block preferances. why 383 over 400? - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer block preferances. why 383 over 400?

Print Thread

block preferances. why 383 over 400? #1490746 08/25/13 09:40 PM 08/25/13 09:40 PM
Joined: Jun 2013 Posts: 1,521 Tacoma, Washington USA A Adam71Charger OP pro stock
Adam71Charger OP pro stock A Joined: Jun 2013 Posts: 1,521 Tacoma, Washington USA	I was told by guy today on the phone that a built 383 will outrun a 400 any day of the week. Now, this guy was calling about 71 newport that Im selling, I listed it for $1000 and stated that I would be keeping my 400 engine (cause its a 230 cold weather block.) He wants the whole car, and Im guessing he is telling me how much better a 383 can be built than a 400 because he wants my 400. My first thought to his statement was, uh you can make a 340 outrun a 400 if you have enough money.. its all in what you do to it. So, is there some key feature to a 383 that makes them better blocks for high horsepower and stroker combinations? and not for unlimited budget builds, lets say the the budget is $8,000 and you wanted a reliable 650hp street/strip car

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490747 08/25/13 09:44 PM 08/25/13 09:44 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Bigger bore favors the 400. Also stronger main bearing webbing. The 383 can be stroked to make a hi po engine but I can't think of any reason it would be preferred over a 400.

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490748 08/25/13 09:46 PM 08/25/13 09:46 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	Nah: But a stock 68-69 383 Magnum will certainly outrun any stock Mopar, Chev or Ford 400. Sheldon

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490749 08/25/13 09:47 PM 08/25/13 09:47 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: and Im guessing he is telling me how much better a 383 can be built than a 400 because he wants my 400. When I was 12 yrs old the mechanic/radiator repairman across the street told me that "friendship ceases when it comes to money" & I didn't believe him (at the time). live every 24 hour block of time like it's your last day on earth

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490750 08/26/13 12:13 AM 08/26/13 12:13 AM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Bump the price up $1000 then I will drop off a complete one at your house next month for $750 when I go to Seattle. You make more money and do less work He gets his silly numbers matching 400 2bbl And I sell a spare engine sitting around. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: block preferances. why 383 over 400? [Re: HotRodDave] #1490751 08/26/13 12:19 AM 08/26/13 12:19 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	400s are bow wows till you stroke 1.. "Im not talking about petting it.." I am truckless..

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490752 08/26/13 12:26 AM 08/26/13 12:26 AM
Joined: Jan 2003 Posts: 31,041 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,041 Oregon	If everything else is the same then the 400 will make more power. It has more cubic inches and a bigger bore size. The problem is that you never used to be able to get good shelf pistons for the 400 so it was always a dog. But that can be fixed. Everything else is basically the same between the engines.

Re: block preferances. why 383 over 400? [Re: 340SHORTY] #1490753 08/26/13 12:43 AM 08/26/13 12:43 AM
Joined: Mar 2005 Posts: 3,445 N.Wilkesboro,NC D DusterKrazy master
DusterKrazy master D Joined: Mar 2005 Posts: 3,445 N.Wilkesboro,NC	Quote: 400s are bow wows till you stroke 1.. "Im not talking about petting it.." Don't agree at all. All a 400 needs is compression. It has a cylinder bore even larger than the 440. Loves to rev just like the 383. My slightly modified one in my '65 Chrysler moves it very well.

Re: block preferances. why 383 over 400? [Re: DusterKrazy] #1490754 08/26/13 12:51 AM 08/26/13 12:51 AM
Joined: Oct 2005 Posts: 6,048 Back home in PA B BulletBob master
BulletBob master B Joined: Oct 2005 Posts: 6,048 Back home in PA	You give that 400 the same compression,camshaft,intake/carb & heads as the 383 & the 400 with show you that "There's NO Substitute for CUBIC INCHES!"

Re: block preferances. why 383 over 400? [Re: BulletBob] #1490755 08/26/13 10:20 AM 08/26/13 10:20 AM
Joined: Dec 2010 Posts: 409 PEI Canada chromedome426 mopar
chromedome426 mopar Joined: Dec 2010 Posts: 409 PEI Canada	The 400 blocks have become very popular with Bracket Racers with the availability of all the stroker kits out there today. With the low deck height and big bore they make for a very nice big cubic inch, fast revving, long lasting durable engine with a little extra hood clearance and less weight than a 440 block.

Re: block preferances. why 383 over 400? [Re: chromedome426] #1490756 08/26/13 11:04 AM 08/26/13 11:04 AM
A Anonymous Unregistered
Anonymous Unregistered A	Of all the "conventional wisdom" about engines , the Big Bore - Short stroke deal is the truth. It Works! The bigger bore is always, always better. Two of the baddest big block Mopars I have ever seen were 4.500 bore and very short stroke. They made massive power. I likey 400's any day!

Re: block preferances. why 383 over 400? [Re: ] #1490757 08/26/13 02:41 PM 08/26/13 02:41 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	The guy was either dishonest or dumb, take your pick. In my world, 383s are giveaway engines, kind of like 318s. The '68 383 Magnum swap meet engine that didn't sell for $75.00 is an example. 400s are worth more. People are pretty well educated about the advantages. R.

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490758 08/26/13 03:30 PM 08/26/13 03:30 PM
Joined: Aug 2003 Posts: 43,195 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,195 Bend,OR USA	Quote: I was told by guy today on the phone that a built 383 will outrun a 400 any day of the week. Now, this guy was calling about 71 newport that Im selling, I listed it for $1000 and stated that I would be keeping my 400 engine (cause its a 230 cold weather block.) He wants the whole car, and Im guessing he is telling me how much better a 383 can be built than a 400 because he wants my 400. My first thought to his statement was, uh you can make a 340 outrun a 400 if you have enough money.. its all in what you do to it. So, is there some key feature to a 383 that makes them better blocks for high horsepower and stroker combinations? and not for unlimited budget builds, lets say the the budget is $8,000 and you wanted a reliable 650hp street/strip car Is there any smoke coming out of your ears yet He is trying to blow smoke up yuor rear the 400 block is way better than the 383, if they weren't Mopar wouldn't have replaced the 383 with them You should always sonic test any block before committing to building them Last edited by Cab_Burge; 08/27/13 01:38 AM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: block preferances. why 383 over 400? [Re: Adam71Charger] #1490759 08/26/13 06:01 PM 08/26/13 06:01 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Slightly OT but a 400 with a 440 crank is a good plan. I see 440 steel cranks on occaision for $100-125 & this combo (451) or offset grinding the 440 crank (470) yields plenty of cubes & the B block is a better fit in an A body & look what Andy got out of his 470-550 horsepower! Yes he had killer (alum) heads which you're way ahead to go with them anyhow rather than antiquated iron heads but it is simple & easily doable. The biggest expense (besides the heads) is the pistons but you're gonna need them whichever way you go. live every 24 hour block of time like it's your last day on earth

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1