HP Needed to Achieve 90 MPH
 

What horse power do I need to achieve 90 MPH in a 38 Fever none stepped hull?

Mild thunder on here hit 89 mph with 800 a side in a non stepped 38. This is with Speedmasters drives.

You can get 10 mph out of set up. So the exact hp may be different.. My stepped 38 ran 90 when i got it . Now it will bust a hundred (without even touching a motor) . Aprox 700 hp each

@mcprodesign - what size steps do you have? I have a '99 38' Fever with the small steps. With full fuel, full gear, a honker of a stereo system and my fat ass on board, I busted 92mph on a short stretch. How's yours set up? What drives? Props? Gear ratios? Ect? If I had more lake at the time, I'm sure I could have broken triple digits. I'm running 900hp/side. Side-by-side motors, small steps.

Don't forget to count the wight of the skanks and your gold chain. That some times get left out of the equation

Full tank of gas on a non stepped hull with two skanks u will need around 900hp per side

^^youre mistaking. I just posted Joe runs a non stepped boat. 89.6 with 800 a side. Still tweaking some things.

Sportmaster -2 2004 gen XR drives. Have to change the oil a lot to keep them clean and healthy, but they use little HP to make the props turn. But you have 900 hp so you might need stronger drives.
I blue printed my lowers ( myself) and the bottom of my boat ( myself) and went faster. I also get 3-4 mph out of the herings over the maximus 5 blades. Our boats love 5 blades . I have tried 4 and 6 blades. 6 blades will work but hard to get on plane. Mine is also a small step 38 . I have no plumbing or kitchen. Just a porta potty in the bathroom.

It's probably a little more weight forward of the cockpit having the sink and plumbing. I ran without an anchor and anything in the galley to get the bow lightest I could for speed. Hope this helps!

Like ICU lookin says, I'm tickling 90 with 800hp per side, with SSM IV drives. The SSM drives gobble up quite a bit of power compared to a bravo. You might be able to get it done with a pair of 750's and bravo based drives. Maybe even 700's. My boat is pretty stern heavy compared to say, a Bravo/NA engine setup. I'm running all iron engines, blowers, chillers, transmissions, and the heavy ssm drives. Rough estimate, my engine packages, probably add about 800lbs to the stern, compared to a N/A aluminum headed bravo combo. Then throw in the fact the engines are almost a foot forward in mine due to tranny's, that isn't helping bow lift, which these straight bottoms like.

My hull is also a 1990.

These hulls arent' nearly as light as and fast as people think they are. The 36/38 Fever was never one of fountains really fast hulls, even once they added steps, they were still kinda slow compared to the newer 38 lightnings.

Also, my speed number is a realistic one. She runs upper 80s with nearly full tanks, ton of stuff in cabin (tools, spare parts, a/c unit, duffle bags, sleeping bags etc), 2-3 people on board, and in freshwater. Not a one time in the perfect chop , in salt, with 1/4 tanks of fuel, and nothing on board number.

Mike Tkach here on oso, has a 99 38 fever with a pair of 1200hp whipple engines, and dry sump #6's. He's gone deep into the 120's with it, and it accelerates like a drag car lol

I have a 97 38 Fever (small steps) with IMCO -2 lowers, XR uppers and with 502s with Dart Pro1 CNC'd heads, Whipple 2.3L superchargers with intercooler it ran 97.5 with 2 people and nearly full fuel and probably had a pinch left but unfortunately the rods didn't like turning 5800 with the labbed 32 Bravos. I've since replaced the bottom ends with some strong 540s, i'm still tuning but running way rich I'm at 97+, I'm expecting 105 or so once i'm done tuning.

Here's a video of a friend in a 29 Fever with a 1000Hp Chief Engines and myself playing around in the North Sound Grand Cayman
https://youtu.be/wof2ekOUw14

here me doing some passes. My drives trim at different speeds so it's leaning at cruise

https://www.youtube.com/watch?v=kZBI6-w0Yv4

whenever I put the herings on to get every bit out of it i wear a helmet. I should be wearing my lifeline too. and i will

My 2000 Fever with standard length XR's ran 81ish with a set of new 525's and bravos. When I switched to -2 Imco's I ran 85 out of the box. It ran 88 with a set of Ilmor 625's and set of Px5's and then 95 when I upgraded to Ilmor 710's and Px5's. There was more to be had with set up but I sold the boat.

the OP is non stepped. So the stepped hull numbers don't help a lot. Lol

Lol! But if you go by Mild Thunder going 90 w 800 per side. And small steps going 90 w 700 hp. It makes it look like a 100 hp per side difference. Then you add 5-10 mph in set up to that. So he can get an idea:). Also its cool when anybody with a 38 has a thread. I love my 38 and love to see what other 38's are up to ;)