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Competition Marine Designs, Inc.
Ph: (386)330-2420
andybrownprops
@gmail.com


Features
Bushed Drum Housing

Steel Rod with Needle Bearing and Top Bushing

Strong well designed Crankshaft with 8mm Journal

8mm Shaft Threads

Bolt pattern same as: Picco, CMB, K&B, OS MAX, and Rossi
Specifications
Bore: 24.1mm
Stroke: 24.0mm
Rod Length: 43.2mm
Carburator: 14mm
Displacement: 10.95cc
RPM: 23,000 - 27,000
Horse Power: 5.0-6.0
Current Records
IMPBA 1/8th Scale Unlimited S.A.W.- 84.52 mph.

IMPBA 1/8th Scale Unlimited 1/3 mi. Oval - 23.38 sec.

IMPBA 67 Hydro SAW - 115.2 mph.

IMPBA 67 Hydro 1/3 mi. Oval-17.92 sec.

NAMBA 67 Mono SAW - 74.72 mph.

NAMBA 67 Hydro 1 mi. Racing record - 61.00 sec.

2001 UNW 1/8th Scale Unlimited Hydro Champion -- Jerry Logan

2002 UNW 1/8th Scale Unlimited Hydro Champion -- John Logan

2002 NAMBA National Champion 67 Hydro -- Allan Yuen

2004 UNW 1/8th Scale Unlimited Hydro Champion -- Jeff Stubbers
Recommondations
Use Brown 67 parabolic pipe set at 11.0" or the AB 67 pipe set at 10.8" (center of cylinder to weld).

Use with new MAC 67 header. This new header has a taper machined on the inner diameter.

Head Clearance - .010" to .013"

Nitro - 50% - 60%
Parts & Price List
CLICK HERE to open our price list for the MAC 67 engine, and components.

To view our price list, you must have Adobe Acrobat PDF Reader installed on your computer system. If you do not have it installed, CLICK HERE to download it for FREE.

Mac 21 | Mac 45 | Mac 67 | Mac 84

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