04 DE breather mods, tuned/dyno - MY350Z.COM - Nissan 350Z and 370Z Forum Discussion

Notices
Tuning Reflashes, Piggybacks, Standalone ECUs

04 DE breather mods, tuned/dyno

Old 11-12-2018, 08:42 AM
  #1  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default 04 DE breather mods, tuned/dyno

Hi guys. Last week I dropped my car off with a bunch of boxes Iíve been accumulating, mostly bought here from the forum. They installed a plenum spacer, some APS high flow cats, an APS 2.5Ē cat back exhaust that was modified for turbo use by fabricating a great looking Y pipe, and a full Nismo intake that already came with the car. A bizarre note, I know I had ordered the 5/16 plenum spacer but they said they had to modify the strut bar to fit it, so that makes me think I received a 5/8, but anyway itís installed.

They did a quick dyno pull for me before I left, needless to say I was sorely disappointed at 188hp. He said the dyno was a ďheart breakerĒ SAE model or whatever and that nearly everyone is surprised when they see the low numbers. Thatís with 19,000 miles, a couple thousand above sea level, high humidity, and probably 80į out. 6 speed MT.
I was a bit concerned and called the tuner back asking if he thought my motor/clutch was ok, but he reassured me it was normal.
Anyway, he sent me the new numbers after everything was installed, gained about 37hp and 39 ft pounds of torque, which actually surprised him. Havenít picked the car up yet as heís concerned about the rigidity of the exhaust and wants to add a flex, but says the car sounds awesome.
Cant wait to try it out.

Been trying to upload the dyno forever, nothing

Last edited by Wet feet; 11-12-2018 at 10:00 AM.
Wet feet is offline  
Old 11-12-2018, 09:25 AM
  #2  
bealljk
Registered User
iTrader: (13)
 
Join Date: Apr 2010
Location: col
Posts: 3,611
Thanked 333 Times in 286 Posts
Default

188hp is extremely extremely low - your car is really really down on power! An average middle of the road 350z bone stock and/or some minor mods will make 230 to 240hp!

With your mods and a tune you should be closer to 260hp ... something is wrong

Last edited by bealljk; 11-12-2018 at 09:27 AM.
bealljk is offline  
Old 11-12-2018, 09:40 AM
  #3  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Yea it sure has me thinking. It “feels" strong and powerful, but that says nothing. He says they don’t detect clutch slip, and there’s good compression, maybe his dyno is off??

On another note, what’s up with the new upload feature.... browse device, pick photo, it "loads" onto window, I push Upload, then it disappears. It’s in my Album too. Will keep trying....
Wet feet is offline  
Old 11-12-2018, 10:24 AM
  #4  
guitman32
Professional
iTrader: (15)
 
guitman32's Avatar
 
Join Date: Jul 2005
Location: South FL
Posts: 1,920
Thanked 88 Times in 74 Posts
Default

Sounds like a bufu shop to me.
guitman32 is offline  
Old 11-12-2018, 10:28 AM
  #5  
bealljk
Registered User
iTrader: (13)
 
Join Date: Apr 2010
Location: col
Posts: 3,611
Thanked 333 Times in 286 Posts
Default

Originally Posted by Wet feet View Post
Yea it sure has me thinking. It ďfeels" strong and powerful, but that says nothing. He says they donít detect clutch slip, and thereís good compression, maybe his dyno is off??

On another note, whatís up with the new upload feature.... browse device, pick photo, it "loads" onto window, I push Upload, then it disappears. Itís in my Album too. Will keep trying....
I'd be more concerned that it runs well than what the numbers say. Is there another tuner / shop you can go to?

Try using the 'advanced' features to upload - sometimes mine does that too!

bealljk is offline  
Old 11-12-2018, 11:06 AM
  #6  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Wet feet is offline  
Old 11-12-2018, 11:10 AM
  #7  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Wet feet is offline  
Old 11-12-2018, 12:04 PM
  #8  
travlee
Master
iTrader: (8)
 
travlee's Avatar
 
Join Date: Jul 2011
Location: Texas
Posts: 36,637
Thanked 5,703 Times in 3,920 Posts
Default

