Quote:
Originally Posted by shadow85
520tq is about 700nm.
If I build motor, and can hit close to 700nm, then I will be on the limit of the VR30 trans and need to build it. By the time I do all that, the costs would be close to doing a ZF870/75 swap I rekon which can handle 700/750nm torque, but also most likely be faster than the VR30 trans. So I think I would go with the ZF8 then the VR30
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If it’s the same price or close to it, go for the ZF.
However you said above 15k for ZF and 7k for built trans. A built VR30 trans is the same price as a VQ trans. Only add in a little more to shorten your driveshaft for the swap.
The stock VR30 can handle and hold 520tq/705nm just fine, many people have been daily driving 540tq/730nm no problem. It comes down to how it’s driven, and how long it’ll hold up. Say it lasts 35-40k miles then you swap in a new stock trans for about $1200-1500.
I got a FI flexplate, and sent my valve body and torque converter to IPT to upgrade those for about $1,500. And a 19’ 30k mile VR30 trans w transfer case (awd g37) for $1500. This combo should be very good at 520tq/705nm.
Then if my clutch packs ever start to go out down the road I’ll buy the upgrade clutch packs drop my trans off at a reputable local shop and get the clutch packs installed. If the shop isn’t pulling/installing the trans you can probably get clutch packs + install for under 2k usd. Or I could just swap another stock VR trans and transfer over the built
VB and TC.