TH400 ,with 4 bar 9" rear.
Was planning on running a 26 x 10/15 slick but have been offered a pair of new 28 x 10.5 /15s at a
can't refuse price.
Have room to run them , have not finalised rear end ratio.
Any advantage / disadvantage over smaller tyre?
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
If you are going with 4.56 gear the tires will work but they will stick out one hand width outside the wheel well,you can catch the rocks as they fly into your helmet.
Just a piece of advice ,only do your burn out in 2nd gear or your trans will blow
Just a piece of advice ,only do your burn out in 2nd gear or your trans will blow
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Thanks
9" has been shortened to put wheels in stock position with 15 x 10 Welds 5.5" BS .
No stone chips!
By relocating the 4 bars to the inside of the frame, I can fit a 12" wide rim inside the stock wheel well
9" has been shortened to put wheels in stock position with 15 x 10 Welds 5.5" BS .
No stone chips!
By relocating the 4 bars to the inside of the frame, I can fit a 12" wide rim inside the stock wheel well
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
If you can fit a 12" under the rear I would go for it
Mine are 11.5 on weld 15 wheels.Put lots of babby power in the slick and screw them on and you will be loving it.I run mine at 10 lbs and at 9 lbs the front end is in the air .
I hope you can fit the trans blanket around yours ,my headers always cook mine .The 1 7/8 with the 3 1/2 collector cook my trans blanket.
I run the MT drag slicks,the medium compound,the soft sucks at the big end and the hard compound you have to burn them for a mile to heat them up.Our cars are heavy so you can't go to soft a compound.
Hope this helps
Mine are 11.5 on weld 15 wheels.Put lots of babby power in the slick and screw them on and you will be loving it.I run mine at 10 lbs and at 9 lbs the front end is in the air .
I hope you can fit the trans blanket around yours ,my headers always cook mine .The 1 7/8 with the 3 1/2 collector cook my trans blanket.
I run the MT drag slicks,the medium compound,the soft sucks at the big end and the hard compound you have to burn them for a mile to heat them up.Our cars are heavy so you can't go to soft a compound.
Hope this helps
Race Director
Joined: Jan 2003
Posts: 15,177
Likes: 90
From: State of Confusion
Since you haven't finalized the rear-gear ratio, run as-tall a slick as you can, and choose a gear-ratio that will provide the finish-line RPM/MPH results you anticipate, based-on HP/weight.
With a 28" tire, 4.56s, and a typical 'loose' converter, I'm guessing you get about 8.2 MPH for every 500 RPM you turn:
I had the same set-up in my Z28 at one-time, and would turn less-than 6500 RPM @ 105 MPH in the traps.
With a 28" tire, 4.56s, and a typical 'loose' converter, I'm guessing you get about 8.2 MPH for every 500 RPM you turn:
I had the same set-up in my Z28 at one-time, and would turn less-than 6500 RPM @ 105 MPH in the traps.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
For class racing where the last thousandth in ET counts, you want your tires as small and as light as will do the job. For bracket racing, where consistency is the key, a little overkill doesn't hurt. The larger the diameter the tire, all else being equal, the longer the footprint is has with the pavement. More tire contact equals more bite.
RACE ON!!!
RACE ON!!!
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Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
The MT ET drags I am looking at are listed as tube types.
Can you safely run them without?
The MT site says
"Besides being required for air retention, Mickey Thompson racing tubes will enhance the reaction time, increase stiffness and reduce sidewall shock and deflection when launching".
I was always of the belief that the sidewall deflection/ shock was what allowed a slick to put a bigger footprint on the track v a street tyre ?
Can you safely run them without?
The MT site says
"Besides being required for air retention, Mickey Thompson racing tubes will enhance the reaction time, increase stiffness and reduce sidewall shock and deflection when launching".
I was always of the belief that the sidewall deflection/ shock was what allowed a slick to put a bigger footprint on the track v a street tyre ?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Instructor
Joined: Oct 2004
Posts: 247
Likes: 0
From: Montanja Noord Aruba