Comprehensive Guide To GM Ignition Timing | HP Tuners

[@hpa101]

Get $50 off your next HPA EFI Tuning course purchase with this coupon: 3NADNF Enroll now: bit.ly/3rf25uf

[@floridasaltlife]

This was the single best HP Tuners video I have ever seen. Many questions answered for a guy that is just starting to grasp all of this enough to be having slightly more advanced questions than how to turn it on. bravo !!! I picked up at least 4-5 huge tips !!! Thank you x100

[@hpa101]

Hey Doug, thanks for your comment mate. Really appreciate it. If you want to keep learning some stuff for free we have some more videos here: free.motorsport.education/reflashing-lesson-1 Enjoy. - Ben

[@pcmfrenzy1089]

This is what alot of us are looking for. This tuning content is what we want to see more of. Please show some more, like how you tune the MAF for fueling using a wideband.

[@hpa101]

Punch Free Lesson into the search part of our channel for more of this. This video, and those, are actually pieces of our paid course material ;) - Taz.

[@jamesk10turbo47]

This was great! Please do more HP Tuners videos.

[@hpa101]

We sure will mate. We actually have a full course deadicated to it here: www.hpacademy.com/courses/practical-reflash-tuning/

[@shulegoing3119]

Thank you Andre. That was incredibly helpful.

[@hpa101]

Glad it was helpful, cheers for the support =) - Taz.

[@michaelscott4924]

your the best, this is way better then rop. thank you again this saved me!

[@JohnnyCTSV]

This is why you pay good money for a good tuner. Good video and very informative. I'll do the wrenching but leave this to the pros! Lol

[@hpa101]

Yes sir, a good tuner will be able to get you dialed in. However don't be fooled with some time and dedication there is no reason why you can't learn to tune yourself :) - Ben

[@陈杨-w2k]

you are the best teacher to me,thank you so much, good man.

[@hpa101]

Thank you!

[@scasinger123]

You are awesome Dude! I am learning to tune with a 2008 G8 that is otherwise stock except for DOD delete and LS9 cam. So, far, I have learned a lot, but not there yet.

[@hpa101]

Happy to hear you're making progress Scott! It takes a bit of time but you'll get there. We have a lot more information in the course material that will help you too ;) - Taz.

[@Good-Enuff-Garage]

thanks for the outstanding video mate, can you tell us what's the difference in the Timing Advance and Base Advance Channels and which one is the Spark Advance in the chart view?

[@liammcinerney5565]

If your running speed density as apposed to MAF, can the histogram still log g/cyl without a mass air flow sensor? Great video, thanks in advance.

[@hpa101]

Hi Liam, yes. even if you're running in SD, the PCM still uses the VE table to calculate mass airflow and hence load is still represented in g/cyl. - Andre

[@franziso1]

Great video! So If I add more fuel on a turbo car, I should advance more the spark?

[@WeAreCarFans]

I understand why timing is advanced in high rpm. But why it is less advanced when Spark Airmass (engine load) grows? Could you please explain? Thank you.

[@Good-Enuff-Garage]

brilliant video mate

[@hpa101]

Glad you enjoyed it =) - Taz.

[@Vilenessus]

thanks for the subtitles

[@hpa101]

No problems mate. The Kiwi accent is a little hard to understand for some. We are in the process of adding accurate English subtitles to the rest of our paid courses too :) - Ben

[@freddienz68]

There is nothing wrong with your kiwi accent . keep it up. would love to learn about this ls tuning for real. Cheers mate

[@JWorldAdventures]

Great stuff! I learned a lot. I was just wondering if there is a bundle for the remote dyno lessons?

[@hpa101]

Glad you enjoyed it :) Yes you can find a bundle here: www.hpacademy.com/remote-practice-dyno-lessons There's also one for the lessons and courses here: www.hpacademy.com/hands-on-starter-package-with-bonuses-live Any questions just email and we'll look after you: [e-mail] - Taz.

[@antonmur]

Hi, great clip, very well informed. I have a question regarding deceleration, i think the spark advance chart has answered it for me. Can i confirm that when the throttle closed, spark advanced greatly because of the weak mixture and vacuum advance operating as it should but then reduced greatly back to 3-4 degrees because of the real high engine vacuum while engine was spinning at 5000+rpm. Is that correct tuning? Thank you

[@hpa101]

Under high vacuum there is a limited amount of fuel and air in the combustion chamber. Under these conditions the combustion actually takes longer to occur so we require more ignition advance in order to achieve peak torque (MBT). In an over run situation where you're completely off the throttle this is a bit of a moot point however as the PCM will use deceleration fuel cutoff where the injectors are completely switched off so no combustion is occurring.

[@Supercrewchief]

Great info! Thank you! !!

[@hpa101]

No problem, thanks for your support Charles!

