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-   -   Extension Box on a 27 Fever stepped hull (https://www.offshoreonly.com/forums/fountain/327754-extension-box-27-fever-stepped-hull.html)

procharged 454 07-10-2015 12:48 PM

I removed the 2 inch drive spacer and gain 11MPH.. Original owner wanted better hole shot. Around 200ish they raised the drive height. They are faster with stock power. Do a seach and you will find what I am talking about..

ealesh33 07-10-2015 01:15 PM


Originally Posted by procharged 454 (Post 4328422)
I removed the 2 inch drive spacer and gain 11MPH.. Original owner wanted better hole shot. Around 200ish they raised the drive height. They are faster with stock power. Do a seach and you will find what I am talking about..

Yea I know they raised the x in that year area. My question was what drive you removed the spacer from. So if I'm understanding you correctly you had stock length drive with a 2" spacer is that correct ?

dspad 10-08-2016 04:28 PM

Found this post like to see if there is anymore info on the my drive was 4 1/2 below the bottom put a -2 short things are better but not seeing the speed increase happen 2000 27 fever 600hp 5 blade px5 hydro 70 mph best

jtbooten 10-10-2016 07:20 PM


Originally Posted by dspad (Post 4489751)
Found this post like to see if there is anymore info on the my drive was 4 1/2 below the bottom put a -2 short things are better but not seeing the speed increase happen 2000 27 fever 600hp 5 blade px5 hydro 70 mph best

How many RPMs?
Stock 1.5 XR drive.
I'm right at 600 myself. Same prop. 28 pitch. 74 gps half tank and 4 people last weekend. 79 today by myself and 20 gallons 5100 RPMs.

http://i37.photobucket.com/albums/e6...psp4l7viw4.jpg

dspad 10-11-2016 01:52 PM

5300 rpm
Bravo 1.5
Px5 hydro
70 mph
Slip 13

dspad 10-11-2016 01:56 PM

Can't turn a 28 pitch it's nuts
The px5 is 24 pitch
Stock 26 bravo spun up to 5100 69 mph
Boat and motor like the 5 blade
24 bravo 1 5500 73 mph
Have tried a lot of combos i think my X factor I am still wetting the drive to much at 2 3/4 below bottom

chancer540 10-11-2016 10:44 PM

i have a 93 27 ft fever, getting ready to drop a 540 in. goin to put a imco sc drive on it with a -2 imco lower. 1.5 ratio

what do you guys think would be a good starting point as far as props? and how do know when to put spacers in the drive?

try and bear with me very new to the performance side...

dspad 10-12-2016 05:44 AM

How much horsepower and how much torque you're max rpm you're looking for also

dspad 10-12-2016 12:04 PM

How far below the bottom of the boat is your outdrive

dspad 10-12-2016 08:52 PM

Can you send or post a pic I see you have a super charger thinking of a 250 want to see how close it is to the hatch and the front bulk head


Originally Posted by jtbooten (Post 4490247)
How many RPMs?
Stock 1.5 XR drive.
I'm right at 600 myself. Same prop. 28 pitch. 74 gps half tank and 4 people last weekend. 79 today by myself and 20 gallons 5100 RPMs.

http://i37.photobucket.com/albums/e6...psp4l7viw4.jpg



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