Old Tech Turbo Replacement Options, Outputs And Fitment

[Tonba]

I vote for HTA3582R with a T4 1.06 A/R divided rear housing OR EFR8374 with T4 1.05 A/R divided rear housing.

Both will get you full boost faster then any other 62mm inducer / 82mm exducer compressor on the market, not to mention the transient response + power you would make!

The EFR will have much better transient response / boost recovery but requires you to get creative with packaging / fabrication as the turbo is an odd shape. Both are similar price to one another.



The other option is to go even bigger, HTA3586R with a T4 1.06 A/R divided rear housing... but as they say, pick your powerfigure, then pick the smallest turbo that will do the job. I think this would just be too big, and you will loose responsiveness.

Edited July 16, 2013 by Tonba

[Lithium]

I vote for HTA3582R with a T4 1.06 A/R divided rear housing OR EFR8374 with T4 1.05 A/R divided rear housing.

Both will get you full boost faster then any other 62mm inducer / 82mm exducer compressor on the market, not to mention the transient response + power you would make!

The HTA3582R is actually a 59mm inducer - only a little larger than that used by a GTX3576R, so the highest flowing sub 60mm compressor you are going to find, comparable flow to some 61+mm inducer turbos but responsive for it's size too. Its performance balance is very easy to underestimate, much like the HTA3076 which 34GeeTeeTee has now got results which prove the fact.

[Tonba]

The HTA3582R is actually a 59mm inducer - only a little larger than that used by a GTX3576R, so the highest flowing sub 60mm compressor you are going to find, comparable flow to some 61+mm inducer turbos but responsive for it's size too. Its performance balance is very easy to underestimate, much like the HTA3076 which 34GeeTeeTee has now got results which prove the fact.

My bad! I was thinking of the HTA86 compressor inducer specs! woooops!

But yes, it is pritty much on the same playing field as 61-62mm compressor inducers in flow!

[abr33]

So many options :-/

[Lithium]

So many options :-/

Not the worst problem you could have :-)

[hypergear]

Well I'm not convienced that you can get full boost with a gt35 rear ended turbo to spool on a stock rb25det with factory head, cams and cam gears to reach 24psi before 4000rpms and crack 400rwkws. I have already trailed that using a tinny 52t 71mm comp wheel. It doesnt reach 20psi till 4400 rpms. That was in a .63 rear also. So you are not going to get any thing more responsive then that by switching to a larger compressor wheel and bigger rear turbine housing.

As for the ss3. I can give you some comparison with other branded turbos from trents dyno which will give u an idea of where it sits.

[Tonba]

I'm not overly convinced you need 24psi to crack 400kW on E85 with a HTA3582 or EFR8374.

Look at 34GeeTeeTee's car. Even smaller turbo, HTA3076 and it is hitting well before 4k rpm, and almost touching 400kW. One of the two turbos I mentioned will hit the required power figure, and in a proper divded setup, it will get the response / midrange required.

[Lithium]

Well I'm not convienced that you can get full boost with a gt35 rear ended turbo to spool on a stock rb25det with factory head, cams and cam gears to reach 24psi before 4000rpms and crack 400rwkws. I have already trailed that using a tinny 52t 71mm comp wheel. It doesnt reach 20psi till 4400 rpms. That was in a .63 rear also. So you are not going to get any thing more responsive then that by switching to a larger compressor wheel and bigger rear turbine housing.

As for the ss3. I can give you some comparison with other branded turbos from trents dyno which will give u an idea of where it sits.

That would be interesting to see

Here's a stock head RB25 (OEM cams etc) with a .63 GT3582R hitting full boost by 4000rpm:

[Lithium]

I'm not overly convinced you need 24psi to crack 400kW on E85 with a HTA3582 or EFR8374.

Look at 34GeeTeeTee's car. Even smaller turbo, HTA3076 and it is hitting well before 4k rpm, and almost touching 400kW. One of the two turbos I mentioned will hit the required power figure, and in a proper divded setup, it will get the response / midrange required.

I'm not talking about the turbo themselves, I am talking about the engine they are attached to - 34GeeTeeTee needed cams to get near 400kw on 24psi, I suspect he would have surpassed 400kw with a larger turbo as I think the HTA3076 is very near it's limit at that point... I also think that without the upgraded cams I think he probably would have fallen short of his current power figure, too. Hard to say to be sure, though.

[Tonba]

^ Agreed..Its all about the combo.

My point is that; Is staying with stock cams REALLY a must?

In saying that, I have no doubt that the two turbo's I mentioned will meet performance requirements.

Edited July 16, 2013 by Tonba

[hypergear]

The dyno reading above does not shown any boost plots. And by looks its not any where close to 24psi.

Let's put it in this way. The ss3 alpha is a 3071 down low and 3582 up top. If you believe 3582 can pull 400rwkws on stock cams then that is what you are seeing.

On the same time the ss2 alpha makes 22psi by 3500rpms and make 385rwkws. And I guess you don't believe stock response 320rwkws either. They are all on stock cams, ans the profile in the turbo are bigger then what u have in mind.

The intergration of the technology is new, so no one yet owns one. More results is just a matter of time.

[Tonba]

Back at the OP - Can you please post a list of all supporting modifications?

[Lithium]

Let's put it in this way. The ss3 alpha is a 3071 down low and 3582 up top. If you believe 3582 can pull 400rwkws on stock cams then that is what you are seeing.

On the same time the ss2 alpha makes 22psi by 3500rpms and make 385rwkws. And I guess you don't believe stock response 320rwkws either. They are all on stock cams, ans the profile in the turbo are bigger then what u have in mind.

The intergration of the technology is new, so no one yet owns one. More results is just a matter of time.

I don't believe a GT3582R will make 400rwkw on stock cams on 24psi - as I believe the engine with stock cams is the limitation at that pressure ratio.

[hypergear]

Well then, I'll be happy to print you some results.

As for OP, using the Alpha turbine system, I can work with your current CHRA and knock off about 1000RPMs of its current lag without altering the peek power of the turbocharger.

[34GeeTeeTee]

Well then, I'll be happy to print you some results.

As for OP, using the Alpha turbine system, I can work with your current CHRA and knock off about 1000RPMs of its current lag without altering the peek power of the turbocharger.

Do that with a HTA and you will be on boost at idle

[methz]

how does trents hub dyno compare to roller dyno figures around the vic area stao?

[34GeeTeeTee]

how does trents hub dyno compare to roller dyno figures around the vic area stao?

This is something we would all like to know, a comparison was going to happen at some stage but not sure of the progress

[abr33]

Well then, I'll be happy to print you some results.

As for OP, using the Alpha turbine system, I can work with your current CHRA and knock off about 1000RPMs of its current lag without altering the peek power of the turbocharger.

Elaborate please? CHRA?

Back at the OP - Can you please post a list of all supporting modifications?

Well bottom end, balanced and blue printed crank, eagle rods, cp pistons, oil pump and all the irrelevant to topic stuff, head is lightly ported and polished, manifolds matched, plasmaman inlet, big fmic, custom exh manifold, 3 inch exhaust, 555 nismo injectors and 4 inch turbo intake.. I think thats what matters here?

[Tonba]

Have you thought about cams - before you go looking at a turbo or while you choose a turbo system?

[abr33]

And how about the off boost effort of these mentioned turbo's in regards to say being in 5th at 3k doing 110-120 and flooring it? the t04z makes about 4-5 pound at 3k and 100kw, but 2000 revs later its well over 300kw.. what do these all make by 3k power and boost wise?