[@MatthewLaRiviere]

Thanks for posting this awesome information. While I normally live in a flat sea-level location. Real world application question -- How does this change when my girlfriend says hey, lets go tot he mountains, and we climb at 15mph in a low-speed cruise? I feel like the car was having a hard time maintaining such a low speed. I suspect the timing making the pedal so sensitive, but also what most drivers want under these conditions. The big question is, are we reaching a load that exceeds the timing we've specified?

[@hpa101]

As altitude increases, air density decreases which affects both the required fuel delivery and the optimal ignition timing. Assuming your car is still equipped with a MAF sensor, altitude shouldn't be a large consideration since the MAF sensor directly measures air mass which accounts for altitude.

[@gregorykusiak5424]

High Performance Academy in a speed-density calculation the MAP should play a part: not only does density decrease with an increase in altitude, so does pressure as a result.

[@fir3w4lk3r]

Excellent! You are great! I have the demo version of the soft ware. Can you please share the log file (hpl) and the maps (hpt)?

[@hpa101]

Glad you enjoyed the lesson! I don't have these on hand, but if you are an HPA member there might be something on the forum. If you just want something to mess about within the demo version though you will be able to find some base maps on the internet pretty easily with some Googling though :) - Taz. www.hpacademy.com/forum

[@fir3w4lk3r]

Thanks you for your reply. I am an Electronics Engineer and I teach electronics to automotive technicians at a vocational training institute in Athens Greece. I want to expand my knowledge around automotive electronics (ECU programming, remapping, repairing) in order to teach my students in a more efficient way. When students ask about ecu tunning I usually shows them your videos! It would be really awesome if I had the log file and the data of this (for example) lesson you did. Thanks you again!

[@hpa101]

That's awesome! I can't promise anything other than to see what I can do for you. Email me via [e-mail] and I'll follow up with Andre in the meantime for you - Taz.

[@rmnanney]

Very well done; subscribed!

[@hpa101]

Thanks Ryan, appreciate the support. - Ben

[@billrimmer5596]

Wow. U r one smart Aussie!! Does the pcm have a way of learning the octane. Or does it do it by hearing knock? Very informative!! In Los Angeles

[@hpa101]

Hey Bill, Andre is actually from New Zealand but as both countries have horrible accents it's quite easy to get the two of us mixed up! I am not as experienced as Andre but I don't believe there is an easier way to test octane without expensive testing equipment other than by knock. Obviously you really want to be looking at it from the angle of what power you can achieve with specific fuel before your engine becomes knock limited rather than trying to work out what the fuel you just tipped in the tank is by the same method though. If you are running Ethanol based fuel there is a way to test the percentage of this. Andre has written an article on this topic that you can find on our website if you are interested - bit.ly/ethanolpercentage For a more experienced reply in regards to your octane question you can also ask on our Members Only forum which Andre patrols. It does require Gold Membership but with that you also get access to our weekly webinar lessons. Forum - www.hpacademy.com/forum/ Webinars - www.hpacademy.com/webinars/ Happy tuning! - Taz.

[@joecizin9357]

Wow. U r one smart Aussie!! Thats a bit like calling a Canadian a Yank,

[@ImKittyCow]

Are there many important differences between tuning gen 4 and gen 5 ls engines? I'm fairly comfortable tuning gen 3/4's, and my buddy is putting a turbo on his 14 silverado with direct injection and needs somebody to tune it, but im not sure how much of my knowledge carries over to gen V's

[@andronaline]

Thanks for the info.

[@hpa101]

Our pleasure, hope it helps =) - Taz.

[@09fatbobmike]

Do you tune Mopars and teach those as well? very nice video

[@hpa101]

We are adding a Mopar/Chrysler example to the course material later this year, however, many people have use the existing core material which is comprehensive to get started tuning their Dodge, Jeep etc etc 😎 - Taz.

[@09fatbobmike]

@@hpa101 dumb literal folks like me need it lol

[@hpa101]

It does help you learn faster when you can look at the same thing. We will never be able to cover every software and engine combination out there though, and with that in mind the tutor Andre really does his best to teach you how to tune and not just how to click what he clicks without understanding as that will only lead to disaster. Either way, this is something on our list as mentioned which is great for you, keep an eye out for it although I strongly recommend you start learning via the EFI Tuning Fundamentals first now so that you can hit the ground running with the later course material once it is there 😎 - Taz. www.hpacademy.com/courses/efi-tuning-fundamentals/?

[@ZUL8R_DAVE]

Awesome stuff! Thank you!

[@Onalky87]

I think stock timing was 16*. I've got 25 or so in it. But it never sees that much. Depends on the pull. I can make one from 4000-5800 and it'll start at 18* and climb to 21 and then make another and it'll start at 20 and climb to 23. Should I put all my correction multipliers back to stock?

