500 hp gtst

[all-Canadian11]

Hey everyone, im wanting to find out things that i would need to do to my engine/transmision to create a 450-500hp gtst. I am trying to go for both power and semi reliability.

A couple things i would like to have are a top mount turbo manifold, and a front facing intake plenum (makes the engine bay look alot nicer)
And a turbo with very minimal lag

if you guys could help with a list of things that would need to be done, along with approximate prices, that would be much appreciated.

[GTRADDICT]

rb25 + GT35 + supporting mods. Your looking around 10-15 K I would say. Depending on your sources

[Skym]

If RB20DET, 400hp is enough for street use and limit of stock gearbox -

http://www.youtube.com/watch?v=_1JlZNPI6MQ

For 450-500hp, copy BigRed -

http://www.youtube.com/watch?v=5R5YB7IZTQw

Bigred has around 547hp at engine with RB25DET engine, RB25DET gearbox, GT3540 turbo, etc in R32 GTS-T chassis -

http://www.youtube.com/watch?v=WsKMDWiw5Pw

Search with "Adz32", "Bigred" on SAU forum, as should have the list of mods.

If going that far, best to buy a R33 25T with RB25DET engine, drivetrain as stock equipment and build that up to 450hp-500hp.

For around 466hp at engine (17psi??) on stock RB25DET engine, full boost at just over 3500rpm -

GT3076R turbo on stock exhaust manifold with internal wastegate exhaust housing (56Trim, anti-surge compressor cover, Garrett GT30 .82 a/r turbine housing), custom 3" dumppipe
Custom hard pipe intake pipe with silicon hose joiners, worm drive clamps, podfilter
600x300x76mm FMIC
3inch dumppipe, front pipe into 3.5 catback exhaust
Aftermarket BOV (Synapse, HKS, etc)
550cc Deatchwerks injectors
255lph Nismo fuelpump
Link G4 ECU, IAT sensor, boostcontrol solenoid, ViPEC ECU, PowerFC, etc
Upgraded Clutch (Excedy Sports Tuff HD clutch, Nismo single plate clutch + Nismo flywheel, etc)

Turbo can be bought from ATP turbo -

http://www.atpturbo.com/

Deatchwerks injectors -

http://www.deatschwerks.com/catalog/index.php?cPath=0_24_44

[BrianV8]

I did the following to my gtst to make that power. I went big on the bolt on in hopes to play with internals one day.

Stock rb25DETT s1 motor swap with rb25 trans
arp head studs w/ stock replacement head gasket.
walbro 255l fuel pump
sard fuel pressure regulator
godspeed topfeed fuel rail conversion
rc racing 550 cc injectors
shimmed rear diff
holset hx35 turbo
godspeed top mount manifold
tial 38mm waste gate
custom 3" exhaust
z32 MAF
Tomie Timing belt
N1 oil pump
front mount with 3" pipe
q45 throttle body
godspeed side mount plenum
yellowjacket coils
think thats all of it. maybe a few other insignificant bolt ons.

on the dyno made 380rwhp at 18 pounds of boost. Since the dyno added another 2 degrees of timing, water meth, and 3 more pounds of boost. Making around 430ish rwhp approx.

Been running her for 2 summers now no issues at all.

[all-Canadian11]

I would prefer to stick with my rb20, with that being said it looks like 400 hp is more achievable. If you guys could help me with a list of things that would need to be done to make this 400hp goal possible, or if you could point me to some people who have done it using the rb20 engine. thanks in advance

[BrianV8]

find everything i listed above as mods, plus this list
decent sized cam, possibly solid lifter conversion
race port,
forged pistons and rods,
arp every nut and bolt
high flow oil pump
acl race bearings,
if you really want to get crazy get a 2.4L stroker kit for the bottom end

think that would do it? Anyone else add?

The amount of money you will spend on bolt ons and internals you can buy an rb25 full swap and all the same bolts ons i did. I've gone through the list before i did my swap. Rb25 is far better bang for buck with much more potential

[Zacho]

Hey everyone, im wanting to find out things that i would need to do to my engine/transmision to create a 450-500hp gtst. I am trying to go for both power and semi reliability.

A couple things i would like to have are a top mount turbo manifold, and a front facing intake plenum (makes the engine bay look alot nicer)
And a turbo with very minimal lag

if you guys could help with a list of things that would need to be done, along with approximate prices, that would be much appreciated.

On an rb20, forget it.

Rb25, you will need a turbo that flows at least around 58lb/min(give or take, some quick math here). You want 500whp, you will have to deal with some lag. Want minimal lag buy a billet wheel ball bearing turbo.

Semi reliability - pistons/bearings/headstuds/oil mods at a minimum IMO. The ringlands on the 25 aren't very strong they are the first thing I would upgrade.

A list of what I would do:

Engine bearings
Forged pistons
Head oil feed restrictor mid/rear feeds
Intake plenum
Inspect oil pump/snout service as nessecary
Minor head work, tomei poncams(springs/retainers good idea as well)
Lovefab/Neukin/Greddy/FullRace/6boost manifold
Borg warner 83-75. Smaller comp inducer than a 35r but flows more
44mm + wastegate
Bosch 044 in-tank fuel pump
740+cc injectors + FPR to suit
Standalone ECU (no piggybacks) with a good tune. Run speed density to make life easier.
Addressing ignition, new OEM coils with a kenne bell boost-a-spark
Drivetrain you will need an rb25 trans. Need a clutch to hold the power. OS giken/ACT/whatever


Seriously, don't cheap out. I've learned the hard way enough times to know this now.

