jonbill

good recipe for more rebuild work.

I've heard that carbs can get better atomisation than injection. certainly the airflow through the venturi isn't the same as on ITBs. perhaps helps to vapourise the fuel. anyway, ultimately if they both deliver the same amount of air and fuel as each other, then they will produce similar power, all other things being equal.

Yeah, I don't think injection can necessarily beat well tuned carbs, but its a damn site easier to tune injection well.

sell the OERs and get ITBs and injection.

check and confirm its not water/coolant. Take the spark plugs out - are they coroded? what do the tips look like? (post a pic) have you had the valve cover off? it could be oil thats run down from the top. try cleaning it all up running again to see if more emerges.

you should port match the manifold to carb body.

I always set my clearances cold when I'm going to run the engine cold.

Well I'm glad I found this thread, I was about to adjust my clutch by disconnecting the yoke and unscrewing it from the rod!

main journal is 55mm, rod journal is 50mm. I think it must be more or less impossible to install one in the other.

fwiw, my block that Ali pictured above is a mid 80s v57 LD block. It came with no crank case vent holes of any kind. We drilled and tapped it (1" NPT maybe?) and I fitted that hose connector.

2mm are small lashpads. do you have new valves? springs?

A wooden stand like this is handy for fitting the flywheel and clutch. its easy to make around an engine or sump with a bit of decking board. You can even put castors on it to roll the engine around. (corner needs to be cut away for the oil pump before use!)

its pretty normal for it to look very low on the gauge at idle and warmed up. I wouldn't worry about it as long as it ahows higher when driving.

Yes, it's a Speeduino ECU. I wasn't suggesting it as a solution, just evidence that the engine likes a lot of advance at idle.

its normal to run well or better with that sort of ignition advance at idle. I run 24° advance at idle during warm up to keep the revs up. The cam timing isn't really involved in how much ignition advance the engine wants. it might be involved in running like crap, but I'd ignore the cam until you've confirm the things the guys have mentioned. 1. confirm the engine really is at TDC when the pointer/pulley say TDC 2. check the vacuum advance works 3. check mechanical advance works 4. check what 'all in' ignition timing you have with a timing light (and no vacuum advance)

Try the green 'add files' button.

my flywheel lock tool. I think it came out of the scrap pile ready formed.

when it is in this "lean" state, does it feel normal to drive, or hesitant? 16s is prety lean and I'd expect you'd feel it, so if you don't feel any difference, I'd think it must be an air leak in the exhaust before the sensor.

That crank does have an auto adapter on the back there. It shouldn't be there on a manual gearbox. They can be quite firmly attached, but it will pry off.

the mounting is different for auto vs manual I think.

why not go bigger? 86.75mm is a bit of a meh size. many will have flat top pistons in 88mm+

I've had the RT mount for few years and used 3 or 4 diffs over that time. The diff is squashed between the RT mount and the Nissan mount. I have no noises unloading the diff (with any of the diffs) , but on the first diff and the current one I could get the clunk on loading it. The one that had no clunk ever did develop a serious whine and on checking, the pinion is worn. My conclusion is that the clunk in my case is down to the clearance between pinion and crown wheel, and I'm happy to live with a clunk occasionally if It means I'm not killing the diff!

are '73 style' pistons flat top? If so, it'll be pretty close I think. I'd mock it up with plasticine and check how much clearance there is.

Is your question about clearance between valve and rocker or valve and pistons?

I suppose you might get lucky and only have to take material off the new cap. maybe you could weld the new cap in prep. But I'd think just buying a complete l28 block would be easier and cheaper.