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Thread: Stock Cam Specs?
01-24-2012, 12:16 PM #1
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:
Lobe Lift: .235"
Centerline (Park / Max): 139 / 89
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?-2012 Mustang GT Performance White -
RTR Wheels w/ Bfg kdw2's on rears
Boss Intake & JLT CAI
Borla S-type catback with o/r x pipe
-1997 F150 maroon 150db+ single cab on 23s-
3/4 drop, CAI, original flowmaster 40 si/do no cats
01-24-2012, 12:19 PM #2
Those are the specs I posted in a few places...
01-24-2012, 12:25 PM #3
01-24-2012, 12:41 PM #4
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.
01-24-2012, 01:00 PM #5
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 01:07 PM.
01-24-2012, 01:17 PM #6
- Join Date
- November 2003
- tampa fl
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'.
01-24-2012, 01:35 PM #7
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.
01-24-2012, 03:05 PM #8
A lot of great info thanks shaun!
01-24-2012, 04:43 PM #9
Does anyone know why we can't use TiVCT if we go with large valve springs or huge cams in general?
01-24-2012, 05:04 PM #10
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.
01-26-2012, 06:20 PM #11
So what is the center line on the cams??
01-26-2012, 06:45 PM #12
01-26-2012, 11:11 PM #13
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; 01-26-2012 at 11:31 PM.Premium GT, 6M, Sterling Gray Metallic, Black Interior, 3.31's, Security & Convience Pkgs, C&L CAI, JLT Oil/Air Sep, Lund Tune, Flowmaster Hushpower Catback, MGW Shifter, Brake Cooling Ducts, Boss Oil Cooler, FRPP 1.5" Lowering Springs, Koni Yellows, Strano Adj F&R Bars, Fays2 Watts Link, Steeda Street CC Plates, X11 Ball Joints, & Bump Steer Kit, BMR Adj DOM UCA & Mount, Adj Poly/Del-Sphere LCA's & Relocation Brackets, TSW Nurburgring 19x9.5/20x10
01-28-2012, 01:15 AM #14
04-02-2013, 08:02 AM #15
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
Intake: Lift - 12MM (0.472"), Duration - 260 degrees
Exhaust: Lift - 11MM (0.433"), Duration - 263 degrees
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
Intake: Lift - 0.492", Duration - 260 degrees
Exhaust: Lift - 0.453", Duration - 267 degrees
Intake: Lift - 0.492", Duration - 268 degrees
Exhaust: Lift - 0.453", Duration - 275 degrees
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.