Rb26 Turbo Upgrade, All Dyno Results

[alexj]

HKS 2.8 (86.5mm), Tomei Pon Cams
Precision GEN2 6266 Twinscroll, 1.5bar/22psi
98RON Shell VPower, 660cc injectors, HKS in tank pump

611hp/455kw at the rear hubs at 6600rpm , 510lbft at 5200rpm

Before we built the 2.8 this turbo made 577hp at 1.2bar/18psi on a 2.6 with 87.5mm pistons (basically 2.7) with similar response.

[drunken0elf]

1991 GTR 

- stock RB26DETT (shows signs of a refresh but can't confirm)

- gt2860-5 twin turbos

- stock injectors

- HKS green mushroom intake

- 3in exhaust line

- HKS down pipe

Safe tuned at 356rwhp at 15psi.

(i will eventually upload the dyno curve once I get it by email)

 

 

[Darmanin10]

On 2/2/2017 at 11:10 AM, Darmanin10 said:

R32 GTR

gtx3576r with 0.83 rear housing
Tomei poncams & cam gears
1000cc xspurts injectors
3.5 inch exhaust 

344kw @ 22psi

 

Same setup, but now forged engine setup for track abuse.

Needs bigger injectors for more power, as they are maxed out at this level.

The RED line is cam timing before

BLUE  line is cam timing after

ORANGE line is high boost.

[gtrtank]

1991 R32 GTR

Stock motor, headstuds

Rebuild JDS Performance R32 Turbos, N1 exhaust wheel, billet compressor wheel

Midori 3" outlets

2.75" to 3.5" twin pipe

3.5" exhaust

Modded twin turbo pipe

HKS hard piping kit

Blitz front mount, size big

Radium fuel rail, 1050x injectors, walbro 450

Full AEM sensors w/Infinity

Custom intakes since MAFs aren't required anymore

505AWHP 398TQ @21 PSI, 5280 elevation

Really happy with the power for the small turbos! 

[Taha]

R32 GTR 

Pte 6466

270 tomie cams

Arp2000

Metal head gasket

 

Stock bottom end 

 

 

[GD51LA]

p

[UMZenki]

1992 R32 GTR

HKS GT-LC low mount twins (Unknown specs. Would love more info on these but can't find it!!!)

Haltech PNP on stock MAP sensor

Stock Intake

Stock Dump Pipes, Blitz Front Pipe, 3" Test Pipe, Fujitsubo 3" Catback

DYNO GRAPH 

(Red Line: 408HP, 356 lbft; 16-18psi, 91 octane) [Blue line is Jap tuned ECU on 101 octane]

Next Steps (advice welcomed):

Greddy MAFless pod filter and pipe intake kit

HKS Cam Gears

Tomei turbo outlet pipes

ID1050x injectors

External MAP sensor

Walboro 450 fuel pump and rewire

Greddy 12 row Oil cooler and Filter Relo

HKS SSQV BOV kit

Twin Plate Clutch (Nismo Super coppermix or alternative)

ARP head studs

Metal head gasket

Possibly E85

Shooting for 550hp before i run out of puff from the snails.

 

Edited December 13, 2018 by UMZenki

[sleptema]

N1 RB26
Poncams
-7s
Haltech elite 2500

427hp on 98

507hp on e85, somewhere around the 21 psi mark. Boost solenoid was on max duty.

Will be back with a high mounted GTX35.

Edited December 20, 2018 by sleptema

[djvoodoo]

On 12/20/2018 at 7:17 PM, sleptema said:

N1 RB26
Poncams
-7s
Haltech elite 2500

427hp on 98

507hp on e85, somewhere around the 21 psi mark. Boost solenoid was on max duty.

Will be back with a high mounted GTX35.

What version of Poncam's are on this? -7's seem to be on quite late. 20 psi at 5000rpm?

[sleptema]

On 1/24/2019 at 11:25 AM, djvoodoo said:

What version of Poncam's are on this? -7's seem to be on quite late. 20 psi at 5000rpm?

