Russ_T

That's interesting. One of these puppies then http://www.atiperformanceproducts.com/prod...s/damnissan.htm

BADR33: Thank you, I'll be sure to post my progress here (one day, buying a Z32 a the moment and finishing my other 240) Sydney Kid: I love you, that is exactly what I need Sounds very much like what I imagined I'd need as well. RB30 block and crank 3.1 litres 13.5 to 1 compression ratio Is that 3.1 overbored? How did you get that compression ratio? I imagined the RB26 head had one of the bigger chambers (low compression), are you thinking of welding up and reshaping the head chamber, or is that a tall piston (extra weight?) or longer rods (better idea, good stroke/rod ratio for high revs), or a domed piston?? What crank? Thanks all.

I'm going for aftermarket throttle bodies, injectors, entirely new valvetrain, ecu etc. I don't care if I have to replace everything, so long as the engine is a Nissan straight 6. I know the Mines skyline was good to 8500rpm plus, and I'll need the revs to make the power NA. I really need lightweight and strong rods and crank, with everything perfectly balanced and forged pistons.

Thank you! I just skimmed the pdf and am now printing it for my perusal, brilliant http://www.automotiveforums.com/vbulletin/...d.php?p=4141983 That's another forum I've been chatting about this on. I wonder how you figure out your rev limit for an engine, or do use some informed guess work and hope for the best? I couldn't afford a destruction orientated development plan, and guess for the sake of not having to rebuild the engine regularly should err on the side of caution. If I could see 9500 rpm I'd be a happy chappy, apparently that's doable. 10k sounds better though, but probably both unrealistic, unless I can get some motorbike engine components into the equation. Anyway will read the pdf, much appreciated.

Is the variable valve timing something I can use? BTW this is the one and only engine I intend to build for a 240z, so if it takes years I don't mind. With that in mind I'm intending to really go town, and I'm an electronics fan, so was thinking MoTec make the best ECUs? Probably get one of those, if I could get one with a switchable map that'd be great, that way I could map it for 99RON fuel and for 109RON fuel, I guess? Are the RB cranks interchangeable? Does anyone know for a book that lists the component specs please? I have an L series tuning book that tells me all the crank dimensions, strokes, different piston dimensions and chamber ccs so I can figure out the right combination of parts. I need something for the RB. The only way to make high power with a NA engine is high RPM with high compression, get the air in so you can make it.

Hi all, The thing with the performance RB parts is they are very strong to cope with big boost. This isn't something I'll be running so I could probably do with something not quite as strong, but lighter for the high revs. More like Honda parts if you know what I mean. I don't think I could run 98RON on 12:1, I could be wrong. I am looking at running bio-ethanol though, 109RON The RB block looking old is good, it looks more like my L6 and will suit the car better The TwinCam pdf doesn't work for me, Yahoo says the file is missing Thanks

Yep, and that the ignition is equal, and the mixture. So much to it. Anyway back on topic ladies, Thor racing in my country do RB30 engines, ok they are turbod and silly money, but they have a container full of them http://www.thor-racing.co.uk/RB30_2WD_Stag...RB30_2WD_S2.asp I think the RB30 despite being old might be the way to go, bore it over by 1mm (would have thought that was possible, depending on pistons) to 87mm so that's 3067cc or 88mm would be 3138cc. Would an RB26 crank fit an RB30? Can anyone recommend any books where I can get this info please? The blocks look really old like my L6, so I cannot see they are much better, unless they allow me access to trick cranks and I suppose I can then use the RB25DE head with twin cams, VVT if I can get it. Hmm

I don't want to make the power from N20, I might as well keep my L6 otherwise. Links to high performance NA RB26s would be appreciated please Thanks for debate so far.

Don't start on British car engineering/manufacture. Honda have chosen my country to build in, no one ever said a Honda was unreliable. Also F1 engineering is basically here, now that's some BHP/Ltr from an NA engine. McLaren, Cosworth etc etc. Anyway at least the TVR has soul and sounds nice, the M3 is a bit of a no brainer, yeh very accomplished and great if you buy a car with your head, not your heart. Anyway back on topic.

There you go, it's a 4ltr RB26 has a destinct disadvantage. Although I was going to go the route of ITBs, MFI and any trick bits I can get, I am still 1.4ltrs down. That's what I wanted to hear Where is this wealth of information though on NA tuning the RB please? I have various books on general four stroke performance tuning, but I'd really like to find a website (be it a shop or whatever) where I can start looking into parts, different pistons to get the compression ratio I want etc etc. I'm finding it difficult to plan it at the moment.

Nice one guys I can make up my own fuel rails and throttle body set ups Would probably go for something after market with a twin injector set up (one in tb, one in air box a la F1 and other performance engines). I am trying to find a book or website with the different bores/strokes of RB blocks and the cylinder head chamber sizes etc etc so I can start working out a compression ratios and such. Any ideas please? Amazon has nothing here. I really need to be able to run it on normal petrol though, here thats about 95RON to 97RON, 13:1 might be nice but I would like something I can just fill up without thicking "where's my additives?" and such. I know that will limit the HP. Engine HAS to be Nissan, otherwise I might as well forget this project and fit a SBC like every else does. I can get an RB26 in this country, which will save me some agro/money. Not being a Skyline man (I wish, one day) can someone recommend any good web shops that stock lots of engine parts and all the major manufacturers please? I would like to start eyeing up parts and prices. It might even be cheaper to buy the OSGiken kit lol Thanks again all.

Mmm, broad minded persons. NOW WE'RE DEFINATELY TALKING! I've listened to some audio clips you guys have put up of the NA RB, and I'd probably sleep with you and I'm of the heterosexual persuasion, who knows what effect it may have on a woman. I'll have to fit big bumpers to get them out of the way when they throw themselves in front of the car.

I see your point. I just expected to find a lot more on them, you know usually you can search for something even really obscure on the net and find a torrent of info on it and loads of fanatics. I was hoping the NA RB scene was going to be bigger, but alas we'll have to make it bigger. NOW YOU'RE TALKING! That sounds exactly what I'm after. If anyone has any info on this, or what magazine it might have been in etc then I'd appreciate it. Not so much because I want to rip their ideas of, just as a proof of concept of what can be done. I've been thinking about the power of the RB and I think I just want it bad enough that even if it doesn't make big power I don't care, it'll still be bloody quick. I'll just have to do a lot more lightening Thanks bud.

Really I wanted a very high performing version of this (my mates L28 engine) and the RB seemed the way to go for it's twin cam etc. Also it'd look so right in the engine bay, sound beautiful, etc etc. However I'm really chasing pretty high hp figures and so it looks like I either go v8 or turbo Hmm I'll see what his 250bhp (190kw) feels like (currently manages a 13.83 quarter) and make my mind up. There are other cars I can build for dragging I suppose. Cheers

That's a really good point, and something I hadn't thought of. Im not getting hung up on numbers, but a few of my friends have just spent a lot of money developing their L6s, gotten to about 250bhp, and then hit a wall. Now they are wishing they'd started with something with more potential so they could keep going (v8 with more capacity probably). We run a nice club drag league, and I'd like to build something that would allow me to take it as far as I wanted (within reason), and if 3ltrs of RB is going to realistically stop me at 225kw then I'd probably be better off opting for a VK engine instead, much as it pains me to do so. Thanks for your help, I think I'll let this one run a bit longer and hopefully someone will come along saying "yes 300kw is very doable".