AVO turbo kit for BRZ - initial build thread

[2forme]

Originally Posted by AVOturboworld

We will be arranging for that.

Being based on the West Coast, all we generally have access to is 92 octane ethanol blend. We have sourced some 92 octane non-ethanol, and have already started on 93 maps based on that. Even the 92 non-ethanol "pure" gas allows it to run much richer than the 92 ethanol blends, and is giving us much better data points to base the tuning on for the other parts of the country. I'm estimating we've already picked up an additional 10-15whp from the pure gas.

If you guys need someone to test/tune a kit on 93 or even 94 octane, let me know... I have access to both and already have the ECUTek kit/license.

[sw20kosh]

Paul,

I am curious as to why you think the turbo got much "laggier" when looking at the japan gas dyno vs. 91 octane dyno.

I know you were able to be more aggressive with japan gas but does it really make that big of a difference in the low rpms? 1000 rpm difference in spool time? Usually when switching to higher octane I see big increases in the top end, not the bottom end.

For a street kit like this I would almost say it would be better to size a smaller turbo for us here in the US. One that spools at 3k rpms not 4k rpms.

[AVOturboworld]

Gas quality makes a huge difference at any rpm! Especially when you compare ethanol mix gas vs. pure gas. It affects how much timing you can put in at, which effects just how fast it's going to spool up.

But concentrating on that ignores another factor - it's different dyno's. Not different as in different locations/temps, different in that the dyno we use in Japan, a Dynopack, is far more accurate with load than a Mustang dyno, the dyno used in our american run. And the amount of load will directly impact that spool speed. If you look at the Perrin thread, you'll notice they are using a dynopack as well.

On the road, the car would hit peak boost - easily - at 2500rpm in 4th through 6th gear. Even on 91 ethanol-blend octane. That's why we are not worried about a smaller turbo, it's plenty fine at the size it is.

[sw20kosh]

Originally Posted by AVOturboworld

Gas quality makes a huge difference at any rpm! Especially when you compare ethanol mix gas vs. pure gas. It affects how much timing you can put in at, which effects just how fast it's going to spool up.

But concentrating on that ignores another factor - it's different dyno's. Not different as in different locations/temps, different in that the dyno we use in Japan, a Dynopack, is far more accurate with load than a Mustang dyno, the dyno used in our american run. And the amount of load will directly impact that spool speed. If you look at the Perrin thread, you'll notice they are using a dynopack as well.

On the road, the car would hit peak boost - easily - at 2500rpm in 4th through 6th gear. Even on 91 ethanol-blend octane. That's why we are not worried about a smaller turbo, it's plenty fine at the size it is.

Good to know. I am glad it doesn't feel laggy on the road!

[normanb21]

Originally Posted by AVOturboworld

We will be arranging for that.

Being based on the West Coast, all we generally have access to is 92 octane ethanol blend. We have sourced some 92 octane non-ethanol, and have already started on 93 maps based on that. Even the 92 non-ethanol "pure" gas allows it to run much richer than the 92 ethanol blends, and is giving us much better data points to base the tuning on for the other parts of the country. I'm estimating we've already picked up an additional 10-15whp from the pure gas.

I am able to get some 90 non ethanol gas from a station near my home. Would I be able to use this gas with the turbo with one of your maps? I dont have any GOOD tuners near me.

[AVOturboworld]

90 non-ethanol would be roughly equivalent to 91 ethanol blend, so you'd be ok on the 91 maps.

[czar07]

Paul, has any testing been done on 98 PULP in Australia?

[Blue86]

Originally Posted by czar07

Paul, has any testing been done on 98 PULP in Australia?

Our 98 would be equivalent to the Japanese fuel so the original Japanese tune might be ok for us. Otherwise the US 93 octane tune would be about equivalent for our 98 when they finish that off

[BigFatFlip]

@AVOturboworld , been following this thread for a while, checking once in a while, and getting really excited seeing the whole kit come along. One thing I'm really curious about is how the kit change the dynamics of the car. I really like the low position of the turbo, keeping the weight nice and low. I've tried searching the 60+ pg thread with all sorts of key words, but without much luck. How much weight does the kit add? Have you guys done any corner weighting (ie weight distribution front-back/left-right).

Also, how much clearance is there between the kit and the skid plate? I feel like I'd want a thicker plate or some bar to protect the turbo.

[AVOturboworld]

Originally Posted by BigFatFlip

@AVOturboworld , been following this thread for a while, checking once in a while, and getting really excited seeing the whole kit come along. One thing I'm really curious about is how the kit change the dynamics of the car. I really like the low position of the turbo, keeping the weight nice and low. I've tried searching the 60+ pg thread with all sorts of key words, but without much luck. How much weight does the kit add? Have you guys done any corner weighting (ie weight distribution front-back/left-right).

Also, how much clearance is there between the kit and the skid plate? I feel like I'd want a thicker plate or some bar to protect the turbo.

We've not had time to do corner weight, very honestly. It's not adding that much, though - because we are replacing the exhaust manifold + large cat + heat shielding with our lighter exhaust manifold + turbo, the weight gains there are not large. Maybe another 5lbs, and it's in the same location as before. The FMIC will add a few pounds of weight, but thanks to the aluminum construction, is not that heavy. Overall effect to the balance is minimal, honestly.

What does change is how ferociously quick it is. We had a quick 1-2-3 pull with a 400 odd whp turbocharged wagon that is much heavier than the FR-S, and even with us two, uh, chunkies in the front seat + boatload a gear, walked away from him.

I'm also not sure where all this worry about mid-corner histrionics that a turbo is supposed to add to this car. That's a left-over from the old Porsche Turbo days (which, admittedly, could leave a scar on anybodies memories). There's a reason all the top time attack cars are turbocharged (AWD or RWD), and mid-corner throttle modulation is not an issue there.

Forgot to talk about space. The current size turbocharger has quite a bit of space, it's the exhaust manifold that's the closest to the skid plate. About the same as the OEM exhaust manifold in that regard, if you look under there close, it's almost touching the plate as well.

[Bomb3r]

Originally Posted by czar07

Paul, has any testing been done on 98 PULP in Australia?

Going on the info from Lee, I dont think the first kits are in Aus yet, keen to be the first though!

[DriftEightSix]

Originally Posted by AVOturboworld

We've not had time to do corner weight, very honestly. It's not adding that much, though - because we are replacing the exhaust manifold + large cat + heat shielding with our lighter exhaust manifold + turbo, the weight gains there are not large. Maybe another 5lbs, and it's in the same location as before. The FMIC will add a few pounds of weight, but thanks to the aluminum construction, is not that heavy. Overall effect to the balance is minimal, honestly.

So the underbody panels are still there? not sure what you mean by heat shielding.

[Sportsguy83]

Originally Posted by DriftEightSix

So the underbody panels are still there? not sure what you mean by heat shielding.

Yes, the underbody OEM panels are still there. The heat shielding he talks about is that the Cat (and I believe the whole header too) has a heat shield that counts as removed weight when you install the AVO unequal length header.

[MSTiFK8R]

best option to loose weight and avoid fire risk is the ceramic coat instead of shitty heat cloth, which looks like a grandma's pants after a while

I appreciate Paul Hansen is considering this as an option

Cant wait for Stage_2 results!