Re: RPM Redline for stock 383/4bbl
[Re: GwaiiEagle]
#441326
08/19/09 11:43 PM
08/19/09 11:43 PM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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I spin my stock bottom 383 to 6400. no issues. 383's are pretty stout. remember that they have a forged crank and the same webbing / oiling / architecture as 440's and Hemi's, only with a smaller 3.38" stroke that does not tax this hardware nearly as hard as the RB's 3.75 stroke. I've always felt that the 383 was about as durable a workhorse as ever came out of an American auto maker.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: RPM Redline for stock 383/4bbl
[Re: StealthWedge67]
#441327
08/20/09 12:33 AM
08/20/09 12:33 AM
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Joined: Jan 2005
Posts: 12,424 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,424
Kalispell Mt.
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I saw some guys try to blow up a worn out 383 by putting a brick on the gas pedal trans in neutral, well it reved to 6000 for about 10 minutes and just sort of lost power and died, later when we pulled it apart the only damage we found was where the valves had nicked the pistons and slightly bent the valves just enough it would not run.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: RPM Redline for stock 383/4bbl
[Re: StealthWedge67]
#441329
08/20/09 11:37 AM
08/20/09 11:37 AM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
I spin my stock bottom 383 to 6400. no issues. 383's are pretty stout. remember that they have a forged crank and the same webbing / oiling / architecture as 440's and Hemi's, only with a smaller 3.38" stroke that does not tax this hardware nearly as hard as the RB's 3.75 stroke. I've always felt that the 383 was about as durable a workhorse as ever came out of an American auto maker.
It in't the bottom that will usually go. So what if they will spin 6000 or better not real likely with stock valve train that the valves will start to float on or the points distributor where the points will start to bounce. Even if you do get one that will spin that far what is the purpose. Bragging rights??? It is long done making power. Heck one of the first things we did with the magnums when new was to up grade the valve train to get rid of some of the float potential (we didn't like eyebrowed pistons or bent valves) and rework the distributor some.
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Re: RPM Redline for stock 383/4bbl
[Re: Real-Fury]
#441332
08/20/09 03:00 PM
08/20/09 03:00 PM
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Joined: Nov 2004
Posts: 2,825 Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Don't compare a BBD to a sbc..Its like an apple to a steaming pile of cow dung Anyways..... The bottom end is good, forged crank, rods, and tough cast pistons. The old recommendation is not too much over 6500 or the pistons may seperate. (I don't know if I buy that, never seen or heard of a 383 or 440 piston that split..) Theres no point in worrying about heads if you have the stock cam. I would use either the 915's, 516(w/big valve) or 906s. The stock valve train should be good, unless you get wilder with the cam. Personally ,I like bigger cams, torque gets you going, but its always more fun at the topend when your horsepower kicks in and you drive by the putz in the 440 car that was just bragging about how much torque he makes...All you need is good gears and convertor
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Re: RPM Redline for stock 383/4bbl
[Re: dynorad]
#441334
08/20/09 04:03 PM
08/20/09 04:03 PM
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Joined: Nov 2006
Posts: 2,260 IL
furious70
top fuel
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top fuel
Joined: Nov 2006
Posts: 2,260
IL
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If it turns out you need to do any amount of work to the heads other than put new springs in, you should probably just buy other heads. As was said, the early, small valve heads aren't really worth putting money into.
I would agree, the article ends up with more cam than you'd want, but the engine was making 400hp/430tq with the stock cam and all the other bolt ons.
70 Sport Fury 68 Charger 69 Coronet 72 RR
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Re: RPM Redline for stock 383/4bbl
[Re: furious70]
#441336
08/21/09 02:36 PM
08/21/09 02:36 PM
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Joined: May 2009
Posts: 130 Blanchard, OK
Real-Fury
OP
member
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OP
member
Joined: May 2009
Posts: 130
Blanchard, OK
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Thanks again everybody. Yep, 400 horses without touching the cam is very respectable.....plenty of HP for me (at least now) and it sound like most of what I bolt on now can remain if I add the right cam and heads later. Butch
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