How do you keep the bottom end together when revving so high? I do not see a girdle or ladder caps to keep the crank happy. Is it only because you are doing quick pulls and not sitting at those rpm's?

great job , what if the fuel is at sub-zero temperatures ?

Never said it, but thanks for your meticulous presentations. Nice and dry, just like your humor!:) Hope you keep it up! Also wondering if your following Tomitaku-san's 4AR project (i.e. busa head on a 4A block) and what your take on it is? Cheers from Sweden!

Love this truck! ❤❤❤

You’ve got the best car nerd tuning videos on the internet. Very informative with data to back it up.

Thank you so much for the amazing video. I really appreciate you taking the time to do all of this. Best channel I have found in a long time. ❤❤

Hi , what max rpm this engine have?

Thank you for very well demonstrating that choking down exhaust will kill power. And every old head who says that backpressure is neccessary, doesnt really know what he is talking about.

Im gonna tell about your channel to all my friends!

Can you test stepped headers in the future? An maybe anti reversion chambers / design too.

Yo bro! You do all this fabricated work?

More important to note is that the longer rod hangs on for approx 500rpm longer - that's huge on a competition engine ! tune out the dip at top end and you've got a winner

My jerra bliksem swaar! Where's the bell mouths into and out of the airbox!? There studies on the net about how much it helps. Like 10% IIRC. They all say the same thing: Quarter Ellipse where the whole ellipse has a 3 to 1 ratio and mouth diameter is 2.1 x throat diameter. Also 7 degree Static Pressure Recovery into the airbox and Ram air... Moet ek jou kom leer swat of wat!? :)

You has tested turbo free flow vs pipe X diameters?

Those dips look like a valve spring harmonic. Even still, great tests and info.

Great video. Thanks for all the info'! 🎉

Ok no work but new motor tune for high rpm engine save bearings and wear rings?

Can you tell me do you run your good engine to 10000 rpm on a forged crank or is it a std crank. Can you still get forged cranks?

Terrific video as always, it does make me wonder if the potential gains are not from vacuum pressure but from evacuating the oil/air mixture from the crankcase and reducing windage losses. If you ever take requests for videos, I'd love to see this engine with standard steel, and zero-clearance teflon crank scrapers on it!

Been watching since it pulled 110 BHP.

This is the best engine channel on youtube. No bs, jut tested facts.

Wow, it’s subtle, but I think I can hear the difference in the stepped one, just like Maisteer said.And the old one is a masterpiece with graceful curves

My friend. You are the go to man for testing performance mods for all cars. Everyone talks but you actually test.

If there is a mivec 4g92 engine, would love to see you do a test run.

What car is that

0:07

I sealed the breather input and created real vacuum

What do you mean °BTDC?. You mean you get more power if you start ignition way before the piston hits TDC?. Is it not the other way (until a certain point). You try to retard the signal so that the piston does not have to go against the ignition that is already taking place (which is already creating a downward force), also not too much due to optimal compression?. Why does everybody say that you need to retard it but in your test you advance it?. I did it myself but got higher power by retarding the signal not advancing it, and defintiley not 30°. Am I missing something? If so could you please clarify it?

File for the prints

Amazing video!!!

1.6cc 210bhp 50to60 @ 60to76/// +6 bhp My h22 honda 2.2cc 260bhp Only Catback 50@76 +20 bhp If was 2.2cc 210bhp 60@76mm +6bhp?

the pipe diameter must be changed. not shutting off the exhaust 🤔

What you need is shorter stacks

Wouldn't the vac pump only provide benefits to a motor if its experiencing issues with combustion pressure escapi g past the rings already? I mean if the motor is running really all and not experiencing any real blow by past the rings you wouldn't expect gains from a vac pump.

Well tested.

Crist Orchard

Hello.it's a pity that you not measured afr at the same time.

2jz??

what is the cam spec in Your engine on this movie ?

Powlowski Route

Jocelyn Drive

Super 👍👍👍👍

🔥🔥🔥🔥🔥

Meggie Walks

Deon Branch

Excuse me, just one question, if I disconnect the 12v connector, will the ducts always be closed? thank you

A good test will be with bigger injectors that will be used in low duty cycle (lower than intake valve duty cycle) . Maybe you will find some diferences in hp there by altering injection timing

Tuyệt vời 😊

Gregg Locks

Mitchell Street