|
![]() |
#1 |
Junior Member
Join Date: Jan 2010
Posts: 83
Likes: 0
Liked 12 Times in 6 Posts
|
![]()
What are optimum angles for this type of suspsension system. It seems I cannot get the angle of the pinion and the crank to be parallel. The engine/trans is pointing down by 5 degrees, when viewing car from the side it slopes toward the rear. The pinion is currently sloping down toward the ground as well. I have adjustable top trailing arms with heim joints each end and can adjust the angle of the pinion, which also affects driveshaft angle. I can also shim trans mount some as well until header clearance becomes an issue. Should I be more concerned with trying to minimize operating angles of the u joints at each end rather than relationship of the pinion angle to the crank angle.
Any input is much appreciated. Thanks, Scott |
![]() |
![]() |
![]() |
#2 |
Senior Member
Join Date: Sep 2007
Location: Henderson, NV
Posts: 583
Likes: 8
Liked 54 Times in 27 Posts
|
![]()
The nose of the diff will rotate upward on takeoff, so it should point down a little at rest.
|
![]() |
![]() |
![]() |
#3 | |
Member
Join Date: Sep 2006
Location: Genoa, Illinois
Posts: 489
Likes: 9
Liked 6 Times in 4 Posts
|
![]() Quote:
This may explain the "pinion angle" concept better..... http://www.rosslertrans.com/pinion%20angle.htm Last edited by rallye bob; 08-18-2013 at 08:10 PM. |
|
![]() |
![]() |
![]() |
#4 |
VIP Member
Join Date: Nov 2007
Location: New Jersey
Posts: 2,628
Likes: 160
Liked 759 Times in 379 Posts
|
![]()
Scott, I thought I answered all your questions/explained how to check/set in our PM's last week.
![]() |
![]() |
![]() |
![]() |
#5 |
Junior Member
Join Date: Jan 2010
Posts: 83
Likes: 0
Liked 12 Times in 6 Posts
|
![]()
Ed You did.
I just like to get other's opinions on the subject. Never hurts to have agreement. I have everything all set up and will try it in a week or two to see if the changes help. Any opinions on anti roll bar settings? No preload or pre load passenger side and if so do I make the links longer or shorter? Thanks, Scott |
![]() |
![]() |
![]() |
#6 |
Member
Join Date: Aug 2003
Location: Atlanta
Posts: 476
Likes: 20
Liked 70 Times in 22 Posts
|
![]()
One thing to remember as you look at the Rossler chart is that having zero zero is better than +two-two. Don't have the formula in front of me but I think a 3 degree ujoint misalignment eats 1% horsepower so if you are down 3 on the trans and up 3 on the rear to make them parallel then it is 1 or 2% loss. Don't remember if the formula is for 1 joint or a pair. Work to get 0-0 knowing sometimes you just cant.
__________________
Stewart Way 2424 SS |
![]() |
![]() |
![]() |
#7 |
VIP Member
Join Date: Nov 2007
Location: New Jersey
Posts: 2,628
Likes: 160
Liked 759 Times in 379 Posts
|
![]() |
![]() |
![]() |
![]() |
#8 |
VIP Member
Join Date: Jul 2002
Location: Michigan
Posts: 1,227
Likes: 133
Liked 530 Times in 108 Posts
|
![]()
[QUOTE=1320racer;395446]ok, just make sure that these others offering opinion have GM A body cars that leave on par with this one, launching off the footbrake and nearly 3900 lbs.
![]() The all knowing, 1320 Racer, speaks again. Get over yourself. That car is not a Stocker, not a Super Stocker. Anyone (with enough money) can stuff a high HP BB Chevy in a Chevelle, Firebird, etc., and go fast.
__________________
Jim Kaekel 3836 STK |
![]() |
![]() |
![]() |
#9 | |
Senior Member
Join Date: Jun 2005
Location: Nashville N.C.
Posts: 506
Likes: 4
Liked 101 Times in 27 Posts
|
![]()
[quote=Jim Kaekel;395533]
Quote:
__________________
NHRA AND IHRA STOCK ELIMINATOR 2772 |
|
![]() |
![]() |
![]() |
#10 |
VIP Member
Join Date: Nov 2007
Location: New Jersey
Posts: 2,628
Likes: 160
Liked 759 Times in 379 Posts
|
![]()
it ain't about "go fast", it's about getting these cars to work and neither would you know anything about!
![]() Meanwhile, show us your car no mind another GM A body that has gone 1.28 60 foot with a bolt on suspenion, using all and nothing but the factory mounting points, nothing welded and no anti roll bar, launching off the footbrake and weighing 3900 lbs. ![]() The Proof is in the Performance! Last edited by 1320racer; 08-20-2013 at 10:48 AM. |
![]() |
![]() |
![]() |
|
|