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Old February 9th, 2011, 07:30 AM   #26
majurbludd
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Default Re: Trying to figure out tires.

so what kind of gear ratios exactly would you need to run those tires?
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Old February 9th, 2011, 03:51 PM   #27
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Default Re: Trying to figure out tires.

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so what kind of gear ratios exactly would you need to run those tires?
No idea. I'm hoping the motor I put together has enough low end to deal with them.

I'm putting a 19xx in it for mock up and to get it rolling, then planning on a 2332. We will see how the 19xx motor fairs and then figure out what to do from there. I'm pretty much stuck with 235/75s right now, so that's under a 30" tire, and we have a buggy at the shop running that size and it didn't have any issues driving around on a stock trans and 1600.

Also have a sandrail that a guy gave us because his kid hit the trans on a rock and destroyed it. It has 32x11.5s and had a stock 1600 and he said it hauled ass. Granted its a bit lighter, but I really don't think I'll have a problem.

I can always be completely wrong though.
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Old February 9th, 2011, 04:07 PM   #28
Unkl Ian
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Default Re: Trying to figure out tires.

There are Gear Calcs online, that will figure out
speed based on rpm, ratio and tire od.

Most people look for around 3000 rpm at 60 mph, for cooling.

If the fan turns too slow, you will have a problem eventually.
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Old February 10th, 2011, 05:59 AM   #29
MrChainsaw
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Default Re: Trying to figure out tires.

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Originally Posted by Unkl Ian View Post
There are Gear Calcs online, that will figure out
speed based on rpm, ratio and tire od.

Most people look for around 3000 rpm at 60 mph, for cooling.

If the fan turns too slow, you will have a problem eventually.
That's pretty much my only concern right now. I'm hoping a large oil cooler and extra sump will help deal with the heat.

Or I'll just have to drive faster
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Old February 10th, 2011, 07:47 AM   #30
Unkl Ian
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Default Re: Trying to figure out tires.

Do the math.
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