Big Block
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![Question](/forums/images/icons/icon5.gif)
On a 1999 454 mpi with 200 hrs. What should the compression be?
How many HRS. should it be good for, on average? More than a 1000 or less?
How many HRS. should it be good for, on average? More than a 1000 or less?
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I think your compression should be around 150 psi. My 454 Mag puked after about 550 hours. Keep an eye on your riser/manifold gaskets. That's what killed mine. I ran in salt a lot and ran hard.