Shoota_77

It is possible you did damage. IF the piston is at the top when it should be at the bottom then the valves will be pretty much fully open. Did you turn it over before you realised it was out? If not that would reduce the likelihood of damage. Hopefully your valve lift is not extreme enough for the valves and pistons to make contact. If you're using an MLS head gasket then rip the head off and have a look. You can reuse the headgasket no dramas. Might save you pooping yourself before you hit the key for the first time!

Ha ha, awesome deadblow. That's dedication, getting you're own hammer made! Joke..... Like I said before, it sucks when there's no clear cut reason for the failure.... I'd definately look at your oil supply while it's out. I can't remember if you mentioned about an aftermarket sump baffle? Definately put one in if you haven't.

What sized piston? I have a set of CP rings (1.2mm/1.2mm) for an 86.5mm bore which is the first oversize.

I think that's why he's saying he doesn't drain it back to the sump (oil/water contamination). Not that it doesn't need the venting system.

http://www.goauto.com.au/mellor/mellor.nsf/story2/7BBD4C2884C3EA74CA257BBB00258CAC Not good news at all. Hopefully a buyer can be found. Would certainly be a major blow to car enthuisiasts if it closes. One less option in quality engine bearings to choose from.

I didn't realise you were this far along! Bit late to worry about your comp now! Should be an absolute beast when you're done. Nice straight Vee Ell too!

Ha ha, I hope you're right!! I'm a qualified mechanic but haven't been paid to touch my tool(s) in years. Now I just play for free.....

I'm going with return valve in the fuel pump. If you can, put a fuel pressure gauge between the pressure reg and the fuel pump and see if it drops off.

I'll tell you as soon as it's built. Just in the process of building it now.

I had an SR20DET that I was going to put into my other 1200 but reallocated all the funds to the Skyline. I'll revisit that project again at some point. When I have money again. Ie. never!

You wanna see me get into my Datsun 1200 ute then....

Ha ha! I need to take the bonnet off so my shins don't hit it when I'm working under there! I'm 6'8" though.....

You're right, we should transfer this discussion to the oil control thread.

Yeah they look pretty tall when you're used to seeing 25/26's. Tall is good. Like me....

If the pressure in the sump is going into the catch can then inadvertantly it's going to feed back into the cam covers as it's all linked. The pressure doesn't disappear when it gets to the catch can, it has to go somewhere unless the cam covers are in permanent vacuum which I believe them to only be during closed throttle decelleration. I think having feeds to the head and to a catch can would be beneficial as it should help to create a nice balance of pressures between all sectors of the engine (cam covers, crankcase positive side, crankcase 'vaccum side' (or just lower pressure side if not actual vacuum)). Having a 'balanced' vacuum/pressure situation in the engine should be beneficial as there is reduced pressure in the crankcase causing less oil to be pressurised past the rings and less vacuum in the cam covers which reduces oil draw down passed the valve stem seals on deceleration. This is just my understanding of it and happy to be proven wrong but it makes sense to me! At the end of the day overkill is better than underdoing it. If the hose to the back of the engine does no harm and may help, why not do it? If the engine is built properly and all the failsafes are done then it should be right. It would be interesting to have pressure sensors placed in the three sectors of the engine to see what they're doing under certain circumstances. This would be the only way to 100% understand what is happening. However through a lot of trial and effort by everyone on this site the answers are pretty much discovered anyway.

You're partially correct. I read some of your comments. Most of them weren't worth reading... The hose from the sump to the catch can is not a drain, it's a breather or "pressure equaliser"....

Strong words from a faceless clown..... Don't be so defensive bloke. I was offering assistance. If you don't want help, don't ask.

Finally all of the machining work is done on my engine so I drove to Melbourne today to pick it all up. Set up the "operating theatre" ready for business- All the goodies- Pistons individually weight matched (blueprinted in other words) Oversized valves in- Tomei Poncams- Oil return galleries enlarged- Intakes opened and tidied up a bit- Exhaust ports opened up a bit- Spacer for timing belt tensioner- What all GT-R's should have had from factory.....- That's everything that the machinists have done, now it's my turn. Didn't waste too much time on it but gave the crankcase a bit of a tidy up- Also opened up the oil return galleries in the block to match the head gasket. The block opening is about 6mm smaller than the gasket which is just bloody stupid!- Also opened up the water galleries in the block as well. you can't really tell but I've done the main curved bore water galleries as well- That's all I got done today, still a bit more cleaning up and measuring before I start assembly. Sorry for the photo overkill!

I got mine custom made (CP's) at 9.5:1. Only took a few extra weeks from the states,

He means wait till you spin a bearing or blow up an oil pump (which WILL happen...) pull the engine out, send off the sump to be extended and have additional -10an fittings welded on for venting to catch can.

Yeah good call and totally correct. Fuel was shite back in 1986! No premium or ultimate back then. You need to work out what turbos you're running and what is the intended purpose of your car before you choose your comp. If you're running a massive single and focussing on drag racing or a HP dyno hero then go a bit lower comp and pump in huge boost. If you want a driveable street car or track car with good response and minimal lag out of corners then go a higher comp and smaller turbo/turbos. Do what works for you, not what everyone else has done as we all have our own goals and uses for our cars!

I just ring the tyre shops, they always have them laying around and unless they're a pack of dicks they'll be happy to give them to you.

On day one of this build I was a little bit meh, same old same old but mate you've made all those blokes on the first few pages eat their words (and mine that thankfully I didn't put on paper!!). I hope they've since apologised! This is truly and extremly thorough build and in 10 years will hopefully see this car worth twice any other 32 GTR out there. Hats off to you on an inspiring build that is all about being brilliant at the basics. Well done!

Yeah they be broke..... Bob's in strife.

Sensitive!!! Continuing Lukes post, E85 is always going to be a challenge if it's your only fuel choice. Flex fuel is always a great option. 98 and taking it easy on cruises, E85 and cane it for track work.