Rb25/30 Build. - Help and Support.  

yeah true mate i hate the things, re the wanker that abused me fuck off dickhead i own a vy and i work on many of them just because they say on paper what they will doesnt necessarily mean thats it the be all and end all and no the ls2 and 3 burn the oil black as dirt within 5000kms quite regulary. and to compare a AMERICAN CHEV to an cast iron rb is fucken just as stupid! rb is smaller engine less cylinders and can make the same amount of power and still beat the AMERICAN piece of crap down the quarter, around the track and up a fucken hill whilst being far more reliable, and while we are on this note the thread is about 25/30 so fuck you and fuck ya holden commodore shit of fuckhead i never asked for your insults.

SO in regards to cost and stuff gtr injectors will run it but not high on power. spend around 6k on everything biggest thing though is the machining i've been doing alot of research into this and paint the inside of the bolk, knife edge it and take out the burrs and get a good oil pump

yeah true mate i hate the things, re the wanker that abused me fuck off dickhead i own a vy and i work on many of them just because they say on paper what they will doesnt necessarily mean thats it the be all and end all and no the ls2 and 3 burn the oil black as dirt within 5000kms quite regulary. and to compare a AMERICAN CHEV to an cast iron rb is fucken just as stupid! rb is smaller engine less cylinders and can make the same amount of power and still beat the AMERICAN piece of crap down the quarter, around the track and up a fucken hill whilst being far more reliable, and while we are on this note the thread is about 25/30 so fuck you and fuck ya holden commodore shit of fuckhead i never asked for your insults.

SO in regards to cost and stuff gtr injectors will run it but not high on power. spend around 6k on everything biggest thing though is the machining i've been doing alot of research into this and paint the inside of the bolk, knife edge it and take out the burrs and get a good oil pump

ok thanks mate, i definately wouldnt take the cheap option of making a slapper, anyone know what a rough figure would be to build a 25/30?
i have a motor out of my old vl calais factory turbo-the donor block which only has 46000ks on it.
i also have a haltech e6x and a garret gt3540, set of gtr injectors- are these up 2 the job?

Tyring to get thread back on topic

The figure depends on your budget mate. What I spent on my entire engine someone was spending 1.5 times that on their head alone (was at the engineers picking mine up when I spyed the masterpiece lol) and I spent ~ $20K on my engine not including bolt-ons.

You won't be able to use a RB30ET bottom end with a twincam head as the RB30ET has combustion chambers of about 52cc where the 25head has about 78cc so your compression will be too low ~6.5:1. GTR injectors are too small and wont fit a RB25DET head anyway, the GT35R will be alright but you would want the 1.06A/R rear housing if your going to be driving it hard because anything smaller will cause too much restriction and a bottleneck resulting in very high turbine temps and ultimately cooking the bearing cartridge.

T4 flange turbo with correct sized rear housing it best option.

work on them mate and they burn oil like shit, and yes as i said my missus has 04 hsv and unless they are fully build with forgies and oil cooler etc they are shit! ford ftw. and until holden even have the remote racing heritage that ford due they can fuck off on quality.

Disregarding the fact you know absolutely nothing about LS engines, the second part of your quote amuses me the most.

Correct me if I am wrong, isn't the way around the silly low c/r with the RB30ET to use the series 2 RB30E bottom end?

AFAIK cant use ET spec pistons in any of the blocks as c/r will be too low. Also you can use a series 1 RB30E block, just needs oil and water galleries drilled for the turbo as series 2 already has the galleries.

No i'm not....




























I'm a smug little asshole.

Disregarding the fact you know absolutely nothing about LS engines, the second part of your quote amuses me the most.

ORLY?

He already mentioned that!

Not the question I was asking.

yeah ok i know nothing about them yet i work on them in a work shop with a qualification. fuck off get back to the subject\

You heard it her first folks. RB's are better then LS's. I guess we've all be wrong this whole time, and people who put them in their cars are stupid. It must be true, sideways master said so. That reminds me. How much torque and hp can you get out of a built RB20/25 with a stock bottom end? How much do those motors weigh again?

yeah ok i know nothing about them yet i work on them in a work shop with a qualification. fuck off get back to the subject\

Correct me if I am wrong, isn't the way around the silly low c/r with the RB30ET to use the series 2 RB30E bottom end?

ford ftw. and until holden even have the remote racing heritage that ford due they can fuck off on quality.

Both series 1&2 RB30E's have the same CR, the only difference is the water and oil fittings already on the block with the series 2 RB30E's which are esentially the same block as RB30ET's but have different internals. So either N/A RB30 engine is suitable for RB25/30 on stock internals.

Otherwise I'm save as gutless, confuse

Well if you want good Torque and Power made down low and want to stick to a budget, i would go with a 25/30(as a 26 head is considerably more expensive). Put Aside another 4k on top. prepare to spend around 5.5k on getting the bottom end properly prepped and built with forged internals(this figure is a quote for bottom end ready to bolt a head straight on from last year). Get the head checked,decked,prepped and VCT Welded up and rerouted(would recommend retaining VCT). Get a good quality Turbo,Exhaust Manifold,Plenum,Injector Set,Fuel pump,ECU and get a decent tune. All in All get ready to spend more than this in the end(considering that there may be a cheaper price for building the bottom end) but none the less when you build a Hybrid 30 you should always go 1 of 2 ways:"Completely dodgy" or "Do it right, do it once!". Picking option 3 where you cheap out in certain areas will just leave you with empty pockets and a fucked engine in most cases.


