2010-2014 Mustang Information on The S197 {GenII}

Dyno'd

Thread Tools
 
Search this Thread
 
Old 3/25/10, 02:11 PM
  #121  
Legacy TMS Member
 
Bert's Avatar
 
Join Date: January 25, 2010
Location: Massachusetts
Posts: 3,849
Received 1,573 Likes on 1,078 Posts
Originally Posted by PTRocks
The major problem is that the "affordable" dynos don't measure torque directly, but rather infer it from acceleration of a rotating assembly . . . . . The point the article makes is that the most reasonable measure of real world performance is actual real wheel horsepower, without the correction factors.
now THAT all makes perfect sense . . . once you start applying "correction" (aka fudge) factors, we enter the relm of voodoo, not reality . . . . about as meaningful as bunnies with pancakes on their heads
Old 3/25/10, 02:13 PM
  #122  
eci
Banned
 
eci's Avatar
 
Join Date: August 16, 2006
Posts: 1,633
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Stormbringer
Well Im really in no position to argue with you. All I have is the graph and the statement from Dynojet. Is your G8 a GT or GXP?
GT. It can be manually put into gear. 4th is 1:1.
Old 3/25/10, 03:05 PM
  #123  
Shelby GT350 Member
 
RedCandy5.0's Avatar
 
Join Date: June 9, 2008
Location: Rochester NY
Posts: 2,061
Likes: 0
Received 1 Like on 1 Post
Good way for Ford to sell more cars. Maybe inside line gets a little kick back from Ford with there dyno #'s.
Old 3/25/10, 03:41 PM
  #124  
V6 Member
 
sknapp302's Avatar
 
Join Date: September 15, 2004
Posts: 56
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Stormbringer
A buddy of mine contacted Dynojet about this same discussion regarding with what gear the measurement is done. Looks to me like we could expect to see a higher HP number if this was done in the 1:1 gear. This is what Kevin Lockliear at Dynojet had to say:

"Typically, you will see the highest numbers in the 1:1 or closest to 1:1 ratio gear. This is because no additional power is being exhausted to accelerate the inertia of the drivetrain. In 2nd gear, let’s say, because the gearing allows the car to accelerate more quickly, more HP will be used to accelerate the inertia of the drivetrain than in 1:1. See my graph below. This example was a 1996 Pontiac Trans Am WS6, all gear run. Ignore the small shift spikes at the beginning of each gear as that’s an inertia spike (where letting the clutch out abruptly against an engine with higher RPM than matching the next gear at that speed causes a brief quick acceleration of the drums).


As you can see, the HP was the highest in the 1:1 gear, and lower in other gears. From what I have experienced, the further you get from 1:1, the lower the power getting to the wheels and drum surface will be, as more is used to accelerate the inertia of the drivetrain, overcome frictional losses in meshing gears, side loading bearings, etc."
Thank you for posting this. When I have gone to dynos in the past and done simulated runs 1-4, the graphs have always looked like this. It just made sense to me that 4th (1:1) was the most efficient because the transmission has to work the least in this gear. Conservation of energy, what goes in must come out, and with a 1:1 ratio there is little place to loose energy. A dyno run from a different gear than 1:1 will load the dyno at a different speed. However, the math would yield the same horsepower in each gear if there was no difference in parasitic loss from gear to gear.

Power = work/time How fast can you use your available torque.
Old 3/25/10, 03:47 PM
  #125  
Shelby GT350 Member
 
