Just wondering if this is possible.

What made me wonder is this dyno of a big turbo Audi TT

Given that the TT engine is aproximatly half that of the VQ35 (1,8 liters) and has the same compression of 8,5:1 as many build engines, would it be possible to have a twin turbo using the GT28-71's used in the Audi with the same power and torque curves (only with numbers almost doubled )?

 

NVM..misread your post.

BTW the numbers in that dyno graph are flywheel not wheel.

 

The numbers on the Audi show the turbo STARTing to spool at 3500. You do not achieve max boost until 4500+ RPM. This is something that most would consider as a laggy setup, however experienced tuners would see the usable powerband and minimal TQ loss at higher RPMs.

The GT2871R is an awesome turbo for 1.8-2.2L 4-cyl and IMO is a great stage for the TT 3.5L.

 

thats actually a pretty laggy setup. Thats abouthow my friends RX7 boosts up...2500 it starts and by 4000 hes at full. He doesn't redline till 10k though :-D

 

Yes, numbers are flywheel and added they count for 383X2=760 hp, that is why I am talking for 700whp.

The turbos are productive at 2500rpm (almost 400lb-ft of flywheel torque for the equivalent 350Z) and that is what I meant spooling, there is plenty of power at 2500rpm, but naturally (for such a big hp number) full boost is achieved at 4500rpm.

If you take a closer look, the torque of the big turbo at low rpm is almost equivalent to the small stock turbo!!! And you still get the ausome top end!
THAT is impressive IMHO.