first time out, not so good...
#1
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
first time out, not so good...
New look, new things to fix. First shot made an easy half track run, second pass broke the top bar on the torque arm, which threw the rear end up and broke the drive shaft. At least it wasn't at a race? lol
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
Re: first time out, not so good...
It was the Spohn standard duty TA. never really payed attention to the pinion angle until this winter we noticed the rear end was angled up slightly so checked the pinion angle and it was +4, readjusted to -1.5 and it snapped on the first good hit? Bought it back in 04 and has been 1.37 best 60' with it. Broke on the top tube right where the flat gusset connects before the hyme joint.
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Car: 91 firebird
Engine: sb2.2 headed sbnos
Transmission: tsi glide
Axle/Gears: 4.30
Re: first time out, not so good...
Car looks great sorry for the bad luck. What unit are you going to replace with?
#7
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
Re: first time out, not so good...
I measured the angle of the driveshaft to the pinion with the angle finder. Going with the pro series torque arm this time. I'll take some pics tonight or tomorrow. That arm had a ton of passes on it. We race alot, usually from March to November sometimes 2 to 3 races a month.
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#8
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
Re: first time out, not so good...
Maybe it was just a coincidence that it broke, but I wouldn't think changing the angle to whats recommended would cause it to break like that? I was hoping it would take strain off the drive line
#9
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Re: first time out, not so good...
shouldnt have broken with the pinion angle change, for sure. mustv'e just been its time to go. i asked how you did the measurement because everyone i talk to does it the wrong way. they just stick the angle finder on the rearend and point it 2 degrees toward the ground and call it a day. so i ask them what their pinion angle would be if they jacked the front of the car 4 feet off the ground. lol
#10
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Re: first time out, not so good...
madman just goes off pinion angle and not based off driveshaft or anything else, just that car is on level surface. His stuff seems to fly as well.
I've always done crank angle off balancer, driveshaft and pinion to make sure all three are close for a reading.
I've always done crank angle off balancer, driveshaft and pinion to make sure all three are close for a reading.
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
Re: first time out, not so good...
I'm just glad I didn't just go race and not make a few test runs. Here's where it broke.
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Car: 91' Z28, 92' Z28
Engine: 383, L98 stock
Transmission: Built 700R4, Stock 700R4
Axle/Gears: 12 Bolt 3.73, 10 Bolt 3.23
Re: first time out, not so good...
Man the car looks great! Sorry to hear you broke some parts though.
#13
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Re: first time out, not so good...
Have you shown that to Steve Spohn to see what he thinks about it? Or do you think it was just fatigued from years of launches? Doesn't look like there can be much done to it to reinforce that area. I'll keep a close eye on mine for cracks or bending in that area. Thanks for the pic.
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Car: 1987 Camaro
Engine: 406
Transmission: Powerglide
Axle/Gears: Moser 31 spline / 4.86
Re: first time out, not so good...
Have you shown that to Steve Spohn to see what he thinks about it? Or do you think it was just fatigued from years of launches? Doesn't look like there can be much done to it to reinforce that area. I'll keep a close eye on mine for cracks or bending in that area. Thanks for the pic.
#15
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Re: first time out, not so good...
i can't think of any reason to do it his way (the wrong way).
a friend of mine bought one of his first torque arms he brought to market. it had no slider joint on the front so it bound up. he wound up fixing it himself. i believe the arms he sells now have a slider in them.
Last edited by DIGGLER; 03-13-2012 at 04:30 PM.
#16
Re: first time out, not so good...
i don't get how you can't take the angle of the output shaft on the transmission into acct for the # to mean anything?
#17
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Re: first time out, not so good...
in theory, you should try to make the front u joint angle the same as the rear u joint angle to avoid vibrations. it can take alot of time putting everything in the right spot once you get into moving the engine/trans around as well as the rearend.
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Car: 87 Firebird Formula
Engine: AFR headed SBC
Transmission: TKO 600
Axle/Gears: 9" Moser with 4.11's
Re: first time out, not so good...
I have read when people take the angle from the engine and compare it to the diff that they use the vertical part of the balancer and diff. Can u do the engine crankshaft method and do it on a horizontal plane so you don't have to remove the driveshaft to put the angle finder on the rear diff yoke? Xpndbl where do u take your angles from on the engine and rear diff? Thanks
#19
Re: first time out, not so good...
i use the output shaft on the transmission, throw an angle finder on the bitch and subtract 90 degrees, then throw it on the rear diff yoke .
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