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Author Topic:   Dart Blocks
2nd2none
Dirt Freak

Total posts: 368
posted September 06, 2002 04:31 PM
If a guy was to buy a brand new dart 350 block, what machine work would need to be done to make it race ready??? I've already got all the rotating assembly so i would guess the block would need to be decked unless i can order a block that already has the deck height that i need. Does it need to be bored and honed or just honed.???? The block I had the parts in is fine other than its a 2bolt. I was wanting to put 4bolt splayed caps on the stock block, but would it be cheaper/better to just buy an after market block.

Monster
Dirt Maniac

Total posts: 135
posted September 07, 2002 09:36 AM
I've only done one of these blocks, so I am talking from very little experience. We bored that block oversize right away, but if I remember right, stock bore pistons would have needed to have a couple of thousandths honed out to make them fit. Not a job for a glaze breaker. We used custom pistons, so deck height was not an issue. IMHO, the biggest job is fitting the lifter bores, which are undersize. No outside shop had ever done a satisfactory job of this for me, so I bit the bullet and bought my own setup. The bores are siamesed, so you will need to do the long little hole bit for cooling if so inclined. Then just normal deburr, thread chase, and clean. The blocks are beautiful, strong, heavy, and the best way to go, but they are a little more expensive initially than a full-on prep of a stock block. But when you figure that it will last longer than several stock blocks(barring explosions), and will make more power, the investment is justified. For my own program, my last stock block is in the car now. I have a Dart in prep, and next year the stockers will be backups.

brownstone
Dirt Maniac

Total posts: 120
posted September 07, 2002 11:06 AM
Monster speeled it out right for you. THe last two dart blocks that we did also called for a special stone to be used jsut for there blocks when doing boring or honing. It was one we did not have and had to buy it was not cheap. BUt in the end the block is awesome and will last for quite sometime. The blocks come in two forms you want that is fully machined this will same you some trouble in the end because some of the work is done for you.

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