The 2011+ Mustang Thread

[Sax1031]

Originally Posted by wbt

No I am not. It is posted in front of your eyes in black and white. You clearly have 0 idea what you are even trying to infer. Time to move on.

You would have a point with your numbers if the cars had the same redline.

[wbt]

Originally Posted by Sax1031

You would have a point with your numbers if the cars had the same redline.

Not sure how more clear I can be here.

Mustang GT with 3.31 gear in 4th rolls across the 1320 mark at 5,940RPM @ 112. Very close to it's sweet spot.

Camaro LS3 with a 3.45 in 4th rolls across the 1320 mark at 4,5300RPM @ 112. Not at all close to it's sweet spot.

Now for those of us who have had a decent amount of experience running down the 1320 this is a very clear picture.

To get a LS3 powered Camaro running at it's sweet spot in the 1320 @ 112 MPH you are looking at a 4.30. That would net you 5,646RPM.

Granted when the 4.30 becomes available, you are more likely to see 115MPH stock LS3 runs @ ~5,800RPM. If one can get it to 6,000RPM by the end in 4th, that would be 119MPH. That is moving.

Swing this back around to compare with a Mustang GT running a 3.31 gear and I think we know which car wins that race with comparable gearing.

[KungFuHamster]

Originally Posted by wbt

Mustang GT with 3.31 gear in 4th rolls across the 1320 mark at 5,940RPM @ 112. Very close to it's sweet spot.

are you talking about the new 5.0? because if you are, 5,940 is nowhere near its sweet spot...more like 7,000 is right.

[THE EVIL TW1N]

Originally Posted by Sax1031

You would have a point with your numbers if the cars had the same redline.

exactly, thats the part he doesnt understand. The Mustang has better gearing, yes. But hes overestimating by about 10% and theres no way any car would gain 5mph from gearing. (hes suggesting 115mph traps) At most you gain 1mph for every 15%, but lots of times you dont gain much MPH at all.

[wbt]

Originally Posted by KungFuHamster

are you talking about the new 5.0? because if you are, 5,940 is nowhere near its sweet spot...more like 7,000 is right.

~6,500RPM is where it makes peak power.

[Sax1031]

Apparently the 2011 GT wakes up a lot when you raise the rev limiter and allow it to shift at even just 7krpm.

Being able to shift back into the power band is far more important than the car making peak power at 6.5k-6.6k rpm.

[KungFuHamster]

Originally Posted by wbt

~6,500RPM is where it makes peak power.

most people that ive seen dynoing these cars are making power past 6500. 6800-6900 is reasonable. factory rev limiter is 7k if im not mistaken.

[wbt]

Originally Posted by THE EVIL TW1N

exactly, thats the part he doesnt understand. The Mustang has better gearing, yes. But hes overestimating by about 10% and theres no way any car would gain 5mph from gearing. (hes suggesting 115mph traps) At most you gain 1mph for every 15%, but lots of times you dont gain much MPH at all.

Sigh....

Do the math. If you think I am overestimating then show it. Offer something constructive otherwise go post on the Mustang forums. I am sure they would love to have your "insight".

This will be my last post on the subject. I laid it out for everyone to see. Choose what you may with it.

[8cd03gro]

Originally Posted by wbt

Not sure how more clear I can be here.

Mustang GT with 3.31 gear in 4th rolls across the 1320 mark at 5,940RPM @ 112. Very close to it's sweet spot.

Camaro LS3 with a 3.45 in 4th rolls across the 1320 mark at 4,5300RPM @ 112. Not at all close to it's sweet spot.

Now for those of us who have had a decent amount of experience running down the 1320 this is a very clear picture.

To get a LS3 powered Camaro running at it's sweet spot in the 1320 @ 112 MPH you are looking at a 4.30. That would net you 5,646RPM.

Granted when the 4.30 becomes available, you are more likely to see 115MPH stock LS3 runs @ ~5,800RPM. If one can get it to 6,000RPM by the end in 4th, that would be 119MPH. That is moving.

Swing this back around to compare with a Mustang GT running a 3.31 gear and I think we know which car wins that race with comparable gearing.

I hope you don't really think a stock ls3 in a camaro with 4.30 gears could trap 119. You're just comparing how many rpm the engine is spinning at a given speed with given gearing. You are giving zero consideration to power. There is no way in hell a 3850 lb car with 375rwhp is going to trap 119. In a perfect world, if both cars could possibly have "perfect" gearing, the mustang will be faster. It's simple physics. The units of horsepower, watts and any other measurement of power exist for this very purpose.

[Sax1031]

LOL if you think adding a 4.30 gear is going to raise your trap speed by 9 mph.

5 mph is even stretching it.

[wbt]

Originally Posted by 8cd03gro

I hope you don't really think a stock ls3 in a camaro with 4.30 gears could trap 119.

Not at all what I implied. 115, you bet. 119 not hardly.

[wbt]

Originally Posted by KungFuHamster

most people that ive seen dynoing these cars are making power past 6500. 6800-6900 is reasonable. factory rev limiter is 7k if im not mistaken.

Not at all what I have read. My last post. Night ladies. (fellow Mustang owners)

[THE EVIL TW1N]

Originally Posted by wbt

Not at all what I implied. 115, you bet. 119 not hardly.

doubt it, check this out: http://www.carcraft.com/techarticles.../photo_03.html

115mph?? LOL youre just pulling numbers out of your butt. Notice trap speed didnt change that much. Gearing doesnt change trap speed THAT much and at most (from personal experience) 1mph for every 15% if youre lucky.

heres another good article. http://www.carcraft.com/techarticles...rks/index.html

[Sax1031]

I seriously doubt you gain 5 mph with the gear change also.

I didn't come close to gaining 5mph when I went from 3.08 gear to 4.10 in my old fox body.