Hey GT your thoughts 360 vs 383? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 10-29-1999, 11:49 AM
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Hey GT your thoughts 360 vs 383?

Id like your opinion on this matter.
I Have two motors
The 1st one a 360 that came out of my 85 Ramcharger, 300k miles. Heads have never been pulled & in need of a rebuild.
The 2nd one a 383 that came out of my Fathers 67 Coronet . this motor is ready to go to work .
Originaly I was going to put the 383 and its mated np 833 into a doner car or 2wd truck.and rebuild the 360.
My thought haves changed however cause ive been hauling the 383 around for about 5 years now and havnt done anything with it
and I have an 84 Ramcharger in need of a motor. Ive found a 727b $50.00 that will alow me to mate the 383 to the np208.
What id like to know is what your opinion is on running a Ramcharger with a 383 vs a 360. Not sure if they put 383's in the older
ramchargers, I know 400's 426's and 440 's were used.
Rudy


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post #2 of (permalink) Old 10-30-1999, 03:50 AM
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Re: Hey GT your thoughts 360 vs 383?

this would be a long post,so I'll cut to the chase, use the 360 its got more stroke and better heads.Stroke makes torque.call
me and I'll tell you how to build the 360 cheap and it will out perform the 383...///GT,301-933-5277

post #3 of (permalink) Old 10-30-1999, 09:41 AM
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Re: Hey GT your thoughts 360 vs 383?



For power and torque, you can't beat cubic inches. Go with the 383, big blocks have more torque than small blocks unless you really build them up, and torque is what turns those tires. Plus, if your concerned about mpg, the 383 should do as well if not better than the 360 if you don't get carried away on your carb. The more cubic inches the less effert it takes to move the vehicle. The only reason I'm not running a big block is because of not having a OD tranny available. Steve

Mopar360yj
87yj+20,74CHR.030360,SOA,35BFGATs,46RH,241DHD,
D60-44-4.10
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post #4 of (permalink) Old 10-30-1999, 10:58 AM
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Re: Hey GT your thoughts 360 vs 383?

Hi,
I'm just finishing a swap: 383 into a 73 Power Wagon. Here's a few thoughts: 383 was never used in a Dodge truck except 67-68 D250 & D350. Motor Mounts can be found a a company called Bouchilon in S. Carolina. You'll need to manufacture your own Power Steering brackets, and you'll want to upgrade the suspension in the front... big weight difference.

Beyond that, the 383 is one of the best big blocks ever made. Stock, it will outperform a moderately built 360.

Write for details or w/ any questions... glad to help.
- AJS

- AJS

post #5 of (permalink) Old 10-30-1999, 02:45 PM
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Re: Hey GT your thoughts 360 vs 383?

Bouchilon also has the power steering brackets, and the weight difference i2 less than 100lbs to start with. Put a aluminum intake on the 383 and the difference drops to less than fifty.

post #6 of (permalink) Old 10-30-1999, 10:36 PM
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Re: Hey GT your thoughts 360 vs 383?

Hey Rude,
Ramchargers came with 6 cyl,318,360,400 & 440's. 383's and 426's were not available. After talking to you in Chat on Thursday nite, I got to thinking. If your 383 is a fresh rebuild (5 years ago) and it hasn't been run enough to break it in, you may end up rebuilding it anyway. How has the 383 been stored? If it is all apart and just needs assembled, I say assemble it and go with the 383 (don't forget all the Big Block truck specific stuff). If the 383 has been sitting "assembled and complete" then you may be better off just rebuilding your 360. There is a good chance that any fresh engine that is assembled and sits "unbroken in" for more than a few months may end up with break-in problems due to all those fresh parts just sitting in the same spot. Regardless, when you finally find something to put your 383 in (your truck or otherwise..) take the above into consideration. It may save you a bunch of headaches.
Just my $.02


Mike (440trk)
post #7 of (permalink) Old 10-30-1999, 11:28 PM
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Re: Hey GT your thoughts 360 vs 383?

I'd appreciate it if you two would share that info with me on building the 360. I agree staying with the 360 is best in view of all the other changes it would take to put in the 383. My question is, "Is it better to build an old 360 with that &()*&%*&)*) carburetor, or go get a 92 or whatever with fuel injection and put it in, overdrive transmission, 241 transfer case and all. Whattaythink about that? Ross

post #8 of (permalink) Old 10-30-1999, 11:47 PM
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Re: Hey GT your thoughts 360 vs 383?

I'm interested in what cam, etc. you used for the 360. It seems only Hughes and Mopar offer a cam built especially for the Dodge. All other cams are exactly what they put in Chevies, as far as I can tell. What's your advice on that? Ross

post #9 of (permalink) Old 10-31-1999, 12:17 PM
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Re: Hey GT your thoughts 360 vs 383?

If you've got the cash to pull it off, go with the newer engine. Fuel Injection has some definite advantages, not the least is its performance at nasty angles or during heavy bouncing.

- AJS

post #10 of (permalink) Old 10-31-1999, 11:51 PM
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Re: Hey GT your thoughts 360 vs 383?

from all the posts I have seen it appears that some folks need a course in automotive engineering.while it is believed that
"more cubes=more power" this is not always true.trucks need torque. to get higher torque you need a long stroke and
a short rod. The 360's I build now use a 3.900 stroke and with a 4.030 bore that gives you 403.92 cubic in .The last one I
had on the dyno made 411 foot pounds of torque @ 2850 rpm, using 7.5-1 compression while yielding 185 lbs of cylinder
pressure.IT IS TORQUE NOT HP THAT MOVES TRUCKS . How do you think we moved D600 to 800 series medium duty
trucks with 318's in the 1970's that had GVW's of 19 to 29,000 lbs.? we built the engines to make torque..There is one drawback
to the LA series 360 however, you can make the power thats no problem but the rod bearings take the brunt of the the load
the higher the gvw the faster the rod bearings wear ,I would not put the engine I mentioned above in a 25,000 lb gvw truck
the rod bearings would be shot in 20,000 miles.in this case I would go to a b/rb large block for the larger bearings.For those of you
who still don't believe and feel you must put a "BIG BLOCK" in your pickup that you will play hell getting the rest of the parts for
to install.Try a 400 using a 440 crank keeping the 400 rods keep the comp. ratio down 8 to 1 with no more than 160 lbs of
cyl. pressure for 93 oct. pump gas.The 400 has a bore .020 larger than the 440, the 383/400 has a stroke of 3.375 while
the 413/440 has a 3.750 stroke.To get the 440 crank into the 400 block you will have to get the crank grinder to turn down
the larger main bearings to match the 400 ,the rods are the same.As for cam use the 383 magnum cam from the late 60's
crane makes this today its called the "383 blueprinted" cam set it advanced 6 to 10 degrees.and keep your GVW 10,000 lbs
or less.opinions are open for argument however math and physics are not they are constant...///GT

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