Stealth Aluminum Cylinder Head

Engine, Trans & Driveline

  1. furryfrog

    furryfrog Well-Known Member

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    http://www.440source.com/headfaq.htm#5

    You can't use factory head bolts with stealth heads.

    Follow the instructions that come with the head bolts you use, specs will be different depending if you use engine oil for lubrication, or arp bolt lube for example if using arp head bolts.

    I will try to find the spec sheet that came with my arp head bolts.
     
  2. mobbi

    mobbi FBBO Gold Member FBBO Gold Member

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    Yeah ok,I do have arp head bolt and I will use them.
     
  3. threewood

    threewood Well-Known Member

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    1546457975631-1716926905.jpg
     
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    • mobbi

      mobbi FBBO Gold Member FBBO Gold Member

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      Great, thanks threewood just what I needed
       
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      • threewood

        threewood Well-Known Member

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        No problem. And for the relief cuts for the pushrods I only had to do the intake pushrod tunnels. But I am using thick wall 5/16". 3/8" may need more.
         
      • Garys1969RR

        Garys1969RR Well-Known Member

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        I've always torqued head bolts ro 70 ft lbs, iron or alum. What head gaskets are you using? I have used the .020 steel shim metal gasket with Copper coat sealant, with no problems. Guy in England used Hylomar on a daily driver RR alum heads, no leaks. Don't know if the Stealths use stock head bolts, or the small head after market bolt. My Eddys needed special bolts due to bolt head clearance issues.
         
      • mobbi

        mobbi FBBO Gold Member FBBO Gold Member

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        Did my Indy 440-1 heads also to 70 ft.lbs way back.
        I have 3 option felpro 1009, FEL-8519PT steel shim .020 or head gasket Edelbrock 7325 have them all
        I will be using FEL-8519PT.
        Do have arp bolts,my understanding is they fit Eddys 440 source heads. (Stealths can not use stock head bolts)
        Have now finnish pushrods clearance issue on both head,next step would be contact Kim at 440Source get new 10degree retainers,locks and teflon valve seal
         
      • threewood

        threewood Well-Known Member

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        Use the headgasket that gives you the best quench. I had to order a set of expensive Cometic gaskets (.030" + .010" in the hole) to get mine to .040"
         
      • mobbi

        mobbi FBBO Gold Member FBBO Gold Member

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        Did put my 383 motor together 2003 and new piston in for .030 bore and they had 2 valve reliefs on each side (speed pro piston black on side?)
        Have lost my measurement for piston to deck depth in hole,but it was way more than .010 my memory fading
         
      • mobbi

        mobbi FBBO Gold Member FBBO Gold Member

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        Well at last had time today to pull my iron 452(2.14 in/1.81 ex) heads off the 383 motor,no valve relief as I thought,bad memory
        Head gasket are .020 steel,and it seem it had a little blowby between cylinder 3 and cylinder 5. Will pull other head tomorrow.
        Piston in the hole did measure .020mm,so think I will be good thing to use FEL-8519PT head gasket with my 440 stealth heads.

        Tell me what you thing
        What I have
        383 motor,street use.
        sixpack
        Camshaft. Lunati Voodoo:60303
        • Advertised Duration (Int/Exh): 268/276
        • Duration @ .050 (Int/Exh): 226/234
        • Gross Valve Lift (Int/Exh): .494/.513
        • LSA/ICL: 110/106
        727 auto with ma mopar 10 3/4 original high stall converter
        Rear end 8 3/4 sure-grip cone type with 3.55-1 ratio.
        Thanks.

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        Last edited: Feb 11, 2019
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        • Garys1969RR

          Garys1969RR Well-Known Member

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          Wow, those white ex valves look strange. Should be more of a light tan to brown. You may be running a tad lean. At least on 3 of them.
           
        • mobbi

          mobbi FBBO Gold Member FBBO Gold Member

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          Yes I did notice that,spark plug 1 and 3 were kind of white color,5 and 7 were black .Car have not been driven this winter,just fired him up now and then
           
        • furryfrog

          furryfrog Well-Known Member

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          From what I have read, the factory original high stall converters are not that high of a stall. Perhaps members with more experience can comment on this. Also counting the fact this cam is going in a 383 not a 440 or a stroker suggests that you may want to change converters or the cam. Looks like a fun cam though, the data sheet recommends a 2400rpm stall, your 3.55 gears are good.

          I had a cam with slightly less specs, (summsummit k6401)224int/234ex, with 3.55, and a 440, 9.28 cr with stealth heads, with a stock converter, and it was just ok, like the data sheet said, any more cam and it would not have been good. It was a dog down low but it helped traction on the street,lol. The converter came with the motor from an RV, whatever that means but it was tightish.

          I think I would take the data sheets advice and go with a converter with a 2400 stall, any idea what your converter stalls at in your car now?
           
        • mobbi

          mobbi FBBO Gold Member FBBO Gold Member

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          Aprox. stall speeds are 2400 on 340, 2600 on 361-383, and 2900-3000 on 413, 426 Wedge and 440’s; stall speeds are dependent on engine torque output.
          This cam has been in the motor for 3 years now,and it has work very fine,with sixpack.My converter stall a least 2600
           
        • mobbi

          mobbi FBBO Gold Member FBBO Gold Member

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          Pull the other head this morning,look better this side at least piston much cleaner,I am sure I had little blow by between cyl.3 and cyl.5.
          Did buy me,Permatex Copper Spray-A-Gasket Hi-Temp Adhesive Sealant
          I have heard good things about spraying steel gasket with this stuff,any advice and suggestions will be greatly appreciated
          Anyway did clean up piston cyl.1 and measure it again how much down in hole it is,.025mm so it seem to be about .010"

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        • mobbi

          mobbi FBBO Gold Member FBBO Gold Member

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          Today I cleaned up deck surface and pistons,I did notice that exhaust valve has been in contact with piston heads mostly on cyl.8 and 6 cyl. other much less.
          So I think I will skip using new .020" steel head gasket with my stealth heads.So next step would be Edelbrock 7325 head gasket wich are .038 compressed.
          Also notice when I replaced new spring,10 degree retainer and locks,valve steam end were much closer to retainer face than on my old iron head.
          Did read about it,and it seems that my 10 degree lock are for valve lash cap,so my question is can I use them or do I have to buy new one with standard height?
          Thanks.

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        • Jackpot50

          Jackpot50 Well-Known Member

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          Have a set with 10,000 on them no problem, but checked them out before putting them on.
          Just because they are new doesn't mean they are right, and that's all of the parts.
           
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          • mobbi

            mobbi FBBO Gold Member FBBO Gold Member

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            But spring seat load, how much chance there?
             
          • mobbi

            mobbi FBBO Gold Member FBBO Gold Member

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          • Bee1971

            Bee1971 Well-Known Member

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            With your valves kissing your pistons you said

            Did you pull your lifters , check your camshaft lobes and pushrods for straight , I would definitely pull those lifters on those cylinders that kissed and recheck and double check

            I would also check valve to piston clearance with those new heads , especially running flat tops with no valve reliefs

            Ask me how I know on that subject when I changed over to E Street Heads last year running the Speed Pro Forged slugs of about twenty years with no valve reliefs about .020 in the hole on my 383 Magnum

            Man I would hate to see you go through all this work and get happy on the RPM s with those new heads and have the kiss of death
             
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