sdsguy

that many hard passes plus all the other hard driving i'm sure they've been doing, it should have given up earlier

Sam I am

Damn, that's impressive. My car is still in Michigan, it was supposed to have been here on April 30th. Needless to say, I'm getting a bit peeved.

Sam I am

Oh, and vote for me! ROTM!

Gene K

Evolution wants you to know they appreciate the loan and will send it along as soon as their through with testing and parts development.

Tylus

have they done a full write-up on their findings yet?

Whoever gets their #'s to the press first is going to have a real coup on the other Tuners. Can't wait to see if these #'s are repeatable
I agree. just thought that was interesting since we typically get 15% on the 05-09's...do the 10's hold the same losses with their 6 speed?

Driver72

Not DR's but full on Mickey Thompson slicks.

Modded engine, slicks and a dozen or so back to back launches on slicks can do that to a clutch.

I'd be more interested to see what they could of/would of done on street tires (OEM Summer's that come with the Brembo package) would be nice.

Driver72

Yeah I read that the 3.73's top out at 110 mph in 4th.
That really sucks. Full well knowing the car could do at least 112 mph in the 1/4, can't believe Ford didn't make 4th good for 113-114 mph with the 3.73's

Then you'd be blasting through the traps right up near redline in 4th.
The fact 4th redlines at 110 mph in a 5.0 V8 is crazy anyway.

IIRC, my old 5.0's from the late 80's did 115 mph in 3rd!!


I would love to see a 2011 GT tested with the 3.55's tested side by side with one with 3.73's
As I said in a post many weeks ago, I suspect it's possible the 3.55's might run close to equal to the car with the 3.73's stock and probably a bit faster modded.
You can launch the car a bit harder with the 3.55's, get less wheelspin going into 2nd and even 3rd, and surely hold 4th through the 1/4.

Because of that, I'm not sure whether to order 3.55's or 3.73's.
Need some show downs to solve this dilemma.

Gene K

Im pretty sure you ar going to have a very hard time telling the difference on real street tires in any of the gears.

1st 3.66 - Spin any where with any of the gears
2nd 2.43 - Spin hard after the change with 3.73 and likely 3.55. Might hook with 3.31 which will be able to carry this gear farther.
3rd 1.69 - This is where 3.73 and 3.55 will start to earn their keep. 3.31 will be able to carry it farther.
4th 1.32 - 3.73 hits limiter 100' short of finish, 3.55 hits limiter at finish line, 3.31 @ 6500 rpm at finish.
5th 1.00 - If you chose to go here with the 3.73 you will pick up a couple of mph but it wont pull with any authority.
Those rpms are for the rediculous traps you get in outragous air.

I and Bob Cosby have had several conversations on this and eventually came to a conclusion that the hot ticket may be 3.73 / 26" Tires and a rpm limiter so high it makes your noise bleed but then Bob's always been a "Gear Hoar" (his own words). For us mere mortals we came to the conclusion its going to be very hard to tell a difference on real street tires. Bob felt like the car doesnt make enough power to warrant tall tires and they will just slow you down and I agreed.

For people like me that like to beat their head against the wall trying to get that elusive 1.79 on real street rubber it just isnt going to matter much. I basically chose 3.55 because it will pull the harder than 3.31 at the finish line and wont give me rpm issues on a 100% Showroom Stock Car. I intend to see just how quick and fast that can be come next winter when the airs a 1000' Below.

Really without stickies gears are simply going to be useless in this car.

Just my opinion that and a buck will buy you a cheap cup....

Driver72

Gene, here's my thought on this.

I'm thinking of getting the best of both.
If you order the 3.73's they are a bit too short for stock 1/4 mile runs as you have to shift to 5th (and in the process drop ET's and traps since you'd shifting in that critical last 66' speed trap area).
But with 3.55's you'll lose a bit in acceleration in 3rd and 4th to a 3.73 geared car.

I will 99% chance be modding the car (I always do) to make a bit more power, so either way with 3.55's or 3.73's I'd need to shift into 5th to finish the 1/4 mile.

So the best of both works like this:

Get the 3.73 geared car. As I will also more than likely put aftermarket wheels on the car, very possible go with 20's that weigh no more than the 29 lbs weight of the 19's.
Then when it comes to tires, instead of the OEM
255/40/19 go
275/35/20

This tire is 3/4 inch wider than the stockers for more grip.
And it's 1/2 inch taller overall (or 2% taller).
That effectively drops the 3.73 gear ratio to 3.65. A perfect happy medium.
The problem is, I'm not sure I want 20 inch wheels and with the 275's, the sidewall is only .2 inches shorter but I worry the 1/2 taller overall diameter is going to look too big (though the wheel wells on the Mustangs are big so it may be fine).
I know you said Bob said the car does not have enough power to warrant tall tires, but by tall how tall is he referring? And I'd think 412 hp in a 3600 lbs car is plenty to offset a 1/2 height gain. And with 30-40 more hp in mods, I'd think it would be perfect.


If so, you heard it here first.

Gene K

Im pretty sure Bob was referring to the 29" DR's some are talking about on the 3.73 cars.

From what I have seen so far a 120 mph trap with full bolt-ons like Longtubes, Offroad Pipe, Straight Throughs, Air Intake, Tune and maybe UDP) is going to be doable in good air. Evolution just went 117 mph with no headers, stock air box and no UDP's (Which again I think will give minimal gains).

That means 122mph at the finish so roughly 7300 rpm with 3.55. You are going to need to spin near 7700 rpm with stock size (765 rpm in my case) tires with 3.73 to stay in 5th.

Not arguing with your gears at all you just may need taller tires to make it work. At least a 28" to keep it below 7500 rpm in 4th.

Bob makes a good argument that the car will be just as fast riding the limiter the last 100' with 3.73 as with 3.55 if you have stickies so you can take advantage of them at the launch.

Some people will want to totally regear the car to make it work in 5th but but 3.66 x 4.56 just seems like to much to me.

Not recommending anyone go my way with gears. Just telling you how my car ended up with 3.55. I just think they are best for my use. I get a lot of personal satisfaction out of really good pass on real street tires.