Stock IHI VF35 Turbo vs Aftermarket TD05-20G - Speedo Time Comparison with Datalogs :: Subaru STi

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You can see here an acceleration comparison between the stock IHI VF35 turbo and the aftermarket china TD05-20G turbo. I recorded the speedo and measure the time over the videoframes. Not the most accurate measurement but you get the idea.
Overall the TD05-20G combined with the aftermarket exhaust system gives you more horsepower, less turbo lag compared to the stock setup.
Video-Chapters:
0:00 : Intro
0:23 : Stock Setup @ 1.05 bar
0:48 : Stock Setup @ 1.20/1.15 bar
1:12 : Stock Setup @ 1.30/1.15 bar
1:35 : Stock Setup @ 1.30/1.15 bar (LC)
1:57 : Tuned Setup @ 1.10 bar
2:16 : Tuned Setup @ 1.25 bar
2:36 : Tuned Setup @ 1.40 bar
2:53 : Tuned Setup @ 1.25 bar (LC)
3:13 : Tuned Setup @ 1.40 bar (LC)
3:46 : Stock vs Tuned Setup (Direct Comparison)
I did the following tests:
60-160 km/h
80-140 km/h
80-160 km/h
100-150 km/h
0-50 km/h
0-80 km/h
0-100 km/h
0-140 km/h
Car Specs:
- TD05-20G (China)
- Maxspeed Turbo-Back Exhaust System with 200 Cell Cat
- ECU is tuned (LC) + Boost controlled with EVC Boost Controller IV (1.1-1.2 bar in this video)
- STi GeNome Defi gauges
- AEM Wideband Failsafe AFR Gauge
- Walbro 255 Fuel Pump (with stock injectors)
- Unequal Length Header (original)
- Stock EJ207
- 98 Octane Fuel
Data Logging Parameters (logged with RomRaider from ECU):
- Mass Airflow (Graph red)
- Manifold Relative Pressure / Boost (Graph blue)
- Engine Speed
- Engine Load
- Ignition Total Timing
- Feedback Knock Correction
- Fine Knock Correction
- Intake Air Temperature
- Throttel Opening Angle
- Injector Duty Cycle
- Vehicle Speed
Recorded with a GoPro Hero HD 1
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Please rate and comment!
More videos come!

[@SubiCarLous]

Video-Chapters: 0:00 : Intro 0:23 : Stock Setup @ 1.05 bar 0:48 : Stock Setup @ 1.20/1.15 bar 1:12 : Stock Setup @ 1.30/1.15 bar 1:35 : Stock Setup @ 1.30/1.15 bar (LC) 1:57 : Tuned Setup @ 1.10 bar 2:16 : Tuned Setup @ 1.25 bar 2:36 : Tuned Setup @ 1.40 bar 2:53 : Tuned Setup @ 1.25 bar (LC) 3:13 : Tuned Setup @ 1.40 bar (LC) 3:46 : Stock vs Tuned Setup (Direct Comparison)

[@shredder8910]

Clearly shows the difference between PSI and CFM. Boost is just a measure of intake restriction at the end of the day

[@boostfeed_]

Really cool video, love all the data you put in

[@OGbrundle]

You're a brave soul doing pulls like that with little to no gas in the car

[@SubiCarLous]

I have multply safety features like the lambda gauge that blink red when the AFR is in a not safe region under boost and a lot of ECU stuff that caps the power. Also the run out of fuel happen mostly at long corners with high G. However, I personally never had experienced that problem.

[@bingoberra18]

Great video! The 20G really picks up early!

[@markokrstic5039]

Thank u mate

[@Lucas-nz8em]

Subscribed. Def a big difference from my former vf48 to my current 20g xtr.

[@Sumzorrr]

And might one ask at what rpm does the 20g xtr spool ? Asking this because I'm looking to replace my vf48 and I'm anxious about spool

[@Pestazio]

Sehr nicer Vergleich!

[@dknight2585]

Good solid comparison, thanks. On road footage of the 20g? Searching now.

[@AmirPomen]

Perfect comparison that i need...

[@harisb7862]

epic video. thank you.

