This question came from another member, piston speed; please explain.
There are several units we can do the math on. Let’s use feet/minute. The rule of thumb is 3000 to 3500 feet/minute. You can go beyond that point; but the pistons will have to be changed several times. NHRA Pro Stock engines now spin over 11,000rpm. Back in 1995 they turned 8,800RPM. Big changes have happened and technology as evolved. However for us we do not have pockets full of money. A single cylinder two cycle engine like the blaster has a stock stroke of 57mm. If we spin the engine at 8500RPM that would be 3179feet/minute; safe and we have a durable engine. If we install a +3mm crank or 60mm
The piston speed would be 3364feet/minute. Most of the blaster crowd does not drag race; they just want good power for the trails. I am not by any means saying that power pro pipe is no good. They do spin fast; just be aware to check your piston for cracks. I run my own engines close to 4500feet/minute and they do need to be replaced often. When you drag race there is a price to pay in parts replacement. In the trails you are off and on the throttle, so the piston speed is averaged over the time and is under the safe limit.
I hope this helps
Feel free to PM anytime.
There are several units we can do the math on. Let’s use feet/minute. The rule of thumb is 3000 to 3500 feet/minute. You can go beyond that point; but the pistons will have to be changed several times. NHRA Pro Stock engines now spin over 11,000rpm. Back in 1995 they turned 8,800RPM. Big changes have happened and technology as evolved. However for us we do not have pockets full of money. A single cylinder two cycle engine like the blaster has a stock stroke of 57mm. If we spin the engine at 8500RPM that would be 3179feet/minute; safe and we have a durable engine. If we install a +3mm crank or 60mm
The piston speed would be 3364feet/minute. Most of the blaster crowd does not drag race; they just want good power for the trails. I am not by any means saying that power pro pipe is no good. They do spin fast; just be aware to check your piston for cracks. I run my own engines close to 4500feet/minute and they do need to be replaced often. When you drag race there is a price to pay in parts replacement. In the trails you are off and on the throttle, so the piston speed is averaged over the time and is under the safe limit.
I hope this helps
Feel free to PM anytime.