23' Performance 5.0 vs 5.7 Mercruiser

[Hooligan]

I am wondering if anyone has any comparison numbers for me: a 23' with either a 5.0 or 5.7. I am looking for Cruise speed, WOT speed and accomodating RPMs.

I know quite a few 23's around had the 5.0 and just looking for comparison against the 5.7.

Turns out my motor (that I purchased in the spring) has good compression on only 7 cylinders and has been pulling one along for the ride. 185 psi compression in 7 cylinders and only 40 in the weak cylinder (#5).

I could never get the boat over 4250 rpm... tried three different props and got some good speed but I'm still missing atleast 800-1000 on top.

Time to replace the motor or rebuild, trying to decide which way to go: carbed 5.7 or MPI 5.0....

Numbers please? Anyone running a 5.0 or 5.7?

Thanks dudes!