[BrianV8]

On an rb20, forget it.

Rb25, you will need a turbo that flows at least around 58lb/min(give or take, some quick math here). You want 500whp, you will have to deal with some lag. Want minimal lag buy a billet wheel ball bearing turbo.

Semi reliability - pistons/bearings/headstuds/oil mods at a minimum IMO. The ringlands on the 25 aren't very strong they are the first thing I would upgrade.

A list of what I would do:

Engine bearings
Forged pistons
Head oil feed restrictor mid/rear feeds
Intake plenum
Inspect oil pump/snout service as nessecary
Minor head work, tomei poncams(springs/retainers good idea as well)
Lovefab/Neukin/Greddy/FullRace/6boost manifold
Borg warner 83-75. Smaller comp inducer than a 35r but flows more
44mm + wastegate
Bosch 044 in-tank fuel pump
740+cc injectors + FPR to suit
Standalone ECU (no piggybacks) with a good tune. Run speed density to make life easier.
Addressing ignition, new OEM coils with a kenne bell boost-a-spark
Drivetrain you will need an rb25 trans. Need a clutch to hold the power. OS giken/ACT/whatever


Seriously, don't cheap out. I've learned the hard way enough times to know this now.

Two thumbs up rb25 FTW

[M13]

RB20 can do 500HP but the problem will be lag and reliability.

Not impossible, but not recommended.


When I do a swap I'll just go with a V8. (Nissan or Toyota V8)

[actionbstard]

for and rb20.Get your hands on some RB26 rods,cranks shaft and 4ag pistons.Doesn't take to much at all.
For a rb25 get in touch with with this guy.
Great guy and is pushing those numbers on pump gas

http://forums.gtrcanada.com/parts-sale/42290-r33-parts-4-sale.html

[Skym]

R32 RB20DET is fairly simple for 400hp at engine -

Tomei Poncams
Tomei 80.5mm bore, 1.2mm metal headgasket
ARP head studs
Nissan repair gasket kit
New Coolant, New cambelt, New idle + tensioner bearings, new waterpump, liquid gasket, new mounting bolts for bearings
HKS GTRS turbo + HKS internal wastegate actuator or GT2871R with Ford T3 exhaust housing + swinggate assembly, which I think is Garrett equivalent to GTRS turbo.
HDI tube N fin FMIC
HKS or Blitz boost controller
Custom intake pipe to turbo, custom 3" dumppipe off back of turbo, custom intercooler piping
Custom oil, water feed to turbo
Apexi podfilter
Full 3" exhaust
Nistune for stock ECU + Nistune individual tuning software license + Consult cable
Z32 MAF + tail (MAF plug, bit of wiring off plug)
Deatchwerks 550cc injectors
Nismo 255lph fuelpump
Engine oilcooler, (Setrab oilcooler core, Mocal sandwich plates)
Upgraded Excedy or similar Nismo clutch with Nismo lightened flywheel

GTRS turbo is capable of producing up to around 375rwhp (UK hp) on dyno if you push it. But should be happy enough producing up to 400hp at engine on a daily basis with high boost setting. Low boost setting should produce less rwhp, as might struggle for traction with 400hp at engine and stock radiator might not be good enough on hot days (summer). Then use high boost setting for overtaking.

Also don't forget brake upgrade with super dot 4 600+ boiling point brake fluid, new low temp street spec brake pads (rotors if car needs them) on all 4 wheels and basic suspension upgrade. Also might want to look at wider rear tyres / rims to help with traction. Nismo Lowtemp thermostat, upgraded radiator shouldn't be needed on a street spec car. But if coolant temps start to rise too high on hot day when pushing car in safe environment, like a racetrack, upgrade them.

[1991HCR32]

What do you guys think the max hp I can run on my engine tomei 2.2 big bore kit with acl and arp everything, steel hg and all supporting mods?

tomei kit came with titanium coated rings btw

[Skym]

Klys on GTRC has already extracted around 355rwhp (at around 16psi) with rebuilt HKS GT2535 turbo with Tomei 2.2 litre RB20DET engine. Full 16psi at around 4000rpm. Stock cams, head, intake, exhaust manifolds, etc.

[M13]

Like I have 340RWHP w/ stock rb20 and GT3071R.


I havent even touched cams yet.

[Skym]

There's another example ^^^^^.

With Poncams, retune, can extract around an extra 24rwhp at same boost level. So probably around 365rwhp for your cars RB20DET with Poncams, without touching boost level. Even more hp if you play with cam timing. Also don't lose much hp down low with Poncams, like you do with more aggressive cams on RB20DET. I noticed after I was told this, the more aggressive the cam, the more it has a cross bow look to powercurve at bottomend.

RB20DET in link below has Poncams, small single turbo, etc. But I think he concentrated on peak hp, so camtiming was adjusted that way (lump in idle when he stops in middle of drift session sort of gives it away, as Poncams usually give engine a smoothish idle) -

http://www.youtube.com/watch?v=LKVqmzp1piQ