Dart Bbc Big M Sportsman 9.8, 4.250, Ductile Cap 31273344
MPN: 31273344
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RPI: 185755
Trackable Shipping
Australia Wide
Handling Time
7-10 Business Days Handling Time
(Prior to Dispatch)
(Prior to Dispatch)
Return Policy
No Return (Unless Manufacturer Defect)
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Click & Collect (no postage cost)
Unit 1/25 Bearing Road, Seven Hills, NSW, 2147
Ready-to-pickup: 7-10 Business Days*
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Big M Sportsman seriesblocks are engineered to bestrong, reliable, easy tobuild and affordable. Withmultiple deck heights andbore sizes up to 4.600",the Big M Sportsman blockgives you the versatility tobuild a wide variety ofengine combinations. A truepriority main oiling systemoils the main bearings beforethe lifters for extrareliability.
Features:- Standard9.800" and tall10.200" deck heightsavailable for strokerengines.
- Standard4.250" , 4.500" or4.600" bore sizes withsiamesed extra thick cylinderwalls to resist cracking andimprove ring seal (minimum.300" thick with4.625" bore).
- Uses +.300" tall Gen VIstyle lifters. Modificationfor Gen IV style available.
- Scalloped outerwater jacket walls improvecoolant flow around thecylinder barrels to equalizetemperatures.
- 2 boltfront and rear and 4 boltinterior ductile iron maincaps have splayed outer boltsfor extra strength.
- Crankshaft tunnel hasclearance for a 4.500"stroke crank with steel rodswithout grinding.
- True priority main oil systemlubricates the main bearingsbefore the lifters. Ourstepped main oil gallery(9/16" to 1/2" to7/16") increases theflow of oil to the crank athigh rpm, and our front oilcrossover eliminates internaloil leaks around thedistributor shaft.
- Oil filter pad is drilled andtapped for an external oilpump.
- Lifter valleyhead stud bosses preventblown head gaskets.
- Rear main cap uses standardoil pump and two piece seal -no adapter required!
- Mechanical fuel pump boss,clutch linkage mounts, andside and front motor mountssimplify installation in anychassis.
- Dual oil panbolt patterns fit standardand notched oil pans.
- Coated cam bearings, freezeplugs and dowels are NOTli>
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