Mastering the Art of Hand Porting: The Complete Guide to Porting the Toyota 2JZ-VVTi head Part 13
HTML-код
- Опубликовано: 10 фев 2025
- In this video, we're going to be discussing the importance of polishing exhaust ports and how to achieve the perfect porting result. We're going to be discussing the 3 stages that need to be followed in order to achieve the perfect result and why mircopolishing the exhaust port is so important.
If you're looking to replace your stock exhaust port on your Toyota 2JZ-VVTi head, then make sure to watch this video! By the end, you'll know exactly what needs to be done and how to get the best results possible. Mastering the art of hand porting is essential if you want to get the best performance from your engine! 
Авто/Мото
Looks great!
Thanks!
I would like to see a series on the k24/k20 heads
We just did some K24 heads at 360cfm for some 900hp plus turbo setups. I'll see how much footage we got on porting it. 👌
Great series. Lots of little nuggets of info in there.
I'm porting my second set of heads right now and would love for you to make some videos on the math as well. I have Pipemax and it's giving me some really whacky numbers for the intake port ACSA on my 4.6 3v...smaller than stock. (Asking for 1.65 in.sq. and in stock form they're already at 2.01 in.sq.) The runners remind me a lot of the 2J intake runners, so I'm sure you could shed some light there as to this discrepancy. The runner has very little turn, so maybe that's part of it?
Pipemax recommends an intake runner ACSA of 1.65 in.sq. Of course there are other factors at play, but the last time I built this engine, I hand ported the heads I ended up with a 2.18sq.in. ACSA and the motor peaked at 6000. I think intake and cam timing had something to do with that. But, at any rate, doesn't seem to be that the ports are too big...the low end torque was pretty strong and it still choked out before the camshafts theoretical peak of 6900. Not to mention, the FRPP/Livernois CNC port version of these heads has 219cc intake runners, for an ACSA of 2.53in.sq.. Just trying to make some sense of all of this and apply what I can while I still have the heads off the car. From there, we'll see what the dyno says.
Anyway, thanks again and great videos!
Yeah we will be doing some videos on the MSCA and ACSA and I've done quite a bit of work on the Ford modular engines. And we have an NA set we will be doing in a few months. So we will probably do some vids on them.
@@bainracing Cool. I'll keep an eye out for them. Thanks.
When it comes to valve jobs on these engines are you going +1mm multi-angle and deshrouding based on the cam lift if adding a hotter cam?
Yeah, all our stuff is done on a single point CNC seat cutter, so we set what angles we need for the head. And set what throat we need for the valve size. And cut in one process.
Generally, all out racing will be 90-91%, and street duties will be 85-88% depending on the RPM range it's using. Many don't need an over Size valve, so we set the throat for what it is doing as far as where they want the power.
Would love maths series
Hopefully building one mate 🤞
Ayo sick vid, usually most ppl cut the guide boss oddly enough. Is there a dyno video around anywhere?
Yeah we use to post a bit of dyno stuff in the earlier days. But once you work out how easily manipulated the figures are. It's truly a waste of time as so many BS about their results. Just like flow numbers.
But we don't get involved with retail as nearly all our work is for race shops and for over a decade we pretty much guarantee when we do a head it will bet any other ported OEM head out there.
This is why we focus on port energy and velocity. It never lies like a flow bench will.
But HP results with any good port job are usually 50-150HP at the same boost better. Even back in the late 90's were we seeing 100+hp at the same boost on little 900hp 2jz's.
If you target the velocity gradient properly, you can only make more. 👍
Edges on the valve seats. Even on exhaust valves seats?
Depends on the exhaust port shape, but generally, sharp on the valve with a nice bug tulip and radius on the seats only on exhaust is fine.
Ok. On exhaust, sharp on tulip style valve and radius on exhaust seat.
Thanks BainRacing!
@@bobirving6052Yeah ive found some like a longer 45 valve seat on the valve, not so much back cut like and intake likes. But will come down to valve and port shape. Theres always one head that will throw a curve ball!
Wow. Custom for everything
Thank you so much for making these videos! I cant wait to start on my 2J. I have a spare head to get working on while I continue to drive. First I'll have to gather the right tools. As I type you're listing other engines you'll be doing. Subscribed and will for sure be staying tuned in! Any chance you've worked a 3S-GE Beams out of an Altezza? I am very interested in seeing you do one of those as well though I understand these are not as popular. Thank you for what you're doing!
thanks for the kind words. yes we have done lots of Toyota stuff. Next 3S we do. Ill make sure we do a series on it
Very nice Jake. Looks like your starting to get some more subscribers. Personally, I'm particularly looking forward to you doing something on the maths side of things. This is an area which is, in my opinion, very neglected in most videos. Regards Greg
Thanks mate, yeah we will be doing some in the rear future and showing people how to use my calculators online. just trying to get my last calculators from spread sheet to internet. I struggle with the equation conversion for the "J Math script", but getting there. just have to simplify some of my equations.
That math sounds like the key. Also sounds way over my head 😅
I'll be breaking it down in videos to come mate