When VTEC kicks in and your head slightly hits the headrest. Build info: wiki.blackthum... Socials: Instagram: / blackthumb.tv TikTok: / blackthumb.tv Website: blackthumb.tv/
A few people have asked if it's possible to make the low-cam and high-cam VVT tunes "closer" together to get rid of that little dip in airfow, and the answer is yes! We could just make the tunes closer together in the VVL changeover area so the cams don't have to "catch up". We could also make a single VVT tune that takes the best of both graphs as well, which is totally fine! Many ways to tune a car! However, if I'm being honest, I just turned VVT off as I wasn't really seeing all that many gains, especially now that this car is supercharged. Glad you all are enjoying the video, and hopefully learning from it!
Something else to think about is that VVT should also change with respect to load. At part throttle you want EGR to reduce emissions and more knock margin.
That was an awesome video to watch. I never thought of using the MAF as makeshift dyno! My jaw dropped at the amount of time you must have put into putting this video together. The quality really shows.
Mass air flow combined with exhaust gas temperature and should tell you exactly how much power the engine is producing. Based on the difference between fuel usage vs heat production.
I mean… sure… but it’s not like Honda VTEC makes Honda engines anything special from a performance perspective. In fact I have a Civic but the only thing is has is VVT plus a nice turbo. Tiny 1.5L engine but full torque at 1800 RPM. I cruise in 6th gear at any speed above 40 MPH. Go up hills in 6th. Pass in 6th. Pass going up hills in 6th. I’d much rather have that than having to double downshift to kick in VTEC, yo… any time I want to do something.
Dude that is the best explanation I’ve heard/seen of VTEC/VVT ever and I’ve been through training of this stuff in the past, you definitely have a gift my friend 👏🏼 👏🏼👏🏼
If you have the piston to valve clearance, you could try running the intake cams one tooth off on the belt. Not sure what kind of change in cam timing that would net, but with the small gains down low, and the bigger gains up high from the lower LSA, you may find some more free power up there. This is pure theory and something I've never considered, but looking at your graphs, it may benefit your particular setup. Great content! hope this channel blows up, love the work.
I don't think you understand how well this video was made, this is your masterpiece right here, easy to follow for those without much knowledge and those who ''know it all'', it's pretty much a tutorial for getting the max amount of power out of a stock-ish N/A engine even though it wasn't meant to be that :D Earned yourself a sub, awesome work buddy, keep it up
Please change nothing about your channel. This is my new obsession. Easily my favorite car channel. This channel is going to take off. Don't change a thing.
first time seeing your channel pop up on my feed. I must say your content is amazing. you make things so easy to understand and answer our questions before we even ask them. you've definitely earned a sub from me 👍
Now i really get to see wat changes vvt n vtec does to the engine and what tuners were lookin for on their laptop. 22mins of explanation dats clear as day. Sub!
You are fast becoming one of my favourite channels on here, I'll have to try make my fb25 manual slightly less horrible down low, it feels like it's tuned from factory for a CVT, I definitely think it can be smoothed out at minimum.
Wow I’ve had to endure some pretty complicated explanations around VVL and this one video knocked it out of the park! I’ve got a Primera that comes with Nissans version of VTEC (NEO-VVL) and the things I’ve learned (minus the timing, which isn’t applicable since Neo VVL doesn’t incorporate timing on the SR20VE) are things I’m gonna have to figure out when I go to get my car tuned later on this year, this video’s helped me gain a bit of confidence around making sure I get the most out of my engine. Definitely earned a subscription from me! Cheers from New Zealand 🇳🇿
That was the most I’ve ever learned in 1 RU-vid video… maybe more than I’ve learned in 10 years of wondering what both these things do! Awesome work, certainly subscribing. Also… do a raptor supercharger kit on the EZ30R!
This might be the best video relating to airflow and tuning I’ve ever seen. Like I feel like I could go out and do some of this tuning myself… and have fun. Great video
technically speaking, V-tec gives you THREE different camshafts in one, phase one - first valve barely opens while second one opens normally, second phase - first valve starts to open the same as second one did, third phase - both valves start following a third cam - which gives if ample of overlap and you can yell "VTEC KICKED IN YO"
How do you have such a small amount of subscribers? I just came across your channel but you definitely deserve more. I’m sure you will be at 1 million subs in a year or so. 🔥😎💪🏼, you are very informal. Keep up the good work Homie.
Brilliant explanation on the AVCS (VTEC) behaviour! One thought, why not bring forward the cam advance slightly so the delay happens before the VTEC kicks in?
My tuner lowered VTEC engagement and yes the cross over was smoother and less pronounced this video brings me some joy knowing I'm probably picking up some hp even tho I'm losing the big cross over.
Keep at it BlackThumb! Your a great deal of importance to the RU-vid car community even with a smaller following. Your style and wealth of knowledge is what TUNES us in. Your going to get big on the Tube soon enough! Collaborate if you can to get your bitchin channel out to the masses!!
vtec is vvt_L is variable valve timing which controls the duration of the intake and exhaust valves in response to throttle to deliver more accurate power and lower fuel use in low throttle input. the L aspects stands for Lift and further increases the effectiveness of vvt by being able to alter the valve lift to physically allow for even more air to enter in and out of the combustion chambers with an added increase in fuel which is regulated by the ecu in response to the increased air flow. This creates even more power than just vvt at a high throttle input and better fuel economy at low throttle input. Ingenious system that can make small displacement car produce adequate and accurate power and further increase in lower fuel use. Really important system in automotive engineering and is responsible for the cars we know today.
Yes we wired up a manual toggle switch in the car to the vtec solenoid, and we could hit vtec anytime you wanted to. I remember popping that switch later at like 6800 rpm and that VTEC sound hit like a bomb ! Sounded mean af didn't do sh*t for power tho lol
This was a fantastic video, and made tuning seem a little more simpler. I thanks you sir. Also VTEC on a Boxer engine is bad ass. As a Honda enjoyer, it's really cool. Not mad at all.
This video has 100% earned you my like and sub! This is absolutely amazing and brings a bit closer the magic the tuners do on the dyno. Would be amazing to see a series called 'Tuning your car for dummies 1-2-3' or something. I would 100% watch all of it and tune my own Mitsu Colt based on knowledge from you!
Subbed. Reminds me of my old 01 Legacy GT wagon, man, the primitive shit we used to have to do then versus now. I remember when the rs25 guys and I-speed launched an ecu swap in like 2006 and the pinouts didn't match, one was a Unisia Jecs and the other was a Denso ECU I think... (I did have two moonroofs and a factory rear lsd which the same era impreza rs didn't, lol)
This was just recommended to me this morning for the sake of the algorithm I figured I would let you know lol. Very interesting video my man, I subbed and shared with all my buddies. Cheers!
20:48 if you were feeling brave, you could try mechanically retarding your intake camshaft from the stock timing position and then use the VVT phaser to make adjustments for the low rpm ranges
