AVO turbo kit for BRZ - initial build thread

[ngabdala]

Yup. 1 day . Anyways, I'm not here to shatter anyone's delusions. I agreed with a fellow forum member. As I said, I want this kit. If you think this is scrutiny go find my posts about the BRZ back in May and June.

I appreciate your opinion and you standing up for what you believe in.

Originally Posted by deucethemoose

1200 mile drive to SEMA =/= street? (technically 2400 miles, as he had to come home afterwards...)
An entire day beating the shit out of it on a track by multiple people and recorded for your viewing pleasure =/= track?


What exactly are you looking for? Lets not beat around the bush here. If you were to post a specific question or request I am sure you will get the answer you're looking for from Paul. He has been nothing but forthcoming and aboveboard here.

[AVOturboworld]

Let's start here:
http://www.nrhsperformance.com/tech_power.shtml

That is to get one area cleared out - all dyno's read flywheel torque, by measuring whp. However, in the dyno sticky in the engine section, all the dyno's don't work the same way. Japan is using a dynapack, and the dynapack works by bolting up to the hubs and simulating load. Due to that, they read, on average, 9-10% higher than a Mustang dyno.

And because it's reading hub, it's calculating the figures differently in the software. For instance, it's seeing 800ft/lb's of torque at the hub in the particular gear selected at the particular rpm. Then it's calculating back from that.

The particular issue is that the "compressed" dyno chart it's making by forcing the torque chart over the whp (calculation) chart is changing the curves. I'll get them to use the split view. But it's still not going to look like a dyno chart from the roller dynos.

And in regards to testing the kit, we tested it for 8 weeks in Japan before we did the American road test and tune. And the drive to SEMA takes 2 days down, 2 days back. We weren't driving at 100mph both ways (talk about math...) and we were reflashing (frequently) which involved a lot of stops.

[buditjoenawan]

Paul,

I disagree with you and NHRS as to the definition of a dyno:

http://en.wikipedia.org/wiki/Dynamometer

ps. It was great chatting with you.

[AVOturboworld]

First, this is my mistake, but Japan posted the graph to show where they reached the max duty cycle on the stock injectors finally. Well, 90% duty cycle at 6.5psi to be exact, which is the furthest they will go and consider it safe. So it was basically incidental that they reached to those figures and power.

Due to the questions here, I went back and talked with them about it, and reached an understanding of what's going on with the power figures. As a side note here, as many people know that Japan doesn't use hp or bhp at the crank, they use PS at the crank for their power figures, which reads a little higher than our hp. Our Japan office is also a Subaru Dealer, and as a courtesy to their customers, dyno's the cars stock for them to verify the power output matches the manufacturer claims. Initially they didn't, but after talking with Dynapack Japan, they ended up with a 1.14 conversion factor for the torque to match up with the manufacturer's data. That isn't applied to the whp figure, though (since the dynapack is using that to generate the flywheel torque), which is why the numbers don't add up.

For instance, at 250whp/6000 rpm, it's showing about 250ft/lbs of torque. As noted, the math doesn't add up. Multiply 250 x 5252 and divide by 6000, and you end up around 218ft/lbs. However, multiply that by 1.14, and you end up with the 249ft/lbs of torque figure on the graph. So the math was wrong, and also slightly right.

To wrap it up, their whp figures are accurate, it's their torque figures that are high. But if you use the dyno as it's intended, a before/after measurement, it's still doing both accurately, it's just that we have a higher start point for the torque (and end point). From now on, whenever they do any testing, they'll run the dyno without the correction figure on the torque output so that there is no confusion on that end.

But for now, the stock power to stage, um, 1.875.


Stage 1 power to stage 1.875.

[Dave-ROR]

Paul, thank you for having them correct that, it'll be a LOT less misleading that way.

[BRZranger]

AVO turbo installed / dynoed before SEMA

[nonicname]

this works better:
[ame="http://www.youtube.com/watch?v=315BAOsePsk"]Drift-Office : AVO TurboWorld 6MT FRS Turbo Kit ~ Stage 1 - YouTube[/ame]

[ft_sjo]

So a 14% fudge factor just to meet the advertised power? So are you saying the dyno is inaccurate or the manufacturer is inflating power figures.. Or perhaps the test method is simply invalid?

[ahaghshenas]

There is another Dyno graph posted up on the BRZ Sports Car Club Facebook page by AVO Japan, the figures and units are different but it seems to work with the math

[sierra]

I sent a pm but no reply so trying the same message here?

I have a Nameless axle back and downpipe with hi flow cat ready for my GTS86 due about Xmas. You mentioned the St 2 tune was the addition of the over pipe and down pipe with HF cat, I assume 2 parts as stock?
That means you must be making 2 versions of the overpipe to suit both LH and RH drive.
Could I purchase a RHD overpipe from you in Australia?

[Sportsguy83]

Originally Posted by ft_sjo

So a 14% fudge factor just to meet the advertised power? So are you saying the dyno is inaccurate or the manufacturer is inflating power figures.. Or perhaps the test method is simply invalid?

My understanding is the 14% fudge factor is to bring the stock numbers back to flywheel numbers. Manufacturer does not advertise Wheel numbers, but Flywheel numbers, so that 14% accounts for the difference between Flywheel power and wheel power.

[Sportsguy83]

Originally Posted by sierra

I sent a pm but no reply so trying the same message here?

I have a Nameless axle back and downpipe with hi flow cat ready for my GTS86 due about Xmas. You mentioned the St 2 tune was the addition of the over pipe and down pipe with HF cat, I assume 2 parts as stock?
That means you must be making 2 versions of the overpipe to suit both LH and RH drive.
Could I purchase a RHD overpipe from you in Australia?

I'd say looking at the fact that they already developed an overpipe for USA (confirming your thoughts that it will be two parts like stock), I would say yes, they will develop one for RHD. (It probably is the same for LHD and RHD).

[sierra]

Originally Posted by Sportsguy83

I'd say looking at the fact that they already developed an overpipe for USA (confirming your thoughts that it will be two parts like stock), I would say yes, they will develop one for RHD. (It probably is the same for LHD and RHD).

The steering column makes the route for the RHD slightly different apparently?
The OEM effort looks like a strangled turd because it can fit both but to get a decent 2.5" mandrel effort each one has to be different. That's my understanding anyway.
AVO are releasing the kit in both countries soon so i'm assuming they made an overpipe for each application?

I could have had the Nameless downpipe with HF cat 'and' the over pipe for another $100 but they knew it wouldn't fit. I know it wont be $100!

[Sportsguy83]

Originally Posted by sierra

The steering column makes the route for the RHD slightly different apparently?
The OEM effort looks like a strangled turd because it can fit both but to get a decent 2.5" mandrel effort each one has to be different. That's my understanding anyway.
AVO are releasing the kit in both countries soon so i'm assuming they made an overpipe for each application?

I could have had the Nameless downpipe with HF cat 'and' the over pipe for another $100 but they knew it wouldn't fit. I know it wont be $100!

Oh I agree with you 100%, that's why Nameless made it different. I am just guessing AVO would be ready to sell this in their land