Notices
Engine & Drivetrain VQ Power and Delivery

270whp VQ dyno!

Thread Tools
 
Search this Thread
 
Old 05-19-2008, 12:31 PM
  #21  
DandyMax
Registered User
iTrader: (2)
 
DandyMax's Avatar
 
Join Date: Feb 2005
Location: Canada
Posts: 45
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Zexy
lol i wouldnt let that get pass my tuner. that's one nasty dip. nice peak hp #s nontheless!!
It's a limitation of doing it with the Emanage Ultimate (EU). The stock ECU cuts fuel off almost completely at 6500. To keep revving up the EU has to add fuel past that point, but it can't react quickly enough to span the gap in a seamless manner. If you wait to add fuel until 6500 right on the nose you get a big lean stumble, and it's difficult to get past the cut. Therefore fuel has to be added 50 or 100 rpms early, and then you get a rich blurp, which is what shows up on the dyno. The trick is to play with how much fuel gets added such that you get the transition passed as smoothly as possible, but it can never be perfect.

Although it looks ugly on the dyno, in the real world the car is accelerating through the rpm band fast enough (especially in lower gears) that you only feel a very slight blip in the car, and from the outside most of the time you can't even hear it in the engine tone.
Old 05-19-2008, 01:27 PM
  #22  
KA24DE
Registered User
Thread Starter
 
KA24DE's Avatar
 
Join Date: May 2008
Location: FLA
Posts: 363
Received 3 Likes on 3 Posts
Default

Originally Posted by DandyMax
It's a limitation of doing it with the Emanage Ultimate (EU). The stock ECU cuts fuel off almost completely at 6500. To keep revving up the EU has to add fuel past that point, but it can't react quickly enough to span the gap in a seamless manner. If you wait to add fuel until 6500 right on the nose you get a big lean stumble, and it's difficult to get past the cut. Therefore fuel has to be added 50 or 100 rpms early, and then you get a rich blurp, which is what shows up on the dyno. The trick is to play with how much fuel gets added such that you get the transition passed as smoothly as possible, but it can never be perfect.

Although it looks ugly on the dyno, in the real world the car is accelerating through the rpm band fast enough (especially in lower gears) that you only feel a very slight blip in the car, and from the outside most of the time you can't even hear it in the engine tone.
I can't wait to see what you do with the VQ35DE.

Question, is the Variable Manifold better on the 35 or the 30?
Old 05-19-2008, 01:29 PM
  #23  
Alberto
Cranky FI Owner
iTrader: (14)
 
Alberto's Avatar
 
Join Date: Mar 2003
Location: DMV
Posts: 34,716
Likes: 0
Received 8 Likes on 8 Posts
Default

Sick power curve, I love it.
Old 05-19-2008, 01:32 PM
  #24  
KA24DE
Registered User
Thread Starter
 
KA24DE's Avatar
 
Join Date: May 2008
Location: FLA
Posts: 363
Received 3 Likes on 3 Posts
Default

Originally Posted by Alberto
Sick power curve, I love it.
If it gets Albertos seal of approval, you know its good.
Old 05-19-2008, 04:04 PM
  #25  
Z1 Performance
Former Sponsor
iTrader: (564)
 
Z1 Performance's Avatar
 
Join Date: Feb 2003
Location: Long Island, New York
Posts: 19,266
Likes: 0
Received 5 Likes on 5 Posts
Default

Originally Posted by KA24DE
*waiting for Adam From Z1 to say how you need a fully built motor for 280whp*
why? several people have already achieved right around that power figure on a stock bottom end. Congrats on your #'s
Old 05-19-2008, 06:55 PM
  #26  
bimmertech
Registered User
iTrader: (10)
 
bimmertech's Avatar
 
Join Date: Aug 2007
Location: kansas city
Posts: 607
Likes: 0
Received 0 Likes on 0 Posts
Default

i would love to see what would happen after a vq35 head swap--yes i know about the compression loss.

you maxima guys are holding it down.

what are the plans for the 35?
Old 05-20-2008, 03:57 PM
  #27  
KA24DE
Registered User
Thread Starter
 
KA24DE's Avatar
 
Join Date: May 2008
Location: FLA
Posts: 363
Received 3 Likes on 3 Posts
Default

To Kick *** and take names.
Old 05-20-2008, 05:48 PM
  #28  
DandyMax
Registered User
iTrader: (2)
 
DandyMax's Avatar
 
Join Date: Feb 2005
Location: Canada
Posts: 45
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by KA24DE
Question, is the Variable Manifold better on the 35 or the 30?
Define "better". All depends on the setup and what powerband is being sought I think. And which engine it's paired to, I doubt the 3L VI would do well on the 3.5 though (port diameter). I won't be using either one on my build to be honest.


Originally Posted by bimmertech
you maxima guys are holding it down.

what are the plans for the 35?
This time it's not an N/A project... build + boost + standalone =

Last edited by DandyMax; 05-20-2008 at 06:10 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
silverbullet_Z
NA Builds
24
11-14-2015 02:52 AM
seagrasser
Zs & Gs For Sale
6
10-11-2015 03:27 PM
NissanZcrazy
Forced Induction
4
09-23-2015 07:59 AM



Quick Reply: 270whp VQ dyno!



All times are GMT -8. The time now is 11:49 AM.