Re: 360 rods in 318 block
[Re: gogo318]
#1181895
02/19/12 10:15 AM
02/19/12 10:15 AM
|
Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
|
Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
|
Quote:
what if i put 360 rods in a 318 could it even be done? would it make a 340 lol just curious
the size of the engine is calculated by using the size of the bore, and the length of the stroke--how much the piston moves up and down, which is determined by the crankshaft only.
what pistons, rods, heads, etc. you use, will not have any effect on what size the engine is.
**Photobucket sucks**
|
|
|
Re: 360 rods in 318 block
[Re: gogo318]
#1181897
02/19/12 10:59 AM
02/19/12 10:59 AM
|
Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
|
I think the later 318's got the "645" 360 rods
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 360 rods in 318 block
[Re: TheBlueBeast]
#1181898
02/19/12 11:41 AM
02/19/12 11:41 AM
|
Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
|
I Live Here
Joined: May 2003
Posts: 15,487
Florida
|
Quote:
no. the 340 is the same stroke as the 318 but has a bore of just over 4 inches. You can not bore the 318 enough before you clear the cylinder wall. the 360 also has a larger journal on the rod than the 318 has on the crankshaft. IIRC And there is no way to make the rod fit properly onto the smaller diameter crankshaft. And no you can not destroke a 360 back down to a 340 with a 318 crankshaft. unless you want to spent lots and lots of money in research and development and machine work.
IIRC..the main bearings are larger on the 360 crank,they both use the same rods.
they did make main bearing spacers that would allow you to run a small main bearing 318 crank in the 360 block to destroke it.
putting a 360 crank with the mains cut down to 318 size with a stock 318 bore will make a 346 cubic inch and with a .030 over bore and stroker pistons you get a 349 cubic inch.
use of a 4" stroke crank in a 318/340 will get you 390/416 cubic inch stroker
use of a 4" stroke crank in a 360 will get you 408 cubic inch stroker
just boreing a 318 out .030 will get you a 323 cubic inch
I am doing up a 349 roller cam stroker engine myself
|
|
|
Re: 360 rods in 318 block
[Re: TheBlueBeast]
#1181904
02/19/12 01:40 PM
02/19/12 01:40 PM
|
Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
I Live Here
|
I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
|
Basically 4 different SB rods used through the entire production run includeing the poly 318.
1. The 273 and 318 through 71 used the lightest version with bushed small ends.
2. The 340 came out with a slightly beefier rod (all other rods were variations of this one)with a bushing and floating pins.
3. Some time in 71 they came out with an unbushed 340 rod for use in the 360 and 318 until 92 for the 318 and 93 for the 360.
4. When they went to magnum engine desighn in 92 and 93 they used the same basic rod still but they narroed the top end.
All rods are the same length and journal diameters. You can use the magnum style rod in ANY older SB (balance should be checked). The pressed fit 318 360 LA rod can be used in any other SB (they need narrowed small end to fit in a magnum). The early bushed rods can be used in any engine with floating style pistons, some 340 guys will run the lighter 273 318 floating rod to lighen it up, I have seen some of the heavier 273 318 rods that weighed as much as the lighter of the 340 rods, the weights are all over teh place.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
|
|
|
Re: 360 rods in 318 block
[Re: gogo318]
#1181906
02/19/12 11:20 PM
02/19/12 11:20 PM
|
Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
|
I Live Here
Joined: May 2003
Posts: 15,487
Florida
|
no,cant bore the 318 block that much,would need a sonic check and be real thin if it did get bored to that piston specs. cut the 360 crank mains down,get the .030 over 349 stroker pistons,bore your 318 block. they say you can use some early 318 pistons that are way down in the hole on the 360 crank/318 block,just need to clearance the piston pin boss and skirt to clear the crank weights. that will make the 346 cubic inch stroker on the cheap. i just opted for the 349 pistons with the roller cam 318 block.. member "performance only" can cut the 360 crank and take care of the raer oil seal cut with a more than fair price.
|
|
|
Re: 360 rods in 318 block
[Re: dogdays]
#1181908
02/20/12 02:51 AM
02/20/12 02:51 AM
|
Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
|
master
Joined: Jan 2003
Posts: 9,826
las vegas
|
just make sure the "318 pistons" skirts clear the counterbalances on the cut down 360 crank...
scat make a 3.58 stroke crank with 318 bearing size...
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
|
|
|
Re: 360 rods in 318 block
[Re: gogo318]
#1181909
02/20/12 03:40 AM
02/20/12 03:40 AM
|
Joined: Jan 2003
Posts: 857 The Dalles, OR.
Dusted_Ya
super stock
|
super stock
Joined: Jan 2003
Posts: 857
The Dalles, OR.
|
ALL small block rods are interchangable for the most part with minor variations. 273-318 rods were the same for cars up until 1970 (light duty) 70-2 car and 68-73 truck 318's shared the same floating pin rod as the 340. All 360's used the same rod as the previously mentioned floating 318-340 rod only with a pressed pin up until 1994 when the 318-360 went to magnum design which is essentially still the same rod only with a narrower width (on the machined side) as Scratch mentioned. If putting 360 rods in a 318 made a 340 I'd put cummins rods in a 440 to make a 572 monster! But unfortunately it doesn't work that way.
Retired Mopar fanatic
|
|
|
|
|