Herb Becker's new Land Speed motor pics... 3rd time's a charm??

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Cylinders, Sleeved with LA Sleeve FL80 sleeves, then bored to 81mm.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


"BSA style" lifters.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Lifters extended to maintain stability in lifter block with high lift cam (.480" lift)
Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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Herb Becker 1 pc pre-hardened 4340 steel crank. 73mm stroke, and custom pistons from JS Motorsports. Carrillo rods. Notice the ring lands moved down to accomodate deeper valve pockets.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Material removed from under piston to lighten up.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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44mm intake, 38mm exhaust valves, 7mm stems, JS Motorsport BeeHive springs.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Modified "Big Block" Chevy pushrods.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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JS Motorsport "Stage 4" cam, .480" lift.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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Steel "girdle" bolted to drive-side crank case.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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Great pictures. Are those carbon fiber push rods? The only Commando engine (872 cc road racer) I've seen use them didn't end too well. One of the push rods disintegrated.

These are the remaining three. I notice that yours are larger diameter, so should be stiffer.

Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Ken
 
Ported and flowed head; 38mm intake, modified intake face plate
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


re-angled valve guides (+2º)
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Shortened valve guides
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker intake runner.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??
 
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Great pictures. Are those carbon fiber push rods? The only Commando engine (872 cc road racer) I've seen use them didn't end too well. One of the push rods disintegrated.

These are the remaining three. I notice that yours are larger diameter, so should be stiffer.

View attachment 9838

Ken
Big Block Chevy pushrods.
 
Which carbs do you plan to run on it this year? I think you mentioned previously that you had 38, 40, and 44 mm Mikunis to choose from. The size of those manifolds look like you might be running the big guns.

Ken
 
Are the lifter extensions bronze welded or silver soldered? Want to do this myself but don't want to upset the stellite bond.
 
Which carbs do you plan to run on it this year? I think you mentioned previously that you had 38, 40, and 44 mm Mikunis to choose from. The size of those manifolds look like you might be running the big guns.

Ken
We ran the 44m Mikunis on the 920cc motor last year; we found they worked great in the 1/4 mile at the drag strip, but we feel they were a bit big for a 3 mile run on the salt (not enough velocity for sustained 7500rpm), so we will be trying the 40mm carbs on both the 920 and the 750, with 38mm carbs in reserve to try as well, in hopes of increasing the velocity (and rpm.)
 
Herb Becker 1 pc pre-hardened 4340 steel crank. 73mm stroke, and custom pistons from JS Motorsports. Carrillo rods. Notice the ring lands moved down to accomodate deeper valve pockets.
Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Herb Becker's new Land Speed motor pics... 3rd time's a charm??


Excuse the novice question here, how is that flywheel secured?
 
Re; "Excuse the novice question here, how is that flywheel secured?"
T slot- you can see it if you magnify the pic.
 
Is there not a hole on the bottom of one flywheel weight that appears to have some sort of Allen screw bold going through it?
 
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