Driveshaft limits? Realistically...

[Craig cull]

Hi everyone,
Been a while since I've posted on here as Ive nearly completed my S3 CDL forged GTX3076r build.
I'm yet to post a full thread but thought I'd wait until I have some figures to back it up.

So as above really guys, what can the shafts take realistically?
There's been no expense spared so far but as far as the gearbox and shafts are concerned, minus an APR/southbend stage 3 endurance clutch with SMF and a neuspeed short shift, its standard.

Any help/advise would be great.
Thanks in advance


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[mec]

i wouldn't worry about it. the driveshaft is pretty sturdy, and a gtx3076 isn't going to blow it up.

[Craig cull]

i wouldn't worry about it. the driveshaft is pretty sturdy, and a gtx3076 isn't going to blow it up.

Thanks for the reply @mec
By drive shafts I actually mean each individual shaft. I know you guys have a different name for them lol.
More concerned about the 6000 rpm launch control that I'll be using allongside it.
What's your views on that?


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[mec]

Thanks for the reply @mec
By drive shafts I actually mean each individual shaft. I know you guys have a different name for them lol.
More concerned about the 6000 rpm launch control that I'll be using allongside it.
What's your views on that?


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Hm not sure I follow, do you mean the axles?

I've only heard of one guy snapping them, and he was on an extremely lowered suspension, which was placing lots of stress on the axle joints.

It's all in how you launch though. You can get a good launch without destroying axles that's for sure.

You may also be able to grab some axles from an 01e like an s4, I'm not sure if they bolt up but if they do they will absolutely handle whatever you've got


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[LINDW4LL]

Many B5 S4 guys have snapped axles while launching hard, but it almost always happened at the drag strip due to the extra grip of the prepped track surface.

I have not heard of any issues with axles breaking on the B7 (A4/S4 or RS4) and would not be concerned.

[Craig cull]

Hm not sure I follow, do you mean the axles?

I've only heard of one guy snapping them, and he was on an extremely lowered suspension, which was placing lots of stress on the axle joints.

It's all in how you launch though. You can get a good launch without destroying axles that's for sure.

You may also be able to grab some axles from an 01e like an s4, I'm not sure if they bolt up but if they do they will absolutely handle whatever you've got


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That's the one lol, axles.

I'm on Eibach pro street coilovers and Eibach anti roll bars. It's lowered but not on its arse.

So a v8 b7 S4 shafts will do?
Iam abit heavy on the launch, like I just drop the clutch and hold on.




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[Craig cull]

Plenty of B5 S4 guys have snapped axles while launching hard, usually happens at the track though.

I have not heard of any issues with axles breaking on the B7 (A4/S4 or RS4)

That's very good to know but I've had some seriously bad luck with this build, if its going to happen to anyone, it's gonna be me


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[derrek]

I snapped two axles launching my car. I think @mec was talking about me but not sure. Anyway my ride hight didn't have anything to do with the axle snapping.

[Craig cull]

I snapped two axles launching my car. I think @mec was talking about me but not sure. Anyway my ride hight didn't have anything to do with the axle snapping.

Ok, so I'm guessing your running some nice torque then? I was going to limit the torque to get less lag for the 1/4 mile.
What did you replace them with?


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[derrek]

Ok, so I'm guessing your running some nice torque then? I was going to limit the torque to get less lag for the 1/4 mile.
What did you replace them with?


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I say worry about it when it's a problem


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[Craig cull]

I say worry about it when it's a problem


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I'd like to think like that, but I've got an important drag race where I hope to make a big impression and set a top 1/4 mile time/record for the A4 B7 in the UK.
I don't want it to shit its self In front of everyone lol!


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[derrek]

I'd like to think like that, but I've got an important drag race where I hope to make a big impression and set a top 1/4 mile time/record for the A4 B7 in the UK.
I don't want it to shit its self In front of everyone lol!


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Well the only solution I found was to have "the driveshaft shop" make custom axles for $500 a piece so about 2k for all four.


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[Craig cull]

Well the only solution I found was to have "the driveshaft shop" make custom axles for $500 a piece so about 2k for all four.


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Ok so I need a custom job ideally then for it to last. That will do mate, cheers for your input :)


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[derrek]

That's only if you have a problem. Mec never had a problem or jhm.


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[Firefox250]

Craig have you ever been to a drag race track? If yes the odds of you burning out your clutch is more likely.

[Jake@JHM]

No problems with the drive shafts!

