Make sure you find a good shop to install and tune for you too. Otherwise you'll be stuck like me hoping the shop will schedule an F'N dyno for you so you don't have to drive your car half throttle for a whole month.
Yea I'm pissed to say the least.

 

I thought the stock power was good but when I added the twins(APS) it was insane. Zivman is right though because much over 400hp is quite insane in these cars. The torque is magnificent. I didn't think so at first because I gotten used to the power but then I drove my other car for like six months and when I got back in the Z it actually scared me a little bit. You also have to be paying attention when you're driving. I tried to flip a quick u-turn and be gone but it ended up being a drift turn instead. Luckily, in my heavily patrolled area, there weren't any cops around.

 

400+/- whp will feel about the same in an aps st as it will in an aps tt right? i mean i know there is more lag at the lower end with the st, but once i get going 400 whp will feel great either way right?

 

APS TT (Feel the difference)...

 

The will feel basically the same. I have driven both cars with fresh out of box setups and both are very comparable. The ST will have a bit more lag in comparison to the TT setup, but beyond 4000 rpms, you won't really tell the difference

 

I have the stock Greddy at 5.5 and it's all most people will need in the car. It really is holy crap faster.

Also I'd like to add a few things.

BOv/BPV are not 100% required and in good turbos like the Greddy and APS won't really be an issue. I was told that in Japan that they rarely use them. Could be a story but my source is pretty solid.

Also Ball Bearing Turbos are not really the superior design. If they aren't a floating design they cause vibration and problems in life. Also if you've ever experienced a ball bearing fail in something now imagine it in a spooling turbo...not pretty.


But to answer the OG question. The fastest car I was in before riding in a GReddy TTZ was an E55 (479hp 5xx TQ) when I went for a ride in the Z it had a similar feeling of power.