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-   -   400 Block With a 327 Crank (http://www.hotrodders.com/forum/400-block-327-crank-6676.html)

SS04 02-21-2003 07:42 PM

400 Block With a 327 Crank
 
Has anyone ever put a large journal 327 crank in a 400 block? I was wondering about the pros and cons of it? Would it require the same modifications as putting a 350 crank in a 400 block to make a 377? Thanks for the input.

70 nova 02-21-2003 08:18 PM

As you know 327 had shorter stroke than 350 so it would build RPM faster. I don't what it would be. in cubic inches. A 327 crank in a 400 but sound good. some people put 327 cranks in 350 and all it is a 350.

BstMech 02-21-2003 08:33 PM

[quote]Originally posted by 70 nova:
<strong>As you know 327 had shorter stroke than 350 so it would build RPM faster. I don't what it would be. in cubic inches. A 327 crank in a 400 but sound good. some people put 327 cranks in 350 and all it is a 350.</strong><hr></blockquote>

Psssst...all it would be is a 327.

:p :D

70 nova 02-21-2003 08:35 PM

AS I said i was not sure Never heard of some one doing that.

Shortblock 02-21-2003 08:40 PM

Actually it would be 347.5 cubic inches, with a stock 4.125 bore 400, and a stock 3.25 stroke 327.

BstMech 02-21-2003 08:46 PM

[quote]Originally posted by 70 nova:
<strong> some people put 327 cranks in 350 and all it is a 350.</strong><hr></blockquote>

:confused: 350, same bore as a 327, you put a 327 crank in a 350 block, and you have a 327. :p

DoubleVision 02-21-2003 09:06 PM

Smokey yunick did this same combo to make high RPM engines, he said they made a lot of midrange and were ideal for circle track dirt cars.
And just for 70 Nova,, here.
Cubic Inch Calculator:
bore X Bore X 0.7854 X stroke X number of cylinders =
Or
4.000 X 4.000 X 0.7854 X 3.480 X 8 = 350

nicefrog 02-21-2003 09:34 PM

Here's two basic small valve mildish cam 9:1 engines I made in engine analyzer everythings the same except the block/crank

347 Chev = 437 ft lbs @ 4000 rpm
388 hp @ 5500 rpm

350 Chev = 438 ft lbs @ 4000 rpm
386 hp @ 5500 rpm

In the standard 3300 pound f-body with 10 inch slicks we get a slight wheel spinish

with the 347
11.89 112.8 mph

And with the 350
11.9 112.5 mph

Worth taking notice that the 347 has alot slower piston speed, so it should be able to rev higher before it breaks (about 400 rpm), if you really wanted to impress the crowds you could have a big solid cam and use a 3 inch crank in the 400 block to make a 321 and run 7000+ rpms for the same piston speed :D such an engine would be doing 440 hp at 6500 rpm still with little valves (only changed the cam), running 11.53 and 117.8 mph but with a 4000 rpm stall (3500 was fastest for the other 2 engines but this one needs 4000 to get going) 0-60 mph in 3.1 seconds. Anyway you would need a better top end for those revs all day, ok that's all, I've got to do an online exam now :/


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