rb20det swap in 92 240sx?

[Pantaro]

what is the story on the whole rb crank collar issue anyway?

[s13drifter88]

the rb20s and series 1 rb25s have short snout cranks that allow for harmonic vibration during sustained high rpm operation causing engine failure. the collar eliminates the vibration problem. series 2 engines had a long snout crank and didnt suffer from this problem

[Carl H]

sorry but you've got it wrong.
the 'harmonic vibration bit' is not an issue...inline six engines are inherently ballanced both on 1st and 2nd harmonics.
the short drive doesnt engage the oil pump enough and with enough revs or power can strip the drive and shatter the gear.
ALL RB engines except r33 and up rb26 sufferer from short snout.

[s13drifter88]

so ur saying that a cracked crank between 3 and 4 in an rb20 would not be the result of harmonic vibration resonating thru cast steel. yes ive heard of the oil pump drive problem but never once seen it, and ive seen way to many rb20s lol. yes the collar kit helps the oil pump drive, i ndont doubt that at all but also by isolating the end of the crank a little better in the pump, i believe, can reduce that vibration. like touching a bell when u ring it so to speak. and if u read on the wik, itll say the same thing about vibration

[Pantaro]

so whats usually the best way to deal with these issue to avoid engine failure?

[s13drifter88]

ca18det! lol j/k. a crank collar solves both of them, or lemme rephrase that. eliminates 1 and reduces the other

[Pantaro]

ca18det might be,lol cause im not ready to tear down an engine until im gonna build it

[s13drifter88]

its not a solution, its just a very simple, easy alternative. i swapped an sr with a guy once that bought it like my ca for sale, new clutch, already wired ect. we started swapping at 11 that morning a drove it out to meet up with some other friends that night. when its usdm ready, its about the same as replacing a ka with a ka other than mouting an intercooler and things like that. its just really really easy

[s13drifter88]

and i love the ca, its such a great little motor and i stress the little part lol. a t28 with rx7 440s or rx7 turbo2 550's, rom tune and n62 maf is an easy reliable 300+ package. i mean really, 750 for turbo, 320 for deatschwerks 440's, 400 for rom tune and 100 for the maf. 1500 for motor set, and 1600ish in parts and theres 300+ reliable for under $3500. so if u even figure in the car, lets just say all u had was a shell that cost 1000... a 4500 car with 300+whp and 270ish wtq. Hello, my name is angle, u can find me on the track.

[Pantaro]

lol well played.my shell was 500 actually hahahha.but yea i could buy the rb25 if i wanted to wait a lil longer but right now i need something reliable and i have money to throw into this project but im not trying to do any internal work outside of gaskets and basic maintance parts.cause i'll be damned if i crack open a motor just for a crank collar install.but as far as the ca18det goesi rode in one that was mostly stock wit a front mount and full interior and i was in love.honestly i cant think of anything bad to say about it

[s13drifter88]

its not the biggest badazz out there and im not gonna try to build it up to be but i love the little guy coz of the simplicity of it and bang for buck it d*mn near impossible to beat. when u can buy a car, swap it and build it for under 5k with 300+whp, that says something.
its not the biggest power monster but itll suit the needs and desires of any street tuner and can bring a smile to the face of any big supra or skyline owner. Performance is not all about power, but how well u can deliver it.

[Cjmartz2k]

the rb20s and series 1 rb25s have short snout cranks that allow for harmonic vibration during sustained high rpm operation causing engine failure. the collar eliminates the vibration problem. series 2 engines had a long snout crank and didnt suffer from this problem

You read to much BS on the internet. The like Carl H said, the only RB's with the longer crank snouts were the later RB26's. Even Neo RB25's have the regular short oil pump drive. It's not really a big issue anyways.

O, and RB20's aren't worth swapping in to anything

[Pantaro]

yea i definitly agree with you drifter88,seen too many wannabes who dump stupid money into motors and have s*** for suspension and tires.also i called r&l today for a shipping quote regarding the ca18det your selling way too rich for my blood.i'd love to buy an rb25 but ever since i started lookig into the whole crank issue im really put off by it til im ready to do a full engine build.

[danielmcn]

the crank is not a big deal until you build it or your running at high rpms for a long time. If you drift you should fix it. there is plenty of guys running with out it fixxed no problem, most of the time people will put one on while they have the motor torn down just to be safe.

