New Z & having fun so far

[TwinZurbo]

Did the thing. CAI, Exhaust, lower DP, tune.

I went with the AMS air intakes, AMS race lower downpipe, AWE touring exhaust and SOHO in Charlotte NC tuned the car.

Some interesting things I heard:
The low pressure fuel pump maxes out on these cars, upgrading it is a thing around the power I'm at.
The clutch won't last super long due to how fast the power comes on. The Nismo one solves this.
The heat exchanger from AMS is a super good idea since the engine will provide much less power if the intake air temp climbs too high (and they do.)

Observations post-tune:
I ran gave it full throttle through a couple gears (3rd-4th) on a sunny 55F day and traction wasn't an issue with stock tires.
On the 3rd pull I noticed the boost only hit 10psi. I'm attributing that to heat soak.
The stock tune seemed to have a few different throttle points.. 0-30%, 30%-60%, 60%-floor. There was a point in the 30-60% range where you got some boost.. like 7psi. I liked this for driving around real-world. Post-tune I don't have it.. it's 0-30 feels great, 30-60% throttle feels wrong after 3k RPMs. Boost reads -5psi. I'm an rank armature at tuning but I think it's targeting the wrong manifold pressure. SOHO knows what they're doing.. I'll have to ask.
WOT is nuts.. stupid amounts of smooth power.
Exhaust combo sounds fantastic. Jah_Happy's video in this thread does it justice.
It's overall a much better experience to drive.

Dyno shows bolt-ons with no tune and post-tune.

 

[trackratZ]

Did the thing. CAI, Exhaust, lower DP, tune.

I went with the AMS air intakes, AMS race lower downpipe, AWE touring exhaust and SOHO in Charlotte NC tuned the car.

Some interesting things I heard:
The low pressure fuel pump maxes out on these cars, upgrading it is a thing around the power I'm at.
The clutch won't last super long due to how fast the power comes on. The Nismo one solves this.
The heat exchanger from AMS is a super good idea since the engine will provide much less power if the intake air temp climbs too high (and they do.)

Observations post-tune:
I ran gave it full throttle through a couple gears (3rd-4th) on a sunny 55F day and traction wasn't an issue with stock tires.
On the 3rd pull I noticed the boost only hit 10psi. I'm attributing that to heat soak.
The stock tune seemed to have a few different throttle points.. 0-30%, 30%-60%, 60%-floor. There was a point in the 30-60% range where you got some boost.. like 7psi. I liked this for driving around real-world. Post-tune I don't have it.. it's 0-30 feels great, 30-60% throttle feels wrong after 3k RPMs. Boost reads -5psi. I'm an rank armature at tuning but I think it's targeting the wrong manifold pressure. SOHO knows what they're doing.. I'll have to ask.
WOT is nuts.. stupid amounts of smooth power.
Exhaust combo sounds fantastic. Jah_Happy's video in this thread does it justice.
It's overall a much better experience to drive.

Dyno shows bolt-ons with no tune and post-tune.

Good tune observations! Let us know about that 30-60% throttle issue. Was that only happening on the 3rd pull? Need more consistency for my 20 min (x4) sessions here in warm SoCal. Keep us posted.

 

[TwinZurbo]

Good tune observations! Let us know about that 30-60% throttle issue. Was that only happening on the 3rd pull? Need more consistency for my 20 min (x4) sessions here in warm SoCal. Keep us posted.

The 3rd pull is when I suspect heat soak set in. Need that heat exchanger.

The mid-throttle issue is in any gear.
Hi Performance Academy link for the pic below. This video gave me the idea of what I think the issue is. More info to come!

 

[TwinZurbo]

Following up..

I went back and some adjustments to the throttle table were made. Overall the issue still exists but it's less pronounced.
Super strange tho.. the pressure builds when giving it mid-throttle and the car feels great. When it hits 3k now it's still pulling and feels fine until it blips power somewhere around 3500-3800 RPMS. Feels like the wastegate opens for a quick blip.
If I'm neutral throttle and it creeps above 3k RPM, it's the old problem again.. pushing the pedal down to where I would expect the car to get motivated and it just gets noisy and no boost hits.

Overall I think the stock tune was a much better driving experience than where I'm at. The ldp and 3" exhaust may just be letting the turbo spin itself into oblivion and the wastegate has to step in.

Anyone else run into something similar? I've seen other tunes that looked smooth.. but dyno's are usually posted as WOT. (My WOT feel is fantastic)

I'll post again!

 

[Jah_Happy]

Following up..

I went back and some adjustments to the throttle table were made. Overall the issue still exists but it's less pronounced.
Super strange tho.. the pressure builds when giving it mid-throttle and the car feels great. When it hits 3k now it's still pulling and feels fine until it blips power somewhere around 3500-3800 RPMS. Feels like the wastegate opens for a quick blip.
If I'm neutral throttle and it creeps above 3k RPM, it's the old problem again.. pushing the pedal down to where I would expect the car to get motivated and it just gets noisy and no boost hits.

Overall I think the stock tune was a much better driving experience than where I'm at. The ldp and 3" exhaust may just be letting the turbo spin itself into oblivion and the wastegate has to step in.

Anyone else run into something similar? I've seen other tunes that looked smooth.. but dyno's are usually posted as WOT. (My WOT feel is fantastic)

I'll post again!

Interesting! This is the first I've heard of something like this. Soho is great so I don't have any concerns there, but it does seem odd we haven't heard of this when plenty of others have very similar setups.

Might be a good question for Mark at SonicTuned or someone at AMS.

 

[trackratZ]

Following up..

...When it hits 3k now it's still pulling and feels fine until it blips power somewhere around 3500-3800 RPMS. Feels like the wastegate opens for a quick blip.
If I'm neutral throttle and it creeps above 3k RPM, it's the old problem again.. pushing the pedal down to where I would expect the car to get motivated and it just gets noisy and no boost hits.
...

I'll post again!

Interesting, how did the AFR look like between that RPM range? Running lean or is it just the throttle mapping on the tune?

 

[TwinZurbo]

Interesting, how did the AFR look like between that RPM range? Running lean or is it just the throttle mapping on the tune?

I don't currently have a way to pull that data. I bought a license to tune and took it to soho.
I've been wanting an AFR and an intake charge temp reader..

I suspect some of it may be AFR, some may be throttle mapping.

My concern is I'm asking something unreasonable. Would a different boost controller or a BOV instead of the recirculating wastegate change behaviors? Or perhaps make less desirable behaviors easier to eliminate?