Re: building a 383.. is 440 source the place to go?
[Re: coronet1966d]
#451457
08/27/09 02:57 AM
08/27/09 02:57 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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The stealth heads I got were really nice castings. The springs and retainers are good for a decent sized hydraulic cam, but may need to be changed if using a large cam. The only item to note with the heads, is to use a large bore head gasket. Their timming chain sets are nice too. My machine shop re-ballanced one of their stroker kits, but I did not get the details why they did it? I will pay closer attention to ballancing issues on the other kit I have. I did get a timing chain oil slinger, and the crank hole was too small to fit over the crank snout. Their windage trays are designed to clear a 4.5" stroker crank, so they are too large (deep) to fit inside a stock style oil pan. The aluminum rear oil seal retainer was slightly shorter than my oil pan rails, not a problem and maybe the same height as the stock seal retainer? I did not check the height of the stock one for comparison? The ARP oil pump bolt kit for the HV oil pump are too long and bottom out before clamping the oil pump to the block. I few minutes with the grinder fixed that problem. 440 source customer service was good, and I would buy from them again. Those new cast valve covers look nice
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Re: building a 383.. is 440 source the place to go?
[Re: 451Mopar]
#451458
08/27/09 07:49 AM
08/27/09 07:49 AM
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Joined: Jan 2003
Posts: 21,073 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,073
Niles , Ohio
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I believe they fixed the chamber problem.Mine were one of the first sets.I used FelPro marine head gaskets and they fit perfect.Been on 2 years and no problems.I did have mine upgraded to Comp springs retainers and keepers for the big solid cam I run.That and they back cut the valves cleaned them up a bit and lapped the valves.That would have been done on any head except maybe a full ported set.Have them checked before you install them.Its cheap insurance.Rocky
Chrysler Firepower
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Re: building a 383.. is 440 source the place to go?
[Re: 1_WILD_RT]
#451460
08/27/09 08:52 AM
08/27/09 08:52 AM
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Joined: Jan 2003
Posts: 75,017 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,017
U.S.S.A.
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Quote:
Is there some reason your going 383 vs 440? Or at least 400?? The 383 while they can run good have some real disadvantages... Like the fact it's hard to get a decent C/R piston...
The problem is the small bore and short stroke when it comes to getting compression , there are ways to get around it , but it's not cheap , NOTHING off the shelf .
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Re: building a 383.. is 440 source the place to go?
[Re: coronet1966d]
#451466
08/27/09 12:22 PM
08/27/09 12:22 PM
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Joined: Jul 2003
Posts: 4,770 Holland MI Ottawa
2boltmain
master
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master
Joined: Jul 2003
Posts: 4,770
Holland MI Ottawa
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We tend to poo poo the stock displacements because strokers are all the rage (And yes I want a 500" 400B engine too!) But really, a 425hp 383 is easy and affordable with the Stealth heads and a really good cam and valvetrain.
Keep old mopars alive.
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Re: building a 383.. is 440 source the place to go?
[Re: scratchnfotraction]
#451468
08/27/09 12:28 PM
08/27/09 12:28 PM
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Joined: Feb 2006
Posts: 1,949 land of 10,000______'s
BDS871Cuda
top fuel
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top fuel
Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
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Quote:
check the water passages in the alum wp housing
just read a post on that,the passages are smaller and was causing an heat problem
only what I read though,but worth checking
I read about the water pump housing from a couple different users of it. Call 440source and see what they have to say about it.
If you going to run the 383, just run the stock heads on it and toss in a 474 purple cam. Check the Summit cams out, they might have a good TQ cam for a 383. I wouldn't spend money on Stealth heads and big cam for just towing.
Snap your neck, mega G-force launch, is all I want!
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Re: building a 383.. is 440 source the place to go?
[Re: 2boltmain]
#451469
08/27/09 01:40 PM
08/27/09 01:40 PM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
We tend to poo poo the stock displacements because strokers are all the rage (And yes I want a 500" 400B engine too!) But really, a 425hp 383 is easy and affordable with the Stealth heads and a really good cam and valvetrain.
My comments about the 383 have nothing to do with wanting a stroker.. And getting 425Hp out of a 383 is gonna require very good machine work & picking the right combo of parts... A 383 due to it's bore size vs deck height/combustion chamber volume makes it tough to achive a true compression ratio greater than about 9-1 without using a domed piston... If you use aluminum heads & design for quench 10.5 is a safe number to shoot for so leaving 1.5 points on the table effects the power curve and fuel economy considerablely.. The numbers at peak may only be 10% but lower in the curve where most engines run 95% of the time the effect is greater..
400's devoloped a reputation as smog motors, typically as delivered they had a 8.0-1 compression ratio.. But getting a 400 up to 10-1 + is fairly easy & you have the benifit of 17 more cubes...
I just spent a few minutes calulating it out... If you can get the piston set at zero deck height & mill the stealths to 75cc chamber volume your be right at 10.5... It'll take a custom piston & machining the heads but...
Or you can build a 440 with off the shelf pistons, off the shelf Stealth heads obtain quench & a good compression ratio plus 57 more cubic inches..
So the money you saved on your core will be eaten up trying to make the 383 run the way it should...
BTW if your not familar with quench read this..
http://www.kb-silvolite.com/article.php?action=read&A_id=39
or this..
http://racingsecrets.com/article_racing-10.html
I realise the articles are titled as racing oriented but quench is more useful as a street engine concern then a race engine concern.. In a race engine racing fuel isn't a big step.. On a street engine getting the most power out of the available fuel is the key to a good street engine..
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Re: building a 383.. is 440 source the place to go?
[Re: MoparKansas]
#451471
08/27/09 02:09 PM
08/27/09 02:09 PM
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Joined: Jan 2005
Posts: 1,647 IL
71383beep
top fuel
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top fuel
Joined: Jan 2005
Posts: 1,647
IL
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Ahh c'mon 383's aren't bad builds. 425 is not that hard. The key like anything is compression. Just get some closed chamber heads and you'll be fine. If you have a 67 engine you probably allready have them. The 915's are the most desireable while the 516's can make adequate power for 400+ HP. My lowly 383 is runing at 9.2:1 with reworked 516's and a .474 cam with the dreaded kb162's. It dynod at 400/430 hp/tq and has very good street manners. With 3.91 gears and 2600 stall it has got a few 440 notches in her belt. Get some worked on closed chamber heads, if you gotta use KB pistons I would use the KB400's, a decent cam in the 230/240 @ 0.050" range, RPM intake, 650 Dp or better carb, 3.55 or better gears, headers, and go have some fun. If it works and you want more you can allways stroke it later. The same works for a 400 too. If the guy allready has a 383 then let him build what he has. WHY does every answer gotta be go buy something else...
'73 GK6 Challenger Rallye - 340 4-Speed
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