[drumnjuny]

[derrek]

I'd like to think like that, but I've got an important drag race where I hope to make a big impression and set a top 1/4 mile time/record for the A4 B7 in the UK.
I don't want it to shit its self In front of everyone lol!


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It's not too bad lol. You should really go and see if you even have problems before dumping money on new axles IMO.




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[mec]

Welp thats embarassing lol. it happens though. I think i broke down like 3 times at the track. twice because my rear coolant hose kept blowing off, and another few times from hose couplers exploding

[FraggyA4]

I like that the person filming you continued to film until they parked you in the back lol

[mec]

I like that the person filming you continued to film until they parked you in the back lol

dude you moved to thief river? why would you do that. i heard thiefs live there.


Thieves? theifs....hmm

[FraggyA4]

dude you moved to thief river? why would you do that. i heard thiefs live there.


Thieves? theifs....hmm

Yeah moved in January and there are thieves here. A girl stole my bike no joke. I'm pretty hurt by it.

[Jake@JHM]

Yeah moved in January and there are thieves here. A girl stole my bike no joke. I'm pretty hurt by it.

big girl? little girl?

[FraggyA4]

big girl? little girl?

Crazy white trash crack head girl. maybe like 24 130lbs

[Craig cull]

Craig have you ever been to a drag race track? If yes the odds of you burning out your clutch is more likely.

Hi, yes I currently hold the k04 1/4 mile record of 13.4 @ 101 mph, it handled a 5500rpm launch quite well
360bhp @ 370lbft
I'm more concerned about the 500bhp and 500lbft lol


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[Craig cull]

It's not too bad lol. You should really go and see if you even have problems before dumping money on new axles IMO.




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I do agree, I just don't want to do a public show lol!
It was fine on the previous build but we've pumped the power up considerably.
I'd rather not spend any more money if I can get away with it


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[Firefox250]

Hi, yes I currently hold the k04 1/4 mile record of 13.4 @ 101 mph, it handled a 5500rpm launch quite well
360bhp @ 370lbft
I'm more concerned about the 500bhp and 500lbft lol


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When your car is done we should have another betting poll for the dyno run.

[Craig cull]

When your car is done we should have another betting poll for the dyno run.

I'm game


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[mec]

Crazy white trash crack head girl. maybe like 24 130lbs

was she hot enough that you would be willing to stick your dick in the behind the knee area?

[Craig cull]

When your car is done we should have another betting poll for the dyno run.

Don't forget we get 99ron out of the pump over here. @26 psi we're seeing 450bhp with no meth and 110bar requested
From the Hpfp.
It's hardly even trying at the moment.



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[Firefox250]

Nice! So 99ron is equal to our U.S. 95octance, and you get that from the pump, lucky! My car can only run on 91octane (95ron). What's your uncorrected wheel torque/horsepower?

[Craig cull]

Nice! So 99ron is equal to our U.S. 95octance, and you get that from the pump, lucky! My car can only run on 91octane (95ron). What's your uncorrected wheel torque/horsepower?

No 95ron is our standard unleaded, 99ron is shell v power which is 99 octane.
I will have dyno results in a few weeks when the final map is done. We've worked out bhp by maf readings and AFR. It's only an estimate in all honesty.


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[derrek]

No 95ron is our standard unleaded, 99ron is shell v power which is 99 octane.
I will have dyno results in a few weeks when the final map is done. We've worked out bhp by maf readings and AFR. It's only an estimate in all honesty.


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No dyno? Bummer I wanted to know whp.

What was your k04 setup?


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[Craig cull]

No dyno? Bummer I wanted to know whp.

What was your k04 setup?


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It's going back for another map after ive tested it to find any issues if any, then I will have the dyno results.

The k04 hybrid was 370bhp and 370lbft


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[derrek]

It's going back for another map after ive tested it to find any issues if any, then I will have the dyno results.

The k04 hybrid was 370bhp and 370lbft


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are those based off maf and afr?

[Craig cull]

are those based off maf and afr?

Yes and absolutely obliterating an Audi S3 8p that was running them figures.
We compared them on several runs and found the B7 was pulling it apart.


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[Craig cull]

Unfortunately I started the big turbo build before I had chance to dyno it. The power wasn't enough and I knew it so I just left it there.


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[Craig cull]

Here's the build video, few pics and vids of the strip.

https://youtu.be/JNeD-k41Hhg


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[derrek]

Here's the build video, few pics and vids of the strip.

https://youtu.be/JNeD-k41Hhg


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Fixed

[derrek]

Unfortunately I started the big turbo build before I had chance to dyno it. The power wasn't enough and I knew it so I just left it there.


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who makes the turbo?