GM A Body Drive Line Angles
 

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

Re: GM A Body Drive Line Angles
 

The nose of the diff will rotate upward on takeoff, so it should point down a little at rest.

Re: GM A Body Drive Line Angles
 

That statement may be confusing to some... And not exactly true....
This may explain the "pinion angle" concept better..... http://www.rosslertrans.com/pinion%20angle.htm

Re: GM A Body Drive Line Angles
 

Scott, I thought I answered all your questions/explained how to check/set in our PM's last week. :confused:

Re: GM A Body Drive Line Angles
 

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

Re: GM A Body Drive Line Angles
 

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.

Re: GM A Body Drive Line Angles
 

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.;)

http://classracer.com/classforum/pic...pictureid=5257

Re: GM A Body Drive Line Angles
 

[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.

Re: GM A Body Drive Line Angles
 

[quote=Jim Kaekel;395533]You took the words out of my mouth.....well said.

Re: GM A Body Drive Line Angles
 

it ain't about "go fast", it's about getting these cars to work and neither would you know anything about!:p

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.:p

The Proof is in the Performance!

Re: GM A Body Drive Line Angles
 

Well it sounds like it was pretty damn simple.

Re: GM A Body Drive Line Angles
 

Brag some more. That's one thing you've proven that you can do well.

Re: GM A Body Drive Line Angles
 

Brag some more. That's something that you've actually proven to be good at.

Re: GM A Body Drive Line Angles
 

it ain't bragging if you can back it up and your reply is typical of those that can't achieve the same!:p

Meanwhile, the op PM me for help last week and again pm me moments ago. He knows who to ask advice of when the topic is the GM A body suspension and how to get these cars to work better than most. ;)

Matter of fact, a friend and accomplished Divison 1 stock and super stock racer who on occasion posts here just called me to ask the same for a Chevelle he's setting up for stock eliminator.

Re: GM A Body Drive Line Angles
 

[QUOTE=1320racer;395566]it ain't bragging if you can back it up and your reply is typical of those that can't achieve the same!:p

"It ain't bragging if you can back it up". I think I've seen high school kids with that saying on their T-shirt.

Re: GM A Body Drive Line Angles
 

Mr. Bigley may be a pain in the behind, nevertheless, the fact is that Alf Weibe's suspension system for GM A-Bodies does work and can make them hook even in a car wash.

Re: GM A Body Drive Line Angles
 

yes it does and there is no better bolt on suspension for these cars bar none but this thread ain't about Alf's suspension nor Mr. Bigley, it's about pinion angle, nothing more to which I informed the op how to correctly check it, calculate it and set it.

Re: GM A Body Drive Line Angles
 

Well Ed if you would like, can you copy and paste me the info please.
Ed does know these cars well.
Too bad his car never ran a high horsepower stocker motor n trans like a 396/375 or 427/425 too see it class race. It could've.
I was at Cecil this past weekend and saw Katie Sepaniks car movin nice like never before.
Square and quick launches.
Got that Velle down pat now like The White GS Lenny Williams

Re: GM A Body Drive Line Angles
 

Thanks for speaking ther truth chris. Too much time and money to race for peanuts, beg for contingency money and be treated like sh_t by the nhra for me to race stock/super stock though I did entertain for a while last year buying a copo camaro. Instead I'm using the coin to buy/build a top shelf dragster for my son to bracket race. Check your pm.

Re: GM A Body Drive Line Angles
 

Ed I think you my need head gear to race a Numedia..
They beat up the starter ..wtf

Re: GM A Body Drive Line Angles
 

James, not something to joke about and that's my only comment. This is a matter between Numidia Dragway and Mike.

Re: GM A Body Drive Line Angles
 

The only 3900 pound Chevelle that I know of that runs 1.28 60s is Joey's B/SA LS6 Chevelle. Again I will say how is it possible for this car to weigh 3900 pounds when I have the same all steel 68 that weighs 3720 with bolted in weight? This is the only full weight stock suspension Chevelle 1.2 60 your ever gonna see Ed, Ive been asking for years now to see your 1.2 60 foot from your 10 sec production block chevelle. The proofs in the time slip.

