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Author Topic:   Tire Size
RickBook
Gearhead

Posts: 139
From: Houston, TX
Registered: Apr 2002

posted 03-06-2003 09:06 AM     Click Here to See the Profile for RickBook     Edit/Delete Message   Reply w/Quote
I'm nearing the point where I will be putting slicks on my '70 Grabber and am not sure what diameter to get. I hear different opinions in what to use - small diameter (26") or larger (29.5").

F.Y.I. I am running a 347 c.i. with 200 shot of nitrous out of the hole.

I have a C4 (with a 10" 2800 stall).

My gears are 410's.

I only run the 1/8th.

My shift point is ~5900 rpms.

I will probably try to borrow different size slicks (26" and 29.5") to see what the differences will be, but in the mean-time, I thought I'd ask.


Anyone care to give me their opinion?


Thanks guys,

Rick

[This message has been edited by RickBook (edited 03-06-2003).]

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Just Strokin
Gearhead

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 03-06-2003 09:51 AM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
Have you measured your wheel tubs to see what might or might not fit? This will narrow down the possible slick combo's you can choose from.

My thoughts are to stick with the 26" or 27" slicks since you are running the 1/8th with 4.10 gears.

------------------
Larry

No fast Fords at this time but one fine cruising 96 F350 CC DRW Power Strokin diesel.
And one rusty 64 Fairlane nick-named the Rust Bucket....And sometimes called the Money Pit...

The sounds of a brain dropping into gear.....
"Buzzzzzz.......Click"

[This message has been edited by Just Strokin (edited 03-06-2003).]

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Tea'sGrabber
Gearhead

Posts: 117
From: Seattle, Wash.
Registered: Feb 2003

posted 03-06-2003 10:24 AM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
I'm using 28x9 Goodyears. I've used 26" and my 60' times were slower. Car wouldn't hook using the 26" with 200hp shot. I have a 4500 rpm converter that JPT built that flashes about 5200. So I'm leaving at alot higher rpm than you.. Man I hope you have a 9"... If not leaving with a 200hp shot and hooking hard is going to scatter that 8".. I'm only 306cu. And I broke 2.... No fun @ 120mph!!!

------------------
Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.

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CometGT1974
Gearhead

Posts: 158
From: Asheville, NC USA
Registered: Jan 2002

posted 03-06-2003 10:37 AM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
Rick, the 26" tall tire is hard to get hooked up on the NOS....I should know, i've been battleing the 26x10 for the past couple seasons. If I had my choice I would go with a 28x10 but they restrict my class to the 26. i've seen a maverick with a 28x9 on it but I dont' think the 28x10 will fit without mini-tubbing!!

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RickBook
Gearhead

Posts: 139
From: Houston, TX
Registered: Apr 2002

posted 03-06-2003 12:04 PM     Click Here to See the Profile for RickBook     Edit/Delete Message   Reply w/Quote
Todd: Yes, it's a 9" rear - (Yikes! on the break @ 120 mph)and good comparison information - thanks. I'm surprised (and encouraged) to hear you're launching okay at higher rpms and a 200 shot on 9". What kind of 60' are you getting? Are you spinning any?

Comet1974: Good information also. I remember your similar post on the maverick.to message board about those rules (my local track doesn't impose that restriction).I was hoping to at least get the 28 X 10's under there though. Yes, I thought about mini-tubbing. I'll be doing that as a last resort.

Looks like it's down to 28 X 9's or 27 X 10's (sounds like they'll fit in the wheel wells with a little safety margin).

I'm just scared the 9" won't hook as my heavy 90 Mustang Convertible would spin on 28 X 10's when the (same) engine was in it (with a 150 shot). The flash was only around 2800-3000 on it. Thinking out loud - the Stang didn't have as good of suspension as the Maverick is going to have Cal-Tracs vs the slightly modified-for-handling on the Mustang rear - although I did get consistant 1.5XX 60 ft's - go figure??)

Decisions, decisions.

I'm thinking the 27 X 10's will be a good compromise.

All good info guys - much appreciated!

Rick

------------------
Building 1970 Grabber, 347 EFI, C4, 9", 6pt for strip.

[This message has been edited by RickBook (edited 03-06-2003).]

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Tea'sGrabber
Gearhead

Posts: 117
From: Seattle, Wash.
Registered: Feb 2003

posted 03-06-2003 04:31 PM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
I've tried 27x10's...They will hit or rub on the leafsprings.. The 28x9 Goodyears fit perfect... They're a D-5 compound and the hook hard!!!! Feels like someone hit's you in the tailbone with a sledge hammer... Wheels about 2feet in the air!!! People always follow me back into the pits and their jaws hit the floor when they see 306cu with cast iron heads go 10.70's!!!!! lol!!!!

------------------
Todd 71 Mav Grabber All orig 306 cu.in. Cast Iron heads. Carillo Rods.Best et. 10.71 @ 124 thru the mufflers.

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CometGT1974
Gearhead

Posts: 158
From: Asheville, NC USA
Registered: Jan 2002

posted 03-06-2003 05:06 PM     Click Here to See the Profile for CometGT1974   Click Here to Email CometGT1974     Edit/Delete Message   Reply w/Quote
When I had the 9" narrowed it ended up coming out to like 1/2" shorter then the stock 8" unit. I am now running the bogarts which are 15x9 w/ a 4.25" backspacing and the 26x10 fits without rubbing anywhere!! I guess I got lucky because I didn't exactly plan it that way! The 26x10 seems to be the biggest tire I can get under there....I think anything wider would rub the new leaf springs and anyting taller would rub on the wheel well. Drag slicks grow, so if it's really close to the wheel well it will probably rub at 100 mph!!

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Tea'sGrabber
Gearhead

Posts: 117
From: Seattle, Wash.
Registered: Feb 2003

posted 03-06-2003 05:51 PM     Click Here to See the Profile for Tea'sGrabber   Click Here to Email Tea'sGrabber     Edit/Delete Message   Reply w/Quote
I have 15x8 torque thrust II's 4.5" back spacing.... Now my ET streets are 28x11.5".They come close to the leafsprings and if I bottom out the shock they rub on the wheel wells...... Anything with a 10.7" or bigger section width on an 8 wheel is going to touch the springs...

[This message has been edited by Tea'sGrabber (edited 03-06-2003).]

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