[@ricardolee461]

Dam good shifting

[@slowdime5585]

great information

[@peetymcfly8871]

very good video. 20g clearly the winner.

[@Zxz18]

cool video

[@siriansight]

Mate. Thank you. Literally exactly what I have wanted to see / hear / log for years I have an 05 STi w vf35. Thinking of going flex fuel with TDo5-20g 7cm. Was wondering what response I might lose in the mid range

[@mattswank]

If you have a 2.5L get at least a 8cm hot side. The 7cm will be too restricted

[@siriansight]

Thx broski Im Aussie, here our o5s are jdm ej207 😎

[@Namesakes.unit-x-10sq10]

Did you get the 7cm2 or 8cm2 hot side? Really liked how it responded in the video, i have a EU spec sti that needs to rip the M3's as well😝

[@SubiCarLous]

😁it's 7cm²

[@Offensiveword]

This is exactly what iv got (vf35) running 350bhp so think I’m gunna go for the td 05 now and up that Bhp a bit orrrr even a td06 ? I’m not sure tho

[@antikristuseke]

Injector upgrade up next? Looks like you are on 100% duty cycle at 1.4 bar, or is that something of a spike in logging at gear shifts?

[@SubiCarLous]

Yes, the logs often shows over 100%. In the previeos videos you can actually see that the injectors are not able to deliver the right amount of fuel. It should be the next reasonable upgrade (or higher fuel pressure) but I think I will just try to tune to leaner AFR first because at the moment the leanest AFR is at about 11 AFR so it's still enough fuel. Of course the injectors will not like it for too long and also the tuning is harder because they stay open and the fuel amount controlling is bad.

[@juancarlosdelrio486]

what kind of fuel are you running? great video by the way!

[@SubiCarLous]

Thx! It's 98 octane fuel.

[@juancarlosdelrio486]

@@SubiCarLous that makes sense! I was like thats alot of timing but all I have around here is 91

[@cody0]

@@juancarlosdelrio486 it's 98 Ron which is equivalent to about 93 octane. Different measurements.

[@user-wy8ux8mp2c]

Спасибо за тест и данные

[@panluki]

How would you compare drivability of both turbos in real life? Which is more laggy when you press gas pedal?

[@SubiCarLous]

The TD05-20G is definitely better in every way with my setup. Better response/spool up and more torque over the hole rpm range and also very constant torque. It feels more agressive and hit faster and harder then before. Actually I was very suprised that it perfoms so well.

[@isabreezy9429]

Hey mate im new to the tuning side of things, im looking at putting a GTPS02-712 uses a TD05H turbine with a 7cm or 8cm housing and 712GTP compressor wheel. Comes with Turbosmart actuator. For all Subaru WRX/STi MY1997-2005 would this be similar to yours

[@SubiCarLous]

It's hard to say. I saw some dyno sheets with E85 fuel and it performed worse. If you are new in tuning I would suggest to buy a china turbo and learn with that first (under 200 bucks). Or check out the mamba turbos. The build quality looks really nice and they are not so expensive as the GTPS02-712. I will be one in the future and test it.

[@makonsoojakidd2338]

Question, what are your thoughts on changing a subaru twin scroll turbo exhaust housing and replace it with a single scroll housing or vice versa?

[@SubiCarLous]

So I just love the boxer sound so I have to stay with the single scroll housing + unequal header. I don't have a comparison to a twin scroll but theoretical it should give you a better spool up. But also people say that an equal length header alone should give to a better spool up or overall perfomance. I tested an unequal vs equal header (with a single scroll turbo) and I was not able to measure any differences (only street data logging and GPS measurement). The equal length header is bigger and heavier with the same material. So if you want the typical boxer sound you need the single scroll housing but if you just want max perfomance then the twin scroll should be better.

[@makonsoojakidd2338]

@@SubiCarLous so do you think that the twin scroll turbo back housing can be removed and fit a single scroll back housing on to it?

[@SubiCarLous]

@@makonsoojakidd2338 I don't know why it should be not possible. You just need new headers and maybe also another downpipe.

[@makonsoojakidd2338]

@@SubiCarLous thanks for the advice bro 🙏

[@mattswank]

@@SubiCarLousthe benefit to equal length is less heat on Cylinder 4 and at higher hp numbers to remove any and all restrictions as possible. But I agree, the rumble is life.

