How many cars rate HP at the Crank? - Page 3 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Captain Snooze · 10-30-2015, 05:10 AM

Quote:

Originally Posted by jackblack21

One thing that really bugged me was finding out that the real HP of my FR-s is about 174 not 200.

How many cars are rated by the company at the crank? I feel it's kinda fraudulent.

Most manufactures don't measure horsepower at all. They measure kilowatts.

DarkSunrise · 10-30-2015, 09:31 AM

Quote:

Originally Posted by dvasqu01

What's cbe?!?!?

I'll give you the rice noodle😘

CBE = catback exhaust

PureShield · 10-30-2015, 07:38 PM

Quote:

Originally Posted by DarkSunrise

FWIW I made 176 whp with just a CBE on a dynojet (runfiles 1&2).

Edmunds made 173 whp stock on a dynojet as well.

I remember DD Performance in Texas also made 175 whp stock on a dynojet after an ECU reset.

Not sure if it's common or not, but I know a few others have as well.

Dynojets read high, I've dynoed my stock FR-S on a Mustang dyno and it came up to 144whp, Mustangs read low. Were somewhere in the range of 150-160whp.

PureShield · 10-30-2015, 07:49 PM

[QUOTE=Captain Snooze;2436550]Most manufactures don't measure horsepower at all. They measure kilowatts.[/QUOTE

Manly Australia only.

dvasqu01 · 10-30-2015, 08:45 PM

Quote:

Originally Posted by DarkSunrise

CBE = catback exhaust

Young sir it so hard to keep up with these new acronyms these yougns come up with

I'll give you the rice noodle😘

DarkSunrise · 10-31-2015, 10:40 AM

Quote:

Originally Posted by PureShield

Dynojets read high, I've dynoed my stock FR-S on a Mustang dyno and it came up to 144whp, Mustangs read low. Were somewhere in the range of 150-160whp.

In the US at least, Dynojets are the most widely used type of dyno by market share. For that reason I'd say Dynojets are the type most people think of when you say you've gotten a dyno reading done, rather than a Mustang, Maha or Dyno Dynamics dyno. I've even heard that Mustang dynos have a "Dynojet mode" where they try to calibrate to Dynojet numbers since that's what people want.

It's fair to say certain dynos read high or low, but IMO that's really only in comparison with a Dynojet, which has kind of become the industry standard for dynos for better or worse.

Really in the end though, dynos can all be calibrated differently so all that matters is how you do relative to your baseline (and other cars that were tested on your exact dyno). I know in the case of the Dynojet I used, most Twins averaged around 165-170 whp, but my car and another guy I know tested in the 175-177 whp range. Both of our cars were frequently tracked, so that might have helped with the break-in process.

Quote:

Originally Posted by dvasqu01

Young sir it so hard to keep up with these new acronyms these yougns come up with

I'll give you the rice noodle��

Haha yeah I hear ya. I find myself searching on google for acronyms more frequently than I'd care to admit!

why? · 10-31-2015, 03:13 PM

everyone would use crank hp if it was feasible, as it will always be a higher number. That is also why there are dynos that attach at the hubs, more consistency.

Whp can have so man variables in it to be only useful for that particular dyno on that particular day. Plus they can be messed with by techs who know what they are doing, and they are. Some hide sensors in drawers to ruin readings, others do even more shady crap.

raven1231 · 10-31-2015, 04:34 PM

Quote:

Originally Posted by jackblack21

Look not everyone who comes here is a car guy. I never realised that all cars are rated at the crank, now I know.... Chill.

Which is completely fine. You asked a question, and we answered it for you.

rice_classic · 10-31-2015, 06:59 PM

I really got pissed off when I discovered that you were supposed to peel the banana before you eat it.

Does anybody else know this?!! ?!! ?! !?

rice_classic · 10-31-2015, 07:02 PM

All joking aside.

Crank HP is a better rating. Because it measures the power of the engine. So when you're told how much power the engine makes the manufacturer can be more accurate. Once you start measuring power after that (hub dyno, rolling dyno) there's SO many variables at play that can change the figures so giving an accurate number to the public would be like a blind man throwing a dart at a moving dart board.

strat61caster · 10-31-2015, 07:25 PM

Quote:

Originally Posted by Captain Snooze

Most manufactures don't measure horsepower at all. They measure kilowatts.

That's like saying this part is rated for 70 degrees Celsius, NOT 158 degrees Fahrenheit.

10-31-2015, 06:59 PM	#37
rice_classic Senior Member Join Date: Jun 2012 Drives: Nevermorange FRS Location: Seattle, WA Posts: 4,174 Thanks: 757 Thanked 4,208 Times in 1,808 Posts Mentioned: 78 Post(s) Tagged: 1 Thread(s)	I really got pissed off when I discovered that you were supposed to peel the banana before you eat it. Does anybody else know this?!! ?!! ?! !? __________________ SCCA T4 - FRS

10-31-2015, 07:02 PM	#38
rice_classic Senior Member Join Date: Jun 2012 Drives: Nevermorange FRS Location: Seattle, WA Posts: 4,174 Thanks: 757 Thanked 4,208 Times in 1,808 Posts Mentioned: 78 Post(s) Tagged: 1 Thread(s)	All joking aside. Crank HP is a better rating. Because it measures the power of the engine. So when you're told how much power the engine makes the manufacturer can be more accurate. Once you start measuring power after that (hub dyno, rolling dyno) there's SO many variables at play that can change the figures so giving an accurate number to the public would be like a blind man throwing a dart at a moving dart board. __________________ SCCA T4 - FRS

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10-30-2015, 07:49 PM	#32
PureShield Senior Member Join Date: Jul 2015 Drives: 2013 Scion FR-S Location: Vancouver, B.C Posts: 189 Thanks: 139 Thanked 72 Times in 50 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	[QUOTE=Captain Snooze;2436550]Most manufactures don't measure horsepower at all. They measure kilowatts.[/QUOTE Manly Australia only.

10-31-2015, 03:13 PM	#35
why? Only happy when it rains. Join Date: Feb 2013 Drives: series.blue Location: Harnett county NC Posts: 1,995 Thanks: 5,698 Thanked 1,265 Times in 750 Posts Mentioned: 26 Post(s) Tagged: 0 Thread(s)	everyone would use crank hp if it was feasible, as it will always be a higher number. That is also why there are dynos that attach at the hubs, more consistency. Whp can have so man variables in it to be only useful for that particular dyno on that particular day. Plus they can be messed with by techs who know what they are doing, and they are. Some hide sensors in drawers to ruin readings, others do even more shady crap.

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