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tire size change up question...
#878746
12/13/10 02:21 AM
12/13/10 02:21 AM
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Joined: Feb 2003
Posts: 1,730 Red Deer, Alberta
bill_greenwood
OP
top fuel
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OP
top fuel
Joined: Feb 2003
Posts: 1,730
Red Deer, Alberta
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I have worn out my 9x30 M/T radial drags, and thus need new slicks this season. Now, with my convertor change, I picked up in the 60' only to find the car not pulling as well down track. Where I used to run 118-119 @ 7100, the car now runs 116-117 @ 6700, so switching to a 28" tire looks to make sense. Are 10" wheels and 9x28 tires (vs 9x30) a workable package? The other change I'd like to make this year is a rear shock upgrade. The car has a 4-link/floater held up by stock 6-cyl leafs. Any shock recommendations? link to half-decent launch vid- http://www.youtube.com/watch?v=TNtkeUzzC9Q
Last edited by bill_greenwood; 12/13/10 02:25 AM.
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Re: tire size change up question...
[Re: Cab_Burge]
#878748
12/14/10 02:04 AM
12/14/10 02:04 AM
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Joined: Feb 2003
Posts: 1,730 Red Deer, Alberta
bill_greenwood
OP
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OP
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Joined: Feb 2003
Posts: 1,730
Red Deer, Alberta
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Actually, Cab, I've been running the 9x30 on 10" from the get-go. Where things have changed is the new convertor leaves a solid .05 better in the 60', but is slower from the 330 on. It appears that it locks up tighter than the old convertor did, and my little torque-challenged 360 just can't pull as hard because of it. Given that, as these tires are plumb wore out I'm thinking that going to a 28" tire would help give me more effective gear for the entire length of the track. I wasn't sure that 10's work with 9x28's, but if there are people running 12's on 9x30's I should be okay. The old convertor was a TCS 4-4200, the new one has about 500 rpm more stall. The change on the launch was like night and day, but it sure slowed the car down, overall.
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Re: tire size change up question...
[Re: bill_greenwood]
#878749
12/14/10 02:31 AM
12/14/10 02:31 AM
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Joined: Jan 2003
Posts: 6,266 Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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You'll be fine, Lots of guys run a wider wheel, it helps stiffen the sidewall up substantially and allows the tire to work. Is your rear end moved backwards or are your wheel openings altered?
-Dustin 67 Dart, 9 second, 392" G3 Hemi 68 Barracuda 340 F/SA
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