Ultimate Supra 2JZ Dyno Turbo Test - Garrett G30 vs G35

Our MKIV Toyota Supra 2JZ-GTE hit the dyno to test turbos, the Garrett G-Series G30 and G35 series turbochargers.

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Speed Academy videos are solely for entertainment purposes. Never perform any modifications to your vehicle that will void your warranty or in any way violate your local road going laws. We assume no liability for property damage or injury as a result of any of the information contained in this video. Use the information provided at your own risk.

[albonfilms]

This legit answered so many questions I've had for years about JZ flow and turbo sizing. Appreciate you guys for getting into the nitty gritty here!!

[johnny_gtr]

For a street car, I'd be setting that G30 on the 1.01 housing - and then mapping in boost by gear, letting it rip in 4/5/6 and reigning it in for 1/2/3.
Would make an awesome street car.

[griffengardner]

I’m seriously amazed how nicely you guys went through all of the data. Thank you for making it so easy to understand and for going to all that trouble just to help educate your audience. What an amazing episode!

[mattmorrison]

Wow, invaluable comparisons there. Especially showing the larger (and better matched) A/R having better response than the smaller one. Would imagine VE tanked across the board and made the engine act smaller.
Fantastic explanations by the tuner as well

[DahakaCL]

30 minutes of pure gold.
Guys, you have here, in your channel everything we need to learn, listen and share. The data followed by feedback is the most precious we human beings can have, numbers without knowledge are useless and this transcends in all professions, hobbies and little things in life even!.

I'm looking forward upgrade my S3 8P as well and i want to maintain as much as possible the throttle response and this video is a HUGE guide to what should i look into it.

[andrewb]

Finally someone making a proper video of testing all the housing garrett turbos are so great loved this vid dont think people are even realising this is minimal power car has a cat and e85 would be a massive jump

[sepg]

G35 + 83 would have been interesting to see.

And when it comes to response, i think Japanese builds are where it's at. Japanese builds rarely go north of 700 hp because they don't use big turbos, and they also focus a lot on suspension tuning.

[FrankBoehler_apex]

This must be one of the most informative videos on the channel. Thanks for doing the research, guys. I'm sure it will save lots of people the hassle of guessing what setup will work best for their needs, with there being as many opinions as people out there. Your findings also seem to confirm the big mystery of the small compressor housing not working as expected on my S13's GT2871R.

[jamest]

Proves what I have been saying for years, a well built engine running a modern turbo always responds better on the bigger turbo, the IAT’s drop, less boost needed and the bigger turbos give better fuel economy.

Another advantage, the big turbos also give a form of boost by gear, in 1st and second engine rpm acceleration means they push slightly less boost which is good for clutches and grip, 3rd gear and up the turbo spool match’s or exceeds rpm gain so you get max power… really enhances the big engine warp speed feel in the car.

Try the two larger turbo sizes on the street and see what you like. Another option is have a switchable map so as the turbos are easily exchanged you could run a smaller turbo on the street and a big boy for the track… But I cannot see you go small now.

[jrbuch]

I love that sound of the turbo spooling up and that deep whistle, combined with that awesome straight six sound. 10/10!

[loete]

Amazing job. Love the content. Nice to have creators that speak to those that enjoy more of the nuances of performance and engineering. You did a good job making it more in depth without being overwhelming. The community needs more of this.

[claudiumxg]

The 0.83 Ar housing should have been tested on G35. That is the sweet spot

[ScottMerrihew]

EARLY SPEED ACADEMY UPLOADS. WHAT YEAR IS IT!?

[g-mane]

I still appreciate this video so much for the 2jz community. Great job guys.

[hpfstrawn]

Finally a turbo sized for normal power and not 1000+ HP! This was an awesome comparison of turbines and housings. I learned a lot from this, very very cool!

[aphex]

So cool seeing you guys work with Franz! Absolute top notch tuner and he makes some really amazing wiring harnesses. I met him back in the day when he worked with the DSG(Dent Sport Garage) guys and it's so great watching him get this kind of recognition.

Great vid!

[EddyEP]

I have the disadvantage of not knowing anything about turbo’s and not having english as my native language but man, I’ve enioyed this video much. Especially the dyno runs, I had my soundsystem on full volume to hear that beautiful music that engine makes❤️

[sjh]

Lots of cool info. Wish we coulda seen the .83 on the g35, but the g30 1.01 was cool too. Good choice fellas thanks for the video.

[Leisure_Suit]

Good choice going with the G30 1.01ar. Perfect street/track setup.

[SupraTT]

Always love your MKIV content! Few notes from experience: 1) The G30-770 is way too small of a compressor at 58mm for a 3.0L 2JZ. Even the 35 series at 62mm is undersized. Boost threshold will be good, but you have to seriously de-tune in the lower rpms due to the quick onset of torque capable of bending stock rods. 58s and 62s will bend stock rods quick even at meager peak hp. You're better off using a larger compressor because you're having to tune out any response capability of these tiny turbos and your dyno graphs reflect this. A 64mm compressor with a .84 or 1.01 AR seems to be the Goldilocks for stock rods and the closest Garrett option is their FP GT3786R-HTA. 2) As for cams, you mention "GSC 272", but they don't make those. :) Their S1s are 269 and their S2s are 274. I forget which you have? Hopefully S1s as S2s are for 71mm+ per even GSC. S2 or even 272s (HKS or BC) only show gains above 8000rpm with noticeable losses below that across the curve with 71mm+. On a 58-62mm it's all loss vs S1 or 264s. Cheers!