[Pantaro]

my plan is to drift,but its also gonna be a daily driver. i dont plan on doing too many crazy mods on the motor right now as far as power goes.i definitly dont wanna be driving constantly wondering if its suddenly gonna go to s*** one day either.

[s13drifter88]

id love to see u say that to some of the people around here where im from. then id really love to see u line up against them of coarse thatll never happen coz u live 1/2 way around the world but whatever. theres sooooooo many people making great power with rb20 that its not even funny tho. why dont u go die or something

[s13drifter88]

oh and ur also saying that series 2 rb25 arent the long snout crank. u need to meet a tape measure or a ruler and call it friend

[Pantaro]

did u just tell him to die,lol

found a guy on facebook selling s2 rb25 for 1300 only the block and head tho damnnnnnnnnnnn!

[Pantaro]

s*** i need to just buy a damn rb20 since it has so many haters and get a huge vinyl for my 180 that says UNDERDOG! ralmao

[Carl H]

i really dont like your attitude here, i was correcting misinformation that you had posted and now you insist on trying to call me out.
i really dont know who you are but i dont like you at all...last i checked i've been poking at rb engines for almost 7 creeping up on 8 years, wired numerous harnesses, tuned many a car, and trouble shot untold number of swaps.

it doesnt matter what year/series rb25 you have its a short snout crank...nissan kept using their stock of cranshafts well into the end of the skyline life cycle and even the newest neo engines have the short drive.
as for the rb20 crank snapping in two, i simply have no idea how you do that; i've revved my stock rb20 crank hard to 8500 for the past 6 years now and have given it absolute hell on a daily basis and never had my crank crack...nor seen any swapped cars ive had a hand in do so.
either the engine was seized up due to lack of oil, bad bearings, or poorly assembled bottom end but no way is that possible on a good stock botom end.

be helpful or leave, being a tool is no way to leave your mark.

[danielmcn]

yeah I tend to believe carl on stuff when it comes to rb.


yeah dude get the rb20det you wont be mad. I am going to post a video of mine monday, I have one but its an onld on. http://www.youtube.com/watch?v=vh8LQnTMfu8 Its now black and the switch only runs the fans, the gauges come on with the keys, and I added a greddy tt

[s13drifter88]

you may have swapped and tuned and so on so forth but im no newb to the rb. ive had my fun with them for the last 5 years myself. ive been into the lower deck of several and have seen cracked cranks, 2 to be exact and both were in rb20's. so what ur saying is that it doesnt happen but what ive read is there is a problem with harmonic vibrations and ive personally seen it. cranks crack due to bad vibrations, btw all of which had the stock balancer/crank pully and was not damaged so that rules out a modified or damaged balancer. i dont doubt u kno what what doing with one but dont assume someone else doesnt just coz they have a ca18 or something. i only chose the ca coz i wanted to build the smaller. people in my town had jokes to nmake about it so i decided id buy one and swap it and now there are no more ca jokes. just 4 more swaps running around my town since mine hit the streets

[s13drifter88]

and btw, i was talking sh*t to u. i was talking to Cjmartz2k. saying the rb20 isnt worth swapping into anything is BULLSH*T!!! i hate people with that mindset. if i feel like it ill swap an l28et into my 240 and when all is said and done it'll perform to whatever standard i feel like making it. my best freind thomas had a vg30et swap into his na 86 300zx turbo and with all the stock turbo parts on a the na motor with a pair of BIGG schneider cams with a little port work and an old profec 1 he raped tail. tookn an na single cam vg and used the stock turbo parts, swapped it into his z, and made GREAT! power so i hate hearing that no motor is worth it

[Cjmartz2k]

LOL, I'm trying to figure out if this subject is going to be enough fun to be worth posting. Before I get to into how awesome stock turbo'd VG's and RB20's are, and how they should race a 600hp RB25's, I'll focus on facts.

Exactly how many RB20/25's have you pulled apart and how many of them had extended crank collars? I'm just wondering where I should take my tape measure or ruler friend.

