Interesting Paul. Maybe the fuel quality (in terms of octane rating) was lower in India so they dropped the compression accordingly?
@mrdoyle211
Жыл бұрын
I made a mandrel and shortened my Indian Bullet 500 barrel yesterday but stopped at 1mm removed as the landing around where the pushrods pass through looked to be getting a bit thin ?....Weird coincidence that this video is posted literally as I was doing the work...Best regards Stuart
@norsehall309
Жыл бұрын
G'day from Australia, Paul, thanks for the update on the different types of 500cc / 350cc English/ Indian heads, if you had to do a rebuild it wouldn't hurt to use either at a push, cheers mate Neil 🤠.
@anythingoldmechanical
Жыл бұрын
Great interesting upload Paul, but you can hardly hear it!
@paulhenshaw4514
Жыл бұрын
Sorry about that, I was trying to speak up, too.
@hermangibbs8163
Жыл бұрын
Very informative. Thanks !
@tarnand6376
Жыл бұрын
Thank you Paul. I am wondering what would be the resulting compression ratio on 500 Indian Bullet with standard piston if the barrel height were reduced from its original 77 mm to 76 mm? Any idea?
@paulhenshaw4514
Жыл бұрын
Probably around 7:1, or thereabouts.
@tarnand6376
Жыл бұрын
@@paulhenshaw4514 Thank you.
@lotus7even
Жыл бұрын
Paul I’m looking to rebuild my 61 trials Royal Enfield with British 350 Bullet engine with aluminium head and and low compression piston from Hitchcocks do you have any advise on best way to build this up.
@thomasobrien5976
Жыл бұрын
How easy is it to change a 350 to 500? Is it possible? I know you would need a bigger carb
@paulhenshaw4514
Жыл бұрын
It can be done, but the crankcase mouth needs opening out, the barrel studs need moving outwards, it is not just a spanner job!
@Kevin-cy9cv
Жыл бұрын
Interesting, the fatter edge fins may have a small effect on cooling too.
@750triton
10 ай бұрын
Yep. Likely to store more heat
@um3079
Жыл бұрын
The amount of fins is higher in the British ones aren't they?
@JohnChamberlain-ef4ro
6 ай бұрын
I am assuming that you remove the 1mm from the bottom gasket face?
@paulhenshaw4514
6 ай бұрын
Yes, that is the easiest place to do it. sometimes 2 mm is removed.
@JohnChamberlain-ef4ro
6 ай бұрын
@@paulhenshaw4514 Thank you Paul. My barrel is 77.1 How do I know how much to take off, do you have a method to figure it out?
@paulhenshaw4514
6 ай бұрын
Make it so the edge of the piston crown is level with the top of the liner spigot - that is all I do.
@neilmcintosh1200
Жыл бұрын
What are the quoted sizes?
@paulhenshaw4514
Жыл бұрын
Hi Neil. Not sure there are any as such, but many Indian barrels seem to be slightly taller between their gasket faces than their British counterparts, going by my experiences, at any rate.
@ekspatriat
Жыл бұрын
Typical when you let the colonials out from under your gaze!
@highdownmartin
Жыл бұрын
Probably because they have low octane fuel, as the faces are square it’s not a mistake, it’s deliberate.
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