1987 Nova 3
#1
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Hey guys just got a Nova 3 and love it so far, I know its a big heavy boat but I needed something for the wife that rode smooth and took well to the bay, plus had room for her and I and are to little boys. I think it has the wrong props on her though as it is into the 5400 rpm range, it has twin 350s with alpha 1's with 19p props, I am looking at adding thru hull exhaust and maybe some better air filters. Right now at pushing it hard for a little it ran 52.8mph on GPS so I am wondering what props should be on this boat maybe 21p or 23p I am guessing. Any help would be great. Thanks guys.
#2
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From: westville, NJ
hi. welcome aboard. i have your boat's twin brother. i am currently trying to get it back together. i owned it 6 years ago and bought it back this winter. he ran good with 23 mirage plus props but . i currently have a 21 mirage, 23 laser, 23 mirage and a 23 mirage plus. at 20 inches of pitch, each 2 inch increment is approx 10%. 5400 now. go to 21 and you will be around 4900. 23 and will be 4400 or so. what bay? what you really want to do is try a couple of diff props before buying. there are a lot of guys on here with largish prop collections. with wifey and kids you might be happiest with 21's. at least SHE might. the guy i sold the boat to (and bought it back from) says he saw 63 mph on gps at 5300 rpm's. motors have a little work done to them now. part of me wants to try 25's. part of me wants to put 4.3 v6's in it.
#3
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why would you want to put 4.3's in it. I am trying to hang with my friends but they all run 24-26 footers with BBC and have lots of work running 65-75, I know the 29 foot of this Nova isnt gonna get there unless I dump tons into these motors, I just gonna get some K&N filters and some thru hulls so it sounds fast lol.....I know it needs props but just not sure what ones as I know that the drives are not counter rotation either.
#5
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I have 23p Mirage's on my 87 Nova 3 and have hit 68mph @ 4600rpm with 5 guys and full tank of fuel. Previous owner says he hit 73-74 on GPS with just him and 1/4 tank of fuel. But my motors are fresh 383's dyno'ed at 450hp each and are counter rotating drives also. I would think either 21 or 23p would be good for your boat. I personally would be nervous about running those motors at 5400rpm for very long. May not be the fastest hull in the water but let me tell you on days with a 3-4' chop I sure love the boat. One of the best looking 80's hulls IMO.
Last edited by jck3120; 05-30-2012 at 11:11 AM.
#6
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Joined: Dec 2010
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From: Arizona
21p mirage plus will work best for you. Stock 350 top ends are not made to spin much more then 4800rpms in an efficient manner.
I am running 23p mirage plus at about 73-74mph with built sbc's at 5400-5500rpms. I am thinking about trying some 25p to see what happens but my motors are happiest higer in the rpms. If the 25p pull me down too much, a call to BBlades will get me a labbed set of 25's then I should be about 78mph. Then when thats boring time for forced induction!
The Nova's are great boats for familys and with a little work can move out pretty well. Best part of these boats is they look great, ride smooth and there are not many of them left.
I am running 23p mirage plus at about 73-74mph with built sbc's at 5400-5500rpms. I am thinking about trying some 25p to see what happens but my motors are happiest higer in the rpms. If the 25p pull me down too much, a call to BBlades will get me a labbed set of 25's then I should be about 78mph. Then when thats boring time for forced induction!
The Nova's are great boats for familys and with a little work can move out pretty well. Best part of these boats is they look great, ride smooth and there are not many of them left.
#7
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Joined: Feb 2012
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From: westville, NJ
if only they spaced the motors a couple inches farther apart. a pair of alum head 50s's and these not-so-little buggers would be able to use the step in the hull and the steve stepp-style pad on the stern!!!
#9
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Joined: Dec 2002
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From: cincinnati, ohio
I had the same boat boat with 13.75" x 21P props(both right hand props) and ran low 60's @ 4800-4900 RPM's with stock engines. Fun boat! FYI - I did add a tie bar and it seemed to handle better. Have Fun!




