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finally building the D17

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D17Dave View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote D17Dave Quote  Post ReplyReply Direct Link To This Post Topic: finally building the D17
    Posted: 12 hours 4 minutes ago at 9:48pm
I've finally got to where i can start building my D17 puller and i wanted to ask again what the thoughts would be on the general idea.
M code engine, bored to 4.375 w/ case 1150 sleeves and pistons
grinding the crank to 2" (half because the crank i have had a spun bearing, half for the stroke)
i haven't het figured what i need for the connecting rods as they're going to need to be custom with the 1.5" piston pin and 2" crank journal- ideally id like to get as close to the head as i can, id like to achieve 12-14:1.
I'm planning on larger valves but on not yet sure how much oversized i can go.
i already have a tall head for better ignition
i haven't yet figured out my cam but im planning on working the gov to get 2k rpm and id like peak power between 1600 and 2k
im working on getting the finals and axles out of a 180. they will need some work to fit in a d17 but that work can all be done in house

where does everyone think im lacking or need to do more research on. 

a question to those who have bored one of these engines. 
what kind of issues do you run into with the sleeves already being past the main bearings? i was looking at mine and its cast into the block to have room for the sleeves to already be recessed into the sides of the block on the far sides of cylinder 1 and 2.

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DrAllis View Drop Down
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Joined: 12 Sep 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 6 minutes ago at 8:46am
I always used straight sleeve material .125" thick and placed a .025" step at the bottom of the block and sleeve to hold the sleeves up. My machine shop guy always bored the block a little off center on the sleeve bores to make things fit better strength wise. I went with 4.630" finished bore. My pistons were custom made by Ross and used .990" tool steel pins the same as a nitro burner drag car used. The build cost of custom pistons is quite affordable and that way I had the "Power Crater" bowl. Custom pistons allowed me to use a stock connecting rod of my choice and get the compression distance exactly where I wanted to be...no compromise. I always made a girdle plate for the center main bearing cap. Why are you using 175/180/185 final drives ???

Edited by DrAllis - 24 minutes ago at 9:28am
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