Moving springs inboard ihra stock

House of Darts · 08-18-2011, 07:23 PM

Since IHRA allows a 10" slick for Stock the 3" inset gives the A body the space it needs.

Lambertcars · 08-18-2011, 08:22 PM

Page 49 of the IHRA Rule Book under Suspension states minor movement inboard of rear springs is allowed for tire clearance. I think that 3 in.on both sides is more than minor. What is the NHRA rule?
ALLEN

Wade Mahaffey · 08-18-2011, 10:12 PM

If your gonna move it enough for a 10-10.5 inch tire, you will be into the frame section. If you move it one inch or three inches, it still requires the same amount of work. Also the same areas and components to be modified plus a half of a tub. ONLY ALLOWED IN CRATE MOTOR STOCK. I believe the intent is to allow you to put a 10-10.5 tire under the car properly and safely. And to do that you should have 13-14 inches of clean tire area. A Duster has about 14 inches give or take, from the quarter panel (wheel opening lip) to the frame flange (spot welded to the floor) and you will need it all to do it properly. Then you will need about a 2 inch extension to the wheel tub. The rule book says minor inward movement (how much is that) to me it's the minimum it takes needed for a 10 inch tire to have the safe tire/body clearence and no more. They said you could move it, and they said you could use a 10 inch tire. Do what you need to make that happen and no more. Having said all of that, the best way to do this is send photos to IHRA TECH DEPT. (Hank or Mike) of what you want to do and why...present your case, and you will be fine.

Wade Mahaffey

Harry 6674 · 08-19-2011, 10:33 AM

Quote:

Originally Posted by Lambertcars

Page 49 of the IHRA Rule Book under Suspension states minor movement inboard of rear springs is allowed for tire clearance. I think that 3 in.on both sides is more than minor. What is the NHRA rule?
ALLEN

NHRA is zero.

08-18-2011, 07:23 PM	#1
House of Darts Member Join Date: Mar 2007 Posts: 346 Likes: 19 Liked 20 Times in 15 Posts	Re: Moving springs inboard ihra stock Since IHRA allows a 10" slick for Stock the 3" inset gives the A body the space it needs.

08-18-2011, 08:22 PM	#2
Lambertcars Member Join Date: Aug 2005 Location: Johns Island SC Posts: 114 Likes: 0 Liked 1 Time in 1 Post	Re: Moving springs inboard ihra stock Page 49 of the IHRA Rule Book under Suspension states minor movement inboard of rear springs is allowed for tire clearance. I think that 3 in.on both sides is more than minor. What is the NHRA rule? ALLEN

08-18-2011, 10:12 PM	#3
Wade Mahaffey Senior Member Join Date: Apr 2007 Posts: 581 Likes: 0 Liked 17 Times in 7 Posts	Re: Moving springs inboard ihra stock If your gonna move it enough for a 10-10.5 inch tire, you will be into the frame section. If you move it one inch or three inches, it still requires the same amount of work. Also the same areas and components to be modified plus a half of a tub. ONLY ALLOWED IN CRATE MOTOR STOCK. I believe the intent is to allow you to put a 10-10.5 tire under the car properly and safely. And to do that you should have 13-14 inches of clean tire area. A Duster has about 14 inches give or take, from the quarter panel (wheel opening lip) to the frame flange (spot welded to the floor) and you will need it all to do it properly. Then you will need about a 2 inch extension to the wheel tub. The rule book says minor inward movement (how much is that) to me it's the minimum it takes needed for a 10 inch tire to have the safe tire/body clearence and no more. They said you could move it, and they said you could use a 10 inch tire. Do what you need to make that happen and no more. Having said all of that, the best way to do this is send photos to IHRA TECH DEPT. (Hank or Mike) of what you want to do and why...present your case, and you will be fine. Wade Mahaffey Last edited by Wade Mahaffey; 08-18-2011 at 10:16 PM.