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  Tire growth at the end of the 1/4 mile?

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Author Topic:   Tire growth at the end of the 1/4 mile?
Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-04-2003 07:36 AM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
I want to run some taller slicks, but my clearance is limited. I'm wondering if anybody has any idea (approx) how much a drag slick 29" or 30" tall by 9" to 10" wide will grow at around 120 to 130 MPH?

Thanks

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-04-2003 11:51 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Mike, a biased ply slick will grow as much a one full inch in the sizes you specified.
A radial on the other hand will not grow at all.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
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The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-04-2003 01:25 PM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
Thanks Alex, that's exactly the type of info I was looking for.

So if I have a bias ply 10 x 30 slick and I have 1/2" of clearance from the tread surface to the fender lip at the front, would I be pushing my luck? It sounds like it might just rub if it grows 1" at high speed. How much clearance would you typically run at front or back with a tire like that?

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Fstln69
Gearhead

Posts: 535
From: Westmont,il
Registered: Jan 2003

posted 03-04-2003 02:05 PM     Click Here to See the Profile for Fstln69   Click Here to Email Fstln69     Edit/Delete Message   Reply w/Quote
Yeah it will,i like atleast 1" to 11/2" clearence on the very minimum

------------------
69 fairlane 351w [email protected] before M&M.. after??
always in search of more HP and faster ET'S

Fstln69 Pics Page

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-04-2003 02:26 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Mike, I would need to know more about your suspension.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-04-2003 02:33 PM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
I'm running stock type leaf springs with cal trac bars and gas shocks. Pinion angle is down 5 degrees. The closest place to the tire is at the very bottom of the wheel lip in the front. With my current 28" tires it has 1-3/8" clearance in that spot to the tread of the tire. I'm trying to decide if I can go taller.

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-04-2003 02:40 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
With what you currently have, you will need one full inch of clearance minimally! The only place you can safely have less room is in the section width area. You don't need more than a 1/2 inch between the tire and the leaf spring.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-04-2003 02:41 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I have some 9 x 30 used Goodyear Radials for $120 plus shipping. They have 48 runs on them.

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Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Ryan Wilke
Gearhead

Posts: 2060
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 03-04-2003 04:14 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
FYI........
I was just at www.mickeythompsontires.com and they say that there will be some tire growth differences between tire makes, but that their ET DRAG slicks will grow from 1" to 1.5" @ 150-mph.

So we see once again -- our own resident champion, multiple title-holding, dragracing extraordinaire has provided expert knowledge willingly & free to us unworthy underlings!!!

ALL HAIL TO ALEX THE GREAT!


Ryan

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-05-2003 07:19 AM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
Thanks for the offer Alex, that sounds like a good deal, but the 30" tall tires only gives me 1/2" of clearance at the front of the tire. It sounds like from what you all have said I need to go with something a little shorter.

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-05-2003 09:01 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
They are radials and actually only measure 29.2 inches.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

[This message has been edited by Moneymaker (edited 03-05-2003).]

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-05-2003 09:35 AM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
Would the radials work okay with a stick shift and (hopefully) alot of hp?
The jury is still out on that one.
It's about 50/50 from the limited amount of testing I have been able to get my stick friends to do with radials.
The general consensous is NO!
A couple of the high HP big block stick stockers were at a test session last year and tried some Hoosier radials. They spun like they were on ice. But....the track (Stanton) sucked and everyone spun. The same cars also spun with biased tires so the test was inconclusive in my oppinion.
But, every stick car that we have gotten to at least TRY a radial on a decent track has been able to hook great. Unfortunatly that has only been two so far.

[This message has been edited by Moneymaker (edited 03-05-2003).]

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 03-05-2003 09:51 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Oops, I meant to do a quote. see above.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com

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Mike_R
Gearhead

Posts: 176
From: Indianapolis, IN 46237
Registered: Feb 2001

posted 03-05-2003 10:17 AM     Click Here to See the Profile for Mike_R   Click Here to Email Mike_R     Edit/Delete Message   Reply w/Quote
Wow, I got confused there for a second.

Thanks alot for the info, it's really helpful.

It sounds like I may be better off with bias ply but it's going to be a little while before I have the big engine in it. So I think I'll wait until then and see if any new info comes up (and how much money I have left). I just put a fresh N-case 4.56 detroit locker with a daytona pinion support and billet yoke in it last fall. That would have been perfect for the 460, but the stroker engine will be winding pretty hard at the end with those gears. I guess worst case I could change gears again, much as I hate to.

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Ryan Wilke
Gearhead

Posts: 2060
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 03-13-2003 07:41 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Mike_R:
....I just put a fresh N-case 4.56 detroit locker with a daytona pinion support and billet yoke in it last fall. That would have been perfect for the 460, but the stroker engine will be winding pretty hard at the end with those gears...

Yaw, come on, Mike,,,build your fat block strong & true and bolt 'er in -- then let the big mil sing at the upper rpms...!!!!

Ryan

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