Borci88

That was what stopped me as well

2:1 odds I'd be getting on that

Clean it all, get rid of all traces of oil and go for a drive to see where it starts off again. Bets are on Rocker Cover Seals, Cam Seals, Crank Seal.

Sometimes it's hard to see a cam seal leaking, usually you'll see it down the side of the lower cover and pooled around the crank. It's all about finding the highest point that the oil is leaking from, oil can't drip upwards after all.

What do you mean A4 sized oil leak? Bruh cars oil pressure usually rises with revs, you should know this. More pressure = More likely to leak If it's coming from the front then it's likely to be Cam seals or Crank seal.

Possibly, we don't think it'll work though, more investigation is needed definitely. Same here, you have to remember that the NA had a higher compression than the Turbo models, and therefore longer and thinner intake runners were a benefit to that already gutless motor They are, unfortunately it's not that simple as RPM usually keeps it simple in the head department, only a very small amount of motors have been built like this, and whether or not an NA head has ever been used, I'm not sure. That's how I knew about the Honda piston, the builder said that there is a Honda piston that will do it but he couldn't remember it off the top of his head. Therefore I've been searching to find one but haven't had much luck. This is unexplored territory at this point I believe.

Also to settle your minds, I'm a mechanic and other than machining the head, this isn't anymore expensive or cheaper than going a turbo head. If it works and its good then we've opened up a new line of thinking with RBs in Australia. If it doesn't work then it puts that idea to rest, this is more R&D than anything as I can swap the heads over on a weekend at work.

Do we all know that the NA head won't flow enough or are we just looking at pictures and going nah I don't think that will work? Because it doesn't sound like it's been done before and I'm building it for torque (thus the 2.8, thus the E85, thus the VCT, thus the smaller ported head). The car made 385kw earlier, this head will more than flow that, it's not a waste. I'm doing it to test a theory, Regardless of all that it doesn't answer my main question of Piston. Port size is irrelevant, I need to find out what piston will work with a 52-52cc combustion chamber and an RB26. RB30 stuff doesn't work I understand. Custom is looking like the only option, but thought I'd swing it past you guys to see if there was an off the shelf option.

While you are correct porting it would probably make it more efficient, I'm more interested in torque rather than peak power, and porting the head isn't necessarily going to help that. I've done research into putting VCT into a 26 head and from all accounts you can't do it without going the Otomoto kit or going VCAM. I know of one person who did it himself in his garage but he hasn't revealed details of how he did it.

Fair enough! Thanks for your input I think it was Big Red (the time attack 32), but I can't remember off the top of my head, I'll have to ask. Theres no reason why they won't flow 500kw anyway. Regardless though I'll be aiming for 400kw not 500, but the scope for future would be nice.

I think we went 8.7:1 or so on the last build as just an RB28. There was nothing wrong with street driveability. I will take what you've said on board though and swing it past my engine builder to see what compression ratio would be ideal and what we can achieve. But I can't start working out compression ratios until I can find a piston that can be made to suit. Otherwise I'll just go most likely a custom Wiseco piston. Have you dealt with any of that sort of thing before? This will be a track car as well as a street car.

That was the reason for buying the NA head. It's been proven to flow over 500kw without porting, it's more than enough for what I need. Good question Piggaz, I guess because I will have the option of Flex Fuel. Realistically it's around standard compression with a torquier head with VCT, 2.8 litres and E85. I shouldn't have a problem with bottom end torque and don't necessarily need to go higher comp? Thoughts?

Hey guys, Currently building my motor which was originally an RB26. It now has an RPM 2.8 kit in it and I'm adapting the RB25 NEO NA head onto the block. Due to the NEO head having a head cc of 51-52cc this means I have to change what pistons I use instead of the normal RB26 pistons. I'm aiming for a compression ratio of 8.5:1 to ideally 8.7:1. I'll be running E85 at all times. I need a piston pin of 21mm and a compression height of 30mm. What pistons does everyone use? Everything is pointing towards getting a custom piston made. I've also heard there is a Honda piston that would work with small modification but I can't find anything that would suit. ACL no longer make the pistons to suit. I believe I'm looking for a flat top piston or one with a small amount of dish.

How many of you lads get nostalgia with this choon https://www.youtube.com/watch?v=slN6U6jNDBU

In other news...

It is interesting that only 6 cars out of 120 went faster than 1.25 though as well..

While you are correct, all the praise I've seen are from dudes who own S13s or AE86s or similar on chopped springs so it's a HUGE upgrade for them, same story with the Fords. I'm yet to be impressed by a set yet, always been a let down unfortunately. That's not to say that cars can't be transformed with Shockworks coilovers, I just don't think they deserve the massive following that the drifters rant on about, in my experience anyway.

I'd say reasonably, he's got a quite a few engines on the cards. I'd imagine he could do it sometime next week or the following though.

Hahaha yeah no, don't do this.

I have for sale an Exedy Heavy Duty Cushion Button Clutch & Lightened Exedy Flywheel. The clutch has done 2,000kms including run in on the dyno, I pulled it out when I rebuilt the engine and a good price on a Coppermix came up so I purchased that. Clutch has very very little wear and has been sitting in storage for the last year. Flywheel still has very visible machining marks from machining when the clutch was installed to show that it's done very little kilometres. This clutch is a Pull clutch and is to suit late model R32 GTR and all R33 GTRs. Item is located in south eastern suburbs of Victoria, also willing to post.

Birds get me in on diz and future expl0itz

Who the f**k would want to meet up with just 32 owners..

You'd think there'd be a Scrooge McDuck style vault full of abandoned RB Heads..

Didn't think it would be this hard to find an RB26 head

Code Red Green Apple