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Z06 Makes 640WHP on DynoJet

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Old 12-05-2022, 10:58 AM
  #41  
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Originally Posted by marknagy13
And if it had the "right gearing" it probably wouldn't be street legal because of the EPA.... Everyone seems to not figure out that it's the most powerful NA V8 ever... That comes at a fuel efficiency cost. Can't just throw a ton of short gears in there to average 8mpg as much as we'd love it.
Maybe for “the right gearing” for all out performance, but in no way do I believe they couldn’t have made improvements with the gear ratios to better suit this Z06. In the end, it most certainly came down to costs and calculated compromises to meet price targets as it always does at GM.

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Old 12-05-2022, 11:15 AM
  #42  
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Originally Posted by AustinVetter
640 rwhp is incredible. That's over 700hp crank!
Remember, this drivetrain does not have the "typical" driveshaft and u-joints to account for power loss, what you're seeing here reflects a lot less net loss due to the stiffer short sidewall of the tire and nothing between the engine and transmission to absorb rotating losses.
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Old 12-05-2022, 01:32 PM
  #43  
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Love all the bench racers here. Showing absolute disbelief over a 30whp difference between a Mustang Dyno and a Dynojet. This isn't uncommon at all. My C7 read differently on every kind of dyno there was. Always in the same general area, but never expect the same numbers. Mustang dyno's read lower, dynojets read a bit higher. This is common knowlegde in the modifying community.

No, Fabspeed did not spoof the settings for it to read a higher number. They don't care what the stock dyno number is. They are using it to show any potential power gains with their newly developed exhaust system they are R&D'ing. The fact that the baseline run was high is literally meaningless to them so they have 0 reason to engineer a "hero run". To be honest, its probably in their best interest to show lower baseline runs, so they can show their exhaust posting up higher numbers. Not the other way around.

At the end of the day, a dyno is not an exact measurement. It will generate different numbers due to all kinds of different reasons. It's a tool to see power improvements after mods and get a general sense for performance. Cars are going to show a range of whp readings based on many factors so don't read too much into this 30whp difference.
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Old 12-05-2022, 01:43 PM
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Originally Posted by blue_bomber697
Love all the bench racers here. Showing absolute disbelief over a 30whp difference between a Mustang Dyno and a Dynojet. This isn't uncommon at all. My C7 read differently on every kind of dyno there was. Always in the same general area, but never expect the same numbers. Mustang dyno's read lower, dynojets read a bit higher. This is common knowlegde in the modifying community.

No, Fabspeed did not spoof the settings for it to read a higher number. They don't care what the stock dyno number is. They are using it to show any potential power gains with their newly developed exhaust system they are R&D'ing. The fact that the baseline run was high is literally meaningless to them so they have 0 reason to engineer a "hero run". To be honest, its probably in their best interest to show lower baseline runs, so they can show their exhaust posting up higher numbers. Not the other way around.

At the end of the day, a dyno is not an exact measurement. It will generate different numbers due to all kinds of different reasons. It's a tool to see power improvements after mods and get a general sense for performance. Cars are going to show a range of whp readings based on many factors so don't read too much into this 30whp difference.
This was exactly my original point I made in this thread. What matters most is the delta between baseline before the mods, and then after the mods are done. As long as it is the same car on the same dyno, and with the same settings- that is what matters and how the dyno tool should be used.
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Old 12-05-2022, 01:50 PM
  #45  
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Originally Posted by blue_bomber697
Love all the bench racers here. Showing absolute disbelief over a 30whp difference between a Mustang Dyno and a Dynojet. This isn't uncommon at all. My C7 read differently on every kind of dyno there was. Always in the same general area, but never expect the same numbers. Mustang dyno's read lower, dynojets read a bit higher. This is common knowlegde in the modifying community.

No, Fabspeed did not spoof the settings for it to read a higher number. They don't care what the stock dyno number is. They are using it to show any potential power gains with their newly developed exhaust system they are R&D'ing. The fact that the baseline run was high is literally meaningless to them so they have 0 reason to engineer a "hero run". To be honest, its probably in their best interest to show lower baseline runs, so they can show their exhaust posting up higher numbers. Not the other way around.

