T24A-FTS Throttle Body and Throttle Body Elbow Measurements

Thought I'd pass on a few measurements taken from a spare Throttle Body and Throttle Body Elbow off of the Tacoma (it's the same for other T24A-FTS platforms like the LC250/4Runner).

Located what I think might prove to be a choke point.. Enjoy!






*My calipers aren't perfectly positioned here, but the ID of the TB is 60mm, which gives us a cross-sectional area of ~2827.4 square mm excluding the throttle plate/bar.




*Choke point located!


With an OD of ~47.75mm and a wall thickness of ~3.25mm, that is an approximate ID (at the radius) of about 41.25mm (~1336.5 square mm).

 

I have to ask, but you don't have to answer.
Is there a "new one" in development?
Maybe even a "test prototype" on truck?


Ok....Ok....What I really what to know is, did it show any improvement on the dyno? (You know that's what is ultimately going to "sell it")

Again, if it's a "secret for now". I'm ok with with that too.

 

I'll say there is a pretty significant pressure drop across the system in OE form from the turbocharger outlet to the intake manifold plenum (if you can call it that).

 

So we do have data......(That's all I need to know).
Looking forward to see what you all come up with.

 

VF will be producing these.



"Coming soon...and available for pre-order this week.
Tacoma/4Runner/ Land Cruiser 2.4L Turbo CNC Throttle inlet pipe.
- Dramatically increases the Throttle inlet pipe diameter. No longer restricting down to 40mm.
- CNC Billet Aluminum
- Designed in the USA
- BOLT ON compatibility.
- Replaced the tiny, restrictive plastic one with a larger volume CNC

Replacement.Will provide:
- Dramatically less intake restriction
- More flow
- Better throttle response
and more

Pre-order for introductory pricing of $325!"

Let them know OTT sent you! If 10 of you mention that OTT sent you, he's gonna discount them further to $299!

VF has requested that anyone wanting to purchase and get their "OTT" mention/discount, please email Support@ovtune.zendesk.com and reference the throttle body inlet.

https://vftuner.com/products/vf-throttle-inlet-pipe-toyota-2-4l-turbo

 

Awesome! I will email them. Do you have any dyno results from this mod?

 

designed in US. made in chinatown? no actual pictures of it on a tacoma...

 

This part was designed entirely here in the U.S., and what you're seeing is a 3D CAD rendering intended to share development progress and provide early visibility to the community. It's not yet in production, which is why photos on a vehicle aren't available—yet. The goal of sharing this now, along with a pre-sale opportunity, is to give early adopters a chance to get involved and help offset the initial production costs.

We're here to contribute to the community by pushing the envelope—bringing new, innovative, and problem-solving products to the table. That process often involves risk, investment, and transparency about where things stand.

When folks immediately jump in with negativity before a product has even launched, it doesn’t just affect us—it creates a climate that discourages others from taking similar initiative. If we want to see continued innovation in this space, primarily from smaller teams trying to do something meaningful, it helps to approach these efforts with some curiosity or constructive feedback rather than dismissal.

At the end of the day, they're just trying to build cool, functional stuff that solves problems for enthusiasts like us. Hope you can forgive us for trying!

Best,

 

We'll be highlighting this part as part of the Stage 2 release coming very soon!

 

i understand now why no pictures of installed.

 

I popped the hood today to see what the install might be like -- doesn't look too hard.

 

@JustDSM So...what's this 500hp bolt-on kit that VF has just started advertising? Is this something different from what OTT has been working on? Sounds like this replaces the whole turbo not just the compressor or exhaust turbine.

https://vftuner.com/products/2024-land-cruiser-bolt-on-500hp-package?variant=46647900438782

 

Correct — this is a different product from what we're working on.

The setup we're assisting with is being developed to retain the OEM turbo housings, meaning it will look completely stock from the outside. Internally, however, the housings will be machined to accommodate larger compressor and turbine wheels, allowing for increased output while maintaining a factory appearance and faster spool characteristics.

The VFTuner kit is based around a full G25-550/660 turbo replacement, which will have a higher overall power ceiling, but with some trade-offs in terms of spool and response. It really comes down to what the end user values most — ultimate peak power or a more OEM+ solution that delivers strong gains with stock-like drivability and appearance.
Just different approaches for different goals. Nothing wrong with either option! We'll develop calibrations for both options.

 

500hp would be more than 200hp per liter. I'm a little skeptical how that power density can be achieved reliably with stock internals on any mass-produced engine. The G16E made 187.5 hp/L in the 2023 GR Corolla which was a world record for a stock engine. Even with Toyota's factory engineering behind that power density, there have been a few engine failures in the G16E possibly related to excessive blow-by from low tension piston rings.

What horsepower is the OTT kit aiming for?

 

The T24A is a robust engine. It’s already been tested to 35 psi on the G25-660 without issue. It’s important to recognize that comparing factory power output to what's achievable on stock internals in the aftermarket isn’t an apples-to-apples comparison—Tacoma OE power levels are intentionally conservative, factoring in emissions compliance, NVH, fuel quality, warranty margins, and more.

The G16E is a great example of a factory-built high-specific-output engine, but its stock output doesn't define the limits of other platforms. For example, the 2JZ—designed back in the late '80s—made around 100 hp/L in stock trim. Yet, with the right supporting mods and tuning, OEM short blocks have been known to live reliably at 800+ whp, and some have pushed well past 1000 whp. That’s over 300 hp/L on a decades-old design.

Our goal with the T24A isn’t tied to a specific number. We're focused on developing safe, reliable calibration strategies that scale with the hardware choices and goals of the end user. If someone has a particular target in mind, our testing enables us to provide proven, real-world-based guidance and solutions to help them get there safely and sustainably.