Should I trade up to larger L?

[SPYDERLK]

If you want more power, it would probably be much cheaper to have a custom turbo installed. It's not that much work to do and will give 10hp more pretty easily.

Cost for that would be in the $2-5000 range depending on how much work is done by you, etc. It can be a lot lower if you bend / weld the pipe yourself and hunt up used parts like the turbo etc.

jb

Do those setups include shorter rods to lower compression? I think Kubotas run pretty high CRs - about 23 or 24 naturally aspirated. Seems high for boosting with reliability.
larry

 

[rbargeron]

........ and a max. pressure of 2630 - so I guess that's the number I'm looking for?..........

I think 2630psi is the design maximum - it establishes all the design forces the frame has to withstand without exceeding design stresses. I believe it is common practice to set the system relief valve somewhat below this number to have some margin for assembly inaccuracy, etc. 2000 psi is a common value in use on hydraulic machinery.

 

[john_bud]

I think 2630psi is the design maximum - it establishes all the design forces the frame has to withstand without exceeding design stresses. I believe it is common practice to set the system relief valve somewhat below this number to have some margin for assembly inaccuracy, etc. 2000 psi is a common value in use on hydraulic machinery.

No the kubota spec is the target with a range. They do not want you to be at 2000 psi as the performance of the FEL and 3pt would be significantly below spec. It's common for the springs to wear fatigue and relax to a lower pressure, that's why you have to test it and adjust with shims. 39 psi per 0.1mm of thickness.

Larry,
Kubota is about 23:1 naturally asperated. Adding a turbo you would have a target of 3-7 psi pressure. Not the 20-30 a turbo truck may have. You mostly want to get more low end grunt and have more torque rise as rpms fall. Turbo trucks double and then some the hp. Turbo tractors tpically just beef up the low end, clean up the combustion and add 10-20% more power.

 

[SPYDERLK]

Larry,
Kubota is about 23:1 naturally asperated. Adding a turbo you would have a target of 3-7 psi pressure. Not the 20-30 a turbo truck may have. You mostly want to get more low end grunt and have more torque rise as rpms fall. Turbo trucks double and then some the hp. Turbo tractors tpically just beef up the low end, clean up the combustion and add 10-20% more power.

Well, the turbo 7520 has only 18.5 CR - Im surprised it starts without using the intake heater! I know it boosts over 10psi tho. Maybe thats why they lowered the compression. The 6520 is 19.5 natural with 10 more in^3 and 10 less hp.
larry