RedCandy5.0's Avatar
 
Join Date: June 9, 2008
Location: Rochester NY
Posts: 2,061
Likes: 0
Received 1 Like on 1 Post
ITS 395!!! GET OVER IT ALREADY!!!!
Old 3/25/10, 03:50 PM
  #126  
eci
Banned
 
eci's Avatar
 
Join Date: August 16, 2006
Posts: 1,633
Likes: 0
Received 0 Likes on 0 Posts
lol! No, now it's more! 475 crank!!!!
Old 3/25/10, 04:27 PM
  #127  
Bullitt Member
 
whysoserious's Avatar
 
Join Date: September 8, 2009
Location: San Antonio, TX
Posts: 350
Likes: 0
Received 1 Like on 1 Post
Wrong! It just went up to 500 crank and the redline has been raised to 8500 RPM.
Old 3/25/10, 04:28 PM
  #128  
eci
Banned
 
eci's Avatar
 
Join Date: August 16, 2006
Posts: 1,633
Likes: 0
Received 0 Likes on 0 Posts
Awesome!!!
Old 3/25/10, 04:47 PM
  #129  
Cobra Member
 
Red Jay's Avatar
 
Join Date: September 9, 2009
Location: Tulsa OK
Posts: 1,465
Likes: 0
Received 0 Likes on 0 Posts
lol. if this engine is really pushing 430+ crank HP, then just imagine how much for the BOSS version of it. or any SE version of it.
Old 3/25/10, 05:13 PM
  #130  
eci
Banned
 
eci's Avatar
 
Join Date: August 16, 2006
Posts: 1,633
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Red Jay
lol. if this engine is really pushing 430+ crank HP, then just imagine how much for the BOSS version of it. or any SE version of it.
At least 600HP, N/A. With tune/CAI, 750.
Old 3/25/10, 05:22 PM
  #131  
GT Member
 
tbi0904's Avatar
 
Join Date: January 10, 2010
Location: huntley, il
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Stormbringer
A buddy of mine contacted Dynojet about this same discussion regarding with what gear the measurement is done. Looks to me like we could expect to see a higher HP number if this was done in the 1:1 gear. This is what Kevin Lockliear at Dynojet had to say:

"Typically, you will see the highest numbers in the 1:1 or closest to 1:1 ratio gear. This is because no additional power is being exhausted to accelerate the inertia of the drivetrain. In 2nd gear, let’s say, because the gearing allows the car to accelerate more quickly, more HP will be used to accelerate the inertia of the drivetrain than in 1:1. See my graph below. This example was a 1996 Pontiac Trans Am WS6, all gear run. Ignore the small shift spikes at the beginning of each gear as that’s an inertia spike (where letting the clutch out abruptly against an engine with higher RPM than matching the next gear at that speed causes a brief quick acceleration of the drums).


As you can see, the HP was the highest in the 1:1 gear, and lower in other gears. From what I have experienced, the further you get from 1:1, the lower the power getting to the wheels and drum surface will be, as more is used to accelerate the inertia of the drivetrain, overcome frictional losses in meshing gears, side loading bearings, etc."
That's what the post from another forum I posted pretty much stated as well (not as technical, though). If they ran it in 5th, the numbers would be higher. Personally, it's a little over my head, but it makes for some good chatter.
Old 3/25/10, 05:23 PM
  #132  
GT Member
 
tbi0904's Avatar
 
Join Date: January 10, 2010
Location: huntley, il
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by eci
At least 600HP, N/A. With tune/CAI, 750.
Flux capacitor option:1200rwhp, 40mpg, stock internals. Truth.
Old 3/25/10, 05:26 PM
  #133  
Tasca Super Boss 429 Member
 
Five Oh Brian's Avatar
 
Join Date: November 14, 2007
Location: Pacific NW USA
Posts: 3,652
Likes: 0
Received 8 Likes on 6 Posts
Oh my, this is getting rather silly. Let's not make too much noise about this dyno pull. Dyno's are tuning tools, no more.

Want to know how much power is really getting to the ground? Take an '11 GT to the dragstrip and let's see what it'll run. With 412 flywheel hp and weighing 3600 lbs (closer to 3800 lbs with a driver), that equates to 112 mph trap speeds in the 1/4 mile. If it really makes 395 rwhp, then it'll run 114 mph through the traps. The proof is all in the timeslips when they start happening.
Old 3/25/10, 05:56 PM
  #134  
Cobra Member
 
todd03blown's Avatar
 
Join Date: November 30, 2009
Location: South
Posts: 1,121
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by eci
Doesn't mesh with my dynosheets or anyone elses. I really wish Insideline would clear it up, or someone else would throw one on the dyno. Are we now to believe the car would put out 410 in 5th? Are we to believe the engine is actually worth 475 crank HP, and Ford is just "underrating it" to 412?

