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Discussion in 'SVT Shelby GT500' started by GT500R, Oct 5, 2013.
How would I go about getting the exact gear ratio from the 2013 into my 2007?
I believe the 13's have 3.31's just like the 07's, but the gears should be universal for 07-14 .
If you are asking about axle ratio, as mentioned, the '13/'14 GT500's use a 3.31 ring and pinion. That is the same ratio as what your car came with.
Same axle ratio, but different gear ratio right? To make them the same I would need new gears from the 13' right?
So you want the '13 ring and pinion but understand the ratio is the same as what you already have?
Not real sure if you're talking about transmission gear ratio or rear end gear ratio.
If you're talking rear end they are the same as metioned nothing required.
Right, rear end ratio the same - 3.31
If I want the same mph in each gear as the 2013, I would need to get new gears to match the 2013 right?
No, your rear gear you have is the same already. The only difference is the transmission gearing. If you want that exact MPH in each gear that the 13 has you would have to use a 13/14 Transmission. Why so set on having the same gearing as a 13? Its not much different.
Gears = rear end.
You are talking about the transmission. You'd need a tranny out of a 13 to do what you are asking about.
I'm guessing the OP wants the 200mph top speed that the 13 has, if this is the case you will need more mods than just the trans from a 13.
Ya, at least another 150rwhp most likely.
Bingo, so I would need the tranny to hit over 200+ and have those long gears, gotcha.
Thanks for the help guys :beer:
To me it looks like very little if anything is different with the 2011 to 2013 as it relates to top end pulling, if the 2011 also had a 3.31 and 650+ hp. Yes the 1st gear and 2nd gear are different in the 2013 and a small difference in 5th........Then the 2007 is different yes, but with the amount of power needed, it could pull those numbers. The question is, how far do you have to get to that 200mph? It takes a long stretch for the 2013 to get to 200mph.
Selected Gear Ratios
Model 1st 2nd 3rd 4th 5th 6th Reverse
2007 Ford Mustang Shelby GT500 2.97 1.78 1.30 1.00 0.80 0.63 ?
2011 Ford Mustang Shelby GT500 2.97 1.78 1.30 1.00 0.74 0.50 ?
2013 Ford Mustang Shelby GT500 2.66 1.82 1.30 1.00 0.77 0.50 3.98
There's no reason, other than horsepower, that you couldn't hit 200 in 5th with a 3.31 rear gear ratio.
I think the fuel delivery on a lot of modded cars isn't set up for long pulls in 5th. I know some TX mile guys have found this out the hard way.
The 5th gear difference between the 2007 and 2013 (.80 vs. .77) is minimal, if that is the gear used for the top end pull. So with the minimal upper gear differences and an equal 3.31 gear set in the axle, it is going to be the hp that achieves that 200mph goal, as you stated. Of course the frontal area of a 2007-2009 is a little more "blunt" comparison to the 2010-2014 so that too has to be overcome. I believe I read earlier in 2013 testing that it takes a mile, or more to get to that 200mph speed. It may have even been 1.5+ miles to get to 200mph?
I've seen a stock '13 get go 174 mph at the Texas Mile. He came back later and got to up 193 mph with bolts-ons. So you are correct, it's going to take a lot more road to hit 200. I went 185 in a '12 with a TVS and bolt-ons. With 3.73s, I was close to 6,200 at 185. I blew a head gasket in the process, so staying that long in boost can have some consequences. You better have an upgraded driveshaft that can handle the speed too.