How Much Does A Drift Shaft Shift/move?

[theDETlife]

Hi guys,

I'm just wondering how much would a standard r32 two piece drive shaft (3 uni joints, 1 hanger bearing) move or shift from its normal position when not rotating compare to when under load from the engine?
I have replanted the original 20de motor to a rb25det neo, obviously an increase in power... so would this cause the drive shaft to twist or move more than usual under hard acceleration?

The reason I'm asking this question is because I'm in new zealand and to meet the legal requirements for the engine replant i have to install 2 drive shaft hoops. And it looks like the shaft is connecting the bolts inside the hoop causing a clucking sound under heavy acceleration. the shaft clears the head of the bolts by about 7mm-10mm. could the d shaft move that much?

cheers, will post photo Asap.

[GTSBoy]

Shouldn't move much, but it really depends on how close the bolts on those loops are. Without photos it's a little hard to say.

So, first question. R32 RB20DE right? What's the chances that the tailshaft on those is any different at all to the one on the turbos? I would say unlikely. On that basis, I would argue against the need for tailshaft loops. Bloody tailshaft loops on a 2 piece tailshaft seems unnecessary anyway. What sort of drugs are your roadworthy people on anyway?

Second question. So you've put a 25Neo onto the front of an RB20DE gearbox? If so, expect it not to last too long. If you instead have transplanted the big turbo gearbox with the engine, then you would have had to modify the tailshaft anyway, to put the front half of an R33 or R34 turbo tailshaft onto it. If that happened, then why didn't you get the centrebearing and support checked out at the same time?

Just FYI, the only place where the 2 piece shaft can deflect at all is at the centre support. If it's shot, all you need to do is replace it.