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  1. #1
    Crazy SVT Poster Strpperpolef150's Avatar
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    Stock Cam Specs?

    Does anyone know the stock cam specs? I've been curious as to what they were and have heard our engines came with big cams that are toned down at idle by the tivct but then I found this:

    Stock Mustang GT 5.0 Coyote Cam specs:

    Intake Cam:
    Advertised: 263
    .050": 211
    Lobe Lift: .235"
    Centerline (Park / Max): 139 / 89

    Exhaust Cam:
    Advertised: 263
    .050": 211
    Lobe lift: .216
    Centerline (Park / Max): 123 / 73

    Valve events @ Park (no adv/ret) @.050":
    IVO: 33.5 ATDC
    IVC: 64.5 ABDC
    EVO: 48.5 BBDC
    EVC: 17.5 BTDC

    Total overlap (Park) @.050: -51

    Valve events @ Max @.050:
    IVO: 16.5 BTDC
    IVC: 14.5 ABDC
    EVO: 1.5 ABDC
    EVC: 32.5 ATDC

    Total overlap (Max) @.050: 49

    Are those the correct specs?
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  2. #2
    Authorized Vendor Shaun@AED's Avatar
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    Yes.
    Those are the specs I posted in a few places...

  3. #3
    Crazy SVT Poster Strpperpolef150's Avatar
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    Quote Originally Posted by 93PONY View Post
    Yes.
    Those are the specs I posted in a few places...
    Ok thanks. So the cam tune has more to do with tivct settings than the actual cam? I'm not that well knowledged with cams but those specs don't look all that big

  4. #4
    Authorized Vendor Shaun@AED's Avatar
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    Yes.
    Advance the Intake cam and retard the exhaust cam...a LOT. LOL
    I move the cams a total of 55 degrees from stock idle settings.

  5. #5
    Authorized Vendor Shaun@AED's Avatar
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    It works the other way too.
    We can take huge cams and make them purr like a kitten and drive smooth... Key is not locking out the phasers, yet staying away from piston to valve contact.
    Last edited by Shaun@AED; 01-24-2012 at 02:07 PM.

  6. #6
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    Yes the stock cams are very tame, just look at the valve events. I laughed when I read the guy posting up that the stock cams are so big and that the cam tune is how they really would idle and that the vvt is making them run smooth.... Hahaha. You have to move the stock cams 50 degrees towards each other to make them 'cam out'.

  7. #7
    Authorized Vendor Shaun@AED's Avatar
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    Quote Originally Posted by cbrtrx View Post
    Yes the stock cams are very tame, just look at the valve events. I laughed when I read the guy posting up that the stock cams are so big and that the cam tune is how they really would idle and that the vvt is making them run smooth.... Hahaha. You have to move the stock cams 50 degrees towards each other to make them 'cam out'.
    Conversely I could tune a 236/236 coyote camshaft to NOT lope at idle.

    Stock 5.0 Pushrod cams have similar duration on a wide 115 LSA and have -20 degrees of overlap. By comparison the coyote idles at -51 degrees overlap.

    TiVCT was intended to lower emissions and gain in fuel economy while allowing the use of large camshafts for power production.

    The TiVCT 5.0's have Larger camshafts than ever used on a mass produced Modular 4V.

  8. #8
    Crazy SVT Poster Strpperpolef150's Avatar
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    A lot of great info thanks shaun!

  9. #9
    Crazy SVT Poster twistedneck's Avatar
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    Does anyone know why we can't use TiVCT if we go with large valve springs or huge cams in general?

  10. #10
    Authorized Vendor Shaun@AED's Avatar
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    Quote Originally Posted by twistedneck View Post
    Does anyone know why we can't use TiVCT if we go with large valve springs or huge cams in general?
    Valvesprings shouldn't be a big deal.
    Huge cams presents an issue with Piston to Valve and valve on valve contact during the overlap phase. Care must be taken. Ideally piston to valve is measured, then phase limiters built to ensure the ECU can not command TiVCT settings that will result in P2V issues (factory limit is 50 degrees due to P2V). Then valve to valve contact should be measured and Overlap limits set in the Tune. (factory tune limits overlap in TiVCT tables)

    Very complicated and most will not go that far, so the aftermarket makes phase limiters (limits to 20 degrees vs 50) and lockouts to completely eliminate TiVCT.

    I'd like to see mild cams that allow full TiVCT movement and limiters in 5 degree increments (45, 40, 35, 30, etc). There's no need to limit small profiless to 20 degrees, and larger profiles can be set on different 'Park' angles to allow greater than 20 degrees movment without issues as well.

  11. #11
    Crazy SVT Poster WHITEMACH's Avatar
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    So what is the center line on the cams??

  12. #12
    Authorized Vendor Shaun@AED's Avatar
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    Quote Originally Posted by WHITEMACH View Post
    So what is the center line on the cams??
    It changes..... That's the variable part of TiVCT.
    ICL and ECL change independently (the 'i' part of it) LOL

    Park centerlines and Max centerlines are posted.

