8k, no load, no problem. sounds strong.
will keep this updated after I haul the mail in sand.
14k rpm 0 deck
Moderator: Team
Re: 14k rpm 0 deck
You know, with a temporary auxiliary muffler or maybe just a pillow held over the exhaust outlet, you might be able to slowly run it up in neutral and hear any early sounds of contact. 
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
-
bentvalves
- Expert
- Posts: 537
- Joined: Mon Dec 12, 2016 3:37 pm
- Location:
Re: 14k rpm 0 deck
according to a compression ratio calculator i'm using, I am now at 15:8:1 compression ratio up from 13:2:1.
did not realize ripping .030" off the base of the cylinder would result in such a bump
did not realize ripping .030" off the base of the cylinder would result in such a bump
-
bentvalves
- Expert
- Posts: 537
- Joined: Mon Dec 12, 2016 3:37 pm
- Location:
Re: 14k rpm 0 deck
I am updating this as I said I would.
the engine was put under sustained heavy load this weekend running deep snow and elevation all the way on up to 14K rpm for like 20 seconds at a time, repeatedly, over and over and over again.
Increased blowby is being noted, but the engine is using 0 oil, and I have never come close to loading it as hard as I did this weekend.
also, max cylinder head temperature noted running it at ambient 10-25*F was 150*F
In the summer cylinder head temps get up around 200*F, so there is still room for things to change.
the engine revs HARD and performs well at this point.
I have to wear earplugs under my helmet as the sustained high RPM begins rattling brain cells quickly.
the engine was put under sustained heavy load this weekend running deep snow and elevation all the way on up to 14K rpm for like 20 seconds at a time, repeatedly, over and over and over again.
Increased blowby is being noted, but the engine is using 0 oil, and I have never come close to loading it as hard as I did this weekend.
also, max cylinder head temperature noted running it at ambient 10-25*F was 150*F
In the summer cylinder head temps get up around 200*F, so there is still room for things to change.
the engine revs HARD and performs well at this point.
I have to wear earplugs under my helmet as the sustained high RPM begins rattling brain cells quickly.