Wyn

Have now found a Neo head locally so have put an order in for a pair of Tomei 143023 B cams Strangely finding a matching RB25 Neo or later R34 cas unit seems harder to find then the head was ? Still need to find one or start looking at other ways of timing ? Haven't looked into much else yet and tbh I didn't think about getting the head ported but its not to say I won't What power will a std Neo head run to anyway?

Cheers bud, do well

Can someone tell us if the alloy CAS carrier bracket is the same on all RB engines? Have just picked up a R34 Neo GTT head but without its CAS bracket or CAS unit Does the bracket need to be from a Neo head, or can I get away with a 2.5 GTST carrier bracket or even a RB26DETT bracket but with Neo CAS unit fitted ? Cheers

Cheers, have decided to go for the neo head so am on the lookout for one now As for the 3.4 motor its a done deal. Deposits made so the sooner its built and over here the sooner I can get on with it In the mean time I have my 25/30, turbo and injectors etc etc which I can use to help finance this new build Will see how it all pans out I guess so no doubt I'll have a few more questions lol btw, Talking of injectors am I still likely to get away with my 740 nismo s/feed injectors, greddy copy manifold on a Neo? Or is that impossible to say till its fully speced Cheers

No I don't want to limit it with turbo or head but just thoughts on what would be the better way to go? Maybe there isn't? If I stay with a GTST it will cost to get the head converted to solid and new cams Or if I went neo it will cost again for cams and a head. Both might end up about the same? Yes I use the car up the strip but its not going to be an out and out drag engine, as I still drive it as a day to day car (when its not raining lol) Will see what turns up anyway as neo heads aren't that easy to come by by the looks of it either

As above I can only repeat what I was told by the dyno operator re it still making power all the way to its redline of 7.6kI it would have reved on and made more if it wasn't for the hydraulic lifters btw this is a sunday toy and for occasional drag strip use hence wanting the spec

atm I am using a T3 bb GT35 but with a 1.06 exhaust housing. If that will now be undersized I don't know? But when it was mapped as a 3.0 it wanting to keep making power past its 7.6k rpm (safe) limit so maybe not? As for the rev range yes it seemed odd but as they don't know 100% what I will be bolting onto it that's maybe why? I haven't got a problem with that, more that I am happy I know a safe range ... or max when built Yes the head needs to be right and be able to run to the bottom ends limit

Cheers, from what Spool have told me that bottom end is good for 8 - 9k rpm limit But what head would peeps recommend using between the 2.5 GTST head and the Neo head for a 3.4 conversion? To make full use of that rev capability I have the option of using my current RB25/30 GTST s1 head with Tomie pon cams but still on hydraulic lifters. That I've been advised (and used) 7.6k as a limit and believe it shouldn't be reved higher? Or go buy and build it with a neo head and high lift cams to make full use of the bottom ends rev range 26 head is out as none of my ancillaries are going to fit. Any other options other then convert my GTST head to solid ?

Looking on Spool imports site I see they list a complete RB34 short engine, block, crank and pistons etc etc Has anyone got one and what do you think of it and the build work done? btw, for use with RB25/34 road/drag use cheers

Ok if its no grief and you know the crank to be 100% good still and deffo unmarked then it could still be a go If it is scored or picked up am not up for that though. Post some pics of the parts if you have them and an idea of cost? tbh I don't want to get into using a crank that's been ground or needs it mind. Fussy sure but having it shipped over here it needs to be right first time, sure you can understand

Could be up for that if you know the bottom end to be all good on standard size bores and crank ? Pm me a price if you could as I will need to confirm collection is ok still before I can deffo say yes

Cheers for the offer but I believe that might be too far to ask him to go and collect ? Anything closer would be good

Hi Am just fishing atm but am looking for a good used RB30 bottom end Block, crank and cradle is about all I need but if a short engine then so be it If possible would like to find a good block on standard bores and a standard sized good unground crank Block does need to be the right type with oil, water and lower tension provision already in place mind! I have someone who will help collect/ship it to me, so can now try find a good usable unit Preferably near or around central coast/ Sydney area? As for price let me know what you have as don't mind paying a fair price for a good sound unit cheers

Ok cheer's, i'll leave it external

Just curious as to what exhaust diameter you guys are using with your RB30 builds and if you are running external wastegates or not. Reason I ask is at the mo I've been using a GT35 fitted with a 1.06 exh housing with 50mm external wastegate + screamer and 3" exhaust system (no cat) Engines been making around 580bhp @ 1.4br Am now thinking of returning the screamer back into the exhaust system rather then open atmosphere, but will that sacrifice power, esp if I also up the boost as planning to go to 1.7br ?

Cheers Pete, thanks for sharing the info and adding those pics. That's great to know and makes it look simple to boot !

GTRPSI, just out of curiosity is that a normal 240v hand drill you are using there ? What bits / approx length are you using to drill the oilways out in the block ? Not that i'm building one (yet) but handy to know if n when

Hi, my name is Wyn from Buckinghamshire in UK. I should come clean straight away as I don't own a Nissan, but I down own this old Datsun Z car Few pics added to give you an idea .. Unfortunately its RB25DET didn't last that long so it's time for a change .... So have been looking on this forum for a little while now reading up on RB30's and what's involved in building one. Yep still plenty of pages to go ! Am now having an RB30 engine being built over here in the UK, so its great to be able to read up on whats what, good or bad. Anyways am sure I'll have a few Q's to ask as time goes by More worried about it sticking out of the bonnet then anything else atm lol Cheers Wyn