4.10 Gears or 3.73
- Thread starter 04Sonic
- Start date
At 80mph the rpm are between 2700-2800. Not bad. The ride is great. It will be a little louder but it depends on what exhaust setup you have.04Sonic said:
GodStang said:
If you're having that much of a problem, I'd check the suspension and make sure something isn't wrong. Postban's car with the whipple, 4.10s, and F1s didn't have problems like that. I have buddy with an older Cobra with probably 320 - 360 rwhp and 4.10s that spins going into every gear and goes sideways in every gear because his suspension is so jacked up.
Every Cobra is different. There was just a debate on a local forum about drag radials getting rid of wheel hop completly.
If I powershift into 2nd I get wheel hope on the street. If I don't powershift then I don't get wheel hop. I have MM full length sub frames and BFG 315 DR's. I just put in H&R Race springs. We'll see how that helps.
I talked to a guy that had 4:10's and he said it made no difference at the track. He was on streets tires.
If I powershift into 2nd I get wheel hope on the street. If I don't powershift then I don't get wheel hop. I have MM full length sub frames and BFG 315 DR's. I just put in H&R Race springs. We'll see how that helps.
I talked to a guy that had 4:10's and he said it made no difference at the track. He was on streets tires.
04Sonic said:
I can't speak for the 4.10 gears but when I had the 3.90's in mine at 2,000 rpms cruising I was at 60 mph. With the stock 3.55's @ 2,000 rpms I was cruising at 70. I still like my higher speed highway driving so the 3.90's came out and the 3.73's went in. Now at 2,000 rpms I'm at 68 mph.
I would not make a change from the 3.55 to the 3.73 - personally I didn't notice much of a difference. I only put them in because I was taking the 3.90's out & I had already given the 3.55's away. With the 3.90's there was a big change, but just as you add more HP & TQ a street tire will not handle it.
silvrbullit04 said:
What's your Hp and TQ number?
Spade
well guys , i just finished the install on the 4.10 gears .it took 5 hours start to finish. this is the best mod i ever done to the cobra.. the car should of came with these installed from the factory..... the gears makes the car feel light when leaving a light. it accelerates alot better too. i would recomend these to anyone.......
My curret numbers are 470hp and 474tq. I cant say enough about the 4.10's. I to was a little hesitant about installing them in the car. Everyone said that it would be to much gear. I'm glad i did it!:rockon: :burnout:Spade said:
here is my two cents about gears from reading the forums for the last few years and from talking to different owners of cobras.
the people who like them usually have stock or slightly above stock power or are track cars.
people who hate them and generally do not need them are high hp daily drivers and even some high hp track cars.
4.10 is way too much gear for a 600~700rwhp street car, you really dont need it and it doesnt help, it makes launching way harder and your traction will absolutely suck.
if you dont have good traction now on good tires the gears will make it worse.
for a track car it can help, you get slicks, tall tires, figure out what gear and tire you need so you dont have to do the extra shift right before the end of the 1/4 and you can improve your time.
but being that even my car has traction problems with 600rwhp and good tires, more gear is a waste of time for me.(daily driver) and probably for many of you.
so anyway take all that with a grain of salt. but I have never heard of a 600~700+ street car thats was happy with more gear.
the people who like them usually have stock or slightly above stock power or are track cars.
people who hate them and generally do not need them are high hp daily drivers and even some high hp track cars.
4.10 is way too much gear for a 600~700rwhp street car, you really dont need it and it doesnt help, it makes launching way harder and your traction will absolutely suck.
if you dont have good traction now on good tires the gears will make it worse.
for a track car it can help, you get slicks, tall tires, figure out what gear and tire you need so you dont have to do the extra shift right before the end of the 1/4 and you can improve your time.
but being that even my car has traction problems with 600rwhp and good tires, more gear is a waste of time for me.(daily driver) and probably for many of you.
so anyway take all that with a grain of salt. but I have never heard of a 600~700+ street car thats was happy with more gear.
Its a little loud, but its because of my exhaust. I have an o/r x with flowmaster catback. Its tolerable for me because i dont do that much highway driving. And when i do, i usually have the windows down!:rockon:04Sonic said:
Can anyone shed any light on this?
I just had the car retuned with SCT and took out the old diablo chip. I didnt look at the chip to see what was done to it. Well, I was pulled over for doing 42 in a 35. I argued with the cop and told him I wasnt going that fast. So a week later, I had a friend in a rental minivan with only 500 miles on it clock my speed as he drove beside me. Sure enough my speedo is about 6 mph off. My car cuises ar 2350-2400 rmps n 6th gear at 70 mph. Does anyone know what size gears my car may have had installed before I bought it? Any help would be GREATLY apreciated!
I just had the car retuned with SCT and took out the old diablo chip. I didnt look at the chip to see what was done to it. Well, I was pulled over for doing 42 in a 35. I argued with the cop and told him I wasnt going that fast. So a week later, I had a friend in a rental minivan with only 500 miles on it clock my speed as he drove beside me. Sure enough my speedo is about 6 mph off. My car cuises ar 2350-2400 rmps n 6th gear at 70 mph. Does anyone know what size gears my car may have had installed before I bought it? Any help would be GREATLY apreciated!
What would need to be recalibrated abut it if it were stock gears?
It all depends on your suspension and tires. I'm running a solid axle with 4.10s, torque arm and panhard bar and even with stiff roadrace springs it makes good traction. On street tires when they are new it holds first gear WOT once you get it rolling.
I need to back off to 3.73s now though because I am going to 5th in the 1/4. I don't have the option of running a 28" DR because I'm on 17s due to my Baer brakes and I run the 26" M/T ET Street radials (M&H makes a 28" DR for 17" wheels but they are crap from what I hear).
I need to back off to 3.73s now though because I am going to 5th in the 1/4. I don't have the option of running a 28" DR because I'm on 17s due to my Baer brakes and I run the 26" M/T ET Street radials (M&H makes a 28" DR for 17" wheels but they are crap from what I hear).
I never understood the logic of going with 4.10's and then changing out to a taller tire? That's just reducing the net gear ratio back to "X" amount. Why not just keep the 26" tires and go with the 3.73/3.90's which is what a 4.10 w/ a 28" tire approximately comes out to......
IronTerp said:
For drag racing the 28" tire has more sidewall than the 26" tire and gives better 60ft's. You are able to launch harder & hook better with the taller tire.
I want to see more pics of your car! The wheels look hot!BuffDigits said:
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