Renntech Stage 1 Development/Dyno - 609.7 ps / 806 nm
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2017 Porsche 911 C4
Renntech Stage 1 Development/Dyno - 609.7 ps / 806 nm
Renntech testing their stage 1 M177 software just put down 602 HP and 595 ft-lb torque (609.7 ps / 806nm) 
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2015 C63S / 2015 BMW M4
This is awesome stuff.....! Subscribed for sure.....!
Help me understand -- stock S model peaks at just below 500hp? Did I miss something here?
edit: Nevermind....figured it out.
Help me understand -- stock S model peaks at just below 500hp? Did I miss something here?
edit: Nevermind....figured it out.
Last edited by Iceman II; Apr 18, 2015 at 01:26 PM.
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C204 C250-CDI
And so it begins 
Some of us did say long ago that those sorts of power levels would be easily achieved with just a simple tune alone.
Long term down the track serious tuning is going to net some whopping results, an AWD variant in future would be welcomed
Some of us did say long ago that those sorts of power levels would be easily achieved with just a simple tune alone.
Long term down the track serious tuning is going to net some whopping results, an AWD variant in future would be welcomed
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2015 C63S / 2015 BMW M4
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This is from an engine dyno. It's much more accurate than having to estimate the drivetrain losses when you're measuring at the wheels.
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This particular car(non S model) made 433 rwhp before tuning and 534 rwhp after tuning. Which means these cars are underrated from the factory.
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Reebok
I don't understand, the video shows the car rolling on drums, how is that not measuring rwhp? I mean based on the numbers (600hp) I don't see how the hell it's not crank but my understanding is that getting true crank numbers is extremely expensive because you'd need to remove the engine. What am I missing?
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2015 C63S / 2015 BMW M4
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From: SoCal
2015 C63S / 2015 BMW M4
I don't understand, the video shows the car rolling on drums, how is that not measuring rwhp? I mean based on the numbers (600hp) I don't see how the hell it's not crank but my understanding is that getting true crank numbers is extremely expensive because you'd need to remove the engine. What am I missing?
Are you saying this graph is incorrectly labeled and should be WHP versus BHP? That would make more sense (hopeful and wishing) as it would then show the engine is underrated. At this point, the current dyno just confirms that MB is very accurate with their rating of the engine. The black line (stock) shows its exactly as advertise.
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CORRECTION: Getting word that this is the non-S model. If confirmed, that surely changes how I view the graph. That means the C63 non-S model is pulling over 500 stock and a simple ECU tune places this near 600+.
Last edited by Iceman II; Apr 20, 2015 at 08:48 PM.
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Reebok
Are you saying this graph is incorrectly labeled and should be WHP versus BHP? That would make more sense (hopeful and wishing) as it would then show the engine is underrated. At this point, the current dyno just confirms that MB is very accurate with their rating of the engine. The black line (stock) shows its exactly as advertise.Typically if you put a car on a dyno machine, which this seems to be since the car is sitting on rollers, the output that is measured is indeed rwhp but no way in hell this thing is putting down 600rwhp with just a tune (unless they just cranked up the PSI of the turbos, engine be damned)! So that leaves me with questions...what exactly is happening here?
My best guess is this...they know the car is supposed have X amount of HP from the factory so they run it on the dyno before any mods are done to get a corresponding baseline RWHP. Then they use those two numbers (factory reported HP and their baseline RWHP) to calculate the drivetrain loss. Once they have the drivetrain loss figure, they can guesstimate crank HP on any dyno run they do. Now why you'd do this instead of just using RWHP is beyond me but that's my best guess as to what they're doing.
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Reebok
Ok so it would seem my guess was right, they took a baseline, compared it to factory and calculated drivetrain loss. Now they simply apply that calculated drivetrain loss figure to subsequent dyno runs in order to come up with a guesstimated crank HP. Nothing wrong with that at all, it just confusing there for a bit.
So next discussion...what are they doing? Are they simply upping the boost?
So next discussion...what are they doing? Are they simply upping the boost?
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C204 C250-CDI
