IRS Pinion Angle?

[Specialk]

Ok gearheads, I got a question for you. I am finding all sorts of conflicting information concerning the pinion angle VS the engine angle. Does anybody know what the optimum pinion angle is for a IRS car? What about the engine angle? Assume a Ford engine(If that matters?) and a Cobra for the application.

Thanks

[Tom Wells]

Hi kris,

Did you look here yet?

Pinion angle discussion on Club Cobra

If you do a search here, you'll find even more

Regards,

Tom

[Morris]

Kris

Here's something from Denny's Driveshaft service...

I've got some drawings .... just have to find them...

http://www.dennysdriveshaft.com/

How much driveline angle is right for my application?
Thats a loaded question. The best answer is....the least amount of driveline or u-joint angle is the best amount of angle. Try to achieve the least amount of u-joint angle but don't make it less than 1 degree. A little known fact about u-joints is that they require about 1 degree of operating angle to get the needle bearings rotating. If they do not rotate they will fail. Too much angle will also cause them to fail. The type of rear suspension also plays a big part in setting the angles as well as the engine/transmission angle. Leaf spring cars have a need for more downward pinion angle due to spring wrap-up while coil spring cars control the situation better. Hard acceleration as in the case of a drag race car requires a different setting than a street driven car. Traction bars, ladder bars, 4 links, independent rears all have special needs and requirements.

Hope this helps....
Morris

[Morris]

Kris

Here's the document that will help the most...

http://www.drivetrain.com/driveline_angle_problem.html

Morris

[ToyCollector]

Morris,

What is in your head would make a great book for folks like me, and Kris, and TURK, and LNP, and SFCJ, and about a zillion other gearheads...something like the magic tricks magicians only share with each other book. Great stuff.

[Morris]

TC...

I'm just lucky to be able to participate in the ability to break and destroy things..... it's called experience.... then I know what not to do.....

Like trying to knock 2 seconds of your lap time at RR and then the ride...... and then the smile on your face when you come in.... damn what a great time....

Nothing like it.... Huh.... >????

Morris

And yes this board is a good place to pass it down to others...

[Morris]

BTW

Those other guy's would probably throw me out of the room after 10 minutes....

[Specialk]

Thanks Morris. I like "the least amount of driveline or u-joint angle is the best amount of angle". I'll keep that in mind!

[hal698]

Pinion angle is the same as the engine, whether they are parallel to each other or not.