[@aftastosk6016]

It's very impressive that with the cheap max speeding rods turbo you got that results. What is most impressive is the power and torque curve. And yet there are still people that are debating against Td05s

[@SubiCarLous]

The most stuff you can buy is from china (and it's often really not bad quality wise) and a lot of that is just labeled and sold with a company name somewhere else. So same product but a lot more expensive. Only the warranty is a problem but at that price you could take the risk in my opinion. But also a lot of local products looks cheaper and are worse then the china ones...

[@aftastosk6016]

@@SubiCarLous I didn't have in mind the manufacturing quality of the MaxSpeedingRods turbo (which seems good enough) but the performance. The design of the compressor wheel seems that is the same with the original 20G cast wheel (Mitsubishi itself has revised it at least twice). Even if we take into account that in this case is a faithul reproduction (the chinese copies generally tend to be heavier than the original) then the final results (total boost pressure, spool time, power and torque curve) are very impressive. I cannot imagine the performance of a more expensive and advanced derivative with a modern design billet compressor, improved internal bearings (they sell them now with totally revised thrust 360' bearing or ball bearing) and newer design turbine (they are offered with a totally revised 12 blade, 11 blade, 9 blade and recently a 5+5 blade). Basically, my comment was a praise for the Td05H.

[@arturogonzalez4126]

I'm looking for a good source for a 20g Turbo Map, do you mind sharing where you got yours?

[@SubiCarLous]

I tuned it completly myself over feedback loop: You change some stuff and look to the sensor data. If they look good push more. Of course u have to learn how to read/flash ecu and so on and other main stuff. Maybe I should do a tutorial for subaru tuning in future?

[@akira5982]

​@@SubiCarLousdo it bro, be nice to learn how to do a bit of road tuning, tunes in australia start at over 1k & gets a bit cheaper the more u go but it still adds up pretty quick when u like to change things 😅

[@schoolvaassen1958]

Kind of hard to say if the the car was stock with vf35. The car tuned with the vf35 could maybe keep up with the tuned td05... 😅

[@SubiCarLous]

Why it's hard to say? In the video it says "stock setup" and it means also that. Only ECU tuned for different boost setups. You can even hear it. I tested also the VF35 with the same aftermarket exhaust system that I'm using with the TD05 but never recorded it properly. You will get about 330-340 hp so not near to the TD05.

[@rebel.mma.youtube]

If only the 5speed could handle thos power then 0-100kph be so good. 6 speed such short gears. I have a 6 speed to go in my car when I build but I not decided on turbo yet.

[@SubiCarLous]

Or you have to raise the rev limit. With about 8000+ rpm you should reach 100 km/h with 2. gear 6 speed. The stock EJ207 will handle it and also I read that people done this on the EJ205 for years and nothing happen but for the 2.5l engines it will be too much in my opinion. You need a build motor then.

[@rebel.mma.youtube]

@@SubiCarLous thank you so much. Yeah then have to gey a perfect turbo to get that 100kph. So power all the way to to 8k revs? yeah I understand the sti 207 twin scroll ones read line 8k. The 5 speed hits the 100kph at just 6.3k revs so if only it could handle more or could get the car to 1000kg in body weight then would have such a quick car. I only care about 0-100kph 1/4 mile I'd get a different car with areo dynamics. Thanks for heads up on rasing revs

[@sebastianmiticky2491]

why you hiding your milage ?

[@SubiCarLous]

For a funny reason that I can't tell you 😂

[@endahwulandarise4756]

Endah.

[@bjornsama9649]

I love Subaru for the rumble. but the powerband is not great at all. great torque. but dies at the top. I went back to my Hondas. fk8.

[@SubiCarLous]

It depends on your setup. The Subaru OEM tunes are really like you descripe but with a bit of ECU tuning and some supporting mods it's another story. Especially the EJ207 engine is very good at the top end.

[@SubiCarLous]

This could be the sound generator from BMW that creates some sort of rumble.

[@aftastosk6016]

@Floyd1504 your sound is fake his sound is real.