There are a lot of haters on here. Here are some facts.

The IHI turbo that comes w/ the EVO kit is the biggest one available.

Apexi RX6B TCW77L
Power (PS): 560
Ball bearing & water cooled
Comp trim: 55
Comp inducer (mm): 61
Comp Major (mm): 82
Compressor A/R: P21
Comp inlet (mm): 75
Comp. Outlet (mm): 63.5
Turbine Trim: 87
Turbine Exducer (mm): 57
Turbine Major (mm): 61
Housing A/R: P20
Flange Type: RX6B

This turbo is pretty close in size as a GT3040. It should also be noted that the Sparco EVO used the less horsepower TCW76L w/ a P18 housing. At one time it even used the TCW15L which is rated less then the 76L.

The one thing that I don't like about IHI is the lack of compressor and turbine maps. A ported shroud would be nice also. Then a smaller A/R turbine housing could be used.

 

It is funny you mention the lack of compressor maps. IHI would only provide us maps for some of the product line, not including the RX6B.

 

I wasn't really commenting on the CHRA, more on the wheels themselves. I'm certainly not putting down the IHIs and will admit freely that I know little about them compared to garretts, but was basically just stating that I was not impressed that the RX6's predecessors were developed in 1980's F1 racing. The thing I like about a lot of the newest GT series turbos (particularly the 28RS and 35R) are the turbine wheels. They have come a long way, especially the T-25 footprint NSF-111 in the RS and 2871R flavors which flows more than some of garrett's old-school T04 sized hotsides. I am also pretty impressed with the efficiency of the compressor wheels in many of the larger GT's at PRs over 3. Obviously vastly superior aerodynamics than their predecessors of only 10 years earlier.

 

Damn, you guys know alot of useless stuff..J/K...
I will be sure to let you guys know if i go through it, i am not a drager, and the kit may be overkill for the track.

Thnaks for all the input.

 

Are you sure you know what you're talkin' about here buddy?

 

definatly go with buschur...

 

Ciao , i'm Italian and at first i want say hello to everybody, This is my first reply. I own a evo VII RS with a lot of upgrade including the "isamu" turbo kit, this is my experience: the kit is really bolt on and i haven't problem in istallation all you need is in the kit, the first test was done on the engine 2000 cc but i wasn't really satisfied because the spool start at 4500 g/m , the max power was around 440 cv at 7500 g/m with 2 bar pressure (around 28 PSI). Next step was the stroker 2,3 lt and in this way really change the music ! we spend 2 day with my friend Nocentini ( is the owner of a world rally championship team) at the engine Dyno, was really interesting work on the apex ecu with fc-datalogit, chanche timing on the 272° in/ex hks cams, find the correct fuel pressure and more, the final result was this : 3500 g/m 20 psi 200cv; 4000 g/m 27 psi 360cv; 4500 g/m 30 psi 424 cv and max torque 672 N/m ; 7000 g/m 30 psi 524 cv max power.
All the test runs with fuel 98 oct , we did not rev over 7000 because the linear velocity medium of the piston with the stroker is gone very high + 12 mm.
Finally i don't have experience with other turbo kit but if somebody ask me if i'm satisfied with isamu i say yes! after 1 year i haven't manifold crack ( i'm touching my b****) .
Sorry for my english.

 

Once upon a time I worked for Power Enterprise and currently maintain a relationship with the company. So yes, I can provide some insight on the subject of IHI turbos and Power Enterprises fabrication and engineering skills.

 

MINES13, clearances are a bit of a grey area and within a range, a loose or tight clearance cannot be glorified or condemned. There are relatively loose clearances for maximum power (via reduced friction), and there are relatively tight clearances to maximize longevity. So you cannot draw such a conclusion just because IHI runs the tightest clearances you have ever measured. Designated oil spec also relates to how apt a clearance is.

Tolerances are a different matter altogether, and a zero tolerance is always a target.

I do not think IHI has anything over Garrett. It isn't fair to hold IHI so far over Garrett. Let's not forget Garrett runs / has run, 24 hours of Le Mans LMP and GT classes (including the most winning car in the highest LMP class in the last 5 years), Champ Car, WRC, 80s F1, top level drag.

Hasty condemnation or hasty glorification of a company without detailed technical inspection isn't healthy for a community.

 

Don't want to step on your toes, but as someone who does TIG, I would not want a "non-purged-gas welded manifold."

Are you sure you don't mean back purged welded manifold?

 

Ciao Nicco,

Thanks for the input. Your English is fine, its the numbers that lose me english to metric. Is the isamu turbo kit the same one we are talking about? Any chance of getting your hands on some good rally parts? pm me, I could use some.

 

I'll be getting this turbo kit installed and tuned within a month.

I will post up more solid information regarding HP and spoolup. It seems to be a very popular kit in Japan and other areas.

 

Those are famous last words, Krunal. You're a smart guy. You should know better than to base your purchase off such a thing, especially when you have all these known, proven turbo kits available right here in front of you at better prices.

 

youre right warr the apex-i rx6 kit isnt a known or proven turbo kit
^^WTF^^

 

WTF back at you . You've replied to a post that is over one year old. BTW, I've seen the Apexi kit up close and the fit and quality are amazing. My only concern is the mani, but that can be addressed with a few supports.