Go with a mirage plus prop. The “plus” means has a good amount of bow lift. Over 70 you will want to consider a nose cone on the outdrive and if I starts to chine walk a set of tabs or correct prop will help with that.
My SBC 452hp 383 stroker with an alpha would run 72 on gps with a 202 Lpx Crownline! Love it, figured you’d get a few more mph out of it. I ran a 22 pitch enertia. I did that swap ten years ago.
Thats amazing would love to do the same thing. What outdrive most dont like being shifted with motor over 600-700 rpm. Is it raw water cooled what motor did it have befor. Love this wanted to do this swap sence the day i bought my boat 5 -6 years ago the carbed 4.3 still going strong lol what prop size
Awesome! I’m working on my swap right now. How did you guys do the exhaust? Is it through the alpha Y pipe still or did you run it through the transom somewhere?
All good , Fast ; but why in the hell would you put nos on a non drag boat ? Tune the motor match the prop. Good to go. ! vs 15 sec of rod popping through the block and may be through the haul ? Just a thought . Cheers
I wired the interrupted switch into spare input on the holley and set it up to trigger the 2 step rev limiter. Then Set 2 step rpm to 400rpm. It's just enough to to get it to dip but not stall out.
@travtech1 tried this with my carb MSD setup, but it will only allow a minimum of 2000 rpm. Many people are turning off 1 bank of coils momentarily to allow the engine to stumble and fall out of gear.
Boat engines have must a lot more cam lift and duration on them so they don’t like to rev very high and make most of their power lower in their power band. Most high performance boat engines and outboards rev to 6500 rpm max because they can hold higher rpm’s at wide open throttle for longer periods of time without stressing out the engine. Higher rpm’s put a lot of strain on the valvetrain and it becomes harder to keep the engine from overheating. Of you cite race engines do that just know they get rebuilt every race. These engines get rebuilt after 200-300 hours for high performance engines and 500-1000+ if they are regular boat engines.
Why is the tuner so focused on a 100 shot of NOS. (Idles to high 100 shot) (It runs good 100 shot) ( it runs runs bad 100 shot) Thought this was a nitrous video
DEFINITE IMPROVEMENT OVER THE TYPICAL GM BOAT ANKER ENGINE'S THAT SUCK ASS. NOW IMAGINE A HIGH RPM 5.0 FORD COYOTE ENGINE IN IT. IT'S ALL ABOUT PROP RPM'S REASONABLY SPEAKING. NOW IMAGINE A 10 SPEED 10R80 FORD TRANSMISSION HOOKED TO IT. IT COULD TAKE A BIGGER PROP WITH MORE PITCH, AND THAT TRANSMISSION WOULD BE IDEAL FOR ALL SCENARIOS !. POWER FOR JUMPING UP ON PLANE QUICKLY, TOWING POWER, HIGH SPEED, LOWER RPM CRUISING SPEED, FUEL ECONOMY, LESS WEAR AND TEAR. THE LIST GOES ON.
@@travtech1 I CHALLENGE YOU TO EXPLAIN WHY. ASK YOURSELF WOULD YOU OWN A CAR WITH ONE FORWARD GEAR. BTW, A PERSON ON RU-vid DROPPED A TURBO CUMMINS ENGINE IN A BOAT. IT WAS SLOW. THEN HE HOOKED AN OLD STYLE AUTOMATIC TRANSMISSION TO IT WITH I THINK 3 FORWARD GEARS. NOW IT DOES OVER 90 MPH, AND JUMPS UP ON PLANE QUICKLY.
Pretty nice work guys. Im curious though, why start with crappy hull? If you put all this in a fast by design hull you would be making impressive speed numbers and have a much cooler boat in the end. Bow riders are for kids
My last boat was a closed bow eliminator daytona 25' cat with twin turbo stroker bbc. So I get it. My family enjoys this boat and it works well for us right now.
@@travtech1 looking forward to seeing what you come up with next. Again good work didnt mean any disrespect on hull choice. You have your reasons for it.
