Eos said:
He wants to pay for the gears, If he doesnt want to buy T lock instead of gears, I will let him pay for the gears and I'll pay for the T lock, But please that wasn't the question. I just need to convince him that it doesn't go the way he thinks.
Let him pay for the gears?
Me thinks you thinks yourself a Princess.
And has it occured to you that it doesn't go the way you think either?
So, if it comes down to an all or nothing , if you were my kid, guess what you would be getting.?
One of the beauties of the Ford removable carrier, IE the 8 and 9", is the chunk doesn't have to be removed to replace the pinion seal. Only the pinion needs removed. I've seen people replace the seal without even pulling the pinion but thats shoddy work.
Then you have the drive line vibration that was so bad it took out the rear U-Joint and later the seal. Far as I know you havent truly addressed this. That would be the first thing I worked on.
Do you know what makes a one wheeled wonder? Axle lift. The drive shaft applies force to the pinion which rotates the axle about the pinion that plants the left tire and lifts the right tire. All other things being equal a numerically lower gear rotates the axle about the pinion to a greater degree and a numerically higher gear to a lesser degree.
Now, with the same gear set and a tire that hooks better the axle will rotate about the pinion to a greater degree because the shaft can apply more force before breakout.
The net effect of going to wider tires with the same gears will probably (because nothings certine) be a lower ET, but not as low an ET as an axle that's lifting less and thus doing a better plant on the right tire.
Your Father is correct.
I'm with Dano on this:
Naturally its soooo much easier to just toss in a track-lok than to ... learn to dial in and launch a dead legger ... I submit people can't tune because they don't really know how things work, and thus can't see how one issue plays against the other.
Let's look at this tire issue. Megan is going to a 15x8 rim, which I think is a waste of money unless first going to a 5 bolt rear, and going to a 5 bolt rear is useless unless ditching that damned MII housing and rubber perch crap, but I digress.
I can't see the point of going to a 15" rim and keeping tires of the dsame diameter, the II has never looked right with those dinkey damned 195/70-13 tires.
So lets assume ( I know, Ass-U-Me ) Megans going to fill out her wheel wells, a larger diameter tire will yield greater traction. This isn't theory, this happens though it may take a Pro driver to see it.
Static and dynamic friction is dependent on only two factors: Force and coefficent of friction. Contact area isn't a factor when in theory.
BUT: Road/ track imperfections matter less with a larger diameter tire thus greater (forward) traction. Let's move to an extreme example to illustrate this. You have a 2" diameter tire moving over a 1" square obstacle. That tire is going to have to stop forward motion and start climbing before it can once again move forward. Now take a 26" diameter tire. Forward motion never stops, even if it's a steel wheel.
This is the same concept that allows larger tires to roll easier than tires of lesser diameter.
I admit that tire compound, rim size and tread width and aspect ratio, construction of carcass, all play a part.
Worry about getting basic concepts down first.