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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 04-21-2012, 05:45 AM   #1
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engine dyno!

Not bad....
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Old 04-21-2012, 10:26 AM   #2
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WTH - that can't possibly be WHP/WT. Is the graph an estimate of crank readings? Even if it is, the torque value is still way too high. Looking forward to some expert commentary on this.
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Old 04-21-2012, 11:05 AM   #3
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that torque graph looks terrible
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Old 04-21-2012, 12:18 PM   #4
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that torque graph looks terrible


Ummm look at the scale.
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Old 04-21-2012, 12:19 PM   #5
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Agreed. Doesn't make any sense. Seems like we get 1100 wasted rpms too. Unless scaling is off somehow.
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Old 04-21-2012, 12:21 PM   #6
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Is this an actual engine dyno or a normal Dynapack hub dyno converting.
@Scion FR-S: engine dynos measure crank not wheel hp so it would represent the curve associated with the manufacturers numbers.

As for the shape, the scales are just different it's not as wild as it looks.
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Old 04-21-2012, 01:20 PM   #7
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Is this an actual engine dyno or a normal Dynapack hub dyno converting.
@Scion FR-S: engine dynos measure crank not wheel hp so it would represent the curve associated with the manufacturers numbers.

As for the shape, the scales are just different it's not as wild as it looks.
dynapack hub dyno converting, i was drunk and uploaded it last night... lol but those peak tq numbers look good, dip looks like it was for fuel economy...

from the tq numbers it looks like it was designed not to be a dog around town at stop lights(been in a brz and it isnt a dog whatsoever) that dip from 3-4k looks like accelerating fuel economy, 4k to redline looks like performance in mind
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Old 04-21-2012, 01:24 PM   #8
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So why is peak torque showing at 15 lb-ft over rated? Makes no sense.
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Old 04-21-2012, 01:29 PM   #9
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Originally Posted by Scion FR-S View Post
So why is peak torque showing at 15 lb-ft over rated? Makes no sense.
Because it's a conversion it has to estimate the losses from the flywheel to the dyno.

(It's not an actual engine dyno graph.)
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Old 04-21-2012, 01:31 PM   #10
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So why is peak torque showing at 15 lb-ft over rated? Makes no sense.
inside line got 143 tq to the ground, 165-170 crank tq est is expected the hp is spot on though

real specs of the engine are ~200 crank hp and ~169 tq and not the 200hp 151 tq advertised, which is a good thing,

kinda like how fords mustang brochure says 412 hp but they dyno in at 398 whp... there's a lot of cars out there under/overrated on hp and tq

and this...
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Because it's a conversion it has to estimate the losses from the flywheel to the dyno.

(It's not an actual engine dyno graph.)
but i think its good enough estimate....
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Old 04-21-2012, 01:46 PM   #11
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So why is peak torque showing at 15 lb-ft over rated? Makes no sense.
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Originally Posted by carbonBLUE View Post
inside line got 143 tq to the ground, 165-170 crank tq est is expected the hp is spot on though

real specs of the engine are ~200 crank hp and ~169 tq and not the 200hp 151 tq advertised, which is a good thing,

kinda like how fords mustang brochure says 412 hp but they dyno in at 398 whp... there's a lot of cars out there under/overrated on hp and tq

and this...


but i think its good enough estimate....
What's funny is I've written PAGES of posts in the Engine Tech thread about how I think this engine should have 170+lb-ft of torque based on comparisons to the old 3SGE BEAMS motor and the D4-S gains on the 2GR. Compression ratio, fuel mixture, intake velocity, BMEP were all considered...

Would be nice to be vindicated, but can't take it from a conversion. Soon maybe.
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Old 04-21-2012, 01:55 PM   #12
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Proving tq estimates
across engine styles and brands is guesswork or mishandled information. I too would like to see nonconverted figures though.
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Old 04-21-2012, 01:58 PM   #13
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Proving tq estimates
across engine styles and brands is guesswork or mishandled information. I too would like to see nonconverted figures though.
yeah Cobb tuning plano should be getting or already has their brz, hopefully they will do some engine dyno testing
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Old 04-21-2012, 02:01 PM   #14
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Proving tq estimates
across engine styles and brands is guesswork or mishandled information. I too would like to see nonconverted figures though.
Yeah. The high torque on the chassis dynos could come from efficiency improvements in the drivetrain, which is where a lot of development will be spent since those gains can be applied to fuel efficiency gains in ordinary cars too.
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