Info on Apexi RX6 kit

[OBES]

Hey all.

Thinking about buy an Apexi twin RX6 kit for my GTR and are struggling to find info on the set up. Anyone have any info they could help me out with or where i could find some?? Just wanna know spec's/sizing on the turbos and what sort of power there able to help sustain/boost levels, etc..

Cheers,

Mick.

[TurbostyleR]

There are different variations of the RX6 turbo.

Im using an RX6B hybrid - RX6B rear wheel and housing with a machined front housing and larger wheel (~67mm) and one of those on my stock motor (SR20DET) silvia weighing at 1250kg is pulling 124mph trap speeds on 18psi which is somwhere in the 360rwhp range i believe...

boost starts building at a healthy 4000rpm (about 3-5psi) and by 5200 im at ~18psi...

[OBES]

Anyone else got any info??

[sagelwwa]

Anyone else got any info??

Thread back from the dead

I have an R32 GTR with the Apexi RX6 "Isamu" Twin Turbo kit. I am trying for the life of me to figure out how to get response out of this kit. It was on the car when I bought the car and the car is tuned with HKS F-Con, nearest HKS tuner is very far away so I am pretty much stuck with this setup for now. Any tips? For some reason I am unable to make over 16-18psi with either Apexi AVC-R or Blitz SBC i-Color (maybe wastegate issue?). Boost range is about 5500+rpm. 437whp on current tune, all top end.

Is there anyone else out there using this kit on the street that can offer some pointers or wants to work together on some ideas?

[Nee-san]

Thread back from the dead

I have an R32 GTR with the Apexi RX6 "Isamu" Twin Turbo kit. I am trying for the life of me to figure out how to get response out of this kit. It was on the car when I bought the car and the car is tuned with HKS F-Con, nearest HKS tuner is very far away so I am pretty much stuck with this setup for now. Any tips? For some reason I am unable to make over 16-18psi with either Apexi AVC-R or Blitz SBC i-Color (maybe wastegate issue?). Boost range is about 5500+rpm. 437whp on current tune, all top end.

Is there anyone else out there using this kit on the street that can offer some pointers or wants to work together on some ideas?

Where abouts are you ?

and I get the feeling that your not really pushing that turbo combo thus far and the RX6 family are not small turbos so you probably just have a sizing issue.

Edited September 8, 2010 by Nee-san

[bigmikespec]

Depending on what exact kit you have you are looking at a turbo kit that can support over 1000hp so no wonder why it is unresponsive. I would sell the whole lot and keep one of the turbos and run it as a single!

[paulR32gtr]

Pretty sure Atomicbomberman has gone with an RX6 - can't remember if he went up to 2.8 though.

http://www.skylinesaustralia.com/forums/Bo...il-t272773.html

EDIT: Sorry no he is with AX's

But if your having problems making boost and response is sluggish I would definitely be looking at the wastegates. Try without the stupid EBC's - a pipe with a good old fashioned bleed hole in it - be careful not to overboost obviously.

[STATUS]

i bought the first rx6 kits in back in 2000, the original kit ended up being sold to JMS and went on danny's r33, which then got sold to mark phillips (legend too btw). Some of the best turbo kits around. But twins on the gtr (named the V-max SPL kit) is realistically 1000-1200odd horsepower, a single rx6 rb26 kit is good for 500-600hp

i remember sourcing the smaller rear to make it more responsive on mark car, i got to drive this setup at mallala one drift event (i was shit scared of damaging it so i sucked bigtime) and the car was a real weapon made killer power yet responsive to boot.

Have a look at the turbos as the rear housings sizes are p13 being the smallest to p27 being the largest.

The frame will be a TCW number and i do have some compressor maps for the TCW77, TCW76, TCW15 and the baby TCW10

[paulR32gtr]

Yeah I was gonna say - those RX6's are monsters! No wonder your having trouble getting them to huff with two of them!

[sagelwwa]

Where abouts are you ?

and I get the feeling that your not really pushing that turbo combo thus far and the RX6 family are not small turbos so you probably just have a sizing issue.

I am located in the United States, near Charlotte, North Carolina.

I just got the car recently. I traded a GT3076R STi (406whp) for it. The STi had amazing response and drove like a dream on the streets. It took me a few drives to get anything out of the R32 as the cars drive so differently. Babying the GTR wouldn't work like on the STi which would get up and go very quickly, so I quickly realized I had to show the car who's boss lol. Getting up into the 5500rpm range, I finally believed the previous owner who claimed 436whp on the dyno. The only problem was the lag and mismatched setup for the motor which is bone stock except TOMEI Poncams Type-B.

[sagelwwa]

Depending on what exact kit you have you are looking at a turbo kit that can support over 1000hp so no wonder why it is unresponsive. I would sell the whole lot and keep one of the turbos and run it as a single!

