NEW syty issue

[BMFB]

So...I think I might have stumbled across a new issue with the syty setup. I could be wrong and Im kinda looking for advice here because I KNOW im not the fastest guy out there.

Backstory. 1991 s10 4x4 blazer. converted to awd, weighs 3550 with me in it, plaus 150 for the pass. I am running 4 28x9x15 drag slicks.

Last night I finally got the truck to spool the 76mm off the line and did a 10psi launch. I believe I cut somewhere in the 1.40's onthe street. felt great, I think ( I dont remember). I tried it again and launched at 12 psi and spun all 4 tires about 30 feet.

I noticed the truck was driving funny. Toe out, top of tire pulled in. Started looking at it today.

Heres kinda what the pass. side looks like

And here is what the drivers side looks like...

So, again, not the quickest thing out there...but...should I just get a replacement and try again? I may try to reinforce it..

 

[jeepruby04]

Re: NEW syty issue

That's a good one:tup: Is there any chance it was weakened from rust? Maybe arms from SM might be stronger. On a side note, it also looks like the CV shaft is hitting the coilover on the drivers side, you might have an issue with the lower as well. :2cents:

 

[qbnkiller]

Re: NEW syty issue

Yeah... I think that alarm was either fatigued ahead of time or bent already. I don't think that would happen from your build.

Replace with good arms and try again

 

[BMFB]

Re: NEW syty issue

replacing now. Special thanks to ken and tony for the help. So far it doesn't look like it was fatigued or rusted out...it could have been bent before hand.

Ill post some pics of it repaired. It should be done tonight, and then hopefully I can get it to milan or lapeer next weekend to see what 'my build' is capable of in a straight line :tup:

 

[Don W.]

Re: NEW syty issue

Ya, torque wouldn't have done that. Torque is handled by the dif mounts. All the arms do is hold the truck up, they DO absorb braking loads though. Have you had to brake reeely hard lately? :rotf:

 

[BMFB]

Re: NEW syty issue

jokes aside braking would have ripped them in the other direction. If you want to try to explain how the diff is dealing with the wheels pulling the truck forward through the CV axles I'd love to hear that. Tires are turning, pulling forward, according to you that force is making it from the wheels, to the cv axle and then to the diff, and the mounts for the diff are what are pulling the frame forward? I would have to argue that those forward forces would go through the spindle and to the upper and lower control arms.

EDIT: quick thought, in your world the control arms are dealing with braking forces but not acceleration forces. Think about that Don

 

[RealFastV6]

Re: NEW syty issue

I'll be the first to say it - VC locked up?

 

[Don W.]

Re: NEW syty issue

Well ya know what, I think we're both right. The torque IS handled by the dif. as I said. (Think IRS) The forward motion of the truck in reaction to the wheels turning is handled by the a-arms as you say. So my bad on that one.

Back to the bent arm. The way I see the pic the arm is bent forward so, using your point it could have been bent by the spindle pulling (pushing?) the truck forward (probably the more likely scenario actually) but braking would have pushed that direction also.


Thanks for straightening me out.


Cheers.