ITBs don't make power, they make music.

Sounds great, looks great!

What a sound ❤️

I used to had an NC. Header 4-1, decatted only a muffler mounted. Adjustable dampers front and rear. Light wheels and sticky tires. God, what an incredible machine. I could not mount the ITB's cause I sold it. But I'd like to have another one.

i run 8 ITBs on a 452 cu.in. Ford FE. I use a Megasquirt 2 in ITB mode. ITB mode is a blend between Alpha-N and SD. It's very hard to tune ITBs in solely Alpha-N or SD. both have compromises. Typically, ITBs produce more torque than a single plane because of the ram effect. Usually the trumpets are too short to produce a tuned intake effect. The don't always make more HP. A well tuned single plane will make similar horsepower, but the part throttle function idle, and throttle response is a world of difference.

That's neat. Like the originality. There's a company that also does superchargers. I think it's vr racing.

I love those red door cards

Properly sized (long tubes) ITBs + Lightweight Flywheel is the way to go

Looks like OZ Racing wheels, do you remember or know which style they were? They look excellent!

Silent night background music? HAHA

Throttle response is a big part of ITBs too. The air doesn't need to take as long to reach your engine. Yeah it moves at the speed of sound, but that's still milliseconds.

Cool stuff. Question. How do intake temps look on the road with the hood closed vs. the stock manifold and a typical intake? ITBs always look awesome on the dyno but without cold air ducting sometimes road performance can take a hit.

Hi, great video, thanks for posting. Can you please let us know what those peak numbers for BHP and TORQUE were?

Power increase depends on runner geometry and not where you place the butterfly. I think it's easy to understand that when you floor the pedal the flow is parallel to he butterfly so that's like no butterfly being there. You even have less restriction with a well designed single throttle (less pumping losses). The only reason of ITBs is throttle response because less volume to fill on transient throttle (noticeable only at low rpm let's be honest) and more sound with open trumpets (not good for power apart from rare extreme NA setups). Remember itbs were used in racing only to make the car more driveable with extreme cam durations not to increase top end power.

Makes me wonder how much more a 2.5L swap with cams and 11.5:1 compression ratio pistons would make.

Air intake not getting cold air when hood is closed. I see issues later on with it.

Did you have issues with idle tuning? My ITB setup on ECUTEK runs horribly on the initial warmup phase and it seems to die when the AC compressor runs or when i put load on the power steering pump.

sounded like a terrible bog when you were bilping the throttle at the end. The air flow isn't linear you need to tube for e that big jump in CFM as the throttle starts to open, this may be your loss of TQ on the dyno graph.

Isn't it better, and I mean much better to tune ITBs via TPS than off a MAP sensor. Serious question.

Does it not need a cam for best results from itb

Stratified do you think you’ll ever swap a 2.5 Fusion engine in a Miata & offer tuning for turbocharged 2.5?

Seems like a lot of work for little gains when the ND2 starts at 148 hp to the ground

How about a bigger throttle body on the stock manifold which is obviously designed for all round performance. This setup is really high rev race car spec, if more useable power is required for the street then put a bigger engine in it.

the 2.0 have vvt?

What's the point of dynoing with the hood up on a system that will be sucking 70°C under-hood air when it's down? I mean, it's not even close to a real representation of what the car will see on the road. Are we interested in throwing up a dyno number, or are we interested in seeing what happens during actual use?

Silent Night playing?

Do you guys actually tune ND1 or ND2 miatas?

Does ecutek support alphaN?

Itb kit for 1.6 nb2??

What wheels are this?

Very complicated set up . Why not a turbo or a supercharger as it comparativly simpler .

Nothing quite like running down the road investing hot air just to hear the engine music.

Christmas music lol someone is getting fired

Once the hood is closed, engine is sucking in hot air. 🤦‍♂

Wow, everything here is wrong. ITB filter is sucking in under hood air, which is bad. Dyno run is with the hood up. Unless the car is driven that way normally, might as well have just drawn the graph with a crayon. Where’s the big fan blowing air into the grille, simulating actual operation? With ITBs, you’re giving up the ram charging effect in a normal intake manifold. Dyno run is just a WOT run up to redline, so you have 4 WOTs. Is that better than just one TB? Need part throttle runs to show if this is actually usable, or just a Dyno queen. Speed density programming? That’s just a smart carburetor. I’m not bashing, but sometimes you just need to tell the customer that what they want is worse than what they had. As far as Dyno runs go, check out Banks Power for a tutorial on how to dyno anything for accurate, real world results.