At the end of the day, a dyno is not an exact measurement. It will generate different numbers due to all kinds of different reasons. It's a tool to see power improvements after mods and get a general sense for performance. Cars are going to show a range of whp readings based on many factors so don't read too much into this 30whp difference.
Both Speed Phenom and Streetspeed were run on DynoJets
Old 12-05-2022, 01:58 PM
  #46  
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Originally Posted by blue_bomber697
Love all the bench racers here. Showing absolute disbelief over a 30whp difference between a Mustang Dyno and a Dynojet. This isn't uncommon at all. My C7 read differently on every kind of dyno there was. Always in the same general area, but never expect the same numbers. Mustang dyno's read lower, dynojets read a bit higher. This is common knowlegde in the modifying community.

No, Fabspeed did not spoof the settings for it to read a higher number. They don't care what the stock dyno number is. They are using it to show any potential power gains with their newly developed exhaust system they are R&D'ing. The fact that the baseline run was high is literally meaningless to them so they have 0 reason to engineer a "hero run". To be honest, its probably in their best interest to show lower baseline runs, so they can show their exhaust posting up higher numbers. Not the other way around.

At the end of the day, a dyno is not an exact measurement. It will generate different numbers due to all kinds of different reasons. It's a tool to see power improvements after mods and get a general sense for performance. Cars are going to show a range of whp readings based on many factors so don't read too much into this 30whp difference.
I agree there is no reason to take a dynojet versus Mustang dyno detour. This thing is actually easier than that. You are premising your comments on Fabspeed not caring about stock dyno numbers. I believe you 110% and then some Fabspeed (the vendor) does not care about stock dyno numbers. Once he has that stock number in 'his pocket' he can make up any power gains he desires.

I bet you at least 60% of the potential customers actually do care about the stock power numbers.
So this is a naturally aspirated 670CHP SAE certified car. Apparently fabspeed is already at 41HP gain (according to some preliminary math) and apparently, he is just getting started so since apparently, he also likes to be the first on many things so how about Fabspeed, first in the world to obtain 60 HP gains on cat deletes alone. Add few little things here and there like let's say headers and voila' 100HP on a naturally aspirated engine just like that....



Old 12-05-2022, 02:03 PM
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Originally Posted by blue_bomber697
Love all the bench racers here. Showing absolute disbelief over a 30whp difference between a Mustang Dyno and a Dynojet. This isn't uncommon at all. My C7 read differently on every kind of dyno there was. Always in the same general area, but never expect the same numbers. Mustang dyno's read lower, dynojets read a bit higher. This is common knowlegde in the modifying community.

No, Fabspeed did not spoof the settings for it to read a higher number. They don't care what the stock dyno number is. They are using it to show any potential power gains with their newly developed exhaust system they are R&D'ing. The fact that the baseline run was high is literally meaningless to them so they have 0 reason to engineer a "hero run". To be honest, its probably in their best interest to show lower baseline runs, so they can show their exhaust posting up higher numbers. Not the other way around.

At the end of the day, a dyno is not an exact measurement. It will generate different numbers due to all kinds of different reasons. It's a tool to see power improvements after mods and get a general sense for performance. Cars are going to show a range of whp readings based on many factors so don't read too much into this 30whp difference.
I would agree with you except that mr fab is in his own thread claiming GM is underrating the power based on these dyno results. Someone who is claiming to be an expert/specialist not understanding what sae certification means would be a little off-putting if I were a customer
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Old 12-05-2022, 02:10 PM
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So many ignorant folks… this is dyno trickery to get clicks. The LT6s are SAE certified. The car has no 1:1 gear so it must be dryno’d in 5th which will falsely show more power unless the dyno is adjusted for it.
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Old 12-05-2022, 02:48 PM
  #49  
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Originally Posted by LowcountryVette
I would agree with you except that mr fab is in his own thread claiming GM is underrating the power based on these dyno results. Someone who is claiming to be an expert/specialist not understanding what sae certification means would be a little off-putting if I were a customer
This underrating BS is arguably the biggest lasting scam concocted in the automotive industry. It's time to put it to bed.