I pulled my two sheets from the G8 out, 331 in 3rd, 301 in 4th. Dynojet 248c.

I'll be on a 224xLC with my Mustang in a week, I'll have them run it in 3rd which is close to the ratio of the GT's 4th.
did the other poster provide a dyno sheet and a response from the Dyno manufacturer regarding dynoing in the "wrong" gear?
Old 3/25/10, 06:00 PM
  #135  
Bullitt Member
 
whysoserious's Avatar
 
Join Date: September 8, 2009
Location: San Antonio, TX
Posts: 350
Likes: 0
Received 1 Like on 1 Post
Actually eci they have already tested these, the real problem with the 750 HP variant is that at that point (9500 RPM) torque has been sacrificed to the point that it no longer exists. That's right. Zero torque. Can't have it all.
Old 3/25/10, 06:03 PM
  #136  
eci
Banned
 
eci's Avatar
 
Join Date: August 16, 2006
Posts: 1,633
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by whysoserious
Actually eci they have already tested these, the real problem with the 750 HP variant is that at that point (9500 RPM) torque has been sacrificed to the point that it no longer exists. That's right. Zero torque. Can't have it all.
A singularity? Hm....
Old 3/25/10, 06:12 PM
  #137  
Shelby GT350 Member
 
dmhines's Avatar
 
Join Date: September 11, 2006
Location: Cumming, GA
Posts: 2,349
Likes: 0
Received 4 Likes on 3 Posts
FYI ... back when I had the 4.0 and X-Charger I had the Dyno guy do a run in 3rd. The 4th Gear run showed higher HP/TQ than 3rd Gear.
Old 3/25/10, 06:13 PM
  #138  
Member
 
Jeffs08GT's Avatar
 
Join Date: February 28, 2008
Location: Greeley, CO
Posts: 37
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Ltngdrvr
Ford may well have gone conservative on the power ratings so that they can put up new numbers against whatever new numbers the bowtie boys put out in response.

Also, remember that most of the 03-04 terminator cars dyno'd stronger than what their official power ratings would have suggested they would.
Heck my 03 Cobra dynoed 390rwhp bone stock and 415rwhp with just exhaust. I have high hopes for the 5.0

I'll say if these engines really are this underrated when they start getting into public hands, and there aren't huge HP fluctuations between cars, I might just have to purchase one sooner then I wanted.. ugh!!

Last edited by Jeffs08GT; 3/25/10 at 06:17 PM.
Old 3/25/10, 06:22 PM
  #139  
Cobra R Member
 
Fazm's Avatar
 
Join Date: September 21, 2004
Posts: 1,664
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Jeffs08GT
Heck my 03 Cobra dynoed 390rwhp bone stock and 415rwhp with just exhaust. I have high hopes for the 5.0

I'll say if these engines really are this underrated when they start getting into public hands, and there aren't huge HP fluctuations between cars, I might just have to purchase one sooner then I wanted.. ugh!!
and mine at 382
Old 3/25/10, 06:33 PM
  #140  
Shelby GT350 Member
 
dmhines's Avatar
 
Join Date: September 11, 2006
Location: Cumming, GA
Posts: 2,349
Likes: 0
Received 4 Likes on 3 Posts
It's just very bizarre that Ford would UNDER rate the GT considering their primary competition is the Camaro SS and they would want to beat it in HP ratings. Heck ... they made sure to beat the V6 Camaro by 1 HP just to say they did.


Quick Reply: Dyno'd



All times are GMT -6. The time now is 03:38 AM.