[@scubastevoo8404]

what is the big draw with speed density tuning? why not just use maf and set a few params and off it runs?

[@isidrosevier1125]

hey Andre, I have a 2014 SS and my tuner turned off my ltft and also turned off the knock sensors. I have a can and longtime headers with a 6 speed auto. is there any reason why he would turn of these parameters.

[@zackchigo]

Excellent!

[@abdullaalshamsi5127]

How long is the course takes to learn how to tune ?

[@hpa101]

Hi, our reflashing course is around 5 hours long including the worked examples. Learning is quite personal and depends on your experience, how easily you absorb information and many other factors. We have some members that take our courses and then start practicing tuning practically within a week. Let me know if you have any questions. - Ben

[@doctorclaw8232]

Can't believe I have to learn that....

[@hpa101]

You can do eeeeet! It can seem a bit complicated to begin with, but if you take a step back, do the fundamentals first and then go through it all again step by step it really is quite manageable - Taz.

[@ZeroBoostBuick]

The 2.0 turbo 4cyl motor is a headache compared to the LS. LS motors are as simple as grade 1 math. Some of the Turbo GM motors are more complex in the spark timing. Especially with false KR and how to tune it out is almost backwards from the norm.

[@ItsRiley3]

Any recommendations where i can go if I don't know what spark advance is or adding timing?

[@hpa101]

Hey Riley, yes sir, there are some free lessons that are going to iron this out for you here: www.hpacademy.com/free-tuning-lessons Let me know what you think of them =) - Taz.

[@soufianattar4554]

just a newbie ! does your software replace winols ?

[@hpa101]

Hey there Soufian, you will enjoy this article. It outlines how reflash tuning works: www.hpacademy.com/technical-articles/what-is-reflashing/ Also watch this which covers how to choose your specific software: www.hpacademy.com/previous-webinars/126-how-to-choose-a-reflashing-platform The video is free with a free Bronze account. Enjoy! - Taz.

[@MrAndrius12]

Is there any info for diesel injection timing, AFR, etc?

[@hpa101]

Hello Hello, We have a course on diesel tuning that will get you started right here: www.hpacademy.com/courses/diesel-tuning-fundamentals/ Let me know if you have any questions =) - Taz.

[@timbowers1]

thanks for the help

[@hpa101]

Glad we could help Tim! - Taz.

[@soufianattar4554]

i just cant get the high octane vs lean octane angle spark ignition, should not the high octane has less angle than the low octane?

[@freddienz68]

Are all these tables available on my 04 Holden vy ss ls1 gen 3 ?

[@glenbrannon7224]

Awesome

[@epromdump8327]

hi my friend firsvly thx for yours videos very helpfull and my qestion is how i can open throttle speed limit ? and i have many qestions for u thank u againe my friend

[@hpa101]

Hi, we only answer tech questions for our members in our forum. If you are interested in joining you can here: www.hpacademy.com/register/gold-membership/ :)

[@blackmask3609]

Can i use the obd 2 with hp tuner to tune

[@ImKittyCow]

Black Mask360 when you buy HP tuners it comes with an obd2 cable with a scanner on it that you plug into a usb on your computer

[@anthonyrivera689]

Why is it that the switch that function the firing sequence can fire at right angle during lower rpm? why is it, it can't fire and can't open the switch at the right angle at high rpm's? 😍

[@ConTheDon187]

wish we had holdens here.

[@notsponsored103]

Aussies wish they had Holdens there too 😂

[@ConTheDon187]

@@notsponsored103 There's actually a company here in CO the converts the holden's to lhd and gets them legalized for the U.S. with whatever else they have to do. I bought my car from the guy in the shop next to them. They had like 3 out front and a bunch in the garage getting worked on. I was surprised.

[@notsponsored103]

@@ConTheDon187 I was sort of joking about the demise of Holden in Australia itself, but you can be forgiven for not getting my hopeless sense of humour. Regarding LHD Holdens over there though, I thought they were rebranded under the Pontiac logo.

[@ConTheDon187]

@@notsponsored103 No, just steering column and steering rack and stuff gets switched over, if I remember correctly but I could be wrong. They don't rebadge them and their is only the pontiac GTO which I believe is the Holden commodore? But no ute's or anything else that I know of

[@pitaz77]

Hi, are you sure that the knock learn factor 1.00 means the usage of low octane table? It is not the opposite what you are saying? The knock learn factor is running based of the knock learn parameters. It learns after clearing some DTC's when the low octane tbale was udes if the knock is present. And if not the knock learn factor will come to 1.00 what means the PCM uses high octane table... Or I am wrong?