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Old 12-05-2022, 03:42 PM
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So why on earth did Phenoms car trap so low in the 1/2 mile? I timed his car 65-150 and it was 13.0~ seconds. My stock C6 ZR1 does it a full two seconds faster, with a passenger, 3rd gear start. Is it really all down to gearing and aero???

Man GM really needed to get with Tremec for bespoke gearing. How can you use the 458 for inspiration and NOT include the bang bang bang bang short gearing?

This incredible piece of machinery would've been even more incredible if it didn't use the base C8 gearing! Having 3 gears never used is crazy. The whole idea of a high revving flat plane crank V8 is to keep it spinning high.
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Old 12-05-2022, 03:57 PM
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Originally Posted by RapidC84B
So many ignorant folks… this is dyno trickery to get clicks. The LT6s are SAE certified. The car has no 1:1 gear so it must be dryno’d in 5th which will falsely show more power unless the dyno is adjusted for it.
Just like that "oops" inflated Stingray dyno one of the mags posted.
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Old 12-05-2022, 04:01 PM
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Originally Posted by CorvetteFan1953
So why on earth did Phenoms car trap so low in the 1/2 mile? I timed his car 65-150 and it was 13.0~ seconds. My stock C6 ZR1 does it a full two seconds faster, with a passenger, 3rd gear start. Is it really all down to gearing and aero???

Man GM really needed to get with Tremec for bespoke gearing. How can you use the 458 for inspiration and NOT include the bang bang bang bang short gearing?

This incredible piece of machinery would've been even more incredible if it didn't use the base C8 gearing! Having 3 gears never used is crazy. The whole idea of a high revving flat plane crank V8 is to keep it spinning high.
If you have never seen the video why are you making conclusions?
Old 12-05-2022, 04:08 PM
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Originally Posted by Telepierre
If you have never seen the video why are you making conclusions?
No conclusions, just pondering.

I still don't see how it dynos this high with just a straight pipe. As others have said, SAE is a standard.
Old 12-05-2022, 04:10 PM
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These dyno numbers are all over the map. Let me know when they put it on a true electric dyno corrected for temperature and barometric pressure.
Old 12-05-2022, 04:11 PM
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Originally Posted by CorvetteFan1953
I still don't see how it dynos this high with just a straight pipe. As others have said, SAE is a standard.
Lingenfelter claims ~100 hp increase on a Stingray with just an intake manifold and Corsa exhaust so...
Old 12-05-2022, 04:28 PM
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Originally Posted by CorvetteFan1953
No conclusions, just pondering.

I still don't see how it dynos this high with just a straight pipe. As others have said, SAE is a standard.
It doesn't have a straight pipe.... the entire video is the car being dyno'd OEM stock, then a walk-around of Fabspeed's shop, then a teaser clip at the end with sport cats. That's it.
Old 12-05-2022, 04:29 PM
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Originally Posted by RapidC84B
It doesn't have a straight pipe.... the entire video is the car being dyno'd OEM stock, then a walk-around of Fabspeed's shop, then a teaser clip at the end with sport cats. That's it.
Oh, then calling BS 100%, or correction wasn’t set

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Old 12-05-2022, 04:30 PM
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Originally Posted by CorvetteFan1953
Oh, then calling BS 100%, or correction wasn’t set
That's literally what I posted... the car doesn't have a 1:1 gear and most dyno it in 5th w/o adjusting for it.
Old 12-05-2022, 04:31 PM
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Originally Posted by RapidC84B
That's literally what I posted... the car doesn't have a 1:1 gear and most dyno it in 5th w/o adjusting for it.
Ahh I see it now, my apologies. The threads don’t load right on a phone half the time.
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Old 12-05-2022, 04:41 PM
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Originally Posted by JABCAT
Lingenfelter claims ~100 hp increase on a Stingray with just an intake manifold and Corsa exhaust so...

25 for the intake and 19 for the most expensive extreme corsas.

But then again, I have a feeling you already knew that and yet.....

At least next time post the link..? it adds a bit of you know what...


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