12 Hole Injector Upgrade Tested!
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Former Sponsor
Joined: Sep 2016
Posts: 107
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From: CO
12 Hole Injector Upgrade Tested!
With the help of the forum ( a fellow enthusiast forum) community, we were finally able to test the 12 hole injector upgrade. See the video below.
I haven't seen this pop up on the GX forum much, but it's hotly debated in the other models that use the same 2UZ.
As far as I can tell we were able to produce the most complete set of data related to this topic to date. I've still got all the logs and dyno charts so we can dive into anything else people want to see in this thread. I'm happy to share the data via Google Drive as well. I'll try to get that setup soon.
HINT: There's a bonus at the end that's going to ruffle some feathers. It relates to engine air filters...
I haven't seen this pop up on the GX forum much, but it's hotly debated in the other models that use the same 2UZ.
As far as I can tell we were able to produce the most complete set of data related to this topic to date. I've still got all the logs and dyno charts so we can dive into anything else people want to see in this thread. I'm happy to share the data via Google Drive as well. I'll try to get that setup soon.
HINT: There's a bonus at the end that's going to ruffle some feathers. It relates to engine air filters...
Lead Lap
Joined: Feb 2014
Posts: 3,657
Likes: 818
From: NC
SPOILERS AHEAD! Watch the video first!
Super nice test.
I'm not really surprised by the no-difference with the injectors. Especially since the 2UZ is port injected not direct injected (as the tech said - once the mix hits the back of the intake valve, any extra atomization becomes worthless.
I'm actually very surprised that the K&N didn't flow better. It's certainly got a more open weave than paper (..which lets more debris through) so you would intuitively expect it to flow better. I suspect there are other factors limiting flow - like the constriction by the MAF and the throttle.
Chip H.
Super nice test.
I'm not really surprised by the no-difference with the injectors. Especially since the 2UZ is port injected not direct injected (as the tech said - once the mix hits the back of the intake valve, any extra atomization becomes worthless.
I'm actually very surprised that the K&N didn't flow better. It's certainly got a more open weave than paper (..which lets more debris through) so you would intuitively expect it to flow better. I suspect there are other factors limiting flow - like the constriction by the MAF and the throttle.
Chip H.
Thread Starter
Former Sponsor
Joined: Sep 2016
Posts: 107
Likes: 14
From: CO
SPOILERS AHEAD! Watch the video first!
Super nice test.
I'm not really surprised by the no-difference with the injectors. Especially since the 2UZ is port injected not direct injected (as the tech said - once the mix hits the back of the intake valve, any extra atomization becomes worthless.
I'm actually very surprised that the K&N didn't flow better. It's certainly got a more open weave than paper (..which lets more debris through) so you would intuitively expect it to flow better. I suspect there are other factors limiting flow - like the constriction by the MAF and the throttle.
Chip H.
Super nice test.
I'm not really surprised by the no-difference with the injectors. Especially since the 2UZ is port injected not direct injected (as the tech said - once the mix hits the back of the intake valve, any extra atomization becomes worthless.
I'm actually very surprised that the K&N didn't flow better. It's certainly got a more open weave than paper (..which lets more debris through) so you would intuitively expect it to flow better. I suspect there are other factors limiting flow - like the constriction by the MAF and the throttle.
Chip H.
The K&N was a shocker. The K&N NEW seemed to flow worse than my OEM paper filter that's old. The dyno operator (owner) was not surprised in the least. Seemed like he'd seen that many times before. He also mentioned how filtration is what really matters and silica contamination in the engine should be a top priority.
Agreed the filter probably isnt the main restriction. If it was, Toyota could have simply made a larger box for the filter. I'm sure it was sized very intently to provide zero/minimal restriction.
Mighty car mods did a test long ago and they showed that the stock airbox was always better unless you modify the engine to make significantly more power than factory. Also pod filters always make less power. This was a great test though and I think everyone appreciates thoroughly researched and vetted content like this. Good work!
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