The Jalopy Journal
After a prolonged pause whilst other things in life dominated, I’m back on with my 331 Caddy Engine build. The crank is now ground, and I’ve had...
Hi Jeff, thank you. I’ve just read that the Intake Valve is the same 1.75” on your ‘56 365 Heads as my 1950 331. Do you have the Cylinder Head...
There is a discussion about Rod length here. http://www.enginebuildermag.com/2016/08/understanding-rod-ratios/ I was attracted to the idea of a...
So whilst the 390 heads are being machined, I’ve started de-shrouding & lightly porting the 331 heads. I’m no expert but have read a few books &...
Good idea & we discussed doing that. But I need to increase the bore Radius by 0.109” to get from 3 13/16” to 4.030”. At the thinnest part of my...
[IMG][IMG][IMG][IMG] Well my Engine build, original 331 matching numbers block with later 390 heads, has taken a wrong turn. The original block...
[ATTACH] [ATTACH] I’m seeking to bore out a 49-54 Cadillac 331 engine to 4.030” so that I can fit 390 heads with larger valves. If I stick with...
Hi, do you happen to know what year & Car your block cam from. Or better still the stamped on number at the rear just above the bellhousing area....
Hi, that is what I heard too so I was confident with my Series 61 1950 9Mxxxx block. But it has the thin patches on the cylinder walls. I’ll keep...
I just found this data from "The Ultimate American V8 Engine Data Book" which should help a little.
Hi, I’m not convinced that can be the whole picture, didn’t the 55 lose the bellhousing cast on the back of the block but C322348’s is bored to 4”...
Just found a rough / rusty 331 in the UK and am about to knock the pistons out of that block to see if the wall thicknesses are any good for my use.
Here are the flow results from the two runs that I've had done, at 102 Water & 28" water pressure drop, on the stock Cadillac 390 heads. this is...
Here are the results from my 1950 331 block wall thickness ultrasonic measurement. Clive Bond of Ultimate Race Cars in the UK tested it and he...
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The Jalopy Journal