Maybe worth a consideration ?
-Good time to have injectors gone thru. If you send them to arcticfriends maybe send ecu too so he can see if stock tune ? Hr knows these 502moi’s inside and out.
- if S30’s 502 mpi’s have oe cams are in good shape consider these.

I don’t see That crower cam having much, if any, better performance than the stock cam. That grind Maybe good for a tow truck ? :wink

Just round table discussion

For once, I'm one step ahead of you!

Smitty went thru my injectors earlier this year. I already PM'd him to see if he can look at my tune and help me decide if I should go back to the stock cam or what...

THanks for the input!

So today I determined that the Stbd motor appears to have the same Crower cam in it, but in much better condition. Not sure how I feel about that, but I'll admit I was hoping to find the stock cam instead.

It might be worth checking the open load on the valve spring in the bad lobe position and compare it to a few others or original design specification.

I would contact Crower. You never know, they may do something for you on the cam. I don't know about recently, but that company has a stellar reputation for standing behind their well designed, high quality parts. I bought a set of their stainless roller rockers years ago and noticed one rocker had a little hitch in it when changing cams, well they had me send back the whole set and replaced the bearings in all of them. They had the candor to admit that they were not happy with the original bearing supplier. I am now going to use them again in an upcoming project.. That may be a cam core issue - cast core or not, there are zillions of examples of cast core cams giving excellent service life with high performance american V8's.

All the old springs are mixed together now in a bin, so I have no idea which spring was in that position. Good idea though.

Yeah, I plan to call them today, it certainly can't hurt.

Do you know the history of these motors. What was done and when and how many hours since the rebuild/refresh or whatever was done.

There was an old FRAM filter commercial years ago "you can pay me now or you can pay me later". So, you can do the bare bones minimum and hope nothing bites next boating season.

Or, you pull both motors and go through and refresh them and start the next season with a degree of comfort that all is good.

No real history. 2 prior owners were basically clueless about any of it. Best I can tell, boat changed hands in 2004 and these motors were built then.

Port motor will be totally gone through this fall/winter. If starboard motor doesn't run perfectly after head refresh then I'll pull it and have it gone through as well.

I'm not stressing about it. After dumping $45K into my old Cigarette for 2 new engine builds from a supposedly well regarded marine engine builder, and still having an unreliable boat, I'm taking the low buck approach this time and not expecting miracles.

I get it. When I got my boat I was told approx 50 hrs on rebuilt motors and 40 on drives. Going thru all the receipts nothing on the heads. When questioned was told springs were tested and ok. So what he told me was 500+ hours on Hp500's tired springs. They will be history this winter.

Believe nothing of what you hear and half of what you see.