lrb_2000

you can run 15psi on a sr20det safely I heard... which would be around 250whp i'd imagine... and probably 17psi on the rb20det and get around 275-300whp? do a search, i'm too lazy lol.

BigVinnie

iTrader: (2)

UHHHHH you are joking right????? The only modern update that the rb20 and the 3rd production sr20det have are CVET technology. That is nothing new, and it only shifts the power band, by advancing the cam and the TTP, it's called a 5HP gain even if boosted. The internal combustion engine has gone unchanged. Displacement will always kill lower displacement engines on any level.. OH talk about engineering didn't the CA come with cvet. Why is it the KA was made after the CA, are you calling Nissan engineers stupid????????
Why the hell did Nissan make the QR25de with cvet?? It simply put the sr to it's grave.............

BigVinnie

iTrader: (2)

Those are all myths. Injection and cams have to be upgraded before achieving anything close to running it "safe". Then you would also have to concider the engine management which would also need a good upgrade......

Slidin240

O/T

Nice Onevia Vinnie

GearShifter240

Basicly to pick which engine is better for the swap.. it actually dpeneds on what you plan on doing with the car... if its going to be a daily drive car... then its going to be the SR but if its going to be a project car then its going to be the RB... I personally would go for the SR...
~Did i get it right?... SR for daily drive and RB for project... always get those mixed up..

Waynehead05

if you keep the motor near stock it doesn't matter. you have to order parts for both engines anyway. if you are going to boost on stock internals... it doesn't matter. if you are going to mod it to hell and back... ?

GearShifter240

Waynehead05... So if i am planning on moding it... the SR should be the one that i should go with right?... or would the RB be better if im moding it?...planning on daily driving btw

KerosineK

If you are going to mod it either way, you are better off with the SR because of the abundance of parts, the parts will also probably be cheaper.

GearShifter240

Oh ok... Thanks Kero!... SR!!!!... Umm sorry if i did that off someones topic...

precisionelite

What are the technical differences between the SR20DET and the RB20DET? I've heard the RB20DET has stronger internals, and an Iron Oil pan, but not much aside from that.

Personally when I get my 240 i'm leaning toward the RB20. I think if you race it hard the RB20DET will hold up longer because of it's much shorter stroke.
-Greg

CowboyTurbo

RB has stronger internals because it's built to push more power (2 more cylinders, bigger turbo~ obviously) It may have a shorter stroke, but then again it also has more moving parts. Not to mention there's generally an inverse proportion between hp and reliability...

precisionelite

Let's say you blow a headgasket or break a valve or need a new water pump for the RB20DET...where would you find these? I know it will be harder than the SR but I hope not impossibly so. This is the main factor limiting my decision.

Also with regard to the stroke: I do realize that the number of moving parts is a factor in the equation. However, so far as the RB series is concerned less stroke is going to equal slower piston speeds so less stress on the entire motor would result.
I'm not sure if there would be less stress at a certain rpm compared to the SR though because there are more moving parts. I can tell you this the SR has the exact same bore and stroke as a K20a. Being a Honda Guy first, with that bore & stroke you should be able to rev it quite high. You can rev K20a's to 8500 RPM max until you need stronger rods. However there are many factors involved.

CowboyTurbo

Exactly. You gotta ask the right questions to get the right answers.

precisionelite

Are there any sites that sell RB20DET Parts? (I.E. water pumps, pistons, oil pumps, bearings,etc)

CowboyTurbo

www.rbmotoring.com for some parts, but to answer your question, yes. There are numerous sites where you can find RB parts. it's just going to have to take some old-fashioned effort to find...