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horsepower

  1. V-Drives
    So whos going out next weekend? I gotta know who I need to prepare to see (harass)!!
  2. Boats for Sale
    FOR SALE – Eddie “The Texan” Hill’s personal 1976 Hondo XH511-GT flat bottom race boat that I have converted to a two-seat lake playboat by installing a passenger seat and a larger engine. This is actually a “runner bottom”, the fastest design of all flat bottoms, and this one was built with...
  3. GN7 On the Dyno
    I'm wondering if anyone can give me a rough estimate on my horsepower/torque numbers? I never really thought about it until a friend asked me about how much power my motor is making and I really have no idea,,,here goes its a 454 .030 over standard deck height not decked, with 781 heads (no...
  4. Races and Boating Events
    Welcome to Horsepower Fest! The new event that brings all aspect of horsepower together! This event we be taking place during the day on November 12th, 2016 at The Avi Resort & Casino in Laughlin, NV on the grass between the hotel and the river. It encompasses all things horsepower related. If...
  5. GN7 On the Dyno
    Trying to calculate the horsepower my motor is producing without putting it on a dyno. The motor is a bbc 427 with dart pro 1 heads. Compression is at 13 to 1. Cam is a roller with approximately 656 lift 312 adv. duration. Motor runs 7200rpm and pushes my biesmeyer race boat to 98mph on gps. Any...
  6. Delta Lunch Bunch ( dlb )
    F14 and I took our 10' Addictor with our new to us 40hp up the Napa River yesterday. We towed it with my "mighty" S10 four banger. I believe our combined HP for both is roughly 162ish but who's counting. We had a blast but next time we are going to be a little more courageous and maybe launch...
  7. GN7 On the Dyno
    I'm sure everyone is going to pick apart the build, but I am about a week from hitting the dyno with the new creation so lets hear from anyone, how much horsepower? It's a 555 inch big block chevy, Dart big M, 4.560 bore, 4.250 stroke, 13.2 to 1 brodix bb2 xtra's ported by wes king dart single...
  8. GN7 On the Dyno
    Here's what I'm doing , old stock bore 454 ,9.25 compression with 8/71 , 2-1050 Doms , turned my AA to 6k with about 8-10# boost Heads are first casting ProTopline Aluminium 320cc that flowed 392 cfm with stock valves , the heads now wear Manley Severe Duty ProFlo w-11/32" undercut stems so...
  9. GN7 On the Dyno
    So I recently aquired a nice and unmolested BBC Gen IV block. I'm thinking about building this over time and eventually installing it in my jet boat or keeping it as a spare until my current motor finally dies. Luckily, I'm in a position that my current motor is running and I won't find myself...
  10. Parts for Sale
    Mercury 2.5 260 Horsepower SOLD Didn't get a buyer from this site but had a back up buyer from the site. Definitely helped get the word out. Thanks Performance Boats
  11. GN7 On the Dyno
    This little smallblock would make a hell of an engine for a jet. Check out the tq curve. http://www.yellowbullet.com/forum/showthread.php?t=591269
  12. PB Open Water
    A friend is looking to to buy a new (to him) motor and has found two possible options. The first one evidently was intended to replace an older 454 Magnum that made 365hp. It is a 2006 502 with an Edelbrock 750 Carb and a Weiand Manifold. The owner is saying he thinks it should make right...
  13. GN7 On the Dyno
    Anyone here play with spark gap while dyno testing? I'm in the market for a new distributer for my mild carbed Vortec SBC. I see some claims from companies such as DUI and ChevPro Marine that their HEI set-ups with 50,000 volts will increase horsepower on the order of 15+ because it allows for...
  14. GN7 On the Dyno
    Is there a correlation of how blower boost affects horsepower? As an example, if an engine makes 1000 horsepower while producing 9 lb. of boost, what should that same engine produce if the boost is increased to 11 lb. of boost with no other changes? Is there a predictable correlation of...
  15. GN7 On the Dyno
    I'm not going to Dyno this anytime soon and was wondering if anyone here has a similar build or the experience to give me their opinion. BBC 468 4 Bolt Main Forged Crank GM heavy Duty 7/16 Rods Clevite Main & Rod Bearings. MS829H – CB743HN Hamburgers 10 qt Oil Pan with Mellings HV Pump JE Flat...
  16. GN7 On the Dyno
    I'm just sayin...:)devil
  17. GN7 On the Dyno
    How much horsepower can a 2 bolt small block N/A deal safely withstand? I am gonna be building a motor for the street. It will be a 383 stroker deal. Probly max rpm of 6500 and shooting for 500 horse or so. I haven't started any parts chaseing yet. I was just wondering in case the truck I have...
  18. Greg Shoemaker
    Greg, you wrote an article years ago in Hot Boat about how much horsepower it takes to gain M.P.H in a jet boat. could you post that info. again. I'm afraid I may be getting ready to spend a lot on nothing.
  19. Greg Shoemaker
    I'm sure this has been studied before, but is there any kind of measure on how much horsepower is robbed by each pound in a jetboat.
  20. GN7 On the Dyno
    Hello, It seems that I have to turn to the boat guys again for some motor info. I'm close to finishing the build, and am concerned that I may not make the power I want. The combo is: 540 short block (8.5), total seal rings, ported RHS 320 heads 390 intake, 298 exaust @.800 lift, Super Chargers...
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