Dyno newbie with a question - LS1GTO.com Forums

Vendors


Go Back   LS1GTO.com Forums > GTO Tech > Tuning/Dyno Results

Reply
 
Thread Tools Rate Thread
Old 04-20-2017, 06:33 PM   #1
xBearxNekkidx
The Sexiest Chalupa
 
xBearxNekkidx's Avatar
 
2006 GTO Owner

Join Date: Apr 2014
Location: Yukon, OK
Posts: 8


Offline
Dyno newbie with a question

I went to a local shop and ran my 06 with 69XXX miles on the economy three pulls for $40, and it doesn't look like my car makes very "smooth" power, if that makes any sense. Mods are a mild cam from Texas speed, vararam, kooks 1 3/4" headers into a 2.5" maganaflow setup with x-pipe, and that's about it engine-wise. I bought the car a few years and more than a few thousand miles ago and I had a graph in the glove box showing 436 "smooth" horsepower, and the only difference was a k&n in the factory location since then. Anyone care to take a stab as to why the graph looks like this? All help is appreciated!
Attached Thumbnails
Click image for larger version

Name:	FB_IMG_1492740843594.jpg
Views:	84
Size:	116.1 KB
ID:	455929  
__________________

06 IBM M6 436hp
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-20-2017, 07:42 PM   #2
A TrainsGTO
Registered User
 
A TrainsGTO's Avatar
 

Join Date: Aug 2014
Location: Magna, Utah. United States
Posts: 135


Offline
Quote:
Originally Posted by xBearxNekkidx...View Post
I went to a local shop and ran my 06 with 69XXX miles on the economy three pulls for $40, and it doesn't look like my car makes very "smooth" power, if that makes any sense. Mods are a mild cam from Texas speed, vararam, kooks 1 3/4" headers into a 2.5" maganaflow setup with x-pipe, and that's about it engine-wise. I bought the car a few years and more than a few thousand miles ago and I had a graph in the glove box showing 436 "smooth" horsepower, and the only difference was a k&n in the factory location since then. Anyone care to take a stab as to why the graph looks like this? All help is appreciated!

Did you put a full K&N system in or did you just put a K&N filter in the stock air box?

The full system sucks in hot air from the engine so the graph could be the engine pulling timing because of heat soak. Just spit balling.
  Reply With Quote Quick reply to this message
Old 04-20-2017, 09:28 PM   #3
Mike05TurboGto
Registered User
 
Mike05TurboGto's Avatar
 

Join Date: Mar 2017
Location: New York
Posts: 7


Offline
How is the car running
__________________


Current Setup:
Sbe LS2, 317s, LJMS Turbo cam, meth, s480 96/1.25

17psi: 856HP/876TQ

Best 1/4 Mile time:

10.59@139
That was on 735/739 from last turbo
  Reply With Quote Quick reply to this message
 
Old 04-20-2017, 10:23 PM   #4
xBearxNekkidx
The Sexiest Chalupa
 
xBearxNekkidx's Avatar
 
2006 GTO Owner

Join Date: Apr 2014
Location: Yukon, OK
Posts: 8


Offline
I bought the car with a full KN intake kit, and it would heat soak bad around town, swapped to the vararam and insulated it well and have had zero issues. The graph above was with the vararam.

Car runs well, doesn't hesitate and feels strong. Can still walk around my friend's scat pack challenger. Just really thrown for a loop on what the graph is telling me.
  Reply With Quote Quick reply to this message
Old 04-21-2017, 02:47 AM   #5
Steel Chicken
Cthulhu's IT D1r3ktФя
 
Steel Chicken's Avatar
 
2004 GTO Owner

Join Date: Dec 2004
Location: Castle Rock, CO
Posts: 20,162
Premium Member


Offline
It could be a lot of things like belt slip or knock/ignition retard. No way to know without logging the car at the same time.
__________________
2004 GTO, Stock LS1 internals, EDC custom cam, TVS2300 @ 14PSI, ETP heads and corn juice. 742 RAWRZORS.

Quote:
Justice is swift and unfair in the eyes of those who don't know shit. - tmiller

  Reply With Quote Quick reply to this message
Old 04-21-2017, 04:28 AM   #6
JimmyGTO
Registered User
 
JimmyGTO's Avatar
 
2006 GTO Owner

Join Date: Aug 2005
Location: Roanoke, Virginia
Posts: 735


Offline
The graph has no smoothing. All dynos that I've been on (4) has a smoothing of 5.
  Reply With Quote Quick reply to this message
Old 04-21-2017, 05:14 AM   #7
Westphal
Registered User
 
2005 GTO Owner

Join Date: Mar 2015
Location: Pasadena, MD
Posts: 231


Offline
Quote:
Originally Posted by JimmyGTO...View Post
The graph has no smoothing. All dynos that I've been on (4) has a smoothing of 5.

