Sorry about starting another thread. What degree angle is acceptable for the LS2 in my chevelle? Both my small block and big block before sat fairly angled.

Thanks

 

3-5*, double check the pinion angle..

 

More than you ever wanted to know about driveshafts...
http://www.4crawler.com/4x4/CheapTri...line-101.shtml

 

If you plan to lower the car, it is better to have the engine as level as possible. So transmission up as high as it will go. Here is an excellent write up:

http://www.chevelles.com/forums/showthread.php?t=213271

Andrew

 

the shaft of the trans is in direct line as the Crank shaft... so..both engine and trans will be sitting around 3*....

so. if you can't get under the car to measure the output shaft as it is sitting are ride height.. just measure the cranks, pulley or the engine's lifter valley rails ..
When I measured the output shaft of the trans, crank/pulley and lifter valley rail. they were all the same readings.. just 90* on some of them.. that make it handle to measure.

 

I beleive what has been said is right, between 3-5* for the engine / trans, and the same for the rear end, you want no more than a total of 10* if i remember correctly

 

Whatever angle you run, the front and rear should be the same: engine tilts "downhill" 3degs; pinion at differential should tilt "uphill" so that the angles cancel out. If you draw a simple diagram of the driveshaft CL at dead horizontal, the CL of the engine is at 3degs, and the diff pinion is also at 3degs with the engine and diff lines exactly parallel.

BTW, ujoint manufacturers recommend a small angle like 3degs to work the needle bearings and keep the grease spread around. Less angle and the needles don't roll enough, more angle and the dynamic effects of the driveshaft speeding up/down on every revolution because of the joint angle put too much load on the bearings.

 

At 0 pinion angle you are right but depending on rear end setups you may have -3 degrees on the motor and tranny and 0 or even negative degrees on the rear end. You want them both matching under acceleration which the rear end will twist up.

 

equal and opposite for each component angle, no more than 1.5* between the two for high speed operation...pinion angle will change on accel which can factored into static setup numbers, but the effect on pinion angle will depend on the rear suspension type..i.e. 4 link, leafspring, etc....