Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Maggie Dyno Numbers

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Old 05-27-2012, 09:52 PM
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The average drive train loss on the v is between 17%-19%
Old 05-29-2012, 09:50 AM
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Originally Posted by Onefast V
The average drive train loss on the v is between 17%-19%
Very true.
Old 05-29-2012, 10:03 AM
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What type of dyno? I heard Mustang dyno's are conservative with their numbers.
Old 06-03-2012, 09:29 AM
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Yes it was a mustang dyno...that's crazy that a few people said the same things about the mustang dyno. I still think I'm going to do the 2.6 and re-tune soon. thanks everyone for your input.
Old 06-03-2012, 11:28 AM
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Originally Posted by GFallen
that's crazy that a few people said the same things about the mustang dyno.
Not really... Mustang and a few other brands use a loaded (eddy current) to place a load (or brake). Where as SOME (all older ones) Dynojets are inertia type (fixed drum weight). Ive seen 8-10% harder to push an eddy current type vs Inertia.
Some new Dynojet models allow steady state (are similar loading to the mustang)
Old 06-03-2012, 05:11 PM
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vmapper so in your opion which style of dyno would be more accuarate? I was tuned on a Mustang dyno.
Old 06-03-2012, 07:52 PM
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Originally Posted by GFallen
vmapper so in your opion which style of dyno would be more accuarate? I was tuned on a Mustang dyno.
More accurate? - that is an illogical question. like trying answering why is the earth flat? or is this torque wrench more accurate than another.

they are both quite accurate and precise, they are a precision tool. Of course, some shops neglect the calibration and maintenance and some operators dont understand how they work... its what causes variances, not the dynos. (e.g. would be to use a correction factor on a turbo wastegate controlled engine - you see this lots and its 100% incorrect) The dyno use Formulated Correction from various instruments to gather air conditions. - again, I laugh at people saying ' it was a hot day' yea so? the SAE for example, being one of several correction factors, takes that into consideration and adjusts to the Standard Automotive Engineering standardized factor.(J1349).

You have set a base for your sweet maggie ride...
you can now see what mods in the future alter your curve characteristics or notice the tq / hp increase.

Dynos are not just for WOT runs either... they are very useful in steady state tuning (a very good, tuning method) to squeeze out every hp, optimize throttle response and mpg.

An eddy current dyno, places more of a 'real world' load on the drivetrain and engine. that would be the edge IMO... for tuning, eddy current all the way.
Old 06-03-2012, 10:01 PM
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^^ Dynojet has an eddy now too so be careful lumping them in as apples/oranges. They dnojet eddy still reads about the same as the inertia one. I do most of my tuning on a dynojet with an eddy brake.
Old 06-04-2012, 12:31 AM
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Originally Posted by Gabbiani
^^ Dynojet has an eddy now too so be careful lumping them in as apples/oranges. They dnojet eddy still reads about the same as the inertia one. I do most of my tuning on a dynojet with an eddy brake.
Dynojet 224xLC read lower than the inertia types. but still a bit more than a mustang dyno. Andy at A&A will tell you the same.
I use the loaded dynojet for my steady state tuning.
Old 06-04-2012, 08:16 AM
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I bought a 224x with and eddy brake and just sharing my experience.
Old 09-29-2012, 06:21 PM
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Originally Posted by vmapper
"Outside temp and conditions" does not play a factor as long as a correction factor is being used... thats the whole purpose of a correction factor with the dyno. To include humidity/temp/ambient air pressure. I always laugh at guys that say.. it was a HOT day in the dyno shop..
Well ****.
Learn something new every day.
That's disappointing.. lol
Old 04-02-2013, 07:51 AM
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link to the 2.6 pulley?
Old 04-02-2013, 10:18 AM
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Originally Posted by JayBirdWs6
link to the 2.6 pulley?
what hub style do you have?

TVS style:
http://www.smoothflowpulleys.com/TVS...nt_Pulley.html
Old 04-02-2013, 12:24 PM
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Originally Posted by Onefast V
what hub style do you have?

TVS style:
http://www.smoothflowpulleys.com/TVS...nt_Pulley.html
maggie 112
Old 04-02-2013, 12:25 PM
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Originally Posted by JayBirdWs6
maggie 112
that doesn't help... that mp112 has 2 hub styles, one is a 4 bolt TVS style (newer design). the old design was a keyed single nut style.
Old 04-02-2013, 12:29 PM
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Originally Posted by Onefast V
that doesn't help... that mp112 has 2 hub styles, one is a 4 bolt TVS style (newer design). the old design was a keyed single nut style.
hmmm I will have to look. I bought it used
Old 04-02-2013, 12:50 PM
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here is the other style hub:
http://www.pulleyboys.com/store/prod...&cat=37&page=1
Old 04-02-2013, 02:56 PM
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Originally Posted by Onefast V
cool thank you. I will have to check when I get a chance.
Old 04-02-2013, 02:57 PM
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Keep in mind the warm day dyno being completely dismissed by corrected dyno numbers is also a farce. Your vehicle is going to run cooler in motion than it will standing on the rollers. Maggie cars will also have lower IATs. Neither of these is factored in to the "corrected" number on the dyno. Only the humidity,density,temp of the ambient air and the measurable site variables are in the corrected number.

1% gains are seen for every 10 degree drop in IAT (general rule) at 500hp that's 5hp for every 10 degree IAT drop. That's a pretty significant difference and fast.

Now factor in the well known LS motor sweet spot of engine temp in the low 170/upper 160 range and you've got +/- 10-20 hp than what's being displayed on a hot versus cold day.
Old 04-02-2013, 04:59 PM
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Originally Posted by greddy91
Keep in mind the warm day dyno being completely dismissed by corrected dyno numbers is also a farce. Your vehicle is going to run cooler in motion than it will standing on the rollers. Maggie cars will also have lower IATs. Neither of these is factored in to the "corrected" number on the dyno. Only the humidity,density,temp of the ambient air and the measurable site variables are in the corrected number.

1% gains are seen for every 10 degree drop in IAT (general rule) at 500hp that's 5hp for every 10 degree IAT drop. That's a pretty significant difference and fast.

Now factor in the well known LS motor sweet spot of engine temp in the low 170/upper 160 range and you've got +/- 10-20 hp than what's being displayed on a hot versus cold day.
Where did the high 160-low 170 engine temp number come from? I didn't realize this is well known. Could you comment more on this? seems odd GM would use a 195F tstat if GM knew the engine would run better at 160F-170F


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