First of all I've got a full build thread here for anyone interested: https://my350z.com/forum/media-share...urbo-350z.html , but just thought I'd post dyno results and rough specs in this section as its more relevant.

This is my first attempt at making anything like this - I've never made exhaust manifolds or intercooler end tanks before etc, and certainly never designed a twin turbo setup from the ground up myself. So there's probably plenty of room for improvement, but it made more power than I was expecting so I'm pretty happy. Some specs below and bear in mind my goal was to make this as responsive as possible, and still have somewhere between 400 and 500 whp.

• VQ35DE built with CP rods and pistons (8.5:1 CR), stiffer valve springs, bearings etc
• 2 x Garret GT2554R turbos
• DW350iL fuel pump with DW250iL pump feeding swirl pot
• DW 600cc injectors
• AAM fuel return kit (although I ended up replacing the 4AN return line with 6AN line I made myself)
• Tial MVS 38mm external wastegates
• Tial Q BOV
• Exhaust manifold, downpipes, intercooler piping and intercooler end tanks all made by me

Here's what it looks like after 4 months of me making stuff:






and here's the dyno graph with flywheel torque and wheel horsepower (ignore the dotted lines from a previous run):



So yeah peak figures were 547 hp at the wheels (around 600 bhp at flywheel I guess) and 527 lb ft of torque at the flywheel, running 1.2 bar of boost.

Not bad considering like I said I wasn't going for top end power and just wanted it to be really responsive. Obviously it starts to drop off at the top end as you'd expect from turbos that were chosen for fast spool up, but still making 450 whp at the 7200 redline even after its dropped off.

Here's a comparison of torque from my car when it was NA (the green dotted line at the bottom), then the twin turbo setup at 30% throttle (light blue line), 50%, 75%, and then the dotted blue line at the top is 100% throttle:



and the same for horsepower at the wheels:



Pretty mad how much torque it makes at such low RPMs, like 350 lb ft at 2500 rpm and then nearly 500 lb ft at 3500 rpm. Should be fun to drive

Here's a video I made from the dyno runs too:

 

Looks good!

 

dope