Whats your Top speed with 4.10s?

smokin'Red35th · Jul 6, 2004

Has anyone topped out their stang with 4.10s? whats the fastest everyone has gone and what was your RPM at?

The reason i am asking is that I ordered the gears and their in waiting for me to get back from overseaas. However, i am going to italy in september for 3 years and i am taking my car with me. What i am worried about is weather or not i will regret having them because of how they may limit my top cruising speed. I plan on cruising the autostrade quite often.

Anyway, i just wanted to see what the RPMs would be at higher speeds
Thanks!

Defleshed · Jul 6, 2004

MMmmmmm.... I forget what my RPMs were, maybe upper 3ks? 4 grand? But I was going around 125mph. Didnt want to try to top it out though. I've heard it tops out theoretically at 200, but in reality, 160. Dunno.

StngStr · Jul 6, 2004

4.10's w/manual = 150 mph at 5000 rpms. I've hit 5200 rpm twice. That's 158.086 with my 285/40/17 rear tires.

03gtmustang · Jul 6, 2004

Is your car a 5 speed or auto?

StngStr · Jul 6, 2004

5 speed

mods are:

4.10's
K&N
o/r X
magnapacks
shifter
timing adjuster
pulleys

NewStangNewbee · Jul 6, 2004

What about auto and what kinda gas mileage do you get with an auto?

Modular2v · Jul 6, 2004

i bet a stang would be a sight to see in italy!!!

smokin'Red35th · Jul 6, 2004

Modular2v said:
i bet a stang would be a sight to see in italy!!!

Yea, I cant F'ckn wait!

BAFMustangGT · Jul 6, 2004

^^^ You should get the smoked headlights...
(Random Opinion)

Joel's98GT · Jul 6, 2004

your theoretical top speed at 6000 is around 166mph in 5th. and you don't have enough HP to make it there.

for cruising purposes i took these pics with my 4.1's
http://www.mustangmods.com/data/141/hpim0025.jpg
http://www.mustangmods.com/data/141/hpim0026.jpg
http://www.mustangmods.com/data/141/hpim0027.jpg
http://www.mustangmods.com/data/141/hpim0028.jpg

40th GT · Jul 6, 2004

Check your engine

NewStangNewbee · Jul 6, 2004

that damn engine light mine has been on for a couple months now lol

Green Flea · Jul 6, 2004

Joel's98GT said:
your theoretical top speed at 6000 is around 166mph in 5th. and you don't have enough HP to make it there.

for cruising purposes i took these pics with my 4.1's
http://www.mustangmods.com/data/141/hpim0025.jpg
http://www.mustangmods.com/data/141/hpim0026.jpg
http://www.mustangmods.com/data/141/hpim0027.jpg
http://www.mustangmods.com/data/141/hpim0028.jpg

I don't have 4:10's but Just by looking at that last picture (80 mph at 3,200rpm), It doesn't seem like theres any way you are going to get to 150 with just 3,000 rpm left to go. I'd say around 125 top speed plus or minus a few mph , but hey im just guessing.

smokin'Red35th · Jul 6, 2004

hey thanks. i think i'll wait to see what the driving is like there before i put the 4.10s in.

Joel's98GT · Jul 6, 2004

40th GT said:
Check your engine

egr delete and a bad mil, when something goes wrong with my car, i don't need an idiot light to tell me it's happening. it's been on for a year and a half.

Green Flea said:
I don't have 4:10's but Just by looking at that last picture (80 mph at 3,200rpm), It doesn't seem like theres any way you are going to get to 150 with just 3,000 rpm left to go. I'd say around 125 top speed plus or minus a few mph , but hey im just guessing.

brush up on your math junior.
http://www.corral.net/tech/

my 4th gear wraps to 110mph, how far more will a .68 overdrive gear go beyond that?

110mph @ 6000 RPM in 4th (1:1 ratio) = (?)mph @ 6000 in 5th (.68:1 ratio)
since 6000rpm is on both sides of the = sign we can cancel them out.

110 x 1 = .68 x (mph)
anything multiplied by 1 is always it's self, so we can take that from the equation.

110 = .68 x (mph)
and to solve, get the variable alone by dividing .68 from both sides.

110 / .68 = 161.7mph

my tires are 225/50/16 slightly smaller than stock and the 6000rpm speed isn't dead nuts 110 could be between 109-111, in any case the math is correct.

StngStr · Jul 6, 2004

Green Flea said:
I don't have 4:10's but Just by looking at that last picture (80 mph at 3,200rpm), It doesn't seem like theres any way you are going to get to 150 with just 3,000 rpm left to go. I'd say around 125 top speed plus or minus a few mph , but hey im just guessing.

You guess wrong young grasshopper.

http://www.tchracing.com/tech/gearc...givenval=5500&givenvaltype=RPM&selectedgear=5

RedBullitt · Jul 7, 2004

If i have an auto gt and i get the 4.10s put in, will my rpms on the highway be different from yours since you have a 5 spd? Just curious.

StngStr · Jul 7, 2004

RedBullitt said:
If i have an auto gt and i get the 4.10s put in, will my rpms on the highway be different from yours since you have a 5 spd? Just curious.

Yes.

RedBullitt · Jul 7, 2004

How far off from that will they be? should they be higher or lower?

kboy262 · Jul 7, 2004

Your rpms in a auto will higher do to the overdrive gear ratio being a tad taller. Something around .72 or so while the 5spd is .68 (T45) or .62 (T3650)

Whats your Top speed with 4.10s?

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