Frame Notching to Accomodate Slicks???

[RUNUPIFUDARE]

What tires are people using that have successfully notched their rear frame rails to put slick underneath? I was the thinking of 26x11.5x17 or 28x11.5x17 or something similar to fit. This article says that, "P325/50R15’s or 11.5X28.00-inch slicks, using the stock inner wheel well (tub). Best of all, it can be accomplished at stock (or close to stock) ride height, thus preserving the suspension geometry."

Check Out this Web Site!!!!
http://www.maxchevy.com/tech/2008/iii_8-frame-1.html

PHOTOS PLEASE!!!

 

[86Cutlass383SR]

Lost of good info on frame notching and tire sizes over on www.MalibuRacing.com

Doug

 

[NAILS]

im running 295/65-15 drag radials. its about 30" tall with a section width of about 12.5 and a tread width of almost 10.5

fills the wells up nice and doesnt come close to rubbing even on the hardest launch. my car hooks mint with them as well.

 

[jsereno3]

I NARROWED MY RAILS AND IM RUNNING 29.5X9X15 WITH NO CLEARANCE ISSUES. HAD 29.5X10.5 BUT THEY RUBBED A BIT.

 

[shotgun]

Notch smotch, real men get it done with a stock wheelwell.

My next car will have a "little" adjusting done. :wink:

 

[86Cutlass383SR]

What amazes me are the EZ Street cars that are in the ORSCA (Outlaw Racing Street Car Association). The records in this class are 1/8th mile at 4.854 and 150.83 mph. Stock suspension (aftermarket arms are allowed but must bolt to factory locations) with 325/50/15, the 295/55/15, and the 275/60/15 drag radials (no slicks) and maximum 12" wheel. Minor notching allowed. No wheelie bars allowed.

I've seen these cars and if they hook (IF) they usually sit on the rear bumper! I've heard they are running upwards of 1200 - 1400 hp (?).

4.8's @ 150 on the rear bumper on drag radials with over 1000 hp and stock suspension...

WOW !!!!

Edit: Found some short vid clips I've collected. All are under 1 min each. Enjoy.

http://s683.photobucket.com/albums/vv19 ... elies2.flv
http://s683.photobucket.com/albums/vv19 ... reetQ1.flv
http://s683.photobucket.com/albums/vv19 ... -25-05.flv
http://s683.photobucket.com/albums/vv19 ... sting1.flv
http://s683.photobucket.com/albums/vv19 ... sting2.flv
http://s683.photobucket.com/albums/vv19 ... sting3.flv
http://s683.photobucket.com/albums/vv19 ... aneQ22.flv

And when things go very wrong........

http://s683.photobucket.com/albums/vv19 ... _00420.flv

 

[79MaliCrazz]

What tires are people using that have successfully notched their rear frame rails to put slick underneath? I was the thinking of 26x11.5x17 or 28x11.5x17 or something similar to fit. This article says that, "P325/50R15’s or 11.5X28.00-inch slicks, using the stock inner wheel well (tub). Best of all, it can be accomplished at stock (or close to stock) ride height, thus preserving the suspension geometry."

Check Out this Web Site!!!!
http://www.maxchevy.com/tech/2008/iii_8-frame-1.html

PHOTOS PLEASE!!!

I checked out this web site great info on it but my question is isn't the frame now weakened in that section cause of how thin the frame is there i know they welded new plate but doesn't look strong enough.Im thinking of doing it depending on the the feed back i can get cause im lowering the car and i might run 18x10 in the rear if i get it done.

 

[stomis]

What tires are people using that have successfully notched their rear frame rails to put slick underneath? I was the thinking of 26x11.5x17 or 28x11.5x17 or something similar to fit. This article says that, "P325/50R15’s or 11.5X28.00-inch slicks, using the stock inner wheel well (tub). Best of all, it can be accomplished at stock (or close to stock) ride height, thus preserving the suspension geometry."

Check Out this Web Site!!!!
http://www.maxchevy.com/tech/2008/iii_8-frame-1.html

PHOTOS PLEASE!!!

I checked out this web site great info on it but my question is isn't the frame now weakened in that section cause of how thin the frame is there i know they welded new plate but doesn't look strong enough.Im thinking of doing it depending on the the feed back i can get cause im lowering the car and i might run 18x10 in the rear if i get it done.

Considering the fact that they probably removed 18 or 20ga material and replaced it with 1/4in plate I doubt they lost much strength. Not to mention they added a cross tie to each frame rail to make it more rigid.

The physics of tubing design and whats stronger has alot more to do with it then just the straight size of it. Wall thickness has a huge amount to do with it.

 

[heavy d]

You can brace the frame to help make it ridged. I ran a tube across and thru the frame rails and welded it on both sides. Similar to a pickup truck frame. Once all the exhaust is run I'm going to add more bracing to the upper and lower control arms. Thats where your stress is. I'm also tubbing mine however so I cant tell you about stock tubs. I will have 13 inches from frame rail to rolled lip.

 

[79MaliCrazz]

Thanks for the info guys