[@hpa101]

The knock learn factor will revert to a value of 0.00 after a reflash and increment towards 1.00 as more knock activity is detected. You can see the affect of this in the data log we're discussing both prior to and after the knock event at 5300 rpm. Prior to the knock event occuring the knock learn factor is sitting at 0.00 but after the knock event the knock learn factor increments to 0.18, hence biasing very slightly towards the low octane spark table. The effect is more prominent when you have a lot of knock activity occurring. This is demonstrated from about 17:30.

[@pitaz77]

I see. I know where is the 'problem'. The gen III engines has the opposite direction of knock learn factor to the gen IV. Today I have logged a drive with my LM7 5.3 without any knocks and the learn factor rised up from 0.69 to 1.00 and then if I looked at the spark advance the PCM commanded from the high octane table.

[@victorkmarshall]

I believe Peter z is also correct regarding gen 3?

[@Emilthehun]

666 is the number of likes because this guy does black magic with a laptop lmao!!!!

[@freddienz68]

my question is... How do the tuners in the big cities eg. auckland.. Wellington..all nz. justify $1200 bux for a remap of my 04 vy ss.? all that they are doing is changing a few numbers here and there????

[@hpa101]

A couple of points to this. 1, it's definitely more involved that changing a few numbers here and there. Tuning any car requires a complete understanding of everything that is being changed. 2, You can't just tune every car the same way, every engine and setup is different. 3, to correctly tune a car you do need a lot of expensive equipment. 4, Like any professional their time is worth money, you have to remember that a mistake on their part could mean disaster for your. Our advise from years of experience is the cheapest isn't always the best. Great think with your specific model is the potential gains are well worth the cost :) It is something that we teach and you can learn, we think learning to tune is enjoyable and rewarding but doing it yourself won't be cheaper. Let me know if we can help you Freddie. - Ben

[@freddienz68]

Thanks Ben for your quick reply. I have fitted a x air otr full exhaust and still have the maf. but I want to delete the maf when I get it remapped. my gen3 ls1 has not been opened up and has 230000km on it and is my daily driver. So who would you recommend (or the best) to do this in auckland?

[@hpa101]

Sorry mate, can't really make a recommendation in Auckland, it's been a long time. I think Eastern Automotive, Pro Tune are a few places to start your search. Good luck :) - Ben

[@freddienz68]

thank you Ben for your help... So should i be looking for the tune shop that has the HP tuning software? by the way... the tuning school video's are awesome you guys Rock!

[@hpa101]

Freddie, I'd be less concerned with the software. Call around and see if they can help you with your specific model :)

[@saarrmmaaddmhemed8167]

great info . can you learn me haw to gm set backfire tuni thanks bro

[@2010gboyz]

I see that the TPS was at 83.9% max.??..

[@hpa101]

Michael, for some reason GM interprets the SAE TPS PID as absolute voltage %. The ETC PID would show 100% as you would expect. - Ben

[@1987FX16]

So I've been using the MAP instead of cylinder mass. lol

[@tinolino58]

I am so happy to not care anymore 🚀

[@timbowers1]

got my tahoe cam and doing 650hp

[@dh5254]

Tim Bowers you are not making no 650 hp with cam only gtfo

[@josephmelville1]

one seecond man lol

[@gallegos276]

why didn't you show how you fixed the timing.

[@hpa101]

Hi Ryan, you don't "Fix" timing you tune it. Using the information in this video, an understanding of how timing works and how far you should increase it, knock and the correct equipment you should be able to tune your ignition timing. I must note you need a complete understanding before you attempt to tune your ignition as changes you make could end in engine damage. We provide in-depth courses that teaches this as well as a support system to help you grow as a tuner. You can check out some more free lessons here: free.motorsport.education/bmtk - Ben

[@Turbogto_guy]

What is cylinder earmass and seecant?

[@hpa101]

I can only assume this happened while typing your comment XD radio-weblogs.com/0111737/categories/wow/images/cat-on-keyboard-med-001.gif - Taz.

[@Shadow0fd3ath24]

no hes making fun of your shitty accent

[@hpa101]

We understand terrible jokes just fine, but before you get too jumpy about our accent remember you have one of your own... ;) - kzbin.info/www/bejne/pni9q2pni5Vqqpo - Taz.

[@christopherbaumgardner5004]

Ear = Air, Miss = Mass. I did raise an eyebrow when he said stoichiometric but his accent isn't really hard to understand. Try talking to people from Louisiana if you want to hear English being raped and tortured.

[@billskalicky5400]

I sure miss distributors. Recurve run good gas and you are done.

[@sterlingwitherspoon5709]

I can’t see any words or numbers on your screen dude

[@matsinkal]

250kw Haha

[@hpa101]

Correct, which is about where it should be. Our dyno is called the 'heartbreaker' because it reads a little low, but so long as you're in the ballpark total output is only one piece of the puzzle - Taz.

[@nadimnzl3298]

I can have your email please !!

[@hpa101]

[e-mail] :) - Taz.