Interesting idea there, i've thought about doing the opposite (NC24 heads on a 30 engine, just to do away with the shims)Drunkn Munky wrote:on the ball there neo as always :)
So could the barrels from a 24 be fitted to a 30 and still use the 30 heads?
Is this for some boring out process?
As CRM has said, the barrels are part of the engines crank-cases.
I think you could transfer all of the NC30 internals into a set of 24 crank-cases and fit the 30 heads, you'd need to keep the NC24's oil pump and oil cooler, or blank off the oil cooler ports if using the NC30 oil cooler. This seems the easiest thing to do. (might be a bit of drilling / tapping blank holes etc but since your only using the barrels and crank-cases, everything should line up pretty good with the least bit of effort)
If it is a straight swap then I wouldnt' bolt NC30 heads onto an NC24 (that is using the NC24 crank / pistons etc) as the pistons were changed (probably due to the valve size change)
It's been a long day today I can think of the following ideas to try. (if you let me know what your planning on it'll be easier to visualise)
* None of this has been tested, I can't see much of a reason why it wont' just bolt together, but as above, some tapping / shimming might be needed where things are slightly different.
Scenario A:
Transplant all of the NC30 internals into NC24 crankcases and fit NC30 heads.
Seems the least amount of work but I don't know what the objective for doing this is?
Scenario B:
NC24 engine but with NC30 cylinder heads. (180 deg firing bike) - NC30 Pistons probably needed too.
Cam gears are a different part number so i'd want a set on hand just incase the 24 ones won't line up. I'd also fit the NC30 pistons as they are different (I believe it's to do with valves, so last thing you want is to find it all bolts together but end up bashing valves off pistons).
The only part i'm not sure about would be the cam-shafts.. you'll obviously need the NC24 camshafts using a 24 engine with NC30 pistons and heads. The heads are a little different (shape is one obious thing) and there are a few different bolt holes here and there. (The NC30 has two torx bolts that seem to block something off in the middle by the cam-gear, the NC24 doesn't have this)
Providing you can get it together I can't seem much advantage? Maybe slightly better valving that the 24 originaly had and shims instead of locknuts? Expensive and time consuming for not much I can see.
Scenario C:
NC30 engine with NC24 heads.
Again it's the reverse of Scenario B (I was interested in this)
Locknuts instead of shims so easy to adjust and larger plug holes. I wouldn't think the pistons would need to be fitted as the NC24 valves I believe are slightly smaller than the NC30's so not an issue there, again my biggest concernw would be getting the camshafts mounted.
Never bothered in the end as it was a lot of effort.
If I ever get two engines at the same time then i'll have a play about and see what can be assembled where (good for building something out the parts bin).
I'd be tempted for the NC24 gearbox and oil-cooler and just drill a standard NC30 J spec engine to take the oil cooler, you'll need to do something about the lower rad bracket as it mounts to one of the oil cooler exits, but apart from that they should both drop in.
