Axles, how likely am I to break them?
 

I am stepping up (down?) to a 15" setup in search of a better 60ft since all we have is a 1/8th strip and that is where I personally need to make up some time. The track surface isn't the greatest but the first 100ft is decent when prepped.

On ethanol I'm in the 700-800whp/600-650wtq range by my best estimations. No functioning dyno here yet and street pulls for virtual dyno are out of the question since the last time I lost traction around 4500rpm in 4th gear, I do not have brown enough pant's to attempt that again.

At what point do the cv joint's/axle give up?

With those tires, you will need axles for sure. You will need the 1400whp axles. Not the 1200whp axles. They are not cheap either. $3200 to $3500 or so. Make sure you have a diff brace too.
If you don't and break the diff cover it will get expensive quick. It will break the driveshaft and may fubar the tailshaft of your transmission.

You might want to look at upgrading your driveshaft also.

I have the Z1 cover currently and I was looking into doing the Pathfinder diff cover since it has 2 mounting points and I get to weld.

$3500 for axles is not happening. If that is what needs to be done then I just won't race it anymore.

MA-Motorsports has done the 300zx diff cover with two mounting points. At least do the Bell diff brace and modify it. The 1200whp axles are around $2500 or so. It get's expensive quick on the drag strip. We haven't even talked about the transmission. Input shaft and 3rd gear is a problem.

That's why you don't see me at the drag strip. Pour money in the front while parts come flying out the back. No thanks.

It’s all we have here so it’s kinda the only place I have to fully appreciate the landmissle. I’m on a 75sq mile rock with a max speed limit of 50mph, no circuit track and until recently no drag strip.

I’m not trying to be cheap but there’s a time when it’s smarter to draw a line in the sand than reach the water not knowing how to swim.

I’ve raised the car up and brought it to the alignment shop with 400lbs of **** in the trunk to get it to full squat to get as close to 0 camber with everything loaded up and reduce the camber gain when launching.

If I can crack a 1.5 60ft without grenading the CV’s I will be just fine with that. I’ve seen what happens when you have a very good clutch time diff and one axle breaks mid track. 99% of the time you’ll break them at the starting line but I’m not about to put my car in a wall because all the power goes to one wheel in a hurry. At launch a driver with enough mechanical empathy and a decent hand brake can preload the suspension to reduce the shock (dunno if I fit that description ��)

I mean this in the most respectful way possible but everyone in this thread so far is just speculating, educated speculation but speculation none the less.

If I find out the hard way I will update with my findings

It's not speculation. I have seen them all break as I have stated above. So why did you even ask if you don't want to believe what I have told you. It get's ugly quick.

I've launched my 370Z Nismo with nothing breaking at 600WTQ, all you need is soft tires, preload the drivetrain, and a good diff cover (Stock w/ bushings) or Gktech with dual studs

Swapping to the Z1 Diff Cover, it broke as soon as I launched it on the street, broke my driveshaft, dented my exhaust, and dented my whole subframe. **** companies with shitty products.

With all due respect, no one should comment unless they've actually been to a drag strip while boosted...

You’ve gone through the ringer with your experiences that’s for sure and you’ve been forthcoming and sharing with your successes and “failures” so understand I appreciate your input.

The axles you’ve seen break, are you at liberty to share power level and tire setup?

He broke them on his 15in tire setup. He broke several of them. He even broke the 1200whp ones.

http://www.the370z.com/forced-induct...t-build-8.html

Nathan that goes to SOHO broke his SOHO diff cover, driveshaft, and trashed the tail shaft of his transmission. He did have the DSS 1400whp axles.

LOL, I don't have to do it. I can sit back and watch the carnage with my Popcorn.

You can break a diff cover on the street NA. SS_Firehawk did.

As far as input shafts. Well that list is getting long. Let's see. Mr. Squeeze did it on the streets. SOHO, a 900+whp car that MA-Motorsports built broke 2 input shafts, and a couple of more that I don't remember the details of. I am not sure how many transmission SOHO has broken trying to get them to live at the drag strip. Input shaft, 3rd gears out the wazo, and first gear.