Hypothetical 292 Chevy 6 question

Alex250/292 · Oct 9, 2018

mart3406 said: ↑

A totally hypothetical 292 Chevy 6 question
- I don't know if this would be do-able and
if it was, it wouldn't be cheap, but I'm
wondering if it *could* be possible to bore
the cylinder walls almost completely out of
a 292 Chevy 6 and then install sleeves to
allow for a 4 inch bore? Does anybody know?
Has anybody ever tried something this? If
it it's do-able, I'm thinking that you could
end up with one heck of a really "big 6"!

Mart3406
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mctim64 said: ↑

I just checked a 292 block in the shop and I think if you sonic test and find that you have a minimum .200" cylinder wall you could bore .125" over and still have a little more than 1/8" wall, which is good enough although a little thin. The next problem would be what piston to run. 292s have a comp. height of 1.936" and 2.009" and a 350 has a comp. height of 1.54", 327 gets a little closer but not close enough. You can have some made but they will be pricey.

Now let's look at the 300 Ford. Comp. height is 1.740" with a .975 pin. 390 Ford (flat top 4 bbl pistons) has a comp. height of 1.748" and a pin of .975 also. So with a 4.110 bore (.060 390) in the 300 you can use 390 pistons off the shelf and have 318 cubic inches. Something to ponder.
Click to expand...

I don't know much but if you bore to a 3.9 in and machine a 194 head to fit with lump port and bore and rods to be safe and add a little compression if it could be pulled off

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Hypothetical 292 Chevy 6 question

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