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| Correct pinion angle https://www.slantsix.org/forum/viewtopic.php?t=37614 |
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| Author: | Rick Covalt [ Thu Oct 22, 2009 7:53 pm ] |
| Post subject: | Correct pinion angle |
Is there a way to set the pinion angle without the Transmission and driveline not in the car? I am going to mount my narrowed 8 3/4 rear this weekend and would like to tack the spring perches in place, but the engine and transmission are not in the car and won't be for a while. Can I set the angle in relationship to the rocker panel or some other landmark? Or do I have to wait until everything else is in place. I see conflicting measurements on the correct angle and how to measure it. Any help would be appreciated. This car is a 65 Valiant race car, with 4-speed transmission. Rick |
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| Author: | SlantSixDan [ Thu Oct 22, 2009 9:19 pm ] |
| Post subject: | Re: Correct pinion angle |
Quote: Can I set the angle in relationship to the rocker panel or some other landmark?
No. You have to wait til the engine, trans, and driveline are installed.Quote: I see conflicting measurements on the correct angle and how to measure it.
The FSM contains a good procedure.
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| Author: | 66aCUDA [ Fri Oct 23, 2009 7:15 am ] |
| Post subject: | |
Rick I feel for you I once tried it with the engine and trans "just sitting in there" but not bolted tight. I was OFF by a mile. Frank |
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| Author: | Rick Covalt [ Fri Oct 23, 2009 2:26 pm ] |
| Post subject: | Thanks |
Not big deal. I'll bolt it in without welding the perches on (or maybe one small tack) and then I will be able to set it on the ground and move it around. I'm seeing pinion angles of between 4 & 8 or more. Is one end of the spectrum better fopr a race car setup than the other? Sorry Dan I don't have a FSM. That will be on my wish list for Christmas.  Thanks, Rick |
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| Author: | 66aCUDA [ Sat Oct 24, 2009 7:34 am ] |
| Post subject: | |
Rick I just think that the angle needs to be correct for your setup more than what angle your running. IMHO Frank |
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| Author: | slantzilla [ Sat Oct 24, 2009 3:22 pm ] |
| Post subject: | |
8* down was usually reserved for a really fast leaf spring 4 speed car. Most milder setups will live long and happy with 2-3* down. My Valiant was happy with 0*. 
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| Author: | bigslant6fan [ Sun Oct 25, 2009 6:36 pm ] |
| Post subject: | - |
I agree with slantzilla,4-8 degrees is for full race cars,anything more than 2-3 degrees will cause the driveshaft to hum on the street. |
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| Author: | Rick Covalt [ Tue Oct 27, 2009 1:32 pm ] |
| Post subject: | Thanks |
It looks like I'll shoot for 2-3 degrees down. I just didn't know if a 4-speed and slicks would change the angle needed. Thanks for the info, Rick |
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