anyone see this happen before

[tghoward1376]

has anyone seen this happen before? this happened at the track friday night.  shot 175 to my 73 c-10 on 28 by 9 et drags and it hooked hard and pulled a 1.54 60 foot then broke u joint  guessing the spring is what caused the joint to break 

[blue beast]

wow are u running ladder bars,looks like a bad case of axle wrap.must b a torqie engine

[Blazin]

Done that 4 wheeling before. I would agree axle wrap, and maybe some worn out spring eye bushings.

[tghoward1376]

no not running anything but the stock suspension  its a 30 over 350 3000 converter 12 bolt with 3.73, 488 488 lift 292 300 duration cam 441 heads, dome pistons about 11.5 or 12 to 1     and that happened after i shot 175 from home at dragstrip

[Irish_Alley]

Looks like someone needs traction bars

[SUX2BU99]

Some cal-trac bars might be a good thing, especially with that kind of that hook to get a 60 ft time like that and leaf springs. Not really surprising something broke there if everything isn't fairly new, fresh and heavy duty. The huge amount of torque that nitrous creates, coupled with slicks that hook up, can do freaky things. In another thread with a 600 HP SBC, a guy broke his transmission case!

[tghoward1376]

yeah luckly  only the u joint was hurt   saving up money for caltracs now  was gonna put the set up in a 80 capri i have but   think ill leave it in the truck   surprises the crap out of people at the line   and no one expected it to pull 1.5 and 1.6  60 ft times on completely stock suspension and narrow slicks  lol

[Captkaos]

We have Caltracs in the store for sale...
http://store.73-87chevytrucks.com/merchant2/merchant.mvc?Screen=CTGY&Store_Code=7&Category_Code=7387SUSP

[VileZambonie]

about 11.5 or 12 to 1

Why are you running such high CR with N2O?

I hope you used some seriously strong internals.

Show us a whole pic of the leaf springs on both sides. Is the shackle frozen?

[mike_hd1340]

Not only have I seen it i've done it.  Mostly has to do with axle wrap but your pinion angle plays a part in it also.  I've torn up about everything under my truck at one time or another.  Get you a set of Cal-Tracs and mono leaf springs. Be sure to clamp the springs in front and behind the axle.  Then work on your pinion angle. The only other advice I could give you is don't spray off the line I cut 1.5 60's all day long on motor wait till you get out a ways before you spray.

[Chevalade]

Who makes mono's for our trucks? And how much do they lower the rear?

[tghoward1376]

we were told it was 12 to 1    had our friend who owns a local engine shop figure it up today he says with the pistons and the big open chamber heads it is prob closer to 10 to 1    truck is a slug on motor    pulls 2.22 60 ft  and 9.4 in eighth   turn on gas and it would pull 1.54 60 and 7.6 in eighth     

[mike_hd1340]

Who makes mono's for our trucks? And how much do they lower the rear?

www.calvertracing.com

[Captkaos]

mike_hd1340 beat me to it, but Calvert makes Mono leafs also, we are a dealer for them to..

[Chevalade]

Well I am wondering how much they drop the rear (the mono's). Because I was wondering if a flip kit would be too much drop. It would decide which caltrac bars I get. Overall I want a 4/6 drop, and able to hook. If I have to run shackles/hangers and mono's thats fine. Just looking to buy the right parts the first time out.

Also I currently have the 8 leaf long rear springs. Do the monoleafs come in that length? Also what are the prices cap on a set of mono's for our trucks. It isn't on yer site.