Experimenting with injector angle timing - what works best?

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Experimenting with injector angle timing - what works best?
Now that my tune is mostly complete, I thought I’d experiment with different injector angles. Rather than jump into randomly changing injector angle timing I thought I’d apply a research style philosophy.
If you have any corrections or questions, leave a comment!
**LITERATURE REVIEW REFERENCES**
Port Fuel Injection Stratergies for a Lean Burn Gasoline Engine:
www.researchgate.net/profile/...
Speed-talk forum discussion: www.speed-talk.com/forum/view...
High Performance Academy: www.hpacademy.com/
Andy Whittle’s video: • Injection Timing
**LINKS**
Instagram: / built_on_purpose
Facebook: / builtonpurpose1
Patreon: / builtonpurpose
Podcast: podcasters.spotify.com/pod/sh...
Shop: kyushaspeed.com.au/
**CHAPTERS**
0:00 Intro
1:50 I’m a real experiment!
2:28 Project goals
3:15 Literature review
7:03 Test methodology
7:54 The test bed
9:12 Event chart
11:14 Test 1 (varying injector angle) results
19:30 Test 2 (280° and 400° injector angles) results
22:19 Possible testing errors
22:44 Summary of results
26:33 Open invitation for feedback
26:52 Outro
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DISCLAIMER: I am not a mechanic or tuner. This video is for entertainment purposes only and is not to be used an instruction or a guide for your own activities. Copying modifications described in this video is at your own risk.
DISCLOSURE: From time to time I will provide a link to a product I regularly use or think you might find helpful. Some products may be part of an affiliate program and this will normally be clearly explained in the video. Purchasing a product from one of these links provides a small amount of income and is a means to support the channel.

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Опубликовано:

9 июл 2024

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Комментарии : 28

@kyushaspeed 2 года назад

Have you experimented with injection timing/angle? Do you have a strategy that works? Let us know your thoughts with a comment!

@michaelallen2501 2 года назад

Lucky for me the Holley EFI software has a 2d 16x16 table for setting the Injection End Angle. I just built a super basic MAP vs RPM table using CVI for cold start and idle and OVI for anything above 1600rpm. Technically the high rpm OVI strategy starts spraying into the back of a closed valve but it just continues to spray while it is open. Given my cam specs I'm targeting 300* and 450*. If I wanted to get fancy I could optimize the 16x16 table for various loads and rpm and use an advanced table to offset the injector end angle based on coolant temp or various other sensor inputs. Honestly anything beyond what I've set up already is over my head haha.

@MegaMyk777 2 года назад

You have the data backwards as does Andy W in his video. The number in megasquirt for injector angle is degrees before top dead center. Numbers in the 200’s would be OVI, numbers over 380ish would be CVI.

@paulyaw 5 месяцев назад

I like what you're doing, and the way that you're going about it. S0 much so that I would be happy to donate a set of injectors to your project.

@DAT28C 5 месяцев назад

Injector positioning in the head vs further up the runners would have an effect on what the optimal injector timing should be. How would you go about factoring in injector timing with that arrangement?

@kyushaspeed 4 месяца назад

There is probably some maths or rule of thumb available to estimate the injection time delay as a function of RPM. I would verify anything with a real world testing.

@tuiske84 Год назад

Injector angle made big difference to HC and CO emissions on idle for my SBC LT4 V8 engine. I had problem with emission test before but after tuning injector angles it passed test nicely. I have big injectors and pulse width on idle is ~1,7ms. Best injection end angle for my engine was about ~370-380 degrees ATDC

@simonilett998 2 года назад

Nice one Aaron. You're certainly getting into the deep and gritty with the tuning strategies. That was a very interesting video. O.V.I definitely seemed to produce the smoothest idle, and it was visibly noticeable in the video, also the idle speed sounded highest with O.V.I too👍🇦🇺

@kyushaspeed 2 года назад

Thanks Simon. I am particularly interested in the claimed improvement of in cylinder cooling and knock threshold. How to test that though is a bit tricky

@grafja 2 года назад

Great test, interesting results, fantastic transfer of knowledge. Thanks for taking the time to explain everything.

@kyushaspeed 2 года назад

Cheers!

@MotorSwapDan 2 года назад

Great video thank you

@kyushaspeed 2 года назад

Very welcome

@GoFasterHD Год назад

Thanks for sharing. I recently added a FT600 to my turbo Harley with cam sync. My experiance so far is open has worked best, gives me me a more stable idle, it did start better with a closed valve. Don't forget your cam specs are more than likely start with @.050 lift so the open and close events are a bit longer. I'm right at 130--130 BTDC ending my inj cycle. what ever you end up using you will end up spraying on a closed vale when the duty cycle reaches 75% and above, at that point it pretty much a constant stream of fuel.

@kyushaspeed Год назад

Thanks for sharing Jim!

@anekastudio 4 месяца назад

hey man can you help me understand why there are still "most vacum" past 540 degree ?

@christianl.8089 Год назад

Hi, very interesting. Did you do one test for all data or a few? I am at the beginning of testing injector timing. My engine doesnt runs very hot, but i use tropic thermostat probe and fan to avoid much heat, so the fan would run early if the engine is idling around a few minutes. Guess i will have to unplug the fan?!

@kyushaspeed Год назад

I have only tested on my 240Z. The engine temperature contributes less moreso it is the valve temperature from the combustion in the cylinder which assists with closed valve injection vapourisation. I would not unplug your cooling fan.

@MotorSwapDan 2 года назад

22ms pw at idle! My engine is around 2!

@keithmckibben8774 2 года назад

More great stuff Aaron, but... Do you need me to send you a degree wheel that you can bolt to your crank pulley so you can spend a few hours degreeing your cam? Have a dial indicator? Its really no big deal and quite informative - fun to see when things happen during each cycle and how you can vary events by advancing or retarding. Then you won't be left wondering...and you can verify TDC while you are at it!

@kyushaspeed 2 года назад

Thanks for your offer Keith. I have a degree wheel on my bench ready to use soon. I am keen to know where TDC is.

@jamescaban7710 2 года назад

Yeah I figured you gain 10% so 225 isn't very bad but yeah that plug could be killing your top and power who knows you could have another 10 horsepower thank you for the video and your time

@kyushaspeed 2 года назад

Cheers James!

@alessandromeyer4888 Год назад

Did it ultimately have effect on your VE table?

@alessandromeyer4888 Год назад

guess it did, it had on mine. ;-)

@marlo0oty213 7 месяцев назад

@@alessandromeyer4888yea dropped 10 ve values on idle

@a.bax.5992 Месяц назад

Strange. Research by yamaha showed that open valve injection (OVI) had more unstable combustion than CVI. google: The Influence of Port Fuel Injection on Combustion Stability Edit: I realized you have it backwards. Open valve and closed.