Seems way low....y pipe is lacking imho
travlee is online now  
Old 11-12-2018, 12:05 PM
  #9  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Originally Posted by guitman32 View Post
Sounds like a bufu shop to me.
Maybe, but they come highly recommended and have a great reputation, and follow up work if needed.
Wet feet is offline  
Old 11-12-2018, 12:07 PM
  #10  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Originally Posted by travlee View Post
Seems way low....y pipe is lacking imho
In design, or what do you mean?
Wet feet is offline  
Old 11-12-2018, 01:02 PM
  #11  
jv350z
Registered User
iTrader: (6)
 
jv350z's Avatar
 
Join Date: Jan 2004
Location: Mesa, AZ
Posts: 1,031
Thanked 22 Times in 18 Posts
Default

Welds may be nice, but by eyeball, I'm guessing that the volumetric flow rate will be reduced with this ypipe.
jv350z is offline  
Old 11-12-2018, 01:30 PM
  #12  
guitman32
Professional
iTrader: (15)
 
guitman32's Avatar
 
Join Date: Jul 2005
Location: South FL
Posts: 1,920
Thanked 88 Times in 74 Posts
Default

Did they tune it as well, or just install the parts and re-dyno?
guitman32 is offline  
Old 11-12-2018, 01:39 PM
  #13  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

They installed everything and then actually tuned it. I think he said they were on the machine a good 5 hours or so.

I get what you mean on the y pipe. Originally I had walked in the shop wanting a dual set up, but he said thereís usually noticeable torque loss down low thatís difficult if not impossible to tune out. So he recommended a y pipe.
Wet feet is offline  
Old 11-12-2018, 01:54 PM
  #14  
guitman32
Professional
iTrader: (15)
 
guitman32's Avatar
 
Join Date: Jul 2005
Location: South FL
Posts: 1,920
Thanked 88 Times in 74 Posts
Default

Alright well in that case nothing sounds too crazy...the absolute number is less important than trusting the gains on that specific dyno.
guitman32 is offline  
Old 11-12-2018, 01:54 PM
  #15  
travlee
Master
iTrader: (8)
 
travlee's Avatar
 
Join Date: Jul 2011
Location: Texas
Posts: 36,637
Thanked 5,703 Times in 3,920 Posts
Default

Originally Posted by Wet feet View Post


In design, or what do you mean?
in design... isn't much better than than the stock one in my opinion. here is the stock de vs stock hr y pipe

see this thread

https://my350z.com/forum/intake-exha...e-on-a-de.html
travlee is online now  
Old 11-12-2018, 02:06 PM
  #16  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Yea Iíve read lots of y pipe threads, and you may be right. I could throw a Motordyne in there someday. I imagine even as it stands the new one must flow better than the stock crap.

So basically my reason for posting was to get feedback, so I appreciate that. Iím wondering if the 37-39 gains were about on par for what I did? As thatís whatís most important, not necessarily the numbers themselves.
Wet feet is offline  
Old 11-12-2018, 02:16 PM
  #17  
bealljk
Registered User
iTrader: (13)
 
Join Date: Apr 2010
Location: col
Posts: 3,611
Thanked 333 Times in 286 Posts
Default

the Y-pipe looks very nice and sure there may be some inefficiencies with the 90s but it's not the reason youre down 40 additional HP...
bealljk is offline  
Old 11-12-2018, 02:47 PM
  #18  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

I do believe thereís another dyno shop here, so Iíll probably go by and do a comparison. Iím curious what differences or discrepancies may show up.

The motor itself runs fantastically and feels strong.
Wet feet is offline  
Old 11-12-2018, 03:00 PM
  #19  
bealljk
Registered User
iTrader: (13)
 
Join Date: Apr 2010
Location: col
Posts: 3,611
Thanked 333 Times in 286 Posts
Default

I wonder if theyre running a zero correction factor??
bealljk is offline  
Old 11-12-2018, 03:26 PM
  #20  
Wet feet
Registered User
Thread Starter
 
Wet feet's Avatar
 
Join Date: Jul 2017
Location: Costa Rica
Posts: 71
Thanked 1 Time in 1 Post
Default

Originally Posted by bealljk View Post
I wonder if theyre running a zero correction factor??
I believe you are correct, or perhaps the SAE, going to find out tomorrow. Will post.

Last edited by Wet feet; 11-12-2018 at 05:23 PM. Reason: Clarify
Wet feet is offline  

Thread Tools
Search this Thread
Quick Reply: 04 DE breather mods, tuned/dyno


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: