240Z TwinTurbo

iTrader: (25)

UPDATE:

I was able to finish the dual wastegate setup today and should have it up an running tomorrow. The turbo pictured is the new GTX3582r.

Grimgrak

iTrader: (3)

Guess you already sold the 3576 and never really optimized it with a working TS?

mitsubeastlee

iTrader: (3)

Wait so do the 35mm WG dump into each other? I don't see where they dump? Or are they dumping into the downpipe?

Nvm I see it now. They dump into downpipe

Faisalm

That engine bay is going to get HOT under boost lol

240Z TwinTurbo

iTrader: (25)

UPDATE:

I finished the car and it is driving as of this afternoon. I usually take the car through at least 3 heat/cool cycles to make sure the coolant is completely burped before getting on it. I hope to start tuning sometime tomorrow evening and will report results when I have something to share. For now here are the final pics of the new twin wastegate setup with the GTX3582r.

Faisalm

Nice heat shield. Did you fab that up as well?

240Z TwinTurbo

iTrader: (25)

I do all of my own fabrication at my house. Yes, the heat shield was $10 worth of thin sheet metal from Lowes and about 2hrs of my time. It helps for force the heat through the hood vent.

IzzyRS

iTrader: (8)

Wow, that engine bay means BUSINESS! I love it, very impressive. Are you only using one vent for crankcase pressure?

mitsubeastlee

iTrader: (3)

i read your whole gtr thread and it was very interesting. keep up the good work! cant wait for the results on this setup

240Z TwinTurbo

iTrader: (25)

I was finally able to retune for the larger turbo and compare spool vs the previous single wastegate setup. I had to add ~5% more fuel with the GTX3582r vs the previous GTX3576r @ 32psi to maintain 11.5 AFR. As far as spool, the picture below is comparing spool for the following:

Before: GTX3576r / Single Tial 44mm / Dyno run 3rd gear / 23.7psi @ 5000rpm
After: GTX3582r / Dual Tial 38mm / Street run 3rd gear / 22.2psi @ 5000rpm

Based on the small change in spool I feel confident the single Tial 44mm wastegate was creating lag issues with the previous setup. Also, looking at the valve I could see that it was making contact with the divider as it was shinny in that area.

spdracerut

iTrader: (2)

It's really moving with the GTX3582R... looks like it goes from 5k-8krpm about a quarter second faster than with the 3576. Granted, you were running ~4psi more peak boost. Regardless, under 3 seconds to go from 5k-8krpm in 3rd gear is moving pretty damn fast.

240Z TwinTurbo

iTrader: (25)

It is actually the other way around with the GTX3576r going from 5K-8k rpm more quickly. However, it was not only ~4psi more boost, but I also ran more timing because it was 110 leaded fuel.

Pump gas for pump gas the new turbo definitely pulls harder on the top even in the summer heat so I feel this setup should net ~545hp@wheels on 93 octane. I will stick it on the dyno in a few weeks for the results.

riceball777

iTrader: (33)

I can't wait for the results !

LookThatsMe

iTrader: (40)

I'm running a t3 top mount kit, 6466 4bolt discharge, using a full rad just had to get one with a offseted (evo4,5,6) neck.

LookThatsMe

iTrader: (40)

That's a dope looking kit.