Dyno Tune issues past 6500

pitser73 · 07-26-2017, 01:13 PM

So I've been a lurker on these forums for a while, but I'm finally diving in with a tune yesterday. Went to my local Master installer of ECUtek and was pleased to see the current results. But there were a few issues on the dyno.

1.) They were saying my left and right bank were not even...should I be worried? They say they got it evened out, but how is a mystery to me - any explanation as to how to even them out.
2.) On my first run, I had a dip right at 5k....whats going on there?
3.) Lastly, the top end of my rpms 6500-7500 there was an issue where the engine was leaning out to a dangerous point (this can be seen in the dyno graph attached). Looking at the duty cycle of the injectors, they were only at 89%. We didn't have time to try to pull a fuel pump or check individual injectors so we just capped my rev limiter to 6500. You guys see/know any issues around this point in the rpm band? I thought our pump and injectors were good well past my current point of tuning. Any thoughts?

What I have: 2014 Nismo w/17k miles
Current Power Mods: K&N Panel Filters, Z1 Post MAF Tubes, Fast Intentions Test Pipe/TDX
Current Install Plan: CJM Return Fuel System / Flex Fuel (S1.SE), Walbro 450, ID 1050x Injectors
Final Goals: BP Twin Scroll on E85 (500-600whp)

Elmo370z · 07-26-2017, 03:25 PM

Quote:

Originally Posted by pitser73

So I've been a lurker on these forums for a while, but I'm finally diving in with a tune yesterday. Went to my local Master installer of ECUtek and was pleased to see the current results. But there were a few issues on the dyno.

1.) They were saying my left and right bank were not even...should I be worried? They say they got it evened out, but how is a mystery to me - any explanation as to how to even them out.
2.) On my first run, I had a dip right at 5k....whats going on there?
3.) Lastly, the top end of my rpms 6500-7500 there was an issue where the engine was leaning out to a dangerous point (this can be seen in the dyno graph attached). Looking at the duty cycle of the injectors, they were only at 89%. We didn't have time to try to pull a fuel pump or check individual injectors so we just capped my rev limiter to 6500. You guys see/know any issues around this point in the rpm band? I thought our pump and injectors were good well past my current point of tuning. Any thoughts?

What I have: 2014 Nismo w/17k miles
Current Power Mods: K&N Panel Filters, Z1 Post MAF Tubes, Fast Intentions Test Pipe/TDX
Current Install Plan: CJM Return Fuel System / Flex Fuel (S1.SE), Walbro 450, ID 1050x Injectors
Final Goals: BP Twin Scroll on E85 (500-600whp)

I have a brand new set of 1050x for sale if you're interested. You could always try another tuner, they are doing something wrong. Seb does remote tunes.

pitser73 · 07-27-2017, 12:45 AM

Quote:

Originally Posted by Elmo370z

I have a brand new set of 1050x for sale if you're interested. You could always try another tuner, they are doing something wrong. Seb does remote tunes.

I saw your injectors, I wanted to see if anyone had any help on the issues before I start throwing parts at this thing.

My tuner was saying he could change the hard values, but It was strange seeing the injectors at 89% not being able to keep up. You could see my AFR just leaning out at an incredible steep line.

pitser73 · 07-27-2017, 09:15 PM

Any info?? Or do I just need to upgrade my tuner

Elmo370z · 07-28-2017, 03:19 AM

Different tuner. Seb at specialty Z does remote tunes. Does your tuner tune 370z often?

Jayhovah · 07-28-2017, 10:15 AM

Quote:

Originally Posted by Elmo370z

Different tuner. Seb at specialty Z does remote tunes. Does your tuner tune 370z often?

This should have been a pretty simple tune. Was everything running OK on the OEM tune?

pitser73 · 07-28-2017, 10:39 AM

They said the left and right banks were not running even... I'm assuming that contributed to the issues, but how that happens is something I don't know.

pitser73 · 07-28-2017, 10:43 AM

Quote:

Originally Posted by Elmo370z

Different tuner. Seb at specialty Z does remote tunes. Does your tuner tune 370z often?

He is more specialized with brz/frs. However, he was tuning a turbo 370 the week before me and came highly recommend by a buddy mine who has a twin turbo G35.

07-28-2017, 03:19 AM	#5 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	Different tuner. Seb at specialty Z does remote tunes. Does your tuner tune 370z often? Jayhovah likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New ECUTEK tune (Switched from my Uprev dyno tune) by SpecialtyZ	edconline	Tuning	40	03-29-2017 07:00 PM
Street Tune V.S. Dyno tune. Which is better?	KratikosG37	Tuning	20	05-19-2015 12:02 PM
dyno/tune videos	mag_black	Nissan 370Z Photos / Spyshots / Video / Media Gallery	0	08-23-2013 12:31 AM
Will I need a Dyno Tune?	Gman91111	Nissan 370Z General Discussions	2	11-19-2012 04:13 PM
dyno tune vs street tune	draper	Tuning	6	04-11-2011 10:55 PM

07-27-2017, 09:15 PM	#4 (permalink)
pitser73 Base Member Join Date: Feb 2017 Location: WA Posts: 86 Drives: '14 370z Nismo Rep Power: 8	Any info?? Or do I just need to upgrade my tuner

07-28-2017, 10:39 AM	#7 (permalink)
pitser73 Base Member Join Date: Feb 2017 Location: WA Posts: 86 Drives: '14 370z Nismo Rep Power: 8	They said the left and right banks were not running even... I'm assuming that contributed to the issues, but how that happens is something I don't know.