I have a 4g civic hatch with FI b16 and GSR axles. What are the limits of these axles HP/torque wise?

 

i have HEARD around 300hp depending on if you are using slicks/drag radials/or street tires..

with street tires, you would roast em' soo bad i think a stock axle could handle 1000 hp

hope i am not too far off

 

First you must understand the difference between torque and horsepower. Torque is the actual force which can twist the axle and propell you, horsepower is the total possible energy that is given per unit time which sustains you at a given moment. Horsepower is more or less the energy of inertia, power of the movement in the strength of torque moving the crank at high rpm. Since most imports use high rpm (revolutions per minute) which results in high HP it does not necessarily increase torque, the axle only need to be well balanced and be able to handle the torque coming out of your gearbox. Torque at your axle is engine torque multiplied by your gearbox. Lower gears, 1st 2nd and 3rd will produce a multiplying factor to your axle. Overdrive or direct drive is a 1:0 or less. Therefore, find out exactly what the torque specs are on the axle, find out the torque your engin produces, and find out how much your first gear multiplies the torque, since first gear is your largest multiplier, and whuala.

 

It's around 200-250 ft/lbs of torque.

Axles don't care about HP, they care about Torque.

 

So if you ran an LSD, could you double that figure? (200-250 ftlbs)

 

Hey ayacht, thanks for the nice reply. But what you say last:

"Therefore, find out exactly what the torque specs are on the axle, find out the torque your engin
produces, and find out how much your first gear multiplies the torque, since first gear is your largest multiplier, and whuala."

is exactly what I am asking. The torque specs of the axles? Yes, I did mess up and put down HP, but I also put down Tq. You all know what the question is asking anyway. Well, what had happened to me is I stripped out the spline on the shaft itself which attaches to the inner part of the CV joint. This happened when shifting into 2nd while maintaining full boost. Right now I am only running .7 bar and I am planning on 1 bar just as soon as I get everything worked out at .75 And this is one thing I need to know If I am gonna have to buy some driveshaft shop expensive *** axles. Anyway, with the torqueless B16 I didnt think I would have too much of a problem with the axles.
So, what are the Tq specs on these axles?

 

I now have a new question. Anybody have a drivers side axle to sell me? Complete and rebuilt. Repair shop just called back and said that I cracked to outer walls and something else as well, and stripped out the splines. Anyone have one to sell me? Its for b16/w Gsr midshaft into a 4g civic hatch drivers side.

 

What would make you think that an LSD would allow you to run more Torque?

 

I got a used drivers side axle. Don't know if the boot is ripped though, I'd have to go dig it outta the garage.......

 

Axles don't typically break in the middle of a gear run, so torque doesn't really matter either to that extent. It's the shock that happens when they're suddenly loaded with force when the tranny tries to turn them and the wheels resist that turning. It's just like walking. You only weigh ~200 lbs on average, but with each step your knees take many times that force.

 

I dunno, I'm asking questions.

I thought the LSD split up the power so it went to both wheels, instead of just one wheel.

 

I just went and picked up the unrepairable axle. Take a look


Dont worry about finding me a new axle. I ordered some that will tkae the abuse....

 

You're correct, I did not answer your original question. I was merely adding 0.02 to the first replier about HP. I hope it wasn't taken wrong. Goodluck with the new axles.

 

There isn't any exact answer. The crappier your tire traction and clutch grip, the more torque you can "get away with".

A street setup with 200 ft. lbs. probably won't break an axle, but put slicks on it, add an LSD and a really strong clutch and they're guaranteed to have problems at some point with stock axles.

 

This is correct, but remember FINAL GEAR RATIO, so you multiply the max torque times the first gear ratio, times the final gear ratio.
Am i right?

 

It depends if you want to know the torque at your wheel, hub, or axle. You are correct if you desire to know the final torque to the wheel, but I believe the question is "how much can the axle handle?." Therefore, the final drive gear is not calculated in.