need help, 27 fever top end speed.
06-09-2008, 01:45 PM
#1
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need help, 27 fever top end speed.
hello, my friend J.C. has a 1994 27 fever with a 500 efi and a 2'' sm shorty. the best that we've seen on top end is 66.2 mph. he went from a standard bravo to a 3" shorty but had to put an inch spacer in it. still very hard to get on plane. currently running a 24 4 blade bravo at 5000-5100 rpms. what can i expect from this strait bottom boat and what set ups are you running? this seems a little slow to me, any help would be great, thanks in advance.
06-09-2008, 07:51 PM
#3
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The prop slip is around 11% which seems fine.
How many hrs on the motor?
The boat should run abround 70mph with HP500.
I get 71mph @ 5300rpm out of my -93 with a carb HP500 and 14 1/5 24 4 blade March.
How many hrs on the motor?
The boat should run abround 70mph with HP500.
I get 71mph @ 5300rpm out of my -93 with a carb HP500 and 14 1/5 24 4 blade March.
06-09-2008, 09:13 PM
#4
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the boat is new to him but previous owner says the motor was put together last year. the owner never gave specifics on the motor, just stated that it was a fresh 500 efi. just by looking at the motor it looks like it may have started life as a 502 efi 415 and some one put a 500 efi unit and a nasty cam in it. with the standard length bravo we were only seeing 45 4600 rpms. with the shorty it's around 5100 now. 70's would be nice.
Racer
06-10-2008, 12:55 PM
#6
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hello, my friend J.C. has a 1994 27 fever with a 500 efi and a 2'' sm shorty. the best that we've seen on top end is 66.2 mph. he went from a standard bravo to a 3" shorty but had to put an inch spacer in it. still very hard to get on plane. currently running a 24 4 blade bravo at 5000-5100 rpms. what can i expect from this strait bottom boat and what set ups are you running? this seems a little slow to me, any help would be great, thanks in advance.
06-11-2008, 10:33 AM
#7
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Sounds like your #'s are right for a 415hp 502mpi.
Here are some basice #'s for a 27 w/ 500efi, 17.5" X-DIM 25 Hydro, should put you at 72-74mph 5300rpms
Sounds to me you need tho get rpms up!
WILL
Here are some basice #'s for a 27 w/ 500efi, 17.5" X-DIM 25 Hydro, should put you at 72-74mph 5300rpms
Sounds to me you need tho get rpms up!
WILL
06-18-2008, 08:50 PM
#8
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thanks for the help guys. yes, i did try a hydro 24 with out a diffuser ring and had a hard time getting on plane only improved 1 mph 67.4. also went with a 25 3 and couldn't get it on plane, (5000 rpm).
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