Stealth heads on a stocker
- Thread starter 69 R/T
- Start date
moper
Well-Known Member
906 chambers can vary. I've never seen them smaller than 88ccs. Stealths come with smaller closed chambers - 84ccs. They can bolt on out of the box - but if you want to really get the most from them, have a competant performance shop correct the valve job and replace the springs, retainers, and locks. Once that's done (use parts to match your cam choice) bolt them on and go. For a camshaft anything in the 220-225° @ .050 range is fine. Plan to degree the cam and replace the timing set too.
Jackpot50
Well-Known Member
Stealth heads 88cc good pistons just a little under 10:1 just were you want to be for 93 octane.
If you have much lift change over to 10 degree retainers 8 degree good to 550 lift cheap insurance.
If you have much lift change over to 10 degree retainers 8 degree good to 550 lift cheap insurance.
texas69bee
Well-Known Member
Your wrong about having to shave the intake at 20 thousands. These were made oversized to begin with. If you compare a 440sourcehead depth to a stock head... measurement taken from the area where the rocker arm shaft rest to the bottom of the head, there is about a .030 difference. The 440 head being the thicker of the two. I have these heads and mine CC'd at 83. .035 taken off to get to 75CC's. No problem with intake fit unless you use paper gaskets.
I hate to open up this can of worm's but I can't resist. Where is your phone and TV made? Probably next to the factory that makes these heads.
IQ52... These were actually CC'd by a guy that does nothing but work on heads for a living.
I hate to open up this can of worm's but I can't resist. Where is your phone and TV made? Probably next to the factory that makes these heads.
IQ52... These were actually CC'd by a guy that does nothing but work on heads for a living.
cwhubb
Well-Known Member
you cant have too much air flow with a 440 put them on
HT413
Semi Pro Bowler
I need to modify my response. Given you intend on keeping the factory iron intake and exhaust manifolds, perhaps the Stealths are a waste of money. Also, I wonder if that cam is really suited to factory exhaust manifolds.
bigmanjbmopar
Newb with a view
Nailed it,
why use these heads without the other stuff? intake headers etc? that would truly be a waste of money. at least as far as seeing the full benefit.
roadrunner69440
Well-Known Member
Great thread but I still need more info or opinions , I was thinking about using 440 source , 500" kit and stealth heads on my 440 , would also like to go six pack ,,,, looking for 500-550 hp
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Sorry RT , I didn't mean to highjack your thread
- - - Updated - - -
Sorry RT , I didn't mean to highjack your thread
71airgrabberRR
Well-Known Member
Sorry guys, I just went back and re-read the first post. I was under the impression that he already had the heads. Apparently he does not. I missed that the first time.
Stealth heads are expensive, but right now 440 source has them listed for sale at $499 each for a complete head. By the time you factor in the cost of freshening up a set of 906's and installing hardened valve seats so they can survive on today's crap gas, it's not all that far off, plus you get better flow right out of the box. Granted big flow isn't needed at lower RPM's or with a low lift cam, but an engine is basically an air pump. More air in equals more air out. (if other things are matched accordingly)
Here is a link to their web site with the sale:
http://store.440source.com/Stealth-Aluminum-Cylinder-Head-COMPLETE-SINGLE-HEAD/productinfo/200-1055/
I'm not a big fan of Chinese crap either, but at this price they are very hard to beat which is very sad.
As far as the cylinder CC's they are advertised as 80 CC's plus or minus 5 % from cylinder to cylinder due to core shift and "other" production techniques.
Listen to IQ52 as he has a LOT of experience here. Years ago in the late 80's and early 90's I was also an automotive machinist and I specialized in cylinder heads and engine assembly. I've been out of the scene for a long while, but the principles are still similar.
Stealth heads are expensive, but right now 440 source has them listed for sale at $499 each for a complete head. By the time you factor in the cost of freshening up a set of 906's and installing hardened valve seats so they can survive on today's crap gas, it's not all that far off, plus you get better flow right out of the box. Granted big flow isn't needed at lower RPM's or with a low lift cam, but an engine is basically an air pump. More air in equals more air out. (if other things are matched accordingly)
Here is a link to their web site with the sale:
http://store.440source.com/Stealth-Aluminum-Cylinder-Head-COMPLETE-SINGLE-HEAD/productinfo/200-1055/
I'm not a big fan of Chinese crap either, but at this price they are very hard to beat which is very sad.
As far as the cylinder CC's they are advertised as 80 CC's plus or minus 5 % from cylinder to cylinder due to core shift and "other" production techniques.
Listen to IQ52 as he has a LOT of experience here. Years ago in the late 80's and early 90's I was also an automotive machinist and I specialized in cylinder heads and engine assembly. I've been out of the scene for a long while, but the principles are still similar.
dieseldazzle
Well-Known Member
Never did it myself but Mopars Engines West did the last set I put on my buddies 451 and they were 82-83 cc they were cast in 2009.
I also had the flow sheets out of the box and after angie ported them.
