DR3AMN

So are you saying i should get the block machined 2mm AND the head machined whatever it needs to acheive the CR you have with say a 2mm headgasket maybe 1.5?? Or just the block? Thank you for the welcome. Indeed its nice i love it to bits. Yes i am building the engine myself. As mentioned above i have the experience with rebuilding engines but thats on N/A so didnt have to worry so much about CR’s, Type of pistons etc cause it was basic rebuild but i want to take it up a notch with this build. My skyline is dead stock. Not even a FMIC and only on 5psi Why not get a haltech? Would the 25 computer be fine or should i get a 20 one and re tune it to run the 25/30?

Alrighty then. So what i take from this is to put 26 pistons in with 30 rods and crank? Did you use the turbo head or N/A head for that CR and what pistons did you get turbo or N/A?

Sorry i thought you were wondering what it was for and wanted to know what went there originally. My mistake. Didnt realise you wanted to know what you can use it for.

I have been reading that thread but its 357 pages long so its taking me a while haha Thats if you are talking about the R33 RB30 conversion thread?? Yeah i searched that i can get CP forged pistons for like $1100 (roughly) or i can get pistons and rods for like $1200 $1300 so might as well get the rod and piston kit together as 1. How would i get that CR? Like what headgasket,pistons, and head should i use?? What CR would i get with the turbo head and standard pistons?

Not sure if they just a straight swap but maybe previous owner put a series 1 plenum on a series 2 motor or maybe its just a whole series one motor together that previous owner may have changed at some time?? If you are talking about the fuel pressure regulator then the vacuum line on it connects to the side of the intake plenum.

That doesnt look to be off a series 2. Mine is a series 2 and it doesnt have that on the plenum.

Yeah im doing the assembly myself but will be sending it all off to a machinist to do the other stuff so i realised il be taking crank out anyway cause i will do those bearings aswell and get it balanced while its out. As i said the only thing that gets me is boost. Iv read that i should try get 8:5:1 or something close to that? Thought the standard RB30 rods were already strong enough?? I will defiantly be upgrading turbo as all the supporting systems down the line but for the moment i guess im just looking for a freshen up cause as i stated its my daily so will be driven alot. I was thinking today that forged pistons would be nice but what combo is best? As is turbo pistons and turbo head or N/A pistons with turbo head or N/A head with turbo pistons etc etc??? I know im making myself sound like i have no knowledge at all hahaha

Oh yes that skipped my mind about using standard pistons with the CR. Yep im defiantly doing some more *studying* before attempting a build. I will be building a forged bottom end down the track but dont want to right now because i still dont know whether to build this car up or just save for a GTR.

Sorry yes i mean patrol. My mistake Yes basic question for a basic build cause im not into a full build at the moment. I want to build my own for experience. I have done a couple commodore motors but thats it the only thing that gets me is boost.

Hey guys. New here. Name is Jason (Go by Jase). Awesome forum i have been floating around reading and searching for a bit now. Very interesting stuff. Anyway i have just bought my first Boosted car its a series 2 R33 Rb25DET Manual. I have basic knowledge on N/A engines but not much when it comes to boosting. To get to the point i have been seeing alot of benefits with going a RB30 bottom end with a 25 head for the extra torque. What i want to do is buy a RB30 bottom end and put the 25 head on there and put it in my skyline because its my daily so the extra torque would be good when not on boost. Anyway i just have a few questions. Im new to the RB/import scene in general so please no hate or flaming me. Is there difference between 30DET block and a N/A 30 block or is it just the internals? What about between cars like any difference between R31 Rb30 or VL Rb30 or Old Pajero RB30 bottom ends?? Should i put my 25DET head on the 30 or a DE? I want to keep the standard bottom end in the 30 and just put ACL race series mains and rod bearings or should i just use standard new bearings and new rings due to i am building the engine myself and just want to gain a little more experience before doing the whole forged everything incase it goes boom i wont be out of pocket to much. Do i need to do anything to the crank when replacing the bearings like get it re surfaced? Or can i just leave it in there? I want to use standard turbo for now at about 11 or 12psi so what would be a good CR for this without affecting off boost drivability? Goals are about 230/250rwkw Can i use my standard 25Det ECU and loom untill i get the Haltech platinum 2000? Im not going to put to many questions out there. While i keep looking any info would be muchly appreciated if anyone can give me any input. I havent found anyone doing something like this its all been worked motors with upgraded turbos,higher psi,lower CR for more boost etc etc. Thanks heaps everyone. My R33 below.