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Author Topic:   pinion angle
volfan69
Member
posted January 05, 2004 10:23 PM
you want anywhere from 8-11 degrees of angel so shorten them up as much as it takes to get 8-11 degrees


waltonjr1
Member
posted January 06, 2004 02:00 PM
What is the best way to measure pinion angle. I know with an angle finder, but is the measurement in relivence with the ground or the driveshaft? Hope this makes sense.

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DEANJR#22


UFnARacing
Member
posted January 06, 2004 03:41 PM
Good point Walton. You want a 5 to 7 difference in angle of the pinion, as compared to the driveline. In other words, you want the pinion 5 to 7 "flatter" than the driveline. What I mean by flatter is you want it more towards horizontal than the driveline is. By the way, 5 to the eye is barely anything at all, so it will look like the pinion is real close to inline with the driveline.


waltonjr1
Member
posted January 06, 2004 05:44 PM
Thanks, in other words if the driveshaft is on a 5 degree angle your measurement on the pinion should read about 11 degrees. Is this correct, if so thanks for the help. This is what i thought but wasn't real sure.

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DEANJR#22


eaton89
Member
posted January 06, 2004 06:53 PM
Isnt that pinion angle down pinion. In otherwords the front of the pinion is pointing down towards the ground 8 to 11 degrees. Is this correct. I got a little confused there, not hard to do. Is this correct.


waltonjr1
Member
posted January 06, 2004 07:45 PM
It is down pinion but the ground has nothing to do with anything. Measure the angle of your drive shaft. Your pinion should be at 5-7 degrees more of an angle than your driveshaft, hope this helps.

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DEANJR#22

[This message has been edited by waltonjr1 (edited January 06, 2004).]

racer17j
Member
posted January 06, 2004 08:55 PM
take the drive shaft out and set the car to ride heights and unbolt your upper arms put the angle finder on your pinion .tilt the rear end down 8* put the top arms back down on the mounts mark the holes and redill them and then cut the excess arm off thats they way i was taught to do it


NJantz
Member
posted January 07, 2004 07:03 AM
thats great info! Only question is, it says 3 to 4 degrees for factory bushings. Is anybody running more than this if measured the same way.


dirtrace
unregistered
posted January 07, 2004 08:14 PM           
Ok, I was going to stay away from this one but I think its being way over complicated, and some what messed up in the explanations above.

I looked at the diagrams etc.

1. the numbers given there for pinion angle are very conservative.

2. the goal of pinion angle is to assure that the driveline and pinion never line up straight.

3. pinion angle, meaning more pointing down at the rearend will promote more traction, to a pt. 3 link race cars use it as a adjustment and it does work.

I allways just check it on the rearend. with leafs I go from 5-7 degrees.

When I ran a 3 link with a solid top I stayed at 3-5, and with a rubber bushing on top,back to 5-7.

If I had a metric I would remove the springs etc and jack the car around to simulate corner exit ride hts, and see where the pinion angle and while Im there rear steer goes.

racer17j
Member
posted January 09, 2004 08:15 AM
dirt hit on something there those specs are for drag racing. they are sitting still and have better surface to bite then we do when the track is like ice


volfan69
Member
posted January 09, 2004 09:29 PM
Thanks for all of the help. It's awesome to have a forum like this to share info. Best of luck to all in 2004


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