The Dart block is offered in two versions that replace the B18 and B20 castings. Both are built to withstand the extreme cylinder pressures created by turbochargers and nitrous oxide injection. Dart has increased wall thickness in all critical areas and beefed up the bottom end with steel main bearing caps.

We met with Dart Machinery after SEMA and learned a bit about their Honda B18 and B20 Race Series blocks. Dart offers these blocks in two versions that replace the factory Honda B18 and B20 castings. Both are built to withstand the extreme cylinder pressures created by boosted applications or nitrous injection.

Honda B20 Aluminum Block, 81.5mm Bore See more product details Free Shipping - Ships on 07/30/25

Dart B20+ block has extra-tall 8.900 (226mm) deck height and 84.5mm bore for increased displacement. Aerospace quality C355-T6 virgin aluminum alloy provides maximum strength and durability. Replaceable ductile iron dry sleeves are fully supported to reduce bore distortion and enhance ring seal.

Find many great new & used options and get the best deals for Dart Engine Block 31496802 Race-series for Honda B20 at the best online prices at eBay! Free shipping for many products!

Obviously depends on how good the tuner is, just curious how it compares to a stock b20 and it’s sleeves. Dart does not have a stated hp rating on the 301-31496802 block. JEGS 80059 - Rotating Engine Stand [1000 lb. Capacity]... ATK Engines 351 - Remanufactured Crate Engine for 2007... Dart 31264655 - Aluminum Big M Engine Block 4.600" Bor...

Dart tall block is 14mm taller than stock B20 block currently on (3.740")95mm storke with (5.967")151.5mm rods length. For some reason I rebuilding it now and want to reduce the storke for (more higher rev thrills) and to get a better rod to stroke ratio (more efficient).

Find Dart Engines, Bare Blocks Honda B-series Main Journal Type, Aluminum Engine Block Material, No Raised Cam Location and get Free Shipping on Orders Over $99 at Summit Racing!

2009年3月25日 · We offer the Dart Honda block in two versions that replace the B18 and B20 castings. Both are built to withstand the extreme cylinder pressures created by turbochargers and nitrous oxide injection. We increased wall thickness in all critical areas and beefed up the bottom end with steel main bearing caps.

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