  13. #13
    V8/RWD Fanatic GabeMarlin's Avatar
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    Not to steal your thread but this is kind of in the same vein. Does anyone know the rocker ratio of our 5.0's? I read somewhere that the new gt500s are going to have 1.8:1's.
    Last edited by GabeMarlin; 01-27-2012 at 12:31 AM.
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  14. #14
    Crazy SVT Poster twistedneck's Avatar
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    Quote Originally Posted by Shaun@AED View Post
    Valvesprings shouldn't be a big deal.
    Huge cams presents an issue with Piston to Valve and valve on valve contact during the overlap phase. Care must be taken. Ideally piston to valve is measured, then phase limiters built to ensure the ECU can not command TiVCT settings that will result in P2V issues (factory limit is 50 degrees due to P2V). Then valve to valve contact should be measured and Overlap limits set in the Tune. (factory tune limits overlap in TiVCT tables)

    Very complicated and most will not go that far, so the aftermarket makes phase limiters (limits to 20 degrees vs 50) and lockouts to completely eliminate TiVCT.

    I'd like to see mild cams that allow full TiVCT movement and limiters in 5 degree increments (45, 40, 35, 30, etc). There's no need to limit small profiless to 20 degrees, and larger profiles can be set on different 'Park' angles to allow greater than 20 degrees movment without issues as well.
    So its only piston to valve clearance and not delay of the tivct adjustment and / or issues with valve spring force causing a delay or reduction in the movement of the tivct? if its clearance only thats a really good thing.

  15. #15
    Crazy SVT Poster Yagermeister's Avatar
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    Quote Originally Posted by Strpperpolef150 View Post
    Does anyone know the stock cam specs? I've been curious as to what they were and have heard our engines came with big cams that are toned down at idle by the tivct but then I found this:

    Stock Mustang GT 5.0 Coyote Cam specs:

    Intake Cam:
    Advertised: 263
    .050": 211
    Lobe Lift: .235"
    Centerline (Park / Max): 139 / 89

    Exhaust Cam:
    Advertised: 263
    .050": 211
    Lobe lift: .216
    Centerline (Park / Max): 123 / 73

    Valve events @ Park (no adv/ret) @.050":
    IVO: 33.5 ATDC
    IVC: 64.5 ABDC
    EVO: 48.5 BBDC
    EVC: 17.5 BTDC

    Total overlap (Park) @.050: -51

    Valve events @ Max @.050:
    IVO: 16.5 BTDC
    IVC: 14.5 ABDC
    EVO: 1.5 ABDC
    EVC: 32.5 ATDC

    Total overlap (Max) @.050: 49

    Are those the correct specs?

    In the Ford Racing catalog for the Boss cams they mention the GT cams have only 12mm INT and 11mm EXH of lift and 260 duration on the INT. Is the GT cam intake 260 or 263? Where do the lift numbers come in to the previously provided numbers? Regarding the Boss and Cobra Jet cams, are all the numbers the same except for what is noted?

    Noted on the Boss INT cams: 13MM Lift / 263 degree duration vs. 12mm lift and 260 degree duration on Mustang GT 5.0L engine

    Noted on the Boss EXH cams: 13MM Lift / 290 degree duration vs. 11mm lift and 263 degree duration on Mustang GT 5.0L engine

    Noted on the "mini" Cobra Jet EXH cams: 11mm lift / 290 degree duration vs. 11mm lift and 263 duration on Mustang GT 5.0L engine



    Found this in another thread somewhere on Mustang Source:

    Stock cam specs

    GT
    Intake: Lift - 12MM (0.472"), Duration - 260 degrees
    Exhaust: Lift - 11MM (0.433"), Duration - 263 degrees

    Boss
    Intake: Lift - 12MM (0.472"), Duration - 260 degrees [Same as GT]
    Exhaust: Lift - 13MM (0.512"), Duration - 263 degrees

    Cobra Jet cam specs

    M-6550-M50BINT (the originally planned Boss intake cam that didn't make it into production, it's used in the CJ)
    Lift - 13MM (0.512"), Duration - 263 degrees

    M-6550-M50BEXH (the CJ exhaust cam)
    Lift - 13MM (0.512"), Duration - 290 degrees


    Comp Cams aftermarket cams

    Stage I
    Intake: Lift - 0.492", Duration - 260 degrees
    Exhaust: Lift - 0.453", Duration - 267 degrees

    Stage II
    Intake: Lift - 0.492", Duration - 268 degrees
    Exhaust: Lift - 0.453", Duration - 275 degrees

    Stage III
    Intake: Lift - 0.492", Duration - 276 degrees
    Exhaust: Lift - 0.453", Duration - 283 degrees

    All the Comp Cams cams require phase limiters that restrict the Ti-VCT movement to 20 degrees. The Ford Racing Cobra Jet cams do not.

    2010 GT500

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