Stock Rb25 Looking For 400+ Whp Proof

[Revspeed]

we have a stock rb25 with a holset hc1 at 18 psi makeing 402whp on a dynojet

we re looking for anyone that has 400+ hp to share info with us

-hopefully we can find alot

we re planing to push ours harder but slowly -each time we up the boost i ll post the video

here s videos of ours

this is on e85 and methanol injection

1000cc and walbro 255lph hp

[R31Nismoid]

find info out about what exactly?

plenty of people have made near on 400rwhp on stock motors. and that's without E85 & meth.

all that info is easily accessible with the search or reading the dyno thread.

honestly taking into account E85 AND meth, your result is poor.

[DVS JEZ]

snap

[(OO)Firty Free(OO)]

18psi at 5200, thats one laggy turbo...400rwhp although its good it aint huge hp. I know of cars making high 400's on E85 with full boost at 3800rpm (running low 20's psi). Either way keep us all informed it will be interesting to see it at mid to high 20 psi what power it produces.

[R31Nismoid]

Yeah, 5200 is no surprise.

The HC1 is an old horse Cummins truck turbo. There were two sizes... I'm assuming its the larger given how bad the response is on E85, which means its capable of around 450-500rwhp going off some US results...

it doesn't appear they were using any special fuels either (85 or meth)

[SimonR32]

SUCK2BU

My RB20 made the same power as that with less lag and only running 42% ethanol

[Revspeed]

find info out about what exactly?

plenty of people have made near on 400rwhp on stock motors. and that's without E85 & meth.

all that info is easily accessible with the search or reading the dyno thread.

honestly taking into account E85 AND meth, your result is poor.

i did some research but found it on dynopacks and dynodynamics

we live in fresno ca which is central california(usa)

there s no one withthin 200 miles from here with a high hp rb motor

most r all heresay

-and a dynopack reads 22+% higher than our dynojet

[Revspeed]

SUCK2BU

My RB20 made the same power as that with less lag and only running 42% ethanol

is it the one on your video that ran 13s@mph?

[Revspeed]

find info out about what exactly?

plenty of people have made near on 400rwhp on stock motors. and that's without E85 & meth.

all that info is easily accessible with the search or reading the dyno thread.

honestly taking into account E85 AND meth, your result is poor.

that s what i said

compare this power to our hondas it s a over price pig...

we have test motors with honda making 100whp per cylinder

-i think it should at least handle 550whp...

[GTScotT]

400rwHP.... That is roughly every second skyline on this forum. It seems that your turbo leaves you sinking in no mans land.

Two threads for you to read:

http://www.skylinesaustralia.com/forums/Pr...html&st=100

http://www.skylinesaustralia.com/forums/40...html&st=360

Those threads are about cars making 500+WHP on E85. Specifically look at the PT5557 results on E85 on a stock SR20, 500+WHP.

The PT thread has all the proof you will need. End.

[(OO)Firty Free(OO)]

that s what i said

compare this power to our hondas it s a over price pig...

we have test motors with honda making 100whp per cylinder

-i think it should at least handle 550whp...

Theres a guy on here username 180or200 thats making 580rwhp on an unopened RB25 on E85. He has been making that for a couple of years so 550rwhp is definately achieveable with the right tune and mods. He's using a Garret 3582 .8 rear with high 20psi boost.

Good luck with it all and keep us informed.

[SimonR32]

is it the one on your video that ran 13s@mph?

No that only had around 300rwhp and ran a 12.8 @ 113mph

[Harey]

400rwHP.... That is roughly every second skyline on this forum. It seems that your turbo leaves you sinking in no mans land.

Two threads for you to read:

http://www.skylinesaustralia.com/forums/Pr...html&st=100

http://www.skylinesaustralia.com/forums/40...html&st=360

Those threads are about cars making 500+WHP on E85. Specifically look at the PT5557 results on E85 on a stock SR20, 500+WHP.

The PT thread has all the proof you will need. End.

The link to the 400rwkw thread is not really applicable, they are all built motors.

[hypergear]

Mine made 428HP on stock motor with 98 fuel and full boost by 4300RPMs:

Except the motor didn't last too long.

[Revspeed]

Mine made 428HP on stock motor with 98 fuel and full boost by 4300RPMs:

Except the motor didn't last too long.

thanks for shareing

what kind of fuelmanagement do u have?

and how did the motor die? spun a rod bearing ,cracked piston?

[hypergear]

Just Nistune ECU with 800cc injectors. It was noisy and rough, had broken ring lands on 3 pistons and chewed out valves due to float. Should really run forgied pistions and stronger valve springs to do any thing like that. and its 431rwHP instead of 428 lol.

[Revspeed]

No that only had around 300rwhp and ran a 12.8 @ 113mph

we have another one with stock turbos that ran a 12.6@118mph no traction on street tires

370whp 91 octane

[SimonR32]

we have another one with stock turbos that ran a 12.6@118mph no traction on street tires

370whp 91 octane

RB26 is a little different to a RB20

[Revspeed]

Just Nistune ECU with 800cc injectors. It was noisy and rough, had broken ring lands on 3 pistons and chewed out valves due to float. Should really run forgied pistions and stronger valve springs to do any thing like that. and its 431rwHP instead of 428 lol.

how high did u rev to float the valve springs?

[old mate]

my mate touched 400rwhp in his s14 rb25 with 044 pump, greedy plenum and 3037. stock motor but obviously injectors etc.