User Tag List

Page 1 of 8 1 2 3 4 5 6 7 8 LastLast
Results 1 to 15 of 112
  1. #1
    Join Date
    Jan 2017
    Location
    Albany NY
    Posts
    377
    Thanks (Given)
    23
    Thanks (Received)
    15
    Likes (Given)
    84
    Likes (Received)
    108
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    300R nonsense thread

    I figured this was needed. So instead of clogging up wildmans thread post it all up here.

    Will the new Mercury 4 stroke 300 out preform the xs and x 2 strokes?

    will there be HP upgrades for it soon?

    when will mercury come out with a 350R?

    The world may never know!

  2. #2
    Join Date
    Dec 2007
    Location
    Princeton, NJ
    Posts
    2,412
    Thanks (Given)
    43
    Thanks (Received)
    113
    Likes (Given)
    1471
    Likes (Received)
    1236
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    .


    .


    a friend asked me what I guess the potential horsepower could be on the new 300R 4.6L V8 outboard motor.

    I said there's no guessing, we can calculate the potential horsepower

    currently the 400R motor generates 400HP from a supercharged 2.6L engine block

    We first need to get the multiplier to determine the HP / Liter (in other words, what is the horsepower per liter)

    That formula is

    2.6 * M = 400 HP


    calculating for M, we get

    M = 400 / 2.6

    M = 153.846

    or in words, MercuryRacing is capable of building 153 horsepower for every supercharged liter of powerhead

    so what is the 300R potential for producing maximum supercharged horsepower?

    let's calculate again


    4.6 * M = X where X is the maximum supercharged horsepower we can squeeze out of the 4.6L powerplant

    we already calculated the M (multiplier) that 153, or 153.846 to be exact

    thus

    4.6 * 153.846 = 707 horsepower

    in words it means, if we apply the same supercharging know how of MercuryMarine to their new 4.6L platform, we have a potential horsepower maximum capacity of 707 horsepower

    let's detune that a little to make a race engine with 0 warranty of say 650 HP

    detune that again to add warranty and we're down to a motor between 550HP and 650 HP

    so thats the answer, the 300R when supercharged has the potential to develop 550~650 HP

  3. Likes Kcraft liked this post
  4. #3
    Join Date
    Feb 2014
    Location
    Missouri
    Posts
    1,036
    Thanks (Given)
    2
    Thanks (Received)
    47
    Likes (Given)
    11
    Likes (Received)
    62
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Following the success of 7 marine. I can see merc doing their own version of gm based 4.8 5.3 and 6.2l engines in outboards like the mc1300 and such inboards.

    Only without the mess the ford 5.4l piston melting failure of an engine the Yamaha 300 was.

    I also see see more work in the 2.2l and 3.8 or whatever 4 and 6 cylinders verado style

    honestly some of this stuff is just to dang heavy for the average boat. My ‘88 50-70hp was 80lbs wet in a 4s I’m looking at 35hp max and 40-60hp will sink the transom.

    I think 2 800hp supercharged 8.2l would sell more then 4 300hp in the big boat market but will anyone do it.

  5. #4
    Join Date
    Mar 2008
    Location
    Tourist Trap, Florida
    Posts
    9,227
    Thanks (Given)
    119
    Thanks (Received)
    432
    Likes (Given)
    1533
    Likes (Received)
    3044
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Back to the gearcase being the limiting factor....

  6. Likes Instigator liked this post
  7. #5
    Join Date
    Jun 2018
    Location
    Floating around
    Posts
    1,428
    Thanks (Given)
    53
    Thanks (Received)
    106
    Likes (Given)
    448
    Likes (Received)
    668
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Meh, i'll be two stroking my thrills for some time yet but I'll enjoy the show from the bleachers and toss is a wise crack or two along the way
    Hydrostream dreamin

  8. #6
    Join Date
    Sep 2014
    Location
    Iowa
    Posts
    242
    Thanks (Given)
    7
    Thanks (Received)
    13
    Likes (Given)
    35
    Likes (Received)
    73
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by XstreamVking View Post
    Back to the gearcase being the limiting factor....
    Yup. They can't even make one to hold 400 yet

  9. #7
    Join Date
    May 2009
    Location
    Ormond Beach, Florida
    Posts
    800
    Thanks (Given)
    36
    Thanks (Received)
    81
    Likes (Given)
    212
    Likes (Received)
    341
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don’t see forced induction in the cards with this package. I think you will see 2 more cylinders before you see a blower on the V8’s. I think if their future was in forced induction the 300R would have been based on the new v6 platform. I’m sure there was a lot of heated discussions when they were planning this platform on NA vs. forced induction.
    Mark

