Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Haven't seen this listed anywhere and I'm definitely not in a position of being able to figure this out by measuring one on my own.

I know the turbo is a "Single Scroll MHI TD04", but does anyone know the actual wheel dimensions on the compressor/exhaust wheel? I'm assuming something around 40-44mm on the exducer on the hot side, 45-50mm on the inducer. Maybe 45-50mm on the compressor inducer, 54-58mm on the exducer.

But this is just random ass guessing, curious if anyone has actually measured one of these.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Td04 seems too small for the type r.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

2017-2018 Honda Civic Type R Turbo Review of Specs / R&D / Development + More!

https://www.civicx.com/threads/anyon...e-turbo.12716/

Supposedly a TD04 running at 23PSI.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Judging from the power the FK8 Type R is able to produce (~380whp) it has to be a TD04HL variant with a 18T, 19T or 20T compressor wheel. FYI McLaren use a similar turbo in twin's configuration for their 3.8 litre V8 (1.9 litre per turbo). Direct Injection, VTEC and high compression undoubtedly help extract every last horsepower from the limited lb/min flow.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

I don't know of any tuned/bolt-on FK8 making over 350WHP with the stock turbo?

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

I've only had 2 in my possession briefly, and couldn't measure wheels from them at the time. One was for a 10th Gen SI, the other for the FK8 Type R. I'll see if I can get them back to get some photos, or something.

380whp?. mmmm. possibly., But even the 18T's never got to that level, even if they prayed. I'll give you a Mitsu chart so that you'll know what I'm referring to. Even at the 18T's best choke point, that's about 38lbs/min. That's enough to do 350whp, but at over 2.5PR, (that's over 36psi of boost pressure). I doubt that the R is running that much boost to do that. 16-22psi, sure.. but not over 36psi..

Here you go. I'm not saying you're really wrong, I'm just saying.. check your source and make sure that you're talking power to the wheels , not Brake Horse Power, that's all.

MHI Turbocharger reference chart

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Even a 20T couldn't do 380WHP.

I think right about 350WHP has been done by PFI, not sure at how much boost (I think they were still at 23.5PSI). They changed the downpipe.


4Piston Racing also has some parts and head options now for the K20C1 engines, but if you're still limited to the stock turbo manifold or especially the turbo itself, I don't think you'd get much higher than what's already been seen.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

pfi dyno has fake numbers at least thats the rumor....they "compensate" for high altitude. they do show uncorrected value but not what correction that they are using.


makes 250 uncorrected. math says there using 1.4 correction but hard to say how accurate this is

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Their dyno is legitimate. Kyle from Boostedboiz has dyno'd his Civic on the PFI dyno and then within a week on a different dyno without changing anything, and his WHP results were within like 1-3 WHP of one another. Brent tuned Garrett/Cletus McFarland's 1200+WHP shelled Corvette recently as well just doing a road tune and the results were impressive (no dyno numbers to compare it with, but that's a pretty high standard to work with and be successful with for on the fly road tuning at elevation).

They also tuned the K-Swap Hondaru on a third party dyno after the PFI shop location had to close down, with Brent again doing the tuning, and it came out with crazy results. If they're fudging the numbers, it's not by much.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Td04 turbine wheel is much smaller from td05 right?
Im saying if its really a 4646 sized turbo it would work TOO hard for that 322 hp of the type r. Not for the number achibed but for the reliability of the turbo... Just saying.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Agreed, but so far I haven't heard of too many premature failures on these turbos. Again, I'm very interested as to what the actual size is.

In the video I linked above they also mentioned that the turbo has no special bells and whistles. Still a cast compressor wheel. 23.5PSI is pretty high for a factory car, and would be on the upper limit of the usable threshold on the turbo, but the power outputs still seem pretty impressive for what's going on.

I'm assuming having 2.0L of displacement and (I'm assuming) an efficient cylinder head with almost 11:1 compression is helping as well.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Yeah, yeah, Kyle X, Brent Y, Cletus X. No one knows these people , and its irrelevant to the issue. Good tuners don't care about numbers, as it doesn't matter. Driveability, repeatablity, and precision are needed. If it makes X vs. Y, the people themselves don't affect the number itself.

I think that we need to know simple SAE correction. that's always been the standard of measurement accounting for as many factors as the sensors deem available.

Yes, the Td04 turbine wheel, (which comes in about 2 main configurations/blade counts) is smaller than the TD05. Since MHI nomenclature can be really ugly with a lot of generic naming for some parts or all of the turbocharger, it's hard to tell what's really there until I can get another one apart.

You're not seeing the ones that are reported. Those that have failed were mainly those that were in factory condition in racing environments. There are plenty that have been destroyed by those using the platform to race them. So far, all have replaced the entire unit, and made no tweaks to the turbo. Customization is getting there, but right now, it's rather slow. due to lack of usable cores available to third-parties.

The 11:1 compression helps with the engine being to get to the correct dynamic compression more quickly, but it doesn't change the amount of boost pressure by that much to the point of where a turbo of this general size wouldn't still already be within it's CFM choke point, and change numbers significantly. So, we'll need to see when folks get their hands on them.

As stupid as it may seem to us enthusiasts here, many that do have possession of cores are keeping measurements under wraps until they can create an upgrade for release to those that can afford the platform upgrade. We have a general idea of what needs to be increased, and most will just put out a bigger turbocharger and either adapt it to work within the "headifold" as the original, or create something that uses the same housing configurations.. Time will tell.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

And how do you know the "third party" was not using correction? Just say in

per the video it made 250 uncorrected anything past that is speculation at best. As it's been said hundreds of times the dyno is just a tool hard to say exact numbers once correction comes into play

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

Like everyone is saying, it's just numbers. All I'm trying to point out is I don't believe PFI to be a shop that feels necessary to pad their numbers in order to appeal more to customers.

Off topic anyway. Apparently the exact specs of these turbos as of yet are unknown/unpublished.

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

haha I don't get compensation that's exactly what their doing....less power at that elevation so why make any corrections no correction would be as close as you can get to actual numbers

Re: Idle Curiousity - Anyone Know the Actual Dimensions of the FK8 TD04 Turbo?
 

It seems outside of the realm of the TD04 family I totally agree. Here is the car I was referencing assuming it is on OEM turbo, Humble Performance tuned it on Hondata (go to 8:15).