What is the lift on a factory cam for an oe 350 vortec for 98 gmc sierra...

[Paden Ramshur]

...5.7, does it have hydraulic lifters? im thinking of putting a new cam, bearings, and lifters and need to know what lift is on an oe cam for this engine and what kind of lifters is in it?

 

[Molson02536]

...5.7, does it have hydraulic lifters? im thinking of putting a new cam, bearings, and lifters and need to know what lift is on an oe cam for this engine and what kind of lifters is in it?

I believe the cam part # is 10241264, also there is a cam from a marine motor and the part # is 14097395. You will i find more power if you swap to this cam.

The 10241264 is standard L-31 Vortec fare. It's a mild roller with a fairly wide LSA. Specs are at .050 lift and a 1.5 rocker 191 intake with .414 inch lift, 196 exhaust with .428 inch lift the LSA is a computer controlled wide 111 degrees.

The 14097395 is a bit more aggressive from .050 lift and with a 1.5 rocker its intake is 196 degrees of duration and .431 inch of lift, the exhaust is 206 degrees with .451 inch of lift. Its LSA is a computer/SMOG unfriendly 109 degrees.

This cam with Vortec heads would move the power up from 265 or so with the 264 cam to around 300-315 with the 395 cam. This will run with Vortec heads without the need to modify them. The idle will be a little lopey, your computerized fuel injection will need a new program to be loaded.

Good luck and hope this helps.