  10. #8
    Join Date
    Jan 2017
    Location
    Albany NY
    Posts
    377
    Thanks (Given)
    23
    Thanks (Received)
    15
    Likes (Given)
    84
    Likes (Received)
    108
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by mjw930 View Post
    I don’t see forced induction in the cards with this package. I think you will see 2 more cylinders before you see a blower on the V8’s. I think if their future was in forced induction the 300R would have been based on the new v6 platform. I’m sure there was a lot of heated discussions when they were planning this platform on NA vs. forced induction.
    If mercury does end up making a v10 that will be one bad ass sounding motor

  11. #9
    Join Date
    Apr 2001
    Location
    Western Pennsylvania
    Posts
    3,413
    Thanks (Given)
    33
    Thanks (Received)
    45
    Likes (Given)
    79
    Likes (Received)
    237
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Mercury didnt have much choice other than develope the 4stroke. Blame it on the EPA, etc.
    http://www.stvowners.com

    Checkmate 2002 Convincor 270 496 MAG-HO

    2003 Cougar 22MTR w/300xs SOLD
    90 21Skater w/300xs - sold
    98 STV Euroski w/280 - sold


    2006 Trailblazer SS 6.0l 395hp

  12. #10
    Join Date
    Apr 2001
    Location
    Windsor, Ontario
    Posts
    5,576
    Thanks (Given)
    0
    Thanks (Received)
    58
    Likes (Given)
    2
    Likes (Received)
    219
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Didn't anyone tell Evinrude about the EPA. Going 4 stroke was voluntary.

    My beef is not 4 stroke, it's weight, which also applies to the gen 2 Etecs

    All good motors, just not for those tha worship Colin Chapman

  13. Likes Instigator, David - WI, powerabout liked this post
  14. #11
    Join Date
    Jan 2017
    Location
    Albany NY
    Posts
    377
    Thanks (Given)
    23
    Thanks (Received)
    15
    Likes (Given)
    84
    Likes (Received)
    108
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The weight is right on par with the 300xs. Pretty impressive IMO they can build a four stroke that weighs as much as a two stroke.

    Im sorry but the 225PM power to weight days are over.

  15. Likes Instigator, panther150 liked this post
  16. #12
    Join Date
    Apr 2001
    Location
    Cardington Ohio
    Posts
    17,117
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    On weight, agreed that the truck motors are now even w/weights of two strokes.

    A point though, that is on EPA motors, not our hot rods.

    So really, the 4 strokes are still 50 lbs heavy.
    On one of the DI 3.3 Fichts I converted back to conventional induction, I weighed and measured the difference.
    It dropped 50 lbs.

    Im a fan of what I see w/the new V-8 but get the shakes thinking about popping one.
    Dual over head cams, 4 valves per, etc.

    I remember having beers w/the svc mngr of a large water sports dealer in Fla when the hot rod 4 stroke PWCs first hit the scene.
    He said they were already popping and so expensive to repair that owners of 2 yr old skis were scrapping them.
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

  17. Thanks 22R thanked for this post
    Likes David - WI, specboatops liked this post
  18. #13
    Join Date
    May 2016
    Location
    keys
    Posts
    380
    Thanks (Given)
    13
    Thanks (Received)
    15
    Likes (Given)
    129
    Likes (Received)
    136
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I heard there working on a plug in tuner that will drop 125lbs off it!

  19. Likes stoker2001 liked this post
  20. #14
    Join Date
    Oct 2011
    Location
    ft pierce fl
    Posts
    1,571
    Thanks (Given)
    30
    Thanks (Received)
    39
    Likes (Given)
    618
    Likes (Received)
    329
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Whaaaaat View Post
    I heard there working on a plug in tuner that will drop 125lbs off it!

    What will be the cost for the weight reduction tuner? Will one tuner lower the weight on both motors for twin applications? It would suck if one tuner only would shave weight from one motor.

  21. #15
    Join Date
    Jun 2018
    Location
    Floating around
    Posts
    1,428
    Thanks (Given)
    53
    Thanks (Received)
    106
    Likes (Given)
    448
    Likes (Received)
    668
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rumor has it the tuner works on the whole engine by isolating protons from neutrons causing them to float with a 7% newtonian charge given only by the new solar powered cels used in the tuning module. These cels are designed to harmonize the light and heat into a gamma pattern that runs a b-spline polynomial through its algorithm for this effect. Green technology is amaze balls, i am humbled in awe of these new tuners
    Hydrostream dreamin

Page 1 of 8 1 2 3 4 5 6 7 8 LastLast

Similar Threads

  1. New Mercury 300 Pro XS V8 vs 300R V8
    By Skip 7750 in forum Four Stroke and Direct Injected Two Stroke Engines
    Replies: 46
    Last Post: 10-10-2019, 12:00 PM
  2. Some YouTube nonsense
    By Bodhi in forum General Boating Discussion
    Replies: 15
    Last Post: 02-04-2016, 12:40 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Diamond Marine