How much boost on stock internals???

wernhersey · Jun 17, 2010

I am seeing some crazy horse power numbers out of the turbo 2 stroke engines but nobody ever talks about internals. I am looking to boost my 04 600 liberty but Im uncertain as to how much force the stock bottom end can take? Pistons? Rods? Crank?

clutch man · Jun 17, 2010

wernhersey said:
I am seeing some crazy horse power numbers out of the turbo 2 stroke engines but nobody ever talks about internals. I am looking to boost my 04 600 liberty but Im uncertain as to how much force the stock bottom end can take? Pistons? Rods? Crank?

Any thing above 8 psi will stop the oiler.
With that motor and pre mix 12 would be safe.
Ran a 2000 700 pol rmk at 17 for a few drags no problems but did put it back to 12 to ride it. With that 600 if you got to pre mix you will have to take the motor apart and drill the case's to get oil i to the out side bearings and put on a kit to pump oil in to the water pump/oiler shaft compartment.

tree climber · Jun 18, 2010

oh my... thats the first i have heard of the oiler stopping. i ran mine above 8lbs but nothing happened guess i was lucky so far

Jkinzer · Jun 18, 2010

their on carb'd motors... yours is efi correct tree_climber? i've had mine at 20lbs before with no issues. just proper fuel. longevity doesnt last at that rate though. on average i run 10-14lbs and change out the top end every 1000-1500 miles. i upgraded to indy dan's torque master bottom end after my first season and reccommend it for all turbo apps.

wernhersey · Jun 22, 2010

Awesome info guys! This is going to be a budget build so please bare with my foolish questions. Can anyone tell me how these guys tune the carburated engines? What is used to adjust the air/fuel mixture? Anymore information on on 2 cycle turbo setups would be greatly appreciated. Thanks again.

clutch man · Jun 22, 2010

Jkinzer said:
their on carb'd motors... yours is efi correct tree_climber? i've had mine at 20lbs before with no issues. just proper fuel. longevity doesnt last at that rate though. on average i run 10-14lbs and change out the top end every 1000-1500 miles. i upgraded to indy dan's torque master bottom end after my first season and reccommend it for all turbo apps.

yep that is for the carbed motors i did not clarify that.

1badcowboy · Jun 28, 2010

we had a 97 xc 700 with a turbo on 13lbs of boost and it still runs good after 3yrs of use

Search

How much boost on stock internals???

wernhersey

Free Member

clutch man

Well-known member

tree climber

Well-known member

Jkinzer

Well-known member

wernhersey

Free Member

clutch man

Well-known member

1badcowboy

Member

Similar threads