MORE POWER? BEST Exhaust Diameters for GR Yaris
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- Опубликовано: 25 июл 2024
- Today we will see what really lies behind the exhaust diameter choice for our G16E-GTS GR Yaris engine! All after LONG and expensive hours of testing, both on road and dyno. Beware of what companies push on you, as mostly it's about their efficiency and returns, NOT the product You need!
Let me know what You think in the comments!
TIMESTAMPS
00:00 - Intro
00:20 - Let's talk power and exhausts!
00:40 - G16E-GTS three cylinder, and it matters
02:00 - Does exhaust diameter count?
03:05 - Truth versus Marketing bullshit
05:08 - The right diameter for each power stage
07:05 - Outro
07:31 - WRC.1 vs Rally.2 GR Yaris exhaust notes
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Always fantastic info....thank you for posts..so single exit the best?
Thankyou Karl! There is another video of mine on this topic: ruclips.net/video/gthrd1Edzdc/видео.htmlsi=njMLzjvUUYkeeMhG
Hi, brilliant videos, thank you. I have a 3”/76mm GPF delete currently leading to the standard backbox. I’m looking to change the backbox and have found a Quiksilver option with a remote valve. This is a 70mm backbox. I am aiming to remap to 340bhp, therefore should I change my GPF delete pipe also to 70mm, or will the current configuration work for me? Thank you
Thankyou for following! In your position, once you have the backbox, I would do back to back testing between the 76mm GPF delete and the Oem GPF, then see what works better. If the OEM part seems better to you, then a 70mm version would be the solution
Hi AJ, thanks for the great info, this just confirms what I noticed with my car on stock exhaust vs my 3 inch system, so on stock exhaust car is very punchy down low in the rev range but chokes past 5000-7000, car is running a mild 360hp map at 1.5 bar boost, with the 3inch it really pulls well past 4500-7000, my aim is 400hp so I think the 3 inch should be ok
You will be ok, just loosing a bit down under mate. Thankyou for supporting!
Another thing is 70mm exhausts are very difficult to find, everyone and thing running on 76mm😆
This is what I’m talking about, but there are various companies that make them like Inoxcar and Scara73
Any idea of TRD and HKS super turbo exhaust system? Thank you
Hello Tany,
The TRD is a very good catback, while remaining civilised. We make something almost the same with Inoxcar, and it works very well. The HKS Super Turbo is very noisy for every day use, you could get fed up with the drone
Hello Adriano,
Thank you for your great informative videos!!!. in certain markets, the GR Yaris comes equipped with a 2nd catalytic instead of GPF. Given this, I believe the impact on performance due to exhaust restrictions might be similar. In your opinion, for someone planning to upgrade their car step by step, would it be better to start with modifying the cat-back or OPF-back system? Or should the first modification focus on removing the GPF or 2nd catalytic?, Thanks for your advice.
Hello Jeorge, thankyou for your question and support!
Untill you go to stage 2 mapping the GPF/2nd kat removal and the main kat replacement with sports version are the only modifications that will actually increase your power. After that, 70mm catback. If aiming above 380hp and larger turbo, 76mm will be necessary
@@AJClubsport Thank you, Adriano, for your quick response, as always very helpful. I hope you'll make a video about the downpipe soon.
My pleasure!
I have a stock GR Yaris, and don't know much about car mods. I get confused a lot when people talk about exhaust, downpipe, OPF, GPF, catalizer... Could you explain it in a future video please :)
Hello Daniel, actually I have this video online, here: ruclips.net/video/gthrd1Edzdc/видео.htmlsi=njMLzjvUUYkeeMhG
@@AJClubsport Thank you, I watched that video, but it was more of a deepdive on one of those types of systems. Maybe something more concise on the basics :)
Ok sure!
Hi Adriano,
Here I am again!, I was wondering, when you refer the diameter of the OEM exhaust is 67mm, is in any particular place of the exhaust or is the complete line after the downpipe?, because I saw some japanese videos of reputable brand where they said that midpipe and the catback(gpfback in Europe) are 70mm, but just after the resonator and before muffler the diameter is 60.5mm, I can only think that Toyota has made different exhaust diameters for each market.
Hello, the european cars have 70 at the downpipe with OPF, then 67.mm that tapers down to around 60mm (for packaging reasons) at the entry of backbox. Ideal diameter is 70mm all the way.
Have a beautiful day!
@@AJClubsport Thanks AJ for addressing my concerns. I appreciate it and wish you all the best.
Hi AJ, for the german market i only find HJS and Bastuck which fullfill the regulations (in 70mm). Which one do you recommend? I read alot about Miltek but its 76mm instead of 70mm. I dont want to change anything besides exhaust/downpipe/airbox for real Sound and deactivate the Sound Generator. Thank you!!!
Hello Jay!
I have seen great things from HJS, but not from the other brand: they should send the parts in for a review!
For sure the HJS can’t go wrong.
Don’t put 76mm exhaust, as you will loose power. This is why we did all the testing for you!
@@AJClubsport thanks again. So I read the HJS is just a little bit louder then the stock exhaust.
Do you know if that means I have to decide between not going to have a power loss (hjs) or sound (miltek for example)?
Thank you very much for your support 😉
@Jay-ck4ed I told you already mate, that on stock turbo you will loose power with Milltek because its 76mm diameter and it just doesn’t work. You need to go for InoxCar or other brands that give you a smaller 70mm diameter.
The increase of noise form HJS is marginal
I have Ragazzon OPF delete in 70mm (they also offer OPF-back exhaust in 70mm). My OPF-back exhaust is non-resonated Bastuck (with E homologation) in 70mm. Works very well. Angry on throttle, but doesnt bother you on normal driving.
My soundcheck if anyone interested:
ruclips.net/video/-W3Oy0BSwJg/видео.htmlsi=rXXihU_Op2hK1zcb
Thankyou for sharing!
What brand are doing 70mm exhaust for the GR?
In Italy InoxCar, in UK C-Tec can make them, also many minor companies
Invidia q300 is the best option for the GR Yaris, it is 70mm and is EGE Approved! Also best build quality !
I haven’t seen one in person
C tec in the UK is good 3"
C tec are friends 👌
Hi Adriano,
I dont understand the question. What your abonnents want to know. It's bullshit to ask, what diameter is the best. Freeflow, no catalizer, no opf or gpf yes 70 Diameter i would say is the best. The problem beginns with the downpipe, also it is able to work with different diameters in the exhaust. Street legal in Germany is an absolute perfekt Mix with full Power, the HJS Downpipe and the Milltek resonated Exhaust with 3 inch. 17 Horsepower this 2 Components is very good. The delete of the opf/gpf is bringing only 1,5 Horsepower more, HJS has tested on the bench flow, means nearly perfekt work from Toyota OEM.
I am talking about flow in the exhaust without Gpf, and if you remove Milltek and put a 70mm tube with the same configuration, you will make much more power across the rev range, maybe see 2-3hp less up on top.
The GPF removal takes a dump of 8-10hp alone, also proven, best mod.
Hjs is a good piece of kit.
Still, all depends at what power point you are
@@AJClubsport o.k. shit here in Germany. Without OPF we can not drive. But fully 70mm open exhaust shure it's enought.
@holgerstoll4682 it doesn’t need to be open, the exhaust: just 70mm all the way and also a sensible back box on standard internal design will work great! I run that, no drone effect and all the power!
There is another video of mine on the types of exhaust systems, it also covers this
bigger not better!? 😅
No, and something tells me you know a lot about it too 😉