Yep,
You can use an RC Big Block in a street bike if,
You don't run to big a bore.
You don't run to much compression.
You don't run up against to many traffic lights.
You don't flog it ie ride it to hard.
You don't ride it when it's to hot.
Cheers,
Brian
OK good advice but not really hard numbers in there. When did they fail on you? under what circumstances? what temp? engine? ambient? usage? tuneup fat or lean? oil-cooler? what oil?80%full throttle or 30%? etc.?etc?
I am open to learn from fellow riders' experiences. In forty years of building and riding bikes however I have met and had the displeasure to come across a gargantuan number of "in the general direction but really nowhere near the goal" type of people. Your racing pedigree does bestow merit upon you. It gives credit to your writings, however in this case of solid aluminum (US spelling) cylinder blocks from the RC heyday era I would not discount it that easily.
Firstly there are people who have ridden bikes with these blocks on the road without special care or anything. Secondly a quick thinkover will reveal that heat dispersal is through the exhaust and cylinderhead mainly. Besides that tuning as in AFR (Air Fuel Ratio) is a big factor in heat management. Consider a gasoline engine. Some say the 14.7 stoic ratio is maybe ok for MPG ratios but 12.5 is the way to go for all out power. Note the latter will run significantly cooler (because of the cooling effect from the excess fuel) and might foul parts of the engine at a considerable rate.
Perhaps another thread to go deeper into tuning of aircooled bikes since I have a stable of only aircooled bikes.
Bottom line: I think you can get away with riding you CB 750 with a RC alu block in normal day use/traffic. Just not in all circumstances and in all places for an arbitrary length of time.
If you don't believe me ... just dare me
Hard numbers?
No...I don't have any hard numbers.
As a lot of the older heads on this forum may tell you I am by no means a "tech head"
Nor do I ride these bikes on the road.
I am in fact just a bozo from the sticks here in Australia.
But my mates and I have spent the last ten years trying to eek out every drop of usable horse power we can out of these old girls and believe me it is a real love hate relationship.
During those ten years we have tried these blocks and they could not do the job we asked them to do, simple as that.
They are I'm shore, very good at what they where designed for.
But I don't believe that was tooling around in a road bike.
As for daring you, well..............
I've contributed to this topic and given you my opinion only to save you some heart ache.
Others have a different opinion, that's fine I would certainly not hold myself up as a definitive expert.
Knock yourself out, give it a run.
Cheers,
Brian