RB26DETT Huffer Upgrade

[Mik]

G'day Mik, so what sort of engine did or do you have these GTRS bolted to? Im looking at just a stock motor with tomei cams bigger injectors...PFC etc...

and what revs are you getting 1 bar boost at?

Stock motor with Tomei drop in cams. On the dyno, 1 bar comes up at about 4650, but target boost comes up VERY fast from there.

[pnblight]

ahh ok pete! I didnt know you had R34 N1's I thought they were the garrett equivilent of the HKS 2530?

anyhow Im still searching for a set of N1s or 2530s..... hmmm

I thought these were one in the same BUT i will know for sure when they come off and i will let you know as i am rapped with there around performance and believe these to be one of the best turbos for a street gtr.

[Mik]

I thought these were one in the same BUT i will know for sure when they come off and i will let you know as i am rapped with there around performance and believe these to be one of the best turbos for a street gtr.

Peter, do your turbos run A/R 0.60 comp housings? I'm pretty sure that the turbos that everyone calls "R34 N1" turbos only run .42 housings

[pnblight]

Peter, do your turbos run A/R 0.60 comp housings? I'm pretty sure that the turbos that everyone calls "R34 N1" turbos only run .42 housings

I know i have seen a thread on here with links to a site with all the nismo turbo specs on it but i just did a search and was unable to find it.

It showed the spec to the r32n1/r33n1 and the r34n1(ball bearing) and also had a couple nismo specials in there and the R34N1 was the largest a/r ratio turbo with a 0.60compressor and a 0.64 turbine (same as the 2530). Plus a young kid in buno took a shopping list from my car and bought all the same gear (r34n1) and these are 0.60/0.64 same as mine. I will keep trying to find the thread

[Mik]

I have a NISMO catalogue here..according to it, R34 N1 turbos have a T3 compressor with an A/R .42 cover. They are only rated at 2 x 280PS too.

This is the reason why we went for GT-SS turbos when we were in Japan rather than N1s.

[DAN00H]

I don't know why everyone seems to think this. The difference in lag between GT-RS turbines and 2530s is minimal.

because people with the stock engine are saying they are too laggy for street work!

[Mik]

because people with the stock engine are saying they are too laggy for street work!

Yet everyone raves about 2530s which have similar lag

[MSRB26]

so who can spell out which R34 N1 turbos are the "gun" 320hp variety.... Im after the serial number so I can plot my way through this maze of 34 N1 turbos (last count there are 4 types!)

BNR34 (N1) : 14411-AA403 have the .64 ex housing

[williamsf1]

sweeeet

[Mik]

BNR34 (N1) : 14411-AA403 have the .64 ex housing  

They all have the 0.64 ex housing...what comp cover do they have?

[MSRB26]

I don't think so, i think some have the .48 with steel wheels etc.

For the part number mentioned above the comp cover is .6

[gun-r32]

cheers all that's some good food for thought..though think I'll go the GT-SS, I keep hearing real good things about them, plus they fit the budget.

[Ants]

I'm currently getting my car tuned and I roughly want about the 300rwkw. It has the following:

Nismo R32 turbos - rated at 300ps each

RX7 Series IV Injectors - 550cc

RB20DET A/f meters

Standard fuel pump - (is going to restrict a lot of the power)

HKS Cam Gears

Will let you know how it goes.

[Sydneykid]

Yet everyone raves about 2530s which have similar lag

In my experience, no, they don't. A few facts, we get 1 bar out of the 2530's at under 4,000 rpm on the RB26. The GTRS moving parts (compressor, shaft and turbine) weigh 25% more than the 2530 moving parts. So there is simply no way that they can be as responsive, given all else being equal.

This experience is not unique, the 2 fastest GTR's at Tsukuba again this year where both running 2530's. If the GTRS's where as responsive and made more power, I am sure the unlimited budgets would have funded them.

[600hp]

in my experience the 2530's come on about the same as stock turbo's(3500rpm), were as cars wich have GT-RS's kick hard at 5000rpm.

[DAN00H]

I'm currently getting my car tuned and I roughly want about the 300rwkw. It has the following:

Nismo R32 turbos - rated at 300ps each

RX7 Series IV Injectors - 550cc

RB20DET A/f meters  

Standard fuel pump - (is going to restrict a lot of the power)

HKS Cam Gears

Will let you know how it goes.

I've got similar to you and will be looking for about the same power

I've got 2530's

Sard 700cc injectors

HKS intank pump

HKS cam gears

PFC + HC

Looking to get a set of RB20/25 AFM's and HKS style split dumps then I can start to assemble it all

[DAN00H]

Yet everyone raves about 2530s which have similar lag

not from my research....

[Blitz]

Blitz...I don't think you can get the 2530KAI in T25 flange for RB26, can you?

There was a rumour that the kai kits were going to becoming available for the GTR, though admittedly I have only seen the KAI version of the 2530 available as a single item so far.

Might have a browse through the goodsmaster later.

[Ants]

I've got similar to you and will be looking for about the same power

I've got 2530's

Sard 700cc injectors

HKS intank pump

HKS cam gears

PFC + HC

Looking to get a set of RB20/25 AFM's and HKS style split dumps then I can start to assemble it all

I finally got my car tuned yesterday and got some fantastic results. The power I got is 297rwkw with standard fuel pump and a/f meters. I could not believe my eyes nor could my tuner. I did however put 550cc injectors on.

The power curve is just senstational; and the car pulls like a freight train. It is very progressive and goes all the way to 8000rpm.

I'm so pleased with the results that I will get used to the power first and then add a bigger fuel pump and a/f meters later.

I will post up pictures of the power curve very shortly.

[180bfj20det]

I will post up pictures of the power curve very shortly.

Here is the dyno graph for Antz car. I took a pic of them yesterday. The dyno reads 10% and reads 360rwhp = 396rwhp taking into consideration10% loss. This works out to just under 300rwkW and Im sure if we were to run the car on a calibrated dyno that it would read 300rwkW.