redacted due to insurance issues
I hope your 1" spacer is a 4 hole or Jomar "Powercone"; with that combination an OPEN spacer will lose everywhere.Hello, I am now the proud owner of an original 63.5 390FE and now this monster of a 460. Supposedly 25 hours on it, so I figured at least 50. Older seller, so hopefully it hasn't been flogged.
It is mild built, .030" over w/ D0VE heads, no idea if they have been worked or not, full MSD ignition, Rewarder Twisty OT headers with huge primaries, 800 cfm Holley Marine, and now for the confusing part...a Torker I intake! My RPM Air Gap and 1" spacer should be here today / tomorrow. I debated between this, a Torker II, and a Victor, and I feel like I made the best educated guess I could prior to gaining access to the forum. It will be a lake cruiser, not a max effort river racer.
I have no idea what cam or valvetrain yet, but it is definitely more aggressive than the stock 390 cam, yet still pretty mild I'd say. I twisted some NGK nickel WR5's @ .044". My FRPP tall valvecovers should be here soon as well, so I will get a look at things hopefully this weekend.
I have only run it off of a hose for about 10 min. in total, so the temp gauge hasn't budged, but PO ran it at 140-160 deg. It has a Canton 10 qt. pan full of VR-1 20w50. The oil pressure gauge is 80 psi and it stays pegged out, at least while cold. Hope it comes down as temps come up.
Idle speed is high, 1,200 or better, so I plan to drop it to 600-800 unless this is a bad idea in this application. I will stick with the Motorcraft FL-1A filter, but I haven't yet pulled the trigger on fresh VR-1 as I wasn't sure if I should stick with 20w50 or not. Does VR-1 have enough zinc in it as-is for this application, or should I add a bottle of ZDDP as well?
The plugs I pulled weren't that old, but they are completely sooted up. I'm sure either due to low operating temp, wrong plug temp range, or the damn Torker I with issue compounding 1" spacer. I'm hoping I can dial-in the Air Gap w/o having to get too much into re-jetting. I still have to learn the Holley carb though. I just learned the Edy carbs last year.
The D0VE heads are just pre-emission heads that have small chambers for a slight compression bump correct? Approximately 9.2:1 or so depending on the slugs and decking? The MSD has a 6,000 RPM chip in it, but I hear that these jet boats usually won't allow the motor to spin up to redline in the water, so I have no idea what my MAX or even average RPM will be. Supposed top speed is around 74-76 MPH, though that seems ambitious considering the 350'ish HP I'm guessing. Though this is a Youngblood TX-19 hull with a Berkeley 12JR pump. The thing is 3' long! I really lucked out with this pump, I was clueless at time of purchase.
BTW, these intakes are huge! Can damn near fit a beer can through the gaskets.