[celija]

Seems like a waste of money when you can reach the same result by turbocharging a 1ZZ for much cheaper.

 

[celija]

400whp on g16 after bolt on mods.

plus I have yet to hear a person not complain about tuning yet On the 1zz.

They're solid when built correctly. Most people try to cheap out and end up spending more because of the countless problems they create by not doing it the right way in the first place. Ideally, it should start with forged pistons and billet rods. The capability of the person who tunes the car is also very important.

A reliable 1ZZ Turbo costs like $10K for something done properly.

 

[celija]

But turboing a 1ZZ doesn’t get you as much street cred. Admit it, you know you want to be the first guy at your local cars and coffee who can brag that he has the Gazoo Racing motor. 😂 😉

...maybe if street cred helps you sleep at night? Is that you?

Fortunately, I don't care about what anyone thinks and don't have any desire to flex my wallet for attention.

 

[celija]

$10K for a turbo 1ZZ making 400 wheel? What a fantasy. You get that it's an economy engine designed for the Corolla, right?

I bet no matter how many thousands of dollars of forged goodies (if available) you threw at it, the open deck cylinder block couldn't handle 400 wheel.

MWR and DD Performance Research would disagree with you. The open-deck block has never stopped them from reaching those numbers and even more. According to Matt, 400 whp is completely fine with the right internals and tune.

However, 400 whp is reaching the limit of what a stock head can flow on 1ZZ, but it can be done reliably and has been done. If you don't believe me, go ask them. I've had discussions with both Matt and Dave on this subject.

 

[celija]

The bigger issue at 400 whp is that the third/fourth gear won't hold up on C transaxles. Even the final drive, from what I've heard. There are stronger replacements by Kaaz and Jubu to rectify that, but it would add to the cost.

325-350 whp is much safer and more reliable, assuming the transaxle is left untouched.

I don't think it's fair to say this Yaris I3 and transaxle can safely handle 400 whp, either. They haven't been out all too long, so there isn't really long-term information to rely on.

 

[celija]

I want to see dyno of a 1ZZ making 400 to the wheels. And even if it is a thing it'll be a hell of a lot more than 10K to get there. 2ZZ doesn't count the engine is way different.

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Here is one at MWR making about 350 whp at 17 psi. The only reason it's not higher is because Garrett 2860RS limits in flow at around 350-360 hp, as per Garrett's own website. That isn't the limitation of 1ZZ motors, but not all 1ZZ motors are built equally. FED motors found in Celica/Spyder have larger ports and valves. Corolla/Matrix engines will absolutely not reach 400 whp without head work, though Celica/Spyder motors can get around there with the stock head.

It can probably get there on E85 without even using a larger turbo than GT2860RS.

 

[celija]

Either way, I don't see what the point is. 400 whp is just stupid in this chassis and would put the car in the power-to-weight class that is comparable to modern supercars... only they're filled with electronic gizmos and technology to help you put that power down. The biggest difference is that the wheelbase is much smaller than most supercars and would probably be completely bonkers to drive without serious consideration for the traction problems it would have. I honestly think 250 whp is pushing it on this car, let alone anything more than that.

 

[celija]

Revolution (famous for their super light 86 on HotVersion) has made 430hp/470lb-ft with the yaris on stock turbo, stock injectors, stock fuel pump... That motor is silly.

That can't be accurate. The stock turbo is running at 26 psi on Corolla GR or 20 psi on Yaris GR, and those cars are putting anywhere between 230-270 to the wheels based on what I've seen. There's not much left on the table with stock turbo and fuel.

HKS is far more reputable than whoever you're talking about, and they needed a giant turbo running at 40 psi with custom intercooler and new fuel system to reach 400 hp.

It's a cool motor with no doubt. I'd love to own GR Yaris (if we had them in USA), but we need to separate fact and myth.

 

[celija]

I'm not even going to watch the video because it's bullshit.

The well-known Japanese tuning house HKS saw limitations with the stock equipment and felt the need to upgrade many components to reach their power goals. They even added 100 shot of nitrous to the vehicle, which tells me the stock head can flow to at least 500 hp.