BRZ / FR-S Boxer Engine Dyno Powerband revealed

[ahausheer]

This is about as good a hp graph as you could hope for. I don't mean total power, but in terms of power delivery this is very nice. Cant wait to see how aftermarket bolt ons change things, my guess is that this engine is very very efficient and bolts on's will not do much.

[carbonBLUE]

Originally Posted by bambbrose

Freehand bitches :happy0180:

One is at wheels and the other is at crank. Can't compare, so I did it with 15% loss


yellow and purple are best guesses.

midrange torque is dramatically improved.

Its a good enough guess, ty
Power delivery is much better, its better than a stock gts, that's all I was hoping for, i'm 100% sold now

[SUB-FT86]

Once that area(3200-4800) gets fixed this will be my favorite 2.0 liter engine. I wish my RSX made almost 100% of torque from 3k to 6.5k.

[ahausheer]

Originally Posted by SUB-FT86

Once that area(3200-4800) gets fixed this will be my favorite 2.0 liter engine. I wish my RSX made almost 100% of torque from 3k to 6.5k.

I doubt that area will get fixed without sacrificing something significant elsewhere. We have not just magically stumbled upon something that toyota and subaru missed.

[Buggy51]

So... if anyone's willing to explain in layman's term. Is this a good or bad graph? I have no idea what I'm suppose to look at lol

[tranzformer]

Originally Posted by Buggy51

So... if anyone's willing to explain in layman's term. Is this a good or bad graph? I have no idea what I'm suppose to look at lol

It is about area under the curve. Overall looks good but as others mentioned a few areas like 3200-4800 need some work. Flat torque is king so is area under the curve. Not so much peak numbers persay.

[serialk11r]

Originally Posted by Buggy51

So... if anyone's willing to explain in layman's term. Is this a good or bad graph? I have no idea what I'm suppose to look at lol

It's rather impressive considering that it is a fixed cam profile. Very flat from 5000-7000, which is where you'll be if you're revving it. Also it's pretty remarkable that they are able to get so much torque at 3000rpm when the cam is "optimized" for 6000rpm.

The likely explanation for the dip is the intake tuning, a more sophisticated variable intake would help but that would be rather difficult to come up with.

[carbonBLUE]

Originally Posted by Buggy51

So... if anyone's willing to explain in layman's term. Is this a good or bad graph? I have no idea what I'm suppose to look at lol

its really good for a 2L 4 cylinder engine that has no valve lift or extremely aggressive cams, gas mileage is also beyond expectations, they did a very good job

valve lift is noticed in the graph i posted with the jump in hp at 6200 rpms..

[ahausheer]

Originally Posted by serialk11r

It's rather impressive considering that it is a fixed cam profile. Very flat from 5000-7000, which is where you'll be if you're revving it. Also it's pretty remarkable that they are able to get so much torque at 3000rpm when the cam is "optimized" for 6000rpm.

The likely explanation for the dip is the intake tuning, a more sophisticated variable intake would help but that would be rather difficult to come up with.

Lexus already has a more ''complex'' variable intake, its not that complex, just more expensive maybe a little larger/heavier.

[serialk11r]

The issue would be tuning one and figuring out control systems for a car that doesn't come with it from the factory...can't just transplant a Lexus system over when it's made for an engine with much more displacement.

[ahausheer]

Originally Posted by serialk11r

The issue would be tuning one and figuring out control systems for a car that doesn't come with it from the factory...can't just transplant a Lexus system over when it's made for an engine with much more displacement.

There is nothing to tune, other than activation point, on these variable intakes, they are either open or closed. We can only hope that MPG and noise constraints left a few HP to be ''unlocked''.

[serialk11r]

Uh, what do you mean nothing to tune? I don't think Lexus has any 2L engines that you can just pull the intake off and move over. The pipes will be incorrectly sized if you do.

And yes they are either open or closed, but you have to have a separate controller because the ECU doesn't know what to do with a 3 stage intake.

[ahausheer]

I see what you mean. I thought you were referring to tuning Toyota variable intakes in general. I think it would be near impossible to use a three stage intake without spending huge amounts of money and making one off parts to adapt the system.

[Levi]

Here is some graph of the intake I think. Don't know what is it about but maybe there could be some relation between both this graph and the dip in torque.