Re: GM A Body Drive Line Angles
 

I was wondering the same thing.Unless you HAVE to weigh 3900 pounds in a Chevelle to make your legal Stock or Super Stock class weight,why would the car be that heavy and why would you run it that heavy all of the time?

Re: GM A Body Drive Line Angles
 

Hell, I had to put weight into my 68 so I could run at the weight everybody else claimed. This Eds car gets heavier every time he brings it up, don't forget the negative 1500 feet air the car was regularly raced in.

Re: GM A Body Drive Line Angles
 

same old bullsh_t from you, you can't do it so no one can and that time slip means nothing as it relates to this thread or your latest failed attempt to debunk my former Chevelle's performance.

Post the full time slip with track info and date along with a photo of the car with the competition number on the time slip, on the car!!

AGAIN, when I sold my Chevelle that weighed 3880 lbs. going down the track with my cast iron headed 468 under the hood along with power steering and power brakes at the conclusion of the 2008 season, NO ONE that Alf was aware of running his suspension had 60 footed as quick as my car including Joe's former ride that weighed less and was sold to Adam Landolfi in 2007, maybe 2006.

Believe what you want, I've got the time slip, Alf has seen it, Herb Mccandless jr. witnessed the run at Piedmont Dragway on 11/24/07 and saw the incrementals.

Re: GM A Body Drive Line Angles
 

Ed, I think you know theres a list of full weight production oval port big blocks out of my shop that rape this red car of yours, just saying...

Re: GM A Body Drive Line Angles
 

I just want to see the time slip, should be simple to post it on up. Yes your car went some low 1.3s, but that not a big deal, and it sure doesn't weigh 3900 pounds. Come on Ed your not even turning the fan....

Re: GM A Body Drive Line Angles
 

3880 lbs. witnessed by many on the scales, get over it!

Meanwhile, 6 years after my Chevelle posted a 1.28 60 foot time and 5 years since I sold it, it's still the benchmark for you and many others!:p

Work harder and one day YOU might be able to duplicate it!:p

Re: GM A Body Drive Line Angles
 

I think you know who sets the bar.

Re: GM A Body Drive Line Angles
 

I've got no time to debate the same old sh_t about a car that I sold 5 years ago but for those that want to know, there's several threads here including this one...

http://classracer.com/classforum/showthread.php?t=40441

with more lies and failed atttempts by this poster.

BTW, my current car, has 60 footed 1.17 weighing 3144 lbs., n/a and launched off the footbrake, want to debate that too?:

Re: GM A Body Drive Line Angles
 

Ok bracket man your flying 1.17 @ 3100 with a 522 rod kicker, in negative 1500 feet air, nice work, like I said your flying......

Re: GM A Body Drive Line Angles
 

IT WOULD SHURE BE NICE IF YOU TWO HANDLED YOUR DIFFERENCES IN PRIVATE!! NOT ALL OF US WANT TO SEE THIS S**T ALL THE TIME!!

Mark, thats a nice time slip. But without showing the whole time slip and matching car with number, it's about useless. I might also add that you are about 25 mph off for a low 10 second run. 113 MPH can be handled by a good K/SA car!!

Ed, at least give him props for posting something. What have you posted besides words and pics of your old car? If you really want to shut him up, post the slip. Surely you know how, as you have no problem posting pictures of your car. Or does your knowledge stop at gradiose self portrayal? Come on Ed, the whole S/SS community is watching.

Re: GM A Body Drive Line Angles
 

" I might also add that you are about 25 mph off for a low 10 second run. 113 MPH can be handled by a good K/SA car!!"

1.28
10.04
112 MPH
What were you saying about a K/SA car? Must be way under.

Really, thats a correction right at the 60 foot mark, heres another on the rear wheels @ 3600 pound on a small tire, stock suspension pump gas oval port. Save your uneducated comments for Ed.