This!
  Reply With Quote Quick reply to this message
Old 04-21-2017, 07:32 AM   #8
Nothubertjfarnsworth
ಠ_ಠ
 
Nothubertjfarnsworth's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 28,353
Premium Member


Offline
It's to get that outying peak tq/hp, isn't it?
__________________
( 'o')b

( '_')o

(._. )

Quote:
The real enemy of truth is not ignorance, doubt, or even disbelief. It is false knowledge.

  Reply With Quote Quick reply to this message
Old 04-21-2017, 08:45 AM   #9
Steel Chicken
Cthulhu's IT D1r3ktФя
 
Steel Chicken's Avatar
 
2004 GTO Owner

Join Date: Dec 2004
Location: Castle Rock, CO
Posts: 20,162
Premium Member


Offline
Smoothing doesnt explain the vast difference in spikes in different RPM ranges.
  Reply With Quote Quick reply to this message
Old 04-23-2017, 05:40 AM   #10
JimmyGTO
Registered User
 
JimmyGTO's Avatar
 
2006 GTO Owner

Join Date: Aug 2005
Location: Roanoke, Virginia
Posts: 735


Offline
Quote:
Originally Posted by Steel Chicken...View Post
Smoothing doesnt explain the vast difference in spikes in different RPM ranges.

I was just answering his question why the graph looked a certain way. I never seen one looked that way. I'm not a tuner. I'll let the experts explain that part.
  Reply With Quote Quick reply to this message
Old 04-23-2017, 12:21 PM   #11
Magnified
It's simple physics
 
Magnified's Avatar
 
2006 GTO Owner

Join Date: Apr 2006
Location: West Texas, that's right, oil country
Posts: 3,710


Offline
So many variables. Environment (temp, DA, humidity, etc...), who was running the car, what kind of dynos, etc... What did the operator say?

Here's some good stuff on dynos from the oracle:

http://www.hotrod.com/articles/hrdp-...is-dyno-guide/

LR
__________________
2006 PBM (now dirt brown) A4, Magnacharger, Kooks LT, high flow cats, Magnaflow x-pipe, stock pipes into race glass packs, drag bags, subframe connectors/jacking rails, 18x8.5/40 offset Bayern Mesh chrome up front, 18X9.5/45 in the rear, Michelin Pilot Sport PSII, fender roll, DIY catch can, DIY factory amp mod, tuned by Chuck, black badges.

Street configuration consistent #s ONCE UPON A TIME - 12.13 / 117.5 / 1.90 60 foot. 3.75 second 0-60. Lots of wheel spin.
  Reply With Quote Quick reply to this message
Old 04-24-2017, 02:20 PM   #12
xBearxNekkidx
The Sexiest Chalupa
 
xBearxNekkidx's Avatar
 
2006 GTO Owner

Join Date: Apr 2014
Location: Yukon, OK
Posts: 8


Offline
I'm reading up what I can to understand what happened, but after a plug and wire change the car feels "smoother" to ramp up, and after looking at what I pulled out the plugs were between .015-.065", with most of them around .045", except for three outliers.

I had the foot to the floor in the car, and the button operator said one thing: "Oops I forgot to log that second run".

Thanks for the link!
  Reply With Quote Quick reply to this message
Old 04-24-2017, 02:30 PM   #13
Nothubertjfarnsworth
ಠ_ಠ
 
Nothubertjfarnsworth's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 28,353
Premium Member


Offline
dug up some stuff on "smoothing" myself, since i found this thread interesting.

https://www.corvetteforum.com/forums...hing-mean.html

using 0 smoothing and having a variance of up to 8 hp is significant.
  Reply With Quote Quick reply to this message
Old 04-24-2017, 02:33 PM   #14
Nothubertjfarnsworth
ಠ_ಠ
 
Nothubertjfarnsworth's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 28,353
Premium Member


Offline
https://www.corvetteforum.com/forums...ged-graph.html

more stuff on the smoothing.
  Reply With Quote Quick reply to this message
Old 04-24-2017, 02:35 PM   #15
Nothubertjfarnsworth
ಠ_ಠ
 
Nothubertjfarnsworth's Avatar
 
2005 GTO Owner

Join Date: Sep 2006
Location: NWI
Posts: 28,353
Premium Member


Offline
https://forums.nasioc.com/forums/sho...d.php?t=774781

more
  Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the LS1GTO.com Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live (must be accurate to IP location, if wrong you may be permanently banned)
Insurance
Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 05:01 AM.




Powered by vBulletin® Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.