Rb25 Setup Help For Over 500hp

[GreeceS13]

Hi guys,

I bought a rb25det engine with box for my S13!!

I am looking for over 500hp for drag strip and everyday car!

I will for the begining that I don't have much money to spend and I also want a safe motor!

Where is the limit of the stock pistons? How much horses can handle with good rich mapping (high 11 afrs?) ?

And where is the limit of the stock rods? How many rpm can handle and how can I avoid any damage of them with my driving?

Can I strengh the rod's limits with changing the bolts with arp? I read somewhere this but please confirm this to me

I will work with stock cams and head!

The parts I will order are:

Greddy style intake

Q45 throttle body

XS Power top mount manifold (I will increase it strengh with a "help bar" and some extra welds)

JUN Crank Collar

N1 oil pump

Tomei oil gallery ofrice (and I will block one oil feed and I will increase the flow of the oil return)

52mm koyo style cooler

I have fmic from my previous motor with core 600x300x76mm and if you think that it isn't enough I can put a same with 100mm core!

I am from Greece and the climate here is quite hot.

My exhaust is 3"! Enough?

I have walbro fuel pump and as I read I need a fuel pressure regulator because stock of rb can't control the big fuel pressure of the walbro!

555cc injectors and 300zx maf and remapping the stock ecu.

And I will try to buy a twin plate clutch kit instead to buy a single ACT even then I read that act can handle 500hp!

If I will buy a twin plate maybe I will buy

Also I bought a gasket kit to replace everything! Also head gasket I will leave the stock.. what limits it have? I read something for 1.2bar boost!

I don't know yet what turbo to use....!

Garret choices:

GT3076 I think that with this I couldn't go more than 520hp..

GT3582 Garret says 400-600hp according the housing...!

Greedy TD06 25!! At 1.15bar with absolutely stock motor got 500bhp!!

Anyone knows how much more can go with more boost?

Turbonetics GT-K 550!! I love the look of this turbo! 500-600hp rated!

Also any help with the garret turbos what horsepower you can think that can give with the same boost to compare and with what compressor housing? (1.1-1.2 bar)

Garret's are also cheaper choice!

Also please tell me your comments for my choices, tell me what else I will need and help as much as you can

Edited December 15, 2007 by GreeceS13

[Devils_Advocate21]

500hp = more than 15 k to spend

[GreeceS13]

500hp = more than 15 k to spend

Man you don't help me...! I don't ask abou the costs... I ask many other questions....

Also I see that you always talk for WHP in this forum! I talk for CRANK HP!

I would be happy to help me!!!

[subzeroR33]

I dont think 500hp will last long on stock internals, i hope thats a metal head gasket.

At least get forged rods and pistons, and balance the motor.

I would go with a GT35R or a GT3582. With a .82 housing, ur 3 inch will be fine.

You should get the power with standard cams, but i would definately get some minor head work done.

Edited December 15, 2007 by subzeroR33

[tridentt150v]

500hp at the crank is approx. 270-320rwkw, depending on drive train and friction etc, its way too variable to put a hard and fast figure on the conversion from chp to whp.

But a std motor will handle up to 300rwkw, but when you get to that level its a roll of the dice as to how long your motor will last.

But I don't care what you say, DA is correct, it'll cost you heaps..............its reality, you can't avoid it.

[GreeceS13]

Ok maybe it will cost and more... but I don't ask you tell me how much will cost!

I ask many questions... can anyone reply me please?

Please I need replies in all of my question... they are very important for me..!

Also I need ecu as my tunner said me that it cannot remapping the stock..!

Emanage choice is good? Can I have launch control for drag strip? Can it increase rev limiter (because a friend told me that it cannot)? Also I don't need 300zx maf right? Can I run with only the map sensor or it needs the stock maf?

Edited December 15, 2007 by GreeceS13

[GeeTR]

No one will answer your jabbering, as its all been dealt with before :\

Search

[J3TR33]

just buy a GTR with the amount of money u have to spend to get the power u need.

"I will for the begining that I don't have much money to spend and I also want a safe motor!"

If you dont have enuff money to spend why u telling people no to tell you about prices. They are being realistic and have obviously gone down this path before. If you dont have 10-15k to spend on the car then why bother even thinking of doing it.

To me it all sounds like a lil kid with a big dream, and then he wakes up with his pants wet.

[SirRacer]

Im not very good with crank horsepower as it doesnt mean shit to me, but personally i wouldnt bother opening up the engine so your going to save a bit of costs there. If it does go bang rebuild it with forged bits. Personally i dont think you will have any issues with it.

They run 9.1 comp ratio which is nice and high, so in my opinion run a gt3076 (.82) with upgraded injectors, pump etc and a good computer without an afm

A friend here is running 270kws at 14psi on a stock as a rock rb25 so its very doable.

Start off with running that turbo on the standard exhaust housing and i think that should get near your power goals without being that expensive.

Edited December 16, 2007 by SirRacer