[Cjmartz2k]

and btw, i was talking sh*t to u. i was talking to Cjmartz2k. saying the rb20 isnt worth swapping into anything is BULLSH*T!!! i hate people with that mindset. if i feel like it ill swap an l28et into my 240 and when all is said and done it'll perform to whatever standard i feel like making it. my best freind thomas had a vg30et swap into his na 86 300zx turbo and with all the stock turbo parts on a the na motor with a pair of BIGG schneider cams with a little port work and an old profec 1 he raped tail. tookn an na single cam vg and used the stock turbo parts, swapped it into his z, and made GREAT! power so i hate hearing that no motor is worth it

Oh, and BTW, you meant to say "I wasn't talking sh*t to u." Also, we start sentences with capital letters in the english language as well as using an upper case "I" when referring to ones self. "tookn"? I'm guessing maybe you meant "Taking?" And I didn't say no motor is worth it, I said an RB20 isn't worth it. They aren't worth messing with when they come stock in the R32 GTSt's they come in (unless you are talking about drifting) and they aren't worth putting in to another car, when an RB25 is not much more to put in. What do you think can in the car you see in my sig? I've done both and can speak from experience. What experience are you using to compare the cost vs. benefit ratio of RB20's vs. RB25's?

[danielmcn]

Oh, and BTW, you meant to say "I wasn't talking sh*t to u." Also, we start sentences with capital letters in the english language as well as using an upper case "I" when referring to ones self. "tookn"? I'm guessing maybe you meant "Taking?" And I didn't say no motor is worth it, I said an RB20 isn't worth it. They aren't worth messing with when they come stock in the R32 GTSt's they come in (unless you are talking about drifting) and they aren't worth putting in to another car, when an RB25 is not much more to put in. What do you think can in the car you see in my sig? I've done both and can speak from experience. What experience are you using to compare the cost vs. benefit ratio of RB20's vs. RB25's?

I got a question for you. Why is the rb20det worthless but the sr20det is soooooo damn good? both 2 liters, both stock turbo, both make just over 200hp from the factory. I dont know looks like it comes down to how they are made to me. Lets do a small side by side:
rb sr
I6 1998 cc, bore: 78.0 mm, stroke: 69.7 mm I 4 1998 86.0 x 86.0mm
This is the main diff between the two 2liters. What are you talking about you ask. The rb has a smaller bore and stroke, but it has two more pistons. The shorter stoke WILL be able to make more lbs on equealy built motors. On top of that, lets say both motors make 300hp. The rb is not working as hard as the sr to make the power. You need 75 hp perpiston to get 300 out of the sr. With the rb, you only need 50 hp. Still dont get it. A 300 hp rb20 will not work has hard or be put throu as much strain as a 300hp sr, thus meaning the rb will last longer(not to mention the rb is built stronger anyway). Granted 300hp on both is not that big a deal, but what if you change that 300hp to say 600hp.

I dont get it, who said anything about the 25? We know that the 25 is better. ITS A BIGGER MOTOR DUMBASS. I wanted one, but did not have the money. When I was shopping around(two months ago mind you) the rb25 was going to run me about 1500 MORE THEN THE RB20, and that was using an ebay motor set. I did not have that much extra just sitting around.

[Cjmartz2k]

LOL, I'm like 14 Orion down now (those are beers BTW), so I'll just respond to one part of that since I'm in no position to reply in a coherent manner with facts. Who said anything about a RB25? You did when you talked about me running some of your boyfriend's cars with their RB20's in them. That car in my sig ain't something I grabbed off the internet buddy boy

[Cjmartz2k]

O yeah, and when are you going to answer my question about how many RB20/25's you've cracked into that had extended crank collars tape measure pall? That's right, just keep talking about stuff you've read on the internet and stuff your buddies have told you after they got done racing their sweet stock turbo'd formerly n/a VG30de's.

Quit spreading BS tech on this board. Your opinion about crappy RB20's is welcome. Your bad tech "facts" are not.

[Pantaro]

so what exactly in your opinion makes the rb20 so crappy?

[s13drifter88]

i got something for ur 600 rb25. i mean if were talking build for build i got a big block Motion Performance phase 3 496ci chevrolet sitting in a 74 nova. i mean ur comparing guys that drift on the weekends and swap for an rb20 coz its cheap, easy, and effective to big built cars. cleary ur intention of a swap an mine are totally different. but if we wanna talk about built and building motors no motor is worth it if its under 400 cubic inches. i mean thats if we go by ur logic tho. maybe there is a world out there where people are just regular people that enjoy the weekend motorsports and source up engine swaps that are affordable for those regular people budgets so that those regular people can have a good time. id rather see a 19 year old kid who worked his azz off for an rb20 swap than id rather see ur skyline. hell... id rather back up into ur skyline. oh and not much cost difference. its about a grand more for a good motor set, the mckinney mount kit is 200 more and the stock s13 driveshaft wont work so u gotta buy a 1 peice.