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

[Italiazr1]

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...

[fatz]

6k will get ya a gtr motor installed and will be far more legal than your moded rb20

[seamonsta]

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]

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]

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]

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

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

[cln]

i got through the epa without a hitch.. he acknowledged i had a 25 but as it passed emissions he didnt mind.. seems like i was very lucky :s

[Italiazr1]

im just gonna rebuild the 20 id still like to get a little more lower down tho

[justBOOSTit]

hey just throw abit of nitrous in there.that shall do the trick

[fEkuaR]

If you get Cams and Port the head atleast on the exhaust side it will help kick the boost in faster. This will improve your power curve like you want.

[sinistaGTR]

cams

[Italiazr1]

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

[fEkuaR]

Wouldnt worry about NOS to many legality issues mate. Unless you only intent to use it on the track.

[paulr33]

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]

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.

[Italiazr1]

its ok im not puting nos in my car.

one of my mates did in his VN didnt last too long...