Notices
Series I Tech Garage The place to discuss anything technical about the RX-8 that doesn't fit into any of the categories below.

How does my stock dyno look?

Thread Tools
 
Rate Thread
 
Old Jan 29, 2008 | 05:47 PM
  #1  
Vasichko's Avatar
Thread Starter
Registered
iTrader: (1)
 
Joined: Apr 2006
Posts: 522
Likes: 0
From: Plano, TX
How does my stock dyno look?

So I had this done back in August when it was about 98 degrees outside.

Sorry if its bad quality, I didnt have a scanner here and just found it while going through my file cabinent so snapped it with the digi cam.

I put down 174hp and 125tq.

Look ok to you guys?
Attached Thumbnails How does my stock dyno look?-dsc00015.jpg   How does my stock dyno look?-dsc00016.jpg  
Reply
Old Jan 29, 2008 | 05:53 PM
  #2  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
It looks like a stock dyno ......

post it up in the Dyno sticky thread
Reply
Old Jan 29, 2008 | 05:57 PM
  #3  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
the a/f doesn't look like a stock graph.

which gear was this pull done in?
Reply
Old Jan 29, 2008 | 06:02 PM
  #4  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
Originally Posted by mac11
the a/f doesn't look like a stock graph.

?
looks like the sensor was not connected ....
Reply
Old Jan 29, 2008 | 06:03 PM
  #5  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
wouldn't that lead to no reading?
Reply
Old Jan 29, 2008 | 06:05 PM
  #6  
mysql101's Avatar
⎝⏠⏝⏠⎠
 
Joined: Apr 2004
Posts: 8,625
Likes: 5
From: USA
you don't need afr to calculate hp/tq.

the graph looks like a standard rx8 NA dyno chart. Not high end, not low end. Just looks typical.
Reply
Old Jan 29, 2008 | 06:13 PM
  #7  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
Originally Posted by mysql101
you don't need afr to calculate hp/tq.
I understand that. I was just noticing that ~15:1 afrs shouldn't be right and I can't remember the AFR's being that flat on a stock plot.

The power plot looks typical.
Reply
Old Jan 29, 2008 | 06:16 PM
  #8  
mysql101's Avatar
⎝⏠⏝⏠⎠
 
Joined: Apr 2004
Posts: 8,625
Likes: 5
From: USA
i'd say it's impossible for the stock pcm in this car to be that lean in open loop.
Reply
Old Jan 29, 2008 | 07:16 PM
  #9  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 28
From: Under my car
Yeah, that AFR reading is not coming from the car.
That said, having the probe sitting in open air should have read at least 22:1.
Weird.

How sad is it that a perfectly normal, stock dyno plot for an RX-8 yields 174 HP and 125 tq?
Reply
Old Jan 29, 2008 | 07:19 PM
  #10  
Optical TDI's Avatar
Registered User
iTrader: (2)
 
Joined: Dec 2007
Posts: 184
Likes: 0
From: Cleveland
Why does the power and torque dip at two points? One is at around 6300 RPMs.
Reply
Old Jan 29, 2008 | 07:21 PM
  #11  
nycgps's Avatar
Out of NYC
iTrader: (1)
 
Joined: Jun 2005
Posts: 19,881
Likes: 36
From: Planet Earth
Originally Posted by Optical TDI
Why does the power and torque dip at two points? One is at around 6300 RPMs.
becuz thats when some of the port opens.
Reply
Old Jan 29, 2008 | 07:26 PM
  #12  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 28
From: Under my car
First dip is the SSV opening. The second is the APV.
Kinda sad that a power adder takes away power first.
I'd call that crappy tuning, but there is really nothing you can do about it with just fuel and spark.
Since Mazda has a stepper motor on the APV, they should have it open gradually.

Last edited by MazdaManiac; Jan 30, 2008 at 12:44 AM.
Reply
Old Jan 29, 2008 | 10:35 PM
  #13  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
Originally Posted by MazdaManiac
Kinda sad that a power added take away power first.
.
agreed - but according to THIS Mazda already considered that .
Reply
Old Jan 29, 2008 | 10:43 PM
  #14  
mac11's Avatar
Rotary , eh?
iTrader: (1)
 
Joined: Jun 2006
Posts: 1,850
Likes: 1
From: Elkhart, IN
you're an ***!
Reply
Old Jan 29, 2008 | 10:43 PM
  #15  
chickenwafer's Avatar
Nope
iTrader: (9)
 
Joined: Jan 2007
Posts: 3,312
Likes: 0
From: Denver
Damn!
Reply
Old Jan 30, 2008 | 12:11 AM
  #16  
swoope's Avatar
Zoom-Freakin'-Zoom
iTrader: (5)
 
Joined: Jan 2004
Posts: 14,603
Likes: 36
From: orlando, fl
Originally Posted by Brettus
agreed - but according to THIS Mazda already considered that .

excellent timing on that.. good job!

beers
Reply
Old Jan 30, 2008 | 12:44 AM
  #17  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 28
From: Under my car
FAIL! I know you've been trying to get me back on that one Brett, but you will have to keep trying.
Reply
Old Jan 30, 2008 | 12:52 AM
  #18  
Brettus's Avatar
Boosted Kiwi
iTrader: (2)
 
Joined: Apr 2006
Posts: 20,848
Likes: 1,804
From: Y-cat-o NZ
i'm sure you would have fallen for it if not for the comments after
Reply
Old Jan 30, 2008 | 01:00 AM
  #19  
MazdaManiac's Avatar
Banned
iTrader: (3)
 
Joined: Oct 2003
Posts: 16,386
Likes: 28
From: Under my car
Originally Posted by Brettus
i'm sure you would have fallen for it if not for the comments after
I'm pretty careful about clicking on links to YouTube stuff.
You need to spoof the addy.
Reply
Old Jan 30, 2008 | 01:38 AM
  #20  
swoope's Avatar
Zoom-Freakin'-Zoom
iTrader: (5)
 
Joined: Jan 2004
Posts: 14,603
Likes: 36
From: orlando, fl
Originally Posted by MazdaManiac
I'm pretty careful about clicking on links to YouTube stuff.
You need to spoof the addy.

x2,

i knew what it was by the u tube address. how sad is that..

beers
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Hunterkelley24
Series I Engine Tuning Forum
14
Jun 14, 2022 08:32 AM
fourwhls
RX-8's For Sale/Wanted
7
Feb 20, 2019 05:16 PM
projectr13b
RX-8 Racing
20
May 14, 2016 06:25 PM
Digitz0070
Series I Exterior Appearance and Body Kits
6
Oct 7, 2015 12:43 PM
duworm
Series I Wheels, Tires, Brakes & Suspension
1
Oct 1, 2015 04:57 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 05:10 PM.