There was also a nasty lip on the backside of the valve seat cant remember which one exhaust or intake seat but she fixed it all up and they ran pretty good with the 285 cam
lewtot184
Well-Known Member
last info i had was that the intake valve/seat/pocket area has the lip/flaw and causes the poor low lift flow numbers. it is repairable.
69 R/T
Well-Known Member
Wow, guys. You're all more than welcome to chime in, comment, hijack or what ever. I've been out of this game so long that I welcome, listen to and respect all opinions. I'm thinking if I do anything it's leave it alone or drop in that Summit 6401 cam as lewto184 suggested. My engine is fairly fresh, but I bought it that way in the car, and yes, it's numbers matching incase you're wondering. lol. Can I use factory valve springs with that Summit cam? If not I'll buy the Comp 911's and try to swap them in car with the Lisle 36050 tool. Any thoughts?
mentor70
Well-Known Member
i will give as much imput as i can tomorrow on my recently worked Stealth heads.
many will knock the point of origin, but my machinist specialies in Jap. imports, but is old school domestic and heart, says the MANY replacement heads he sells come from the same foundries as the Stealth heads and they are real good for the money, i purchased mine bare in November of last year for 450$ each, then took advantage of the Hughes engines 50% off CNC porting special they offered last year, i dropped them off at my local guy last week for a close inspection and final decking and prep. all in all, i think you should always optimize the air pump.
many will knock the point of origin, but my machinist specialies in Jap. imports, but is old school domestic and heart, says the MANY replacement heads he sells come from the same foundries as the Stealth heads and they are real good for the money, i purchased mine bare in November of last year for 450$ each, then took advantage of the Hughes engines 50% off CNC porting special they offered last year, i dropped them off at my local guy last week for a close inspection and final decking and prep. all in all, i think you should always optimize the air pump.
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lewtot184
Well-Known Member
i use crane 99839 springs with stock retainers and shim the springs to around 100lbs seat pressure with the 6401 cam. i don't use the summit tappets because i don't know who makes them. this cam has 10 degrees more duration at .050" lift and .200" lift than a stock magnum cam with a little more lift. it's ground on 114lsa with 2 degrees advance and doesn't need any special ignition changes, torque converters, etc. it would be nice to use with a set of 1.6 rockers for a little enhancement, but retainer to seal clearance would need to checked.
knowing the things i know now, vs a few yrs back, and doing a near stock build i'd probably go with a set of hugh's pro-pocket heads. the have decent low lift flow' cost about the same as stealths.
this is were i hope to go with my 69 r/t in the near future. i want to build a cast iron exhaust manifold engine (take out the numbers matching engine) that needs no extra gadgets, idles smooth, pump gas, no low gears, no stupid torque converter crap; just turn the key & drive and have 425+ horsepower-500+ftlbs of torque. this is how i'm going to get there. i'm going to use kb184 pistons for good quench with pump gas, a set of '452 heads with a hugh's stage 1 port job, 6-pak, probably a summit 6401 cam with 1.6 rockers. at one time i had the stock engine at around 400-410hp with a similar build minus good heads. the ported '452's should add 30hp. this should be very reliable, no excessive rpm fun driver.
knowing the things i know now, vs a few yrs back, and doing a near stock build i'd probably go with a set of hugh's pro-pocket heads. the have decent low lift flow' cost about the same as stealths.
this is were i hope to go with my 69 r/t in the near future. i want to build a cast iron exhaust manifold engine (take out the numbers matching engine) that needs no extra gadgets, idles smooth, pump gas, no low gears, no stupid torque converter crap; just turn the key & drive and have 425+ horsepower-500+ftlbs of torque. this is how i'm going to get there. i'm going to use kb184 pistons for good quench with pump gas, a set of '452 heads with a hugh's stage 1 port job, 6-pak, probably a summit 6401 cam with 1.6 rockers. at one time i had the stock engine at around 400-410hp with a similar build minus good heads. the ported '452's should add 30hp. this should be very reliable, no excessive rpm fun driver.
moper
Well-Known Member
2. First set was around 2009 and it followed a valve job not done by my shop. I'd have to check my notes but IIRC it was around 83. Last set was last year this time and IIRC it was 84. Those came from another shop and may have been on the shelf for a while. I got them totally disassembled. Those notes I still have on my dresser - I'll check tonight - I might be off but I seem to recall they were bigger than what was advertised.
lewtot184
Well-Known Member
just for information purpose; i bought a set of rpms last spring, measured 81-82cc's.
texas69bee
Well-Known Member
Your cam selection is similar to compcams XE268H. They say factory springs cannot be used. May require machine work for OD of new springs.
Jackpot50
Well-Known Member
well we measured my set of stealth heads and 88CC right there you could cut them because you can barely get the intake bolts in the heads. cutting them .035 would be no problem.
62 Dart Convertible
Well-Known Member
Whoa, put the alfoil helmet back on now mate to stop the aliens reading your thoughts too. Fair enough if you don't want Chinese products on your Mopar, but your rant is as much paranoia as just plain 'ol racist and offensive...
If stealths weren't great value for money, nobody would consider using them as a better value alternative to rebuilding iron heads, and not everybody wants or can afford 800HP.....
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