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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
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dyno #'s

  • Thread starter Thread starter 94opalgt
  • Start date Start date Jul 5, 2007
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Pokageek

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Jun 10, 2005
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Jul 8, 2007
#21
  • Jul 8, 2007
  • #21
Which "type" of dyno is that on Grady? I could not tell by the graph. Thanks.
 

Dino Dino Bambino

15 Year Member
Jun 13, 2007
1,672
89
79
Cyprus
Jul 8, 2007
#22
  • Jul 8, 2007
  • #22
Something definitely doesn't look right to me with that dyno graph. Like I said in my previous posts I would have expected a higher HP number and I would have certainly expected peak HP to come higher than 5400rpm with the Track Heat HCI combo (perhaps ~5800rpm).
I still think valve float is a possibility given that by 6000rpm the graph is down below 280rwhp but I just wonder if the engine might be running too lean at higher rpm. The 24lb injectors are up to the job but there's no mention of which fuel pump was used. If it's the stock 88lph pump, it won't supply enough juice.
 

final5-0

Mustang Master
Apr 6, 2003
6,817
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79
DFW Texas
Jul 8, 2007
#23
  • Jul 8, 2007
  • #23
Pokageek said:
Which "type" of dyno is that on Grady? I could not tell by the graph. Thanks.
Click to expand...

Well Keith

I certainly could not say for sure

Here is a thing or two I've noticed and maybe someone can give more
details about these findings

A lot of the times on these charts where they were done on a Dynojet ....
1) you will see Standard or STD
2) you will see SAE or Corrected
3) some of the time, you see the word smoothing with a value following
that word of 5 a good bit of the time

About 1 & 2

Typically pulls done in the calibration of STD produce higher results
than those done in SAE

About 3

I kinda think it has to do with a filter they can apply to keep the display
from looking so wavy or squiggly

I would like to point out that over the past year .........
I've noticed more and more charts posted with the STD calibration

however

Don't be mislead by this recent change of events

That 300rwhp bench mark we all kind of shoot for
It has been around for several years now
and
It was most certainly derived from the SAE cal :Word:

Grady
 

moneypit94

Active Member
May 23, 2003
1,723
2
39
Macomb, IL
Jul 8, 2007
#24
  • Jul 8, 2007
  • #24
I know this has been said a hundred times now, but dyno numbers are nice to look at but ET's and MPH will really show you whats going on especially compared to other cars running there. My car with the old setup has had over 100 pulls on verious dyno's. Each dyno read something a little differently. Results from 420-510 hp. Now what i gained and liked about the dyno was driveability. Thats why my first choice is AFM now because Danny spends 80 percent of the time working on the drivability and 20% of the time on peak #'s. His 488 hp he got out of my car was so much more fun to drive then the 510 hp that i got at the previous shop.
 

final5-0

Mustang Master
Apr 6, 2003
6,817
12
79
DFW Texas
Jul 8, 2007
#25
  • Jul 8, 2007
  • #25
moneypit94 said:
I know this has been said a hundred times now, but dyno numbers are nice to look at but ET's and MPH will really show you whats going on especially compared to other cars running there. My car with the old setup has had over 100 pulls on verious dyno's. Each dyno read something a little differently. Results from 420-510 hp. Now what i gained and liked about the dyno was driveability. Thats why my first choice is AFM now because Danny spends 80 percent of the time working on the drivability and 20% of the time on peak #'s. His 488 hp he got out of my car was so much more fun to drive then the 510 hp that i got at the previous shop.
Click to expand...

I do admit you can find differences between
types of dynos
how they were calibrated
the tuners ability
etc

But that is the thing about SAE results ........
they at least try to keep things on a fair comparison

Sure there are factors that can skew the data

Now lets talk about strip results

Not all drivers have the same driving ability
You got weather conditions
You got strip elevation
You got track preparation
etc

So you could say like the dyno method of comparing combos .........
it has its share of factors that can skew the findings

I see both as valuable tools one can use

Grady
 

final5-0

Mustang Master
Apr 6, 2003
6,817
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79
DFW Texas
Jul 8, 2007
#26
  • Jul 8, 2007
  • #26
I did a real quick comparo but the numbers are fairly close

Grady

 

94opalgt

Member
May 5, 2005
358
0
17
AKRON,OHIO
Jul 8, 2007
#27
  • Jul 8, 2007
  • #27
it was a dyno jet.

the car has a 255 fuel pump

george spends most of his time on the drivability of the car also. who cares how much power your car makes if it drives like a p.o.s. his car makes 725rwhp and is a daily driver. when 5.0 magazine did the article on trick flows new 4.6 intake a couple of months ago, k.j. jones went for a ride in that car wrote a little bit about it in the article.

thanks for posting the graphs for me grady
 

blksn955.o

Founding Member
Mar 15, 2002
3,263
0
66
st.louis mo 314
Jul 8, 2007
#28
  • Jul 8, 2007
  • #28
wow, that is close...that would be a nice race to see.
 

94opalgt

Member
May 5, 2005
358
0
17
AKRON,OHIO
Jul 8, 2007
#29
  • Jul 8, 2007
  • #29
i think my coupe would win being as it is a bit lighter than the vert
 
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