Ok, here's the debate of the century: 383 or 400 chevy!! Cast your vote and reason - Page 14 - Hot Rod Forum : Hotrodders Bulletin Board
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View Poll Results: What's the better motor?
400 SBC 214 45.63%
383 SBC 160 34.12%
Bore your 383, get a 388 22 4.69%
They're equally good street motors 73 15.57%
Voters: 469. You may not vote on this poll

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  #196 (permalink)  
Old 07-13-2005, 11:40 PM
USAF F-16 ELECTRICIAN
 
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my friend is destroking a 400 to get a 377 and he said the reason for that was a higher rev. is this worth the trouble or would it be better to stick with the 400?
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  #197 (permalink)  
Old 07-14-2005, 12:34 AM
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400

OK, Right now I am in the middle of building a 383. It is going to be a 10.5 to 1 engine with a pretty healthy hyd cam (509 533) and (244 254@50). It will have aluminum heads that are (195cc intake runners) and (64cc combustion chambers). So it should run pretty good. But my buddy and I built him a 406 with the same cam and double hump heads with 5.7 rods. We were suprised at how strong that thing was. Now this thing was sitting in a 85 S10 pickup and he went 8.20@87 in the 1/8th,that was on street tires and spinning. That same night I saw him turn that 406 (8000rpms). His tach has recall button on it and when he came back to the pits I hit the button. So a 406 will twist up there if you want it too. I was told a long time ago,by a guy that owned our local speed shop that ( There is no replacement for displacement). So if you have a 400 build it, if you have a 350 (my case) stroke it. 400 wins my vote for power.
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  #198 (permalink)  
Old 07-14-2005, 07:00 AM
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Quote:
Originally Posted by Jcarnut01
OK, Right now I am in the middle of building a 383. It is going to be a 10.5 to 1 engine with a pretty healthy hyd cam (509 533) and (244 254@50). It will have aluminum heads that are (195cc intake runners) and (64cc combustion chambers). So it should run pretty good. But my buddy and I built him a 406 with the same cam and double hump heads with 5.7 rods. We were suprised at how strong that thing was. Now this thing was sitting in a 85 S10 pickup and he went 8.20@87 in the 1/8th,that was on street tires and spinning. That same night I saw him turn that 406 (8000rpms). His tach has recall button on it and when he came back to the pits I hit the button. So a 406 will twist up there if you want it too. I was told a long time ago,by a guy that owned our local speed shop that ( There is no replacement for displacement). So if you have a 400 build it, if you have a 350 (my case) stroke it. 400 wins my vote for power.
Properly Built,Parts matching 400s are amazing to see in action.
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  #199 (permalink)  
Old 07-15-2005, 06:12 PM
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Here is why a 400 is better, because you can build 417s, 420s, 427s and 434s he he he. It has brought a whole new meaning to the term "stroker small block" And once you finish stroking your 400, you can take the original crank from the engine and stroke your 350. Now you have a stroked 400 and a 383. Best of both worlds.
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  #200 (permalink)  
Old 08-01-2005, 07:26 PM
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383 400 vote

Quote:
Originally Posted by killerformula
OK, in the opinion of everybody here, what is the better street motor, a 383 or a 400? Take into account the strength of the motor, availability of parts, reliability and power.

I'm torn, I have a 388 and i guess its nice to have the availability of 350 parts and the better cooling at virtually no sacrifice in power.

What do yall think?

K
mi73cam, well ive never driven a 383 but i like the idea it may be my next build if my 406 lets go. but this cooling thing i here about alot in 400s i drove 20mi. to our strip 7/15/05 it was 94 out made 5 passes the eng. never cooled much and drove back with a 185 stat and didnt see more then 200 on the gauge ever. part wise you cant beat the 350 stuff but for now im going 400 it can really get the job done.
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  #201 (permalink)  
Old 08-01-2005, 08:45 PM
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Let me give a brief history of how I got my SBC 400.
I was in the market to build a 383 and saw a 350 block in the Iwanna Ad so I give the guy a call then heads to his house. I look at the 350 (010) block and for some strange reason something click in my mind to ask the guy do he have a 400. To my surprise he said yes I have one in the back yard as was proceed to the back of the house I ask so what are you asking for the 400. Once again I was surprise he said $50.00 and the block was a virgin that had spun the number 6 bearing. I put that block on my truck and have never looked backed. At times I do feel a little guilty because the shed tree mechanic did not know what he had....
Let's fast forward what has happen: The block was hot tank, pressure tested and sonic test, before investing any money except the $120.00 for the test mention above.
Now she is complete and I was able to break it in on a dyno with over 502 lbs of TQ and 487 hp without any major tuning on the dyno. My vote is for the 400.
Look at my dyno sheets and you will see their is more power in this engine once the timing curve is tweaked and carb is dialed in.
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  #202 (permalink)  
Old 08-04-2005, 08:48 PM
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How about a 455 Buick engine? Thats what I have
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  #203 (permalink)  
Old 08-05-2005, 04:38 PM
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ok since it's still going, how many 400s had 4 barrels ? someone said that most were 2 barrels is this true ?



Mustangsaly
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  #204 (permalink)  
Old 08-05-2005, 04:47 PM
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383 Rules!

383 because I have one!
http://1-4u-computer-graphics.com/jacks-corvette5.htm

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  #205 (permalink)  
Old 08-05-2005, 04:48 PM
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that thing got a HEMI in it
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  #206 (permalink)  
Old 08-21-2005, 06:38 AM
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400 only

My 400 4 bolt short with no obvious core shift cost $450, down here you can't buy a crank and rods for under 800 bux. Cooling? a 4 core and propane for fuel(idiots tell me that causes overheating too) Leaving Cloncurry in out back Queensland with a fishing boat behind on a 118 DEGREE afternoon the temp got all the way up to 190. Spare me, how is the tooth fairy? Just unshroud my valves.
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  #207 (permalink)  
Old 08-21-2005, 12:32 PM
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190 on a 118 deg day, hmmm mine runs hotter than that on a 90 deg day.
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  #208 (permalink)  
Old 08-21-2005, 03:43 PM
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Getting a little hot? I like my 327

For any engine that you build in the time to come. Just think about a block filler. This is what we do before boring, to lessen the possiblity of a crack. And it fills this open space so you can cool the water faster, because you won't have much to cool any more due to small space.

*327w/400 heads=wild little monster (I got one, I know)

350=cheap, on a budget, reliable, standard engine
383= more lb-ft, more horses, good truck engine, Impala engine booster
400=more cubes=more hp, more torque
!make sure its a 4 bolt main before you go over 450 hp!

I like AMC, Ford, and Mopar

I'd take a GM any day of the year

Last edited by LivenInTheFastLane; 08-21-2005 at 03:50 PM.
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  #209 (permalink)  
Old 08-21-2005, 05:03 PM
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this is one of threads that will never die isn't it?


J
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  #210 (permalink)  
Old 08-22-2005, 02:42 AM
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400 cooling.

Hey blazin72, If it run's hot in traffic give it more air, hot on the highway give it more water. I run a standard 4 row rad, stock Holden fan and shroud and a 180 degree thermostat. Use a quality water pump with a cast iron impeller and 30 -40 percent genuine coolant. I'm doing a body off on the car, new heads, intake and rockers etc with 4 corner flow from the intake. Think about Charlotte or Daytona, if they can cool a siamesed bore(bowtie) block at over 9000rpm in summer why can't we?
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