how much torque do 4.10s add??

[96Kobrakid]

answers???

 

[2slo95fiveoh]

you should be fine. Basically any speed you would be at with stock gears (most likely 3.27 for a cobra) will have a higher rpm
with 4.10s. cruising rpm for my 5.0 with 4.10s at 70mph is about 2,600. a lower gear ratio will increase your acceleration. You shouldn't
be "hurt" from 20-120. a higher cruising rpm as well as less of a top speed is all you'll discover.

 

[19mustang95]

top speed will actually go up with going from stock gears to 4.10s..

 

[Schiffy]

so wat would be sum good torque adding mods and/or best mods n general without blowing all ur money?

Selling your modular, and buying a pushrod, there's one way to add some beasty torque.

 

[ryclef331]

top speed will actually go up with going from stock gears to 4.10s..

correct, if you run the race all the way into 5th gear.

I run a 4.30 gear behind my 331 stroker and I go through the traps in the 1/4 mile at 126-127 and I'm at 6,500- 6,600 rpms on a 28 inch tall tire. I am about at the limit of these gears. However, everything around me NOW is 1/8th mile tracks so I am going to just up the nitrous and run balls out in the 1/8th!

 

[Willis_98GT]

top speed will actually go up with going from stock gears to 4.10s..

correct, if you run the race all the way into 5th gear.

I run a 4.30 gear behind my 331 stroker and I go through the traps in the 1/4 mile at 126-127 and I'm at 6,500- 6,600 rpms on a 28 inch tall tire. I am about at the limit of these gears. However, everything around me NOW is 1/8th mile tracks so I am going to just up the nitrous and run balls out in the 1/8th!

:boink: :boink: :boink: :boink: :boink:

 

[Hellion94]

top speed will actually go up with going from stock gears to 4.10s..

This is true to a point.

Let's say that there are 2 cars that make the same power. Let's assume that the power they make is enough to "top out" a set of 2.73 gears, meaning it can overcome the drag and everything associated with speed and get to the redline in 5th gear with 2.73's. Let's say the other car has 4.10's

The car with the 2.73's will have significantly higher top speed than the car with the 4.10's, because the gear will run out far before the 2.73's do.

However, if the hypothetical cars make less power, the 4.10's will be able to run the car to redline, and that may produce a higher top speed because it can utalize the entire RPM range in 5th gear.

All the gear ratios refer to is the amount of rotation of the axle in comparison to the driveshaft. A set of 4.10 gears will turn the driveshaft 4.10 times for every 1 rotation of the tire, whereas a set of 2.73 gears will only tun it 2.73 times. Let's say that the driveshaft RPM is 5,000 with 2.73 gears, the tire will be turning 1,831.5 times in a minute, whereas with 4.10's the tire will turn 1,219.5 times. If we factor that out for Tire circumference, that means for a 100" circumference tire, the 2.73 gears will travel 15,262.5 feet per minute at a driveshaft speed of 5,000RPM. the 4.10's will only travel 10,162.5 feet, or almost a mile less in a minute, which means at 5,000 RPM driveshaft speed, there could be almost a 60mph difference between the two.

It should be stated that a 100" circumference tire is HUGE, as a 28" tall tire has a circumference of about 88", but it was just used to try and simplify the math, and should have no bearing on the distance covered.

 

[realitygt]

perfect explanation of why the 2.73's will have a higher top speed but almost everything in there point to going with a higher gear (lower numerically) throughout all the rpm range, as you will be covering more distance and tire will be spinning faster, I really didn't understand this concept until a little while ago, when I was thinking real hard while waiting lol

You would want a higher gear to go thru your gears faster, so that instead of making the gears longer(with the 2.73's) and taking along time to get up to 5,000rpms and the 15,262.5 feet per minute, you could instead reach the desired 5,000rpms in less time and already be in the next gear. In other words lets say it takes u 15 seconds to get from idle to 5000rpms and 15,262.5 ft with 2.73's. With 4.10's it may take 10 seconds to get to idle to 5,000 rpms and 10,162.5 ft where you would shift. that would mean you would have an extra 5 seconds in the next gear to make up for the loss of the tire spinning slower compared to the 2.73's. with that other 5 seconds in the next gear you will probably exceed the distance covered by the 2.73's in the 1st gear.

I confused my self for a minute and had to type the whole thing out to straighten it out. maybe someone else isn't getting it, and this will help

lol, craig everything you say I always understand better after I hear u say it than I did before. ur explanations really help alot haha :thumb:


btw we have the same first name

 

[19mustang95]

top speed will actually go up with going from stock gears to 4.10s..

This is true to a point.

mathematically speaking, yes 2.73s offer a higher speed. but realistically, none of the cars or owners on this forum will mae the type of power to use the smaller gear to there benefit to overcome the drag and such.

 

[Hellion94]

top speed will actually go up with going from stock gears to 4.10s..

This is true to a point.

mathematically speaking, yes 2.73s offer a higher speed. but realistically, none of the cars or owners on this forum will mae the type of power to use the smaller gear to there benefit to overcome the drag and such.

That may be the case, and as I stated, in that case, the shorter gears would help.

 

[96Kobrakid]

ok i think i got it all lol so basically if im racing a car identical to me but i have 4.10s n hes got 3.73s n we race 20-120 my top end performance isnt effected at all with the higher gear correct?

 

[duh09]

You'll be fine.


Our cars can't reach speeds fast enough (without being wildly modifided) for the 2.73s to have that much more of an advantage over 4.10s.

 

[96Kobrakid]

thanks. hey last question....how much is my odometer off since puttin the new gears n and i havent got the chip to change my speedometer yet..?

 

[duh09]

I dont remember how far off it make sit. My car has 4.10s and I know that atround 2000-2100 is 55... and thats all i need to know.

 

[96Kobrakid]

o no i know that i didnt mean the speedometer.. i mean the odometer (ur mileage gauge) i heard it is also thrown off as well..
is this true? if so by how much?

 

[Venom351R]

o no i know that i didnt mean the speedometer.. i mean the odometer (ur mileage gauge) i heard it is also thrown off as well..
is this true? if so by how much?

You can correct it with a speedo gear or a speed cal. It effects your MPH and your mileage. By how much depends on which gears you put in and how much difference it is from what you had in before.

 

[96Kobrakid]

how many tooth would a 96 cobra be?

 

[idro]

I really havent read the whole thread so sorry if this is already posted.

If you're contemplating on getting a rearend gear for your car its really one of those feel good mods. You will definately feel it moreso than any mod you can do other than a power adder.

As far as all the BS goes you will hear about losing top speed. YOU WILL! Your theoretical top speed with 3:27's is something like over 200mph correct me if im wrong, and with 4:10's its like 160? or 170? There was a calculator on the corral at one time i dunno if its still there.

As far as gas mileage is concerned, go 70 instead of 80.

And yea, you have a 4v in that 96. Go 4:10 if you want to be a puss, go 4:30 if you want extreme. :coolsmiley:

 

[justinschmidt1]

Stop being a little bitch and get some 4.30s

End thread.

 

[realitygt]

has anyone came up with a rpm for 4.10's or 3.73's at 70mph? ... i'm still wondering.