I have actually thought about running ONE of these and keeping the other for a spare. That would be feasible to try if only the flanges weren't so darn hard to work with. If someone knows where I can get an affordable non-custom single turbo manifold to suit one of these please tell me! haha

[sagelwwa]

Pretty sure Atomicbomberman has gone with an RX6 - can't remember if he went up to 2.8 though.

http://www.skylinesaustralia.com/forums/Bo...il-t272773.html

EDIT: Sorry no he is with AX's

But if your having problems making boost and response is sluggish I would definitely be looking at the wastegates. Try without the stupid EBC's - a pipe with a good old fashioned bleed hole in it - be careful not to overboost obviously.

I was considering swapping out the wastegate, but again, flange issues. It is a 52mm wastegate with 51mm flange. Not much out there will swap into its place. I also was thinking about it more and realized that this kit performs sluggishly by nature on a stock 2.6L so the wastegate is not likely bad anyway.

[sagelwwa]

i bought the first rx6 kits in back in 2000, the original kit ended up being sold to JMS and went on danny's r33, which then got sold to mark phillips. Some of the best turbo kits around. But twins on the gtr (named the V-max SPL kit) is realistically 1000-1200odd horsepower, a single rx6 rb26 kit is good for 500-600hp

i remember sourcing the smaller rear to make it more responsive on mark car, i got to drive this setup at mallala one drift event (i was shit scared of damaging it so i sucked bigtime) and the car was a real weapon made killer power yet responsive to boot.

Have a look at the turbos as the rear housings sizes are p13 being the smallest to p27 being the largest.

The frame will be a TCW number and i do have some compressor maps for the TCW77, TCW76, TCW15 and the baby TCW10

Nice videos! the turbos have P20 housings I believe. Is it possible to source smaller housings still? I had not thought about that, but that is a very good idea. Any direction you can offer on that would be very appreciated! What size housings did you end up using?

Also, my kit is called the V-Max SPL Kit? Did I read that right? If so, thats good to know!!

[sagelwwa]

Attached are pics of the engine bay and a pic I found of the kit from eBay Hong Kong! Gold!!

(previous owner didn't have intakes anymore, so that's another issue to deal with)

More pics of my R32: http://www.flickr.com/photos/upscaleauto/s...57624745250433/

GT3076R 406whp STi: http://www.flickr.com/photos/upscaleauto/s...57624745066001/

370Z I am selling: http://www.flickr.com/photos/upscaleauto/s...57624212686723/

Edited September 9, 2010 by sagelwwa

[sagelwwa]

Would the housings from Power Enterprise work? http://www.powerenterpriseusa.net/products.../RX6R/rx6r.html Scroll to bottom to see them. They are pricey, but the only thing I can find so far. Hoping someone else has a good source for replacement housings I can use on these turbos!

[bigmikespec]

Get a P27 housing and run it as a single, just need to get a manifold made up!

[sagelwwa]

Get a P27 housing and run it as a single, just need to get a manifold made up!

No Twin P13 setup? If STATUS was able to swap the housings and get good response, I'm hoping I can do the same. Just need to pick housings and find them I guess. All assuming I am reading STATUS's info right.

[bigmikespec]

Still a lot of turbo, if you want to keep them run the smallest housing you can... personally I do not see the point, either go for big power with the big twins you have, or use a single one with the largest P27 housing. A lot simpler and I would think a better option for 500-600hp.

[paulR32gtr]

Do you know what has been done to the engine internally?

It will need to be something special if you really want to get the most out of these two turbos. 476whp is barely getting started.

[sagelwwa]

Do you know what has been done to the engine internally?

It will need to be something special if you really want to get the most out of these two turbos. 476whp is barely getting started.

All its got internally are Tomei Type-B Poncams (260/260). Evidently the tuner couldn't get the boost over 16psi or 18psi (got conflicting info on this from owner and tuner). He switched the Apexi AVC-R to the Blitz SBC i-Color thinking that was the problem, but still not able to get boost over 16/18psi. He thought the wastegate had issues. I am thinking that the EBC might be hooked up wrong or a wild-shot that b/c the speedometer is broken, the SBC i-Color is not functioning correctly since speed signal is supposed to be hooked up and working with it. I doubt that is the issue though. It is either a wastegate issue or just the nature of this setup most likely.

I agree on the housings, it sounds tempting to just slap a housing on, but if I really want to get what I want out of the car, I need to just switch to a different setup. Maybe even all the way down to some 2510's or 2860's style turbos w/ internal gates. Otherwise, it would just be a single setup, maybe T04S 60-1. I could even buy a stock motor, take this whole motor and turbo setup out and build this motor while driving a stock setup. I really can't decide what to do about this. All I know now is I am stuck with a bad@$$ turbo setup and not enough motor. Something has to give and a 2.8L stroker setup can't be done overnight or within my current budget.