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I Want More Power Out Of My Rb20 What Mods Are Next?

Italiazr1

By Italiazr1,
in Engines & Forced Induction

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Italiazr1 Proficient

Italiazr1

Posted
Posted

Ok i recently blew my little rb20 in my r32 but now im working on a rebuild for it

my car produced 238.8 rwkw @ 19psi before i cracked a cylinder and blew a piston ring

the car already had low compression so i knew it was coming The internals are stock.

i decided to rebuild the 20 instead of dropping in an rb25 because there is too many legal issues

With changing it over..

MY MODS

GT30 turbo 450hp

High mount stainless manifold

660cc denso injectors

3inch exhaust turbo back to hi flow cat

hybrid Front mount intercooler

fuel pump

K+N filter

external waste gate to screamer pipe

greddy electoric boost controler

i am going to strengthen the internals just so i can reliably run 20 - 22 psi

Im not sure what internals i should change and what to use i dont wanna spend over $6000

on the rebuild unless i have to

im getting forged pistons what else do i need?

also wanna try and get a little more down low torque as everybody knows how laggy my setup

is with the rb20 is there any other mods i can do to the engine while its all opened up?

someone said flowing heads? or plenum? i dont even know what these are?

what do you guys recon id like to do mods that you cant see just to be safe from cops

even now its already obvious but easy to change back to stock

Sorry for the long thread but id like help before i go see my mechanic and he tells me that ive gotta spend $10,000 to get what i want if you know what i mean...

Cheers Antz...

seamonsta Contributor

seamonsta

Posted
Posted

Why not get an RB25 or RB26 crank/rods and stroke it baby, more torque and the cops won"t pick it. You also have a full reco engine, not a second hand 100,000 km RB26 time bomb!

Just my 2c worth

Roy Grand Master

Roy

Posted
Posted

There is still hope regarding that bottom end. Still chasing to see if its in the back of the workshop. But realistically...its too much money to build your RB20. For $600 you can get a wrecker RB20 with warranty. I have used a wrecker SR20 (was a great engine) and my current wrecker RB20 that is makign more power then yours and i dare say i drive mine harder then most owners...and mine is in perfect health.

The trick is to get the thing tuned by a person that knows what they are doing. (Thats not to say your tuner doesnt)

Italiazr1 Proficient

Italiazr1

Posted
  • Author
Posted

thats all good but if i drop in any other engine other than the rb20 and i get epa'ed im screwed

Aren't i ????

how far do they look into it if i do get epa'ed?

you cant just put anything in it and hope that you dont get done for it.

my head is done in............................. i just wanna drive my skyline again

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
thats all good but if i drop in any other engine other than the rb20 and i get epa'ed im screwed

Aren't i ????

how far do they look into it if i do get epa'ed?

Basically... if they catch you... your f**ked to put it bluntly :)

There is no way around it if you wanna be "legal-ish"

If you want power upto 260rwkw, its RB25.

If you want more than that, its RB26 if you ask me.

RB25 limit is 260rwkw because after that, your outta options using the stock size turbo, and i was pinned for a GT30 on RB25 :thumbsup:

RB26 is the the only way if you want to avoid hassles/fines etc over 260rwkw. I've been there, hence i just went RB26.

When you do the costings up of a potential EPA, and what its costs to go back to stock... its simply not worth it and its MORE than the cost of an RB26 conversion

Italiazr1 Proficient

Italiazr1

Posted
  • Author
Posted

ok thats what i wanna know. i will port the head then and put cams in.

Maybe NOS next time i blow it up what you recon?

anyway boys thanks for the help ive decided what im doing i will let you's all know when its done.

hopefully have a reliable 250rwkw with not too much hassle from cops

cheers

paulr33 Grand Master

paulr33

Posted
Posted

nos is probably the eaiest way to get more power and response

legality issues of it? yeah cos exteranl gate, screamer, aftermarket ecu, bigger turbo etc are all legal modifications

fEkuaR Experienced

fEkuaR

Posted
Posted
nos is probably the eaiest way to get more power and response

legality issues of it? yeah cos exteranl gate, screamer, aftermarket ecu, bigger turbo etc are all legal modifications

Im not suggesting that these other modifications are legal. But the risks involved with nitrous would far outway the risks involved with an aftermarket ECU.

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