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Original Message
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| RE: Can a 332 MD be bore out to a 390? |
| By Dave Shoe - 08/01/2001 1:52:33 PM; IP 12.2.11.131 |
I haven't had the chance to dig inside a 330FT yet. I'm not sure how thick the cylinders are. I'm sure they have lots of extra meat, but adding .125 or .175 to the stock bore is asking a bunch.
If you could tell me what drill bit sizes fit/don't fit between the cylinder jackets (from the core holes), that would allow me to do some calculations. Be aware that the cylinder jacket has a taper to it, so you'll want to check the cylinders at several locations, in particular, about two inches from the top of the bore.
Based on my experience with the 361/391 block, I'm gonna guess that 4.00 is a possibility, but 4.05 is probably a no-go.
Note that the drill-bit test does not check for core shift, only nominal thickness. If it turns out you have enough material to bore it out +.125, then you'll still want to do a sonic mapping of the cylinder walls to verify core shift is satisfactory. If core shift is not, then you'll have to use the sonic map to "offset bore" the block to prevent thin spots in the cylinder walls.
Shoe. |
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This thread, so far...
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