No idea TBH

[rb30gtr]

Engine - Stock Rb26 Bottom end

Head - Tomeii type b poncams & tomeii adjustable cam gears. Brian Crower springs, supertec valves and guides

Turbo's - Twin factory mounted TD05-18g's, billet wheels with billet actuators

Brain - Nistune, turbosmart eboost street

Exhaust - Stock ex manifolds and dumps, Nismo front pipes then high-flow cat to 3.5 inch exhaust straight through to cannon

Fuel and supply - 98 PULP, 1170 xspurt injectors, nismo fpr, 450lt/hr pump

Intake/Cold side - Nismo AFM's, stock everything else stock including airbox, intercooler, blow off valves, piping and inlet mani

352kw's at the tyres on 19psi. Quite laggy but not as bad as expected, full boost hits just under 5k, 5 degrees adv on inlet cam, 2 on exhaust picked up heaps of mid-range. Very happy with the result, Mark from MRC worked his magic again, I was very nervous about those turbos, the stock airbox and exhaust manis/dumps but all and all it's great! I'll post a graph up shortly.

[Griffin]

Are these t517z turbos?

[HarrisRacing]

What version of Poncam's are on this? -7's seem to be on quite late. 20 psi at 5000rpm?

On an intertia dyno I could see this being the case. -7 are significantly later on threshold and lag compared directly to 8374 efr single FYI all

[rb30gtr]

Very similar, they are Mamba turbos. So non bb cartridges wich would be the only real downside other than the size for the 2.6. Be interesting to see them on a 3.0+

Are these t517z turbos?

[JDM33R]

R33 GTR
Clicked 100,000kms on a budget built 2.6 on an old Power FC with 255rwkw so decided it's finally run in and went single turbo. [emoji23]
-proboost gtx35
-ETM manifold
-50mm turbosmart wastegate (18psi spring)
-1000cc Bosch injectors
-walbro 460
-standard cams
-adaptronic ecu
E85 of course

Manual boost tee maxed out, one slight turn and it just overboosts,
Needs a proper boost controller.

376.4kw on 23psi
Tuned by Jez

[rb30gtr]

13 hours ago, JDM33R said:

R33 GTR
Clicked 100,000kms on a budget built 2.6 on an old Power FC with 255rwkw so decided it's finally run in and went single turbo.
-proboost gtx35
-ETM manifold
-50mm turbosmart wastegate (18psi spring)
-1000cc Bosch injectors
-walbro 460
-standard cams
-adaptronic ecu
E85 of course

Manual boost tee maxed out, one slight turn and it just overboosts,
Needs a proper boost controller.

376.4kw on 23psi
Tuned by Jez

Any chance you ran a 98 tune also?

[JDM33R]

Any chance you ran a 98 tune also?

Nah sorry man.
Would think E85 made roughly 50rwkw more.
The 255rwkw tune was one 98 if that helps.

[OzGTR33]

Gt2860-5

E85

Standard Cams

Link G4+

(The heartbeat lines in the high rev range is the Attessa kicking in and out)

Edited June 18, 2019 by OzGTR33
brackets

[mr_rbman]

Forged RB26 (Sleeved block, 87mm Pistons, rods, rod bolts, head studs, N1 oil pump with billet gears, Tomei sump baffle, Tomei metal head gasket etc...)

-7 turbos rebuilt with larger billet wheels

Nistune ECU (Latest update - Flex Fuel, Boost control etc)

Standard Exhaust manifolds and intake piping (Port-matched to suit bigger wheeled turbos)

1250cc Injectors

460LP/h fuel pump

Nismo AFM's 

Standard Air-box with CAI and K&N panel filter

Splitfire Coil packs

Kelford L182a cams

Greddy cam gears

Plazmaman 76mm intercooler

 

391rwkws @ 24psi (how it's driven) E85

417rwkws @ 26psi (airbox just cracked open) E85

335rwkws @ 20psi (how it's driven) 98RON

 

[Paul T]

RB 28 with GTX3584RS used as Track car

HKS step 2 2.8 full counter rank rods and pistons

HKS 272 exhaust cam

HKS VCAM Pro with 10.2 lift

Ported head - ferrera valves etc

Peterson dry sump running vacuum

N1 block

Nismo Plenum

Modified ITB's 

6 Boost stainless steel Promod manifold (Small runner)

GTX3584RS

1.21 rear housing

E85

Runing through Sachs carbon carbon clutch and flywheel (3kg)- Albins straight cut transmission and Nismo diff

stopped at 26 PSI 562 RWKW  was 420 KW at 13psi   705 ftlb torque.

 

Have posted so anyone thinking of using this turbo can see the results. 

Probably a better choice would be the precision PT6870 or 6875  with a large runner manifold

 

 

 

Edited June 30, 2019 by Paul T
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