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Discussion Starter #1
Hello everyone,
I am trying to figure out the compressor inducer and exducer dimensions for the hks t51r, the regular one, the kai, and the spl, as well as the compressor dimensions for the to4r. Rough estimates are fine. I want to know how big the compressor size is on these turbos in millimeters.
Is the to4 around 62 mm. and the t51 at 65 mm?
Thanks,
namahs
 

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CHeck with Phil on the T-51r and I think the guy who dynoed before you at engineered at the last meet had a t04r...actually, if you go to to4r , the should have the info you're looking for on that turbo, at least
 

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Dan,
Not able to answer your question directly since I don't know the compressor dimensions in mm. I can tell you that the T04R is *very* comparable in terms of power output to the turbo that you are currently running. Definitely wouldn't be worth a swap.
However, the T51 is significantly larger than either the T66 or the T04R. Ultimately, this turbo is capable of considerably higher flow then either of the others mentioned.

I assume that you are asking 'cause you are thinking of upgrading?

Don't know the specifics on the different variations of the T51R, either (SPL vs. KAI). Sorry. :(

BTW, Phil's running the Fastrax T51 on his car. This is a customized version of the T51 built by John K at Fastrax.
I am sure that Phil can give you the specifics on his configuration.

Good luck with it.
K
 

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namahs said:
Hello everyone,
I am trying to figure out the compressor inducer and exducer dimensions for the hks t51r, the regular one, the kai, and the spl, as well as the compressor dimensions for the to4r. Rough estimates are fine. I want to know how big the compressor size is on these turbos in millimeters.
Is the to4 around 62 mm. and the t51 at 65 mm?
Thanks,
namahs
You need to be more specific....I'm not sure if we're on the same track, but here are the compressor wheel specs...
HKS T04R inducer 66.7mm/ exducer 84mm
HKS T51R KAI 70.3mm/94mm
HKS T51R SPL 76.5mm/102.2mm

Again, HKS's T51 has some sort of unique special built in anti-revisionary inlet (which I won't go into).... these important little features is what most people fail to recognize and think HKS products are overpriced.

Saiyonara
 

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Damn, I didn't know the SPL was that much bigger than the KAI.

Namas,

Do a search for the TO4R. Awhile ago I posted the specs of what garrett parts actually make up this turbo.

-amir
 

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forcefeed said:
Damn, I didn't know the SPL was that much bigger than the KAI.
-amir
Yeah, they actually both use the same 56 trim compressor housings, which is not much bigger than a T04R really. The KAI is rated at 800hp, the SPL is at 1000hp!
 

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Discussion Starter #8
Thanks for the specs. I can now enter these into my spreadsheet. I never thought that choosing a turbo would be this involved.
Dan
 

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Discussion Starter #9
Hey, do you know the turbine wheel dimensions that ship with the to4r, the t51 kai and spl. I know there are a few different turbine wheels for the to4r and only one option for the t51 kai and spl.
Thanks again
Dan
 

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Discussion Starter #10
Oh and another thing, what a/r sizes for the compressor and the turbine side ship with the t51 kai and spl.
Thanks once again,
dan
 

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Hey, do you know the turbine wheel dimensions that ship with the to4r, the t51 kai and spl. I know there are a few different turbine wheels for the to4r and only one option for the t51 kai and spl.
Though there are hundreds of different wheel combinations available for any turbo, HKS has found these to be the favorable choices in regards to standard upgrading for the Supra. Here are the Turbine wheel dimensions,
T04R --74.2mm./64.7mm. T-51's -- 82.0mm./ 71.4mm.

Oh and another thing, what a/r sizes for the compressor and the turbine side ship with the t51 kai and spl.
T04R compressor A/R is .70 The T-51's aren't available, maybe because of their unique anti-backflow chamber built into the housing or for proprietory reasons.
The LISTED T04R turbine A/R are .81,.96, 1.00. I've used the dualport .84 and found that to be a very good choice. Again there are many to choose from. The T-51's are 1.00 and they don't list any other combinations yet.:)
 
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choritsu-shi said:
Though there are hundreds of different wheel combinations available for any turbo, HKS has found these to be the favorable choices in regards to standard upgrading for the Supra. Here are the Turbine wheel dimensions,
T04R --74.2mm./64.7mm. T-51's -- 82.0mm./ 71.4mm.


T04R compressor A/R is .70 The T-51's aren't available, maybe because of their unique anti-backflow chamber built into the housing or for proprietory reasons.
The LISTED T04R turbine A/R are .81,.96, 1.00. I've used the dualport .84 and found that to be a very good choice. Again there are many to choose from. The T-51's are 1.00 and they don't list any other combinations yet.:)
What are the advantage or disadvantage in a T04R turbine for a .84A/R dualport vs the single port .81A/R?
Thanks
 

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jwkc said:


What are the advantage or disadvantage in a T04R turbine for a .84A/R dualport vs the single port .81A/R?
Thanks
This is from an earlier post...
Yes, I also agree....but there is a very important feature with the HKS header design(6 to 2) that hasn't been mentioned. Known as a "dual-port" or "split-port" design. This feature builds more velocity and creates a more reponsive and stable boost, especialy when used with a "dual port" turbine housing. This allows you to run a larger A/R turbine with great response without sacraficing your top-end. Not to dis-credit GReddy's quality, but on a "single port" design header(6 to 1), to reduce lag, normally you would go with a smaller A/R turbine housing. But this obviously reduces your top end and can also prove fatal. Smaller turbines are more restrictive and can create too much back-pressure and tremendous heat. This causes either pre-mature/permanent turbocharger damage or the excessive exhaust pressure/temperatures before the turbocharger(normally not monitored by most) can and will damage your motor. That smaller turbine housing may work great for that one 10 second run, but we're only talking about 10 seconds at one time....that isn't enough time to take a :piss: Doing five consecutive runs, with no waiting in line, will more than likely be cataustrophic. Taking just one lap around an average road course can easily exceed 1 minute. Though I'm not an expert nor do I claim to be of royalty, but through my experiences, do feel the boost in a "dual-port" to be more stable compared to a standard "single-port". Personally, if anything is to be considered under-rated it would be HKS's reputation....where you truely get a bigger bang for your buck.
Saiyonara
 
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choritsu-shi said:
This is from an earlier post...
In term of spooling ,will a .84 dual port more responsive that a .81 single port for a T04 R?
 
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