Briggs Raptor

[lil Digger]

Can anyone tell me how to tell the difference between a stock 5hp. block and a Raptor block. I'm talking about just the bare block. Thanks in advance.

 

[CarPlayLB]

The Raptor will not have the governor hole drilled in the case.

 

[Havasu Dave]

And the lifter bores and valve seats are angled towards the bore.

 

[creia]

My son performance-upgraded a Briggs Raptor engine for his Bonanza 1300 a few years ago. I seem to remember that the cylinder bore had a steel liner (as opposed to aluminum), and the crankshaft was ball-bearing supported in the sidecover and maybe even the other end in the block.
Michael

 

[CarPlayLB]

Raptor's came with steel bore and cool-bore (aluminum). I have not seen a dual bearing Raptor block, although anything is possible. The kart guys claim the bushing block was stronger! All had a bearing sidecover.

 

[Twid]

My raptor doesn't have dual bearing. Raptor3

 

[creia]

My son just informed me that his Raptor engine has a (pressed-in-place) REPLACEABLE BUSHING in the block on the flywheel side. That way, you wear out only the bushing, not the hole in the block.
Michael

 

[lil Digger]

Just talked to Cort Turner of Turner Racing in Barnesville Ohio today and he said none of the Raptors had dual bearings. And yes they did come in kool-bore and steel sleaved. Long story short, ended up buying a NOS Raptor II from him that he had under his bench for years. Shoulda bought a lottery ticket today!