I had a 383 Stroker built for my boat. 4 bolt block,All new parts,including SCAT crank,KB Forged pistons,H Beam rods, Comp X treme energy marine cam,Dart iron Eagle heads, Etc etc. Engine builder is very well known and respected for his work, A very detail orientated guy. Very careful and extremely knowledgable.
I asked for a 400 Hp max engine ( To save my outdrive) that would run on 89 octane. ( Lake Gas). Eldebrock ESP intake and new 800 cfm Carb. Electric Fuel pump, New Accel HEI ignition.
Here's the catch. Engine starts and runs like a watch (Everything was balanced) Excellent throttle response. Pulls this Approx 4000
lb. boat up on plane in a flash. BUT it will not rev past 4700 rpms.
Builder say it should easily pull to 6000 rpm. timing is set at 12 advance initial 36 max. Dist, only has 24 degrees built in. No detonation. Plugs read as they should with no sign of lean or rich.
Tried primary voltage jumper to check ignition. no improvement,
checked carb linkage for full open. Fuel pressure is reading 1 1/2 lbs. at WOT. I've spent 2 weeks on the phone and trying to sort this out to no avail. I have approx. $7000 spent in this entire engine build and install and the boat runs about 6 mph faster than last season with a whipped 350. Any ideas will be appreciated.