engine RPM with 25 mirage plus
#1
engine RPM with 25 mirage plus
Hello,
I have had three different engines in my boat between 25 to 75 hp different. I'm unable to turn the engine over 5k, the engine is a 500hp with a stardard bravo 1 with a 1:5 ratio . The engine has no rev. limiter has good fuel pressure and spark. The timing is set at 34 degrees with a holley 950 Hp which is about a 800cfm. Is this the proper Rpm the engine should be turning or should it be alot more. Jp
I have had three different engines in my boat between 25 to 75 hp different. I'm unable to turn the engine over 5k, the engine is a 500hp with a stardard bravo 1 with a 1:5 ratio . The engine has no rev. limiter has good fuel pressure and spark. The timing is set at 34 degrees with a holley 950 Hp which is about a 800cfm. Is this the proper Rpm the engine should be turning or should it be alot more. Jp
#3
Registered
Hello,
I have had three different engines in my boat between 25 to 75 hp different. I'm unable to turn the engine over 5k, the engine is a 500hp with a stardard bravo 1 with a 1:5 ratio . The engine has no rev. limiter has good fuel pressure and spark. The timing is set at 34 degrees with a holley 950 Hp which is about a 800cfm. Is this the proper Rpm the engine should be turning or should it be alot more. Jp
I have had three different engines in my boat between 25 to 75 hp different. I'm unable to turn the engine over 5k, the engine is a 500hp with a stardard bravo 1 with a 1:5 ratio . The engine has no rev. limiter has good fuel pressure and spark. The timing is set at 34 degrees with a holley 950 Hp which is about a 800cfm. Is this the proper Rpm the engine should be turning or should it be alot more. Jp
Last edited by jeffswav; 06-29-2010 at 09:30 PM.
#6
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Join Date: Sep 2007
Location: Bettendorf, Iowa
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i have kinda got the same thing..... i am running around 570hp. just found out that my 24 bravo 1 is labbed. ( i always wondered why it is so thin) i can turn it 5500 rpms with me and my girlfireind in it and have had it up to 5700 with just me in it and LOW fuel. Anyways. i have gone 74 with the bravo 1 and i have a mirage plus 25 that is new. i cannot turn it above 4900 with 2 people in it. soooo im gonna get a 23 worked on. i need to be running 54-5600 rpm for my peak power. the mirage is good but it is holdimg me back. the mirage performs better overall. it carries the bow well and planes more level. the bravo 1 sends my bow sky high when im planing. but i have a porpouse at around 50mph. overall i am stoked with its performance. i even got 72 with 5 people downriver on gps with the b1. also keep in mind that my boat is like a poker run edition. the cuddy is stripped and has nothing in it. i can get the bow up there and get on top of the water.
if i were you i would try a 23 mirage plus. gain 400rpm. its not about having a big number on the side of the prop. you just go faster with the right prop.
if i were you i would try a 23 mirage plus. gain 400rpm. its not about having a big number on the side of the prop. you just go faster with the right prop.
#9
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Before you do anything, check the accuracy of your tach against a shop tach.