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231


Pete M

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Hey PM is back!   :)


The 262, is an updated 231... similar to a 252, except it retains the 12V electrical system...

Study up on the MP controllers and intercoolers to get a feel for the packages available...

Somewhat expensive stuff to have if not needed, or not have when you really want them...

Pete,

Add some detail to your avatar... include the KMMU part...

Best regards,

-a-

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9 hours ago, Pete M said:

Does the lb and mb engine have the same intake diameter? Is the wastegate on the mb comparable to a merlin? I'm assuming the mb is intercooled from the factory. What upgrades did the lb get?

The LB's throttle body is larger than the GB's. 

The MB's intake is a well though out design that is much improved over the GB/LB. 

The MB's waste gate is an absolute pressure controller (fully automatic) hydraulically controlled with oil.  They call the Merlyn an "automatic" waste gate but that is a bit of a stretch.  It uses differential pressure across the throttle body to move the waste gate.  It has huge benefits over the fixed waste gate GB/LB, the turbo works less down low and it increases the critical altitude to 19K+ft.  It doesn't really help with engine management though. 

The only upgrade from a GB to the LB is the larger throttle body.  Otherwise they uses the same intake design and same turbo (MB uses a different turbo).  They both were standard without inter-cooler and with a fixed waste gate.  

A 231 with a LB, inter-cooled, and Merlyn is a very capable set up.  But the MB is a giant improvement overall.

Cheers,

Dan

 

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