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Nacho Vidal

Rb25 Turbo Upgrade, All Dyno Results

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With so many threads about turbo upgrades for RB25's i thought itd be a good idea to start a thread that shows results only, as the results from various threads are scattered everywhere. Everyone has there own ideas about what power they want so obviously there isnt ONE perfect turbo upgrade for everyone.

Please post your RB25 dyno graphs only and state the following:

-Engine management

-Boost ran

-Fuel used (pump or special)

-significant engine mods (eg cams)

The idea of this thread is to be a quick reference to various turbo's performances on RB25's, not to be a discussion thread.


(If this has been done already let me know, but didnt come up one in search.)

Check (if you live in usa): Costco Weekly Ad, or Supercheap Auto Catalogue.

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HKS GT2530

Power FC

1.2bar (dropping to just under a bar at top end)

BP Ultimate 98

Straight thru cat pipe used for this run, and is the highest figure ive made with this turbo.

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And does someone have a rb25det hi flow dyno result that they would also like to elaborate a little bit more on.

I dug this up from an old thread heres the thread with talk on the hks2535,2540 & 3037.

Click me

And here is the hks test chart for 2510,2530 on rb20det and the rest 2535,2540 on a R33 rb25det.Very interesting and has helped me to answer some of my quetions.All tests are done at 1 bar of boost.

Click me

There is a larger range than that there too with tests done on other cars as well.

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here is my dyno results


3" exhaust

pod filter

10psi boost



BP Ultimate 98

stock standard turbo

We had an idling issue last week and to fix it the boys had to mess with the safc,

after getting the car to idle she ran 285hp but i didnt get a printout so i guess for this exercise i have 273hp

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221RWKW mongrel unknown spec turbo from Rigoli.

The build consisted of:

Arias Forged Pistons 1.0 mm OS (1300)

GTR rods with fresh bolts (400)

ACL heat treated race bearings (120)

Balance, clean and O ring block etc. including straighten of crank and lightening. (1100)

GTR fuel pump (180)

Malpassi Rising Rate fuel reg (120)

Standard head gasket (90)

Hybrid Monster FMIC (700) piping (120) new Mig welder (700)

Autohouse Tsukasaki PFC (secret)

Dump and front combo 3" with Fujitsubo "Jasma" 3" stainless system and racing cat also fitted.

Click Here for dyno sheet

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Engine management - PFC

Boost ran - 1.4 Bar

Turbo - Garrett GT30

500cc injectors

Bosch 044 pump


45mm Turbosmart External Wastegate

Custom Made Steam Pipe High Mount Turbo Manifold

Z32 80mm Air Flow Meter

HKS 600x300x76 Tube And Fine Intercooler

Custom 3inch Exhaust

HKS adjustable exhaust cam gearstock

etc etc etc

Fuel used - BP Ultimate

Stock Internals

The dyno graph i have is from MAS 04 as i cant find the selectamaz one where it went 324rwkw on a nice cool exterior located dyno.

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209.5kW 96 Series 2

Engine management - Stock ECU

Boost ran - 12psi

Turbo - HKS 2540

Fuel used - BP Ultimate

Stock all other internals.

Blitz DSBC 1st gen

Hybrid Front Mount

3" Exhuast from turbo back

Pod Filter

Stock BOV

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185.5kW 93 series 1

Engine management - Stock ECU

Boost ran - 0.9 Bar

Turbo - Stock

Fuel used - Optimax

Stock all other internals.

Apexi AVCR

Hybrid Front Mount

3" Exhuast from dump pipe back

Pod Filter


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1994 R33 GTS25t

Avcr - 0.8bar

Full zorst

Trust IC

Standard Turbo

Standard Ecu - no tuning or piggybacks

Automatic gearbox

180.3 Rwkw

Good strong power curve :burnout:

This was bout 3 months ago, shes a little different now :)

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not home atm so cant post up dyno

1995 gts-t r33

turbo back zorst with hi flow cat

pod+ cai

hybrid fmic


stock turbo

stock ecu

optimax fuel

hybrid bov

173rwkw on a 29 degree temperature at 7:30pm lol about 6 months ago was last dyno

new results in a week with power fc, avcr (12psi), z32afm


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94 gts25t

hks 2835

trust 35mm gate


hks exhaust manifold

wolf plug in

440cc injectors

pump fuel

walbro pump

stock internals


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1994 GTS25t

Hybrid TO3/TO4E (high flowed too - back cut ex wheel etc)

CP Forged pistons (8:1 CR)

Grex 1.6mm HG

ARP rod bolts

Port matched manifold

550cc inj and custom top feed rail

Malpassi reg

044 pump

K&N and custom inlet piping (nil AFM)

LT12 Microtech



Full 3" exhaust

The list could go on a LOT longer!

Also now have HKS cams (256 / 264)

Dyno pre HKS cams

Boost - Drops away to make peak power of 299.1rwkw @ 1.3bar

Dyno post HKS cams

Boost - Drops away even worse now! 270rwkw @ 1.1bar

Wanted - more $$$ to get a bigger turbo, run 1.5bar and make 300++rwkw :)

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1995 gts-t

Stock turbo


gtr fuel pump

adj fuel press reg

3'' catback exhaust


Pod filter+partion

Small Hks front mount

Slipping stock clutch,leak in header/exhaust gasket.Cant remember what boost it ran...

12:1 afr's



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Series 1

Stock turbo

Stock ECU

Stock cooler

Ran 12psi,

Cat back 3 inch

K&N pod

made 160rwkw

hoping to better than with new engine :)

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R33 gtst

Series 1

Stock turbo

Custom Dump pipe (Seperate wastegate pipe blended in), Hi flow cat manderal 3''

Stock ecu

Blitz LM cooler

8psi boost

K&N panel

Shootout mode dyno dynamics 175RWKW

Leaning out so couldn't rev out

AFR's went to 13.1 so backed off at 4900rpm

Will dyno in jan with pfc, pfc boost controller, upgraded fuel pump/nismo press reg.

This thread is great!

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gcg st.1 450hp high flow turbo . gtr front mount cooler

aftermarket manifold, ces racing 3inch split dump, 3inch cat and exhaust.

link ecu, malpassi rising rate reg.

stock internals and stock cams.

224rwkws at 17.5psi, with more power to come just need new coil before i can run more boost. 224rwkws at 1.2bar shootout mode, dont have scanner to post sheet.

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