Circuit Motorsports Tuned Stock BRZ: +17whp & +12wtq

[Circuit Motorsports]

Originally Posted by Aleksander

Hi, i have a quick question

I know atle and Andreas from the Norwegian forum, and it sounds very convincing with your custom tune, the thing is i live at Svalbard and we have snowy roads until may/june, can i buy the EcuTek stage2 tune now and start the tuning in the summer?

Also i was thinking of getting me a full exhaust inc a catted header before i start tuning, and if it will add even more power i'm willing to get a new intake, maybe perrin? or whatever is the most cost/performance effective

You could go with our Stage 2 tune now and we could fine-tune it this summer. My base map will run your car better than the stock tune (think off-the-shelf tune), it is still conservative but you will have gains and the car will run smoother than stock as it is an overall improvement across the entire rpm range including part-throttle and full-throttle operation.

I have only seen a very small power increase on the top end of the rpm range with a properly tuned aftermarket intake. The stock intake with a drop-in filter is quite good. I understand some have reported a slight power increase at high rpms with the stock intake by modifying the snorkel part of the stock intake (removing an airflow restriction).

Having said that, the Perrin intake is a really nice intake and tunes very well (accurate), with good, even airflow.

I've PM'd you some details.

- Bob

[R.S-HawK]

3rd PM Sent, still awaiting follow up.

[Circuit Motorsports]

Originally Posted by R.S-HawK

3rd PM Sent, still awaiting follow up.

Just sent you the full quote

[w00t692]

Originally Posted by mad_sb

That almost works.... except that if the dyno is calibrated to read higher the gains will also be skewed by the same percentage as the baseline.... so if the baseline is skewed by 10% the gains are also skewed by 10% etc etc

Doesn't work this way. Gains are absolute, not percentage based

The engine makes what it makes as a baseline, and it makes what it makes after tuning. There's nothing there to skew the numbers.

What you're suggesting is that the baseline and final numbers are related by a percentage, and that's simply not true.

[atledreier]

Ok, consider the extreme example:

You have a dyno that reads VERY low, it reads the baseline peak whp as 100hp. After some Bob-lovin' the engine output 5% more, so the peak hp is now 105hp, 5hp gained.

So you're saying that if I take the same car on a dyno that reads high I will see the same absolute gains? So it reads 200whp stock, 5hp power gain, and the gain is now 2,5%. So I made 5hp by driving to the other shop? Or did I lose 5hp on the first dyno?
Does dyno still not matter for absolute gains?

By the way, latest low-rev wizardry by Bob is awesome! :-)

[Circuit Motorsports]

Originally Posted by atledreier

After some Bob-lovin'


By the way, latest low-rev wizardry by Bob is awesome! :-)

I lol'ed at this

-Tristan

[Andreas83]

Originally Posted by atledreier

By the way, latest low-rev wizardry by Bob is awesome! :-)

I am really looking forward to test the changes at low-revs that Bob has added to my latest revision of my tune.
Will flash my car at the heliport when I get back onshore.

[w00t692]

Originally Posted by atledreier

Ok, consider the extreme example:

You have a dyno that reads VERY low, it reads the baseline peak whp as 100hp. After some Bob-lovin' the engine output 5% more, so the peak hp is now 105hp, 5hp gained.

So you're saying that if I take the same car on a dyno that reads high I will see the same absolute gains? So it reads 200whp stock, 5hp power gain, and the gain is now 2,5%. So I made 5hp by driving to the other shop? Or did I lose 5hp on the first dyno?
Does dyno still not matter for absolute gains?

By the way, latest low-rev wizardry by Bob is awesome! :-)

To find out, why don't you find 2 dyno's that read 100% different first and you can answer your own question.

The simple answer is if you gained 5 horsepower on one dyno, you should gain 5 horsepower on another dyno. It's simply measuring a difference in torque at the tires.

Whether one reads your torque at 150 ft/lbs and the other reads it at 140 ft/lbs, the difference should result in a 5 horsepower gain regardless.

the amount of differences the guy was arguing about anyways are within the range of dyno error tbh... Pointless really.

[atledreier]

We're arguing the principle, not the numbers.

Besides, if your two dynos read the torque at the same rpm (likely) then one would read a higher hp number than the other, that's simple mathematics. If we for simplicity say that the peak torque occur at 5252rpm, then one will read 140hp and the other will read 150hp, no matter what you call it. If one read 130 and one read 150 there's a different percentage gain on the SAME engine.

[w00t692]

Yes but that's not the dyno's fault, that's the dumbest argument ever. If that's what you're saying... WHO CARES.

What one dyno shows vs another dyno, the point is to get your gains from one mod to the other. Arguing about how the dyno shows those gains is insanely stupid.

This is like arguing about who has more money, the guy with a dollar or the guy with 13 pesos.

See what i mean?

What i'm saying is, why would you bother arguing this, these numbers are from a mustang dyno anyways, there's not much way to tamper with it.

[atledreier]

Of course, as long as you stay on one dyno you can argue your point.

My point is, if dude #1 has a tune and goes on a dyno and get 4hp gain. and dude #2 goes on another dyno with a different tune you might as well compare apples to coconuts. Not even the gains are comparable.

[Circuit Motorsports]

To get this thread back on track here's a video of a Local BRZ we tuned and added in our custom Launch Control feature. Oh and we installed a sweet Tomei Titanium 60s too

[ame="http://www.youtube.com/watch?v=NpZo2hLhGHY"]Tomei Expreme 60S Exhaust - 2013 Subaru BRZ - YouTube[/ame]

[atledreier]

Sounds nice. Not a fan of single exits for this car, but power is power! :-)

[Aleksander]

Nice sound, can't wait to get my tune with launch control and of course the exhaust, hopefully all the way from the engine

Originally Posted by atledreier

Sounds nice. Not a fan of single exits for this car, but power is power! :-)

http://ft86speedfactory.com/ft-86-dr...lete-1299.html

They have a cover for both sides
But then again, it will look better with the dual exit like the stock exhaust imo.