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Search: Posts Made By: RPAYNE509
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Forum: Electronics
02-26-2025, 01:37 AM
Replies: 4
Views: 1,561
Posted By RPAYNE509

I was planning on buying mefi burn, its $995 now....

I was planning on buying mefi burn, its $995 now. The issue is my indmar 350 tune will be locked so I will have to just wipe the PCM. There are no refference tune files available to start from so the...
Forum: Electronics
02-25-2025, 12:35 PM
Replies: 4
Views: 1,561
Posted By RPAYNE509

Any one have MEFI 5 files?

Does anyone have any MEFI 5 bin files that would be willing to share? Preferably 383 or 350 but i think a bbc file could be scaled fairly easy

I spoke with bob and MEFI burn and he wasn't overly...
Forum: General Q & A
02-19-2025, 06:54 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

I see RHS mentioned often in forum discussions,...

I see RHS mentioned often in forum discussions, they seem to be non-existent even second hand. The Aluminum version sound like exactly what I want!



3500rpm is about right. I generally prop for...
Forum: General Q & A
02-19-2025, 06:01 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

Those EQ assembled vortecs are $810 out the door...

Those EQ assembled vortecs are $810 out the door - not bad. They state thicker deck improved port finish, 170cc intake, no mention of max lift.
Speedmaster offers a pair of 180cc Bare iron vortecs...
Forum: General Q & A
02-18-2025, 07:37 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

I was a bit concerned that 200cc heads would give...

I was a bit concerned that 200cc heads would give ups some low range torque. I hoped to reuse the original vortecs, however 3 out of the 4 between the original and junkyard core motors were cracked....
Forum: General Q & A
02-18-2025, 03:59 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

I'm with you on there being value in the peace of...

I'm with you on there being value in the peace of mind. Huge plus that you have the forged crank in that 496. The incremental cost to get into a better piston design and move from hyper to a mid...
Forum: General Q & A
02-18-2025, 01:50 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

I wasn't sure if forged was necessary for my...

I wasn't sure if forged was necessary for my goals, I believe all Merc/Indmar 350/383 cranks were cast. Looks like Eagle's 4130 Forged Crank is only $300 or so more so that's an option.Scatt &...
Forum: General Q & A
02-18-2025, 01:05 AM
Replies: 22
Views: 3,294
Posted By RPAYNE509

My current boat is running a 350 mag i built (96...

My current boat is running a 350 mag i built (96 carb setup)
speed pro hypertunetic pistons (so so quench design @.038)
Original 64cc 14096217 heads
9.6:1 Static, 8.79:1 dynamic with the factory...
Forum: Do It Yourself, Boating on a Budget
02-18-2025, 12:23 AM
Replies: 15
Views: 4,516
Posted By RPAYNE509

Personally I am a firm believer in the benefits...

Personally I am a firm believer in the benefits proper quench. The NA and boosted engines I have built with propper chamber/piston matching and clearance have run better and been less detonation...
Forum: General Q & A
02-17-2025, 11:15 PM
Replies: 5
Views: 1,825
Posted By RPAYNE509

Consistency is decent, 10% is optimum. You are at...

Consistency is decent, 10% is optimum. You are at 12%. Those numbers do seem low though, my 97 350 magnum (carbed) was 155+- (warm)

How strong were the starters/batteries turning them over and...
Forum: General Q & A
02-17-2025, 06:40 PM
Replies: 22
Views: 3,294
Posted By RPAYNE509

Call me crazy, pump gas 383 build

I am clearly a glutton for punishment and bought another boat with a frozen engine block. This time a Malibu 23LSV


This one properly froze.........
Forum: Do It Yourself, Boating on a Budget
03-12-2021, 10:15 PM
Replies: 9
Views: 1,694
Posted By RPAYNE509

Biggest reason is increased efficiency and...

Biggest reason is increased efficiency and reduced detonation risk. A proper quench can increase fuel efficiency 10-15% on some engines while making slightly more power and torque through the entire...
Forum: Do It Yourself, Boating on a Budget
03-12-2021, 10:12 PM
Replies: 9
Views: 1,694
Posted By RPAYNE509

i believe you are right on the compression...

i believe you are right on the compression height. I am curious if the quoted 9.4:1 is correct for this engine, if so I feel pretty good about running that same range with proper quench detonation...
Forum: Do It Yourself, Boating on a Budget
03-12-2021, 10:06 PM
Replies: 9
Views: 1,694
Posted By RPAYNE509

Yes thats what I was looking at. I am surprised...

Yes thats what I was looking at. I am surprised there aren't more off the shelf hypereutectic options with that dish design to compliment the head. I don't need forged for the power or cost I am...
Forum: Do It Yourself, Boating on a Budget
03-12-2021, 06:44 PM
Replies: 13
Views: 4,512
Posted By RPAYNE509

I would agree with most of what has been said,...

I would agree with most of what has been said, hopefully they were fogged well and stored somewhere decent and moisture shouldn't be an issue. Plan on draining fuel, replacing filters and likely...
Forum: General Boating Discussion
03-12-2021, 06:38 PM
Replies: 17
Views: 3,447
Posted By RPAYNE509

Wow thats a gorgeous boat

Wow thats a gorgeous boat
Forum: Do It Yourself, Boating on a Budget
03-12-2021, 06:36 PM
Replies: 9
Views: 1,694
Posted By RPAYNE509

Trouble sourcing pistons for 350 mag

I am building a new bottom end due to a cracked block on my 96 mercruiser 350 mag. I am having a difficult time finding a piston with an adequate design for a proper quench build.
The engine is...
Showing results 1 to 17 of 17


 
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