240Z TwinTurbo

iTrader: (25)

I was able to dyno the new setup and wanted to share the results. Here is the general information regarding the setup. Also, find below the post to my build thread:
https://www.evolutionm.net/forums/ev...xperiment.html

Engine
Curt Brown 10:1 2.0L
GSC S2s
Curt Brown ported head
Haltech Platinum Pro PnP
PTCS D200 Dash Logger
ACT 6-puck sprung with lightweight flywheel
Curt Brown Extreme Port intake with 70mm TB
1000cc Injectors
Squash Performance Double Pumper w/ Twin Walbro 400s
Custom SS hardlines


Turbo
Garrett V-band TwinScroll 1.01 a/r turbine housing
Garrett GTX3576r
Self fabricated custom top mount twinscroll setup
self fabricated 3.5" 321ss exhaust
Single Tial MV-R 44mm Wastegate
Tial QR 50mm BOV
Garrett 24.0" x 12.0" x 3.5" core (MPFAB tanks)

A few notes before I post the results. Boost response was slow compared to what I typically see on the street as previously shown in the following post:
https://www.evolutionm.net/forums/10804462-post4.html
The dyno is either loading the car differently or I am having an issue with the wastegate controller. With that said, 29psi was acheived at 5000rpm vs 4400rpm that was done on the street. I will do some logs on the street to see what I get and report back.

Boost is 33psi tapered to 31 psi and runs where done on 93octane pump gas with AFRs conservative in the 11.2:1 - 11.4:1 range.

Overall I am very happy with the results and the car definitely pulls harder on the topend with the new setup as evident by the graph. The next step is to address the spool issue and I plan to install the GSC R2s this weekend and stick the car back on the dyno shortly after. Next will be GTX SHOWDOWN Part II: GTX3576r vs. GTX3582r.

The first chart is the outcome from today's dyno pulls and the second chart compares the new setup vs old setup at relatively same boost.

https://web1.eng.famu.fsu.edu/~jthag...Dyno/Dyno1.jpg
https://web1.eng.famu.fsu.edu/~jthag...Dyno/Dyno2.jpg

Grimgrak

iTrader: (3)

Did you have some issue with the old setup? Looks pretty bumpy

JohnBradley

iTrader: (30)

Nice to see some numbers on a dyno I can relate too. I am especially looking forward to the next installment

240Z TwinTurbo

iTrader: (25)

Aaron, thanks for your support and for the R2 cams, retainers and seats

AreSTG

iTrader: (4)

As always, thanks for sharing your extensive results.

Dragracer187

iTrader: (1)

I thought R2 were stroker cams, is a S2 or S3 not better for a 2.0?

TheBoz

iTrader: (9)

Do you have a boost plot. It would be nice to see how the spool up is compared to other setups.

240Z TwinTurbo

iTrader: (25)

I made 28.8psi @ 5038rpm, which is about 600rpm later than what I originally saw when the setup was first running. I removed the exhaust manifold this evening because I thought I was hearing an exhaust leak. What I found is the divider for the wastegate tube was cracked on the outside as well as the inside. I will weld tomorrow with Hastelloy W and believe it will resolve the spool issue.

Below is the boost response for the old short runner setup vs the new setup when it was first running. I have also posted pictures of the weld cracks.

240Z TwinTurbo

iTrader: (25)

It is worse than I thought upon cutting open the manifold. When I sandwiched the 321ss plate between the tubes and welded from the outside, it appears I did not get weld on the divider plate and it curled from the heat since it wasn't constrained. I will weld in a fresh 321ss divider plate before capping the tube to ensure the edges are constrained, but if this breaks again I will run two wastegates.

Grimgrak

iTrader: (3)

If only someone made a cast wg divider hehe.

03whitegsr

iTrader: (8)

Hrm...

I wonder how similar the Garret divided collector outlet is to a Tial 60mm gate...

GrandMasterKhan

iTrader: (1)

ouch

wickedep

thank you for sharing info. read your other showdown threads too !!

240Z TwinTurbo

iTrader: (25)

I went back to the short runner twinscroll manifold, but upgraded the turbo to a GTX3582r. I need to get to the dyno again and report the results. It should be in the 525hp range, but with quicker spool.

sssr20det510

Did u see improvements going to the r2 cams?