1997 fountain 38 with 22% prop slip
07-24-2014, 11:08 AM
#42
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I've just purchased a 38 w/ 750+'s and I'm running the 32's also (4 blades) on IMCO extreme SC's. They have an inward rotation (port-clockwise, starboard-counter). Does the rotation matter? I've seen almost all fountains w/ the inward rotation, and formula, ect w/ outward rotation.
07-24-2014, 11:48 AM
#43
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I've just purchased a 38 w/ 750+'s and I'm running the 32's also (4 blades) on IMCO extreme SC's. They have an inward rotation (port-clockwise, starboard-counter). Does the rotation matter? I've seen almost all fountains w/ the inward rotation, and formula, ect w/ outward rotation.
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07-24-2014, 02:53 PM
#45
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I've just purchased a 38 w/ 750+'s and I'm running the 32's also (4 blades) on IMCO extreme SC's. They have an inward rotation (port-clockwise, starboard-counter). Does the rotation matter? I've seen almost all fountains w/ the inward rotation, and formula, ect w/ outward rotation.
07-24-2014, 06:13 PM
#46
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My same boat (newer big step) side by side would run 89 at at 5200 rpm on stock 32 4 blade bravos when the engines were stock 575scis, that's 15 percent slip.
You guys both have lots of room to lower slip and gain some performance
07-24-2014, 07:46 PM
#47
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110 with a small step 38 Fever, with 800's, sounds a bit of a long shot. The Fever hull was never one of Fountains faster hulls, even with the steps. Your boat with a pair of 415HP 502 mags, was about a 70mph boat, maybe a tad more, talking real world conditions. Not 4 ounces of fuel, at sea level, with 60 degree air temp. Im talking hot summer day, 1/2 tank of gas, and a few people on board.
I would think 90 or maybe low 90's, is a realistic goal if you truly have 750hp per side. But, you probably need some tweaking to get there. Prop rotation, prop style, trim settings, etc. Without indicators, one drive being off a number or 2 from the other can make a big difference at 90mph range.
In regards to the engines, what exactly was done to them, to go from Eddie Young 625's, to 750's? To gain 125hp, there had to be some MAJOR changes made, or a blower added. What are the details of the build?
I would think 90 or maybe low 90's, is a realistic goal if you truly have 750hp per side. But, you probably need some tweaking to get there. Prop rotation, prop style, trim settings, etc. Without indicators, one drive being off a number or 2 from the other can make a big difference at 90mph range.
In regards to the engines, what exactly was done to them, to go from Eddie Young 625's, to 750's? To gain 125hp, there had to be some MAJOR changes made, or a blower added. What are the details of the build?
07-24-2014, 08:04 PM
#48
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NMCA_Chevy - you've been asked some very pertinent questions to help people help you that you've blown off responding too.
Please answer so they can help you.
Please answer so they can help you.
07-25-2014, 11:36 AM
#49
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To be honest, I'm still working my way up to a WOT run. I purchased the boat about 4 weeks ago, and have been learning it's characteristics. Previous owner stated 103, but I'm waiting to verify. I don't want to end up on someone's youtube channel...
07-29-2014, 01:54 PM
#50
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Ummm, I'm pretty sure the fever and lightning have the exact same bottom. The cap and interior is the only difference with the interior on the fever being much wider and roomier than the lightning. I have had a 2001 38 lightning and a 2001 38 fever in my yard side by side, and the rubrail down is identical, sit on the same trailer identical. Now maybe the way the weight is balanced can affect the speeds? that I don't know, but he is definitely not running a true 750/side or the props are jacked, or he doesn't have it trimmed and tabbed right. should be a 95-100 mph boat.
Last edited by 4bus; 07-29-2014 at 01:56 PM.