For a completely dodgy build buy a standard running RB30 and a Full non-running RB25DET long motor. swap all the externals parts over like water pump,oil pump etc. move the tensioner for the timing belt(of which you need a new one with more teeth because of the twincam head),grind off the top bits on the side of the block that would obstruct a twincam head and weld up VCT in the head(may have missed a few little mods to do in this process but you get the jist). whack on the head and hey presto you have a 25/30 with conrods that are rated to an average of 300RWKW.
so then you can have some fun until it blows up or you crash (would like to try this some day just to see what i could get out of the engine before it blew up)
These are my opinions and my current knowledge, if i am wrong about something i am more than happy to retract said information.
hope this helps.

Post proof or STFU. IIRC LS1 weighs less than an RB25DET.

I Love RB Engines but i am not closed minded and thick. Don't go rubbishing engines just because you can(My personal quibble with LS engines is i much rather a more oldschool sound to a V8 of which in my opinion an LS is lacking as opposed to say even the note of a 304 but i don't go saying they are shit terrible engines because its quite apparent they are not).

There is no Replacement for Displacement.

If you have any "qualifications" it's running your mouth off at the wrong person, not mechanical.

So help me god if you are employed in the mechanical trades industry with your "knowledge".

Goddamned lowbreeds............

My biggest issue with the LS engines that come into the shop are fucked out valves and springs and retainers, burnt oil, fucked rear main seals fucked cams and cam bearing fucked bottom end bearings and mains primarily all from the engine burning the oil black so quick. AND when the missus bought the HSV NEW
it went back to the dealership Several times in the first week, blowen valley gasket warped heads leaking aircon broken valves, mind you the car was NEW UNMODIFIED. So my comment is nothing to do with being thick my personal experiences have showen me that they are shit and several HSV enthusiasts that i know have hated the LS series of engines aswell also having problems with them and the higher maintenance over the 304 and 308, personally i agree with you with all comments in regards to engineering ie displacement and weight but the engines just cant do what an rb can without some serious issues in my personal opinion. so in high sight i really dont appreciate people calling me thick just because they have a different view i merely said that the engines where shit based on my experience i would like this topic to get back on subject as it is about nissan not folden.

Gutless, how many KM's before your 25 shit itself? I know my 20 died at 140thou..

mind the low breeds comment bogan

i also have a 26/30 450hp on standard bottomend, good luck with the build

other prob ive notice is that the intercooler is same side feed and delivery, p.s. I'm a bit of a mechanic i usually build rb25's, 26's and 30det's, how ever i have never done a 20 and dont know much about them and would porting the head help? Aswell as a tuned lenght manifold. The ecu is a hks rb20 item too, what would a good but safe power output level be for the gts4 manual box??

i said if us fucking re read i'm a bit of a mechanic, i never said i am a mechanic, so call me what yous want im not the ignorant @#$! that cant read. Another thing just because an engine is of the same family never judge its character to be the same, like how the rb25 vs the 20 is less reliable etc hence the reason i asked whats the point in assuming and possibly fucking shit up and yes an rb30det otherwise knowen as a 26/30 or 25/30. So how do i go about making an rb24

So. In two threads. You've contradicted yourself pretty well. If you build 25's, 26's, and 30's. Why do you feel the need to come on to here to ask how to build one. Surely you should already know how to do this.

Second. How is it, you've gone from a "but of a mechanic, not a real mechanic" to a qualified LS1 mechanic.

Third. If you're poor enough that your mum and GF have to buy you an RB30 block. How does your GF own a new HSV?

You're a liar mate, and I'm calling you out. You're a nobody. You're not a mechanic, never mind one that works on LS's (I didn't realise that there was a specific job that JUST works on LS's) You own an RB20 powered vehicle. You think RB's are better then LS1's. Your "GF" doesn't own a HSV.

BAM.

Rancher maybe you should up load the rest of the thread dickhead and show people what was really said, second the rb30 was a birthday present as i said before you dumb @#$! and third @#$! i got photos of the car i can upload for proof so fuck off dick cause your trouble but your wrong what if i uploaded my old thread and showed the people what kinda dumb arse you are for showing only half the info cause you a stupid @#$! now fuck off and go back to kindergarden wanker.

and second if your a jdm hater why the fuck are you in my thread fuck off again im over you and your shit dont like me piss off dont talk to me. fuck it i'll just get a moderator.

I dont need to bring up that thread. I've summed up you intelligence in my post up there. The only person swearing, and generally acting like an idiot in the other thread was you. Sure, you can "load up the old thread" But I never posted in there. Other people did, and they ALSO showed how little you know in regards to mechanics.

The only person acting like a liar here is you. You're still wrong. You still have no idea, and you haven't added anything to what I said, except a few swear words, and some strong threats I'm sure you cant follow up on.



Oh. You own this thread do you? Bloke, you have no idea. I've built more motors then you, and I certainly dont need to ask how something is done. LOL at you biting at my JDM hater, that is aimed at people like you buddy. Not the cars. Its also had another person bite. Thanks.

PM HSV. He'd be happy to help.

Lol at this dumb OP. Pm HSV he loves pms on a sat morning also my 20 died at 108tho if i could afford it (give me a payrise @#$!) i would have a LS series motor in my skyline.