New Cam/ Reversion issues?
 

Putting new top ends on my twin merc 260/350's. Curious if this cam would cause any reversion issues. As I have ordered everything but the cams and push rods.

I ordered new 170cc aluminum heads, 1.5 roller rockers, edelbrock performer rpm dual plane intake, edelbrock 1409 carb. Using factory manifolds with tall riser spacers, and thru-hulls, for now, until I land some more cash for aftermarket manifolds and risers.

According to build/dyno sheets depending on the cam selection HP/TQ numbers are anywhere from 365hp/400tq to 425hp/395tq.

The cam I am looking at witht he rest of the goodies produces the 365/400 numbers at about 5200-5400 rpm which is right where I want to run at WOT.

Cam specs:
Hydraulic flat tappet
Basic Operating RPM Range
1,600-5,200
Duration at 050 inch Lift
214 int./224 exh.
Advertised Duration
272 int./282 exh.
Valve Lift with Factory Rocker Arm Ratio
0.442 int./0.465 exh.
Lobe Separation (degrees)
112
Camshaft Manufacturers Description
Fair idle, low midrange torque/horsepower,

Second cam, which I think would be better but, closer to reversion issues...

Hydraulic flat tappet
Basic Operating RPM Range
2,400-6,000
Duration at 050 inch Lift
224 int./234 exh.
Advertised Duration
282 int./292 exh.
Valve Lift with Factory Rocker Arm Ratio
0.465 int./0.488 exh.
Lobe Separation (degrees)
114



Thanks!

should be good, im running a lt4 hot cam with stock exhaust and have no trouble with reversion.

my specs are as follows
218/228 @.050
.525 lift
112 LSA
1.6 rocker arms

You start sucking water back the wrong way when you get to the high 230's @.050. 235 is borderline with stock exhaust, you can get 239 with good drop in a good set of tail pipes like stainless's or EMI's. The Square stock ones should be 235 or less..