383 stroker question, not a common one
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
The common 383 is a 350 block bored .030" over with a 3.75" stroke, a derivative of a 400 crank shaft. 4.030" bore X 3.75" stroke = 383 inches³. There is no reason to waste money boring a perfectly good block, "just because". You will have to do your own math but the 4.00" bore with a 3.75" stroke ought produce around 377 - 378 inches³. If you are really on a budget and clever, you can save buying pistons too.
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Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
My car is running a 377 (stock bore with a 383 crank). When we tore it down the bores were good enough to be honed to stock-size Hyper pistons. They run less clearance than stock, so even though my stock pistons had lost compression the hypers were over just enough that I had to hone but not re-bore.
Drifting
Joined: Jul 1999
Posts: 1,337
Likes: 0
From: Brighton, MI
As noted, stock bore is just fine, but you will have to bore if you want a "383". Without the bore it will be a "377". You'll still have to look at clearancing the block though, so you'll likely be at the machine shop with it anyway. If you are dead set on stock bore, you could look at a crank typically used for a 396 (3.875 stroke) and make a "390".
Thread Starter
Advanced
Joined: Mar 2008
Posts: 50
Likes: 0
thanks guys. that did help. i do plan on buying an all forged internal stroker kit, so i can hopefully add some nitrous or Fi down the road. But a good friend of mine told me to just do a 383 stroker for now. The friend is a graduate from UM in mechanical engineering, so i decided to follow what he said.
thanks
thanks
