Offshoreonly.com - Can help

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[email protected]

11-10-2019 07:14 PM

Can help

I’m refreshing a 1995 502 efi mag
it needs a cam as it was starting to eat a lobe
im up grading the flat tappet for a hydraulic roller
and may go roller rockers as well
without getting the factory Merc eci re programmed I would like a cam recommendation
boat has the factory captains call exhaust and manifolds
don’t want to change the exhaust either
any help or suggestions appreciated

phragle

11-10-2019 07:33 PM

288*/288* seat
224*/224* @.050"
.483"/.483" valve
115.5* LSA
109* ICL
122* ECL

Griff

11-11-2019 01:31 AM

Quote:

Originally Posted by phragle (Post 4714468)

288*/288* seat
224*/224* @.050"
.483"/.483" valve
115.5* LSA
109* ICL
122* ECL

Which is the stock roller cam in the Gen VI 454/502MPI's

phragle

11-11-2019 06:07 AM

Quote:

Originally Posted by Griff (Post 4714485)

Which is the stock roller cam in the Gen VI 454/502MPI's

Well he doesnt want to tune or change the exhaust....

GLENAMY 242SS

11-11-2019 07:18 AM

I'm pulling mine next month to install a more aggressive cam so I could supply:
Cam - roller stock 200 hrs, springs from same, Rockers Comp Extreme new (less than an hour),
Let me know if any of this works for you.

[email protected]

11-11-2019 01:44 PM

Can you give me some specs on the cam?

GLENAMY 242SS

11-11-2019 02:21 PM

Quote:

Originally Posted by [email protected] (Post 4714545)

Can you give me some specs on the cam?

It is a stock Gen VI Mercruiser roller camshaft with around 200 hours. Coming out of 502 ci 415 HP crate motor. S/N 00064200.
If you go with roller rockers, highly recommended, I have a set of new Comp Cam extreme for sale $ 300

ROLLER TAPPET CAMSHAFTENGINE MODEL
7.4L
454 MAGNUM

502 MAGNUM

8.2L
Lobe Lift + .020 (0.051)
Exhaust
.284 (7.214)
.342 (8.687)
Intake
.282 (7.163)
.342 (8.687)
Duration at .050 In. (1.27 mm)

Cam Lift
Exhaust
209°
227°
Intake
209°
211°
Journal Diameter
1.94282-1.9492 (49.485-49.509)
Journal Out Of Round
.001 (0.025) Maximum
Camshaft Runout
.002 (0.051) Maximum
Timing Chain Deflection
.375 (9.5) from taut position [total .75 (19)]

[email protected]

11-11-2019 03:01 PM

I’m interested in the rockers and cam
i need to talk to my builder, I’m out of town for the next week and a half and won’t see him until late next week
what valve cover did you use with the rockers?
and how much for the cam

Griff

11-12-2019 12:23 AM

Quote:

Originally Posted by phragle (Post 4714494)

Well he doesnt want to tune or change the exhaust....

I was just adding that to the cam specs you posted so he'd know it should work without an ECM re tune.

[email protected]

11-12-2019 06:45 AM

Thanks griff
i

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