Posted By: Cuda67
Problems with Stealth 440 source heads. - 04/22/09 12:50 PM
Heard that they have alot of problems. (Can't find head gaskets that fit, need to shim rocker shafts, and poor casting. Made in china.) Sounds like buy cheap get cheap? Which is better open chamber or closed? Which cast iron head is better to over? Should I forget cast and go to Aluminum? 67 383 with 484/284 and 10.5 trw pistons. I'm new to this.
Thanks for any help.
10.0-1
Posted By: JohnRR
Re: Problems with Stealth 440 source heads. - 04/22/09 12:59 PM
What exact piston do you have as there is no such thing as a 10.5 trw piston for a 383 .
also you want closed chamber heads .
all the negatives about the stealths are just unfounded internet rumors .
Posted By: hemisurfer
Re: Problems with Stealth 440 source heads. - 04/22/09 01:11 PM
My Stealth heads are awesome, needed no more work than a set of Eddy's would. Solid lifter Comp Cam and despite what you read I was able to use the 440 Source springs, just had an inner damper added for 50 bucks .
Had them ported by Modern Cylinder and they now outflow many race heads, and they look stock something no other aluminum head can claim.
Do some homework they are great heads.
Posted By: plumridiculous
Re: Problems with Stealth 440 source heads. - 04/22/09 02:00 PM
I was very happy with the stealth heads i bought they fit perfect, better the the stock iron heads i was running. I do want to upgrade the springs and do some porting next time i have them off. I painted them right along with the block and they look like stockers. I bought them only becouse my machinist was taking to long on my iron heads.
Posted By: hemisurfer
Re: Problems with Stealth 440 source heads. - 04/22/09 04:15 PM
correct I was running a 383 that if I remember right was .010 or .020 in the hole and with a 79.5cc chamber (NHRA stocker spec) it was a little over 10.1 with stock pistons/rods. Head gasket was .035 or .030 compressed.
Posted By: Cuda67
Re: Problems with Stealth 440 source heads. - 04/22/09 07:27 PM
I didn't build the engine. The person I bought it from told me it was a 10-1 engine. I'm just trying to wake it up a little. I believe it is at least 10-1 because of the sound of it. Another friend told me ( he helped with the carb.) that he thought it was higher also. I won't know till I take it apart. I have messed with mopars along time ago (1960's) so I have some basic knowledge. Been away a long time.
Posted By: RapidRobert
Re: Problems with Stealth 440 source heads. - 04/22/09 07:33 PM
If it's running now I'd do a compression check that'd give you something for a baseline, if not measure your deck height when you open it up so with the new heads you can plug it all into
http://kb-silvolite.com/calc.php? to get your actual CR
Posted By: hemisurfer
Re: Problems with Stealth 440 source heads. - 04/22/09 09:11 PM
not a typo it was a true 10-1 down in the hole .010,.020 with 79.5cc chambers NOT ABOVE THE DECK.From the factory chambers were 88cc, closer to 8.2-1 even though advertised at 10.5-1. This was a 70 date coded HP 383 Motor.
Posted By: 451Mopar
Re: Problems with Stealth 440 source heads. - 04/23/09 04:33 AM
Do a search here and you will find more info on the heads. I posted some pictures of mine and they are nice castings. The standard Fel-Pro head gaskets that are in the engine gasket "kit" work fine, but are thicker than the fel=pro race head gasket which also has a slightly smaller bore diameter. The springs / locks / retainers that came on mine seem decent for most hydraulic cams with aroud 0.500" lift or less.
The Engine for these are not built yet, but I have two friends running the stealth heads with no problems.
. They are a good buy & you'd take them to your machinist to be checked over just like every(mass produced) part should be checked before you use it.
