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Gen 2`s out Gen 3 in

Old 01-01-2007, 02:23 AM
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Default Re: Gen 2`s out Gen 3 in

Originally Posted by MIAMIBOYS
Brian I had a set of CMI`s, however, when I was proven on the dyno that even my Gen 2`s made more hp I was convinced. I will remove my motor after tomorrow`s day on the water to dyno the motor with the Gen 3`s.
I would love to hear what the power difference is between gen3's and good cmi's. I'm using the gen 3's,they are ugly and big but they will start looking better to me if I knew they are making more power than cmi's ,Smitty
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Old 01-01-2007, 06:28 PM
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Default Re: Gen 2`s out Gen 3 in

Im prety sure in the hp range we are about 75 from CMIs
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Old 01-01-2007, 11:24 PM
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Default Re: Gen 2`s out Gen 3 in

Went out today for the last time with the Gen 2`s, it was a gorgeous 78 degrees here in sunny Miami with 2 footers.
Attached Thumbnails Gen 2`s out Gen 3 in-mvc-005s.jpg   Gen 2`s out Gen 3 in-mvc-011s.jpg   Gen 2`s out Gen 3 in-mvc-008s.jpg  


Last edited by MIAMIBOYZ; 01-03-2007 at 11:54 PM.
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Old 01-02-2007, 12:02 AM
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Default Re: Gen 2`s out Gen 3 in

So have any of you guys bolted on gen 3's after removing cmi's and actually saw a speed increase? My motor was dynoed with cmi's at crockett's and then I installed it in my boat with stainless marine 3's. When I tested the afr as installed on the water my air fuel ratio's had went from the 11.2-11.7 it showed on the dyno to 10-10.5 so I figured they might be more restrictive even though they are humungous. I also run ggb mufflers but they actually make boat idle better and made zero difference in top end rpm's/speed,Smitty

Last edited by articfriends; 01-02-2007 at 12:05 AM.
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Old 01-02-2007, 06:22 AM
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Default Re: Gen 2`s out Gen 3 in

Originally Posted by MIAMIBOYS
Went out today for the last time with the Gen 2`s, it was a gorgeous 78 degrees here in sunny Miami with 2 footers.
Well I wake up to 32* and read this and I don't have an engine in my boat
my time is comming
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Old 01-02-2007, 06:32 PM
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Default Re: Gen 2`s out Gen 3 in

Ok with the CMIs 6 lb boost boat ran 92 mph steped up in pulley 4 teeth 9 lb boost seen no mph increase or rpm gain ,went to bigger camshaft . Crane 741 236-246 to 262-272 picked up nothing . So in my small brain all is left is exhaust ??
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Old 01-02-2007, 08:11 PM
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Default Re: Gen 2`s out Gen 3 in

b-stubb,
is your 28 a full cabin? I noticed it looked like the transom was notched. What is the upper drive unit? Lastly what kinda pwr are you making?
Sorry for all the questions. Just trying to learn something.
Thanks,
Tom
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Old 01-02-2007, 08:16 PM
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Default Re: Gen 2`s out Gen 3 in

950 hp full cabin notched transom xr upper imco lower 92 mph at 5950 30p 5 blade hydro
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Old 01-02-2007, 08:17 PM
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Default Re: Gen 2`s out Gen 3 in

Im feeling everyone will be suprized how much hp it takes to push these boats we will see .
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Old 01-03-2007, 06:25 AM
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Default Re: Gen 2`s out Gen 3 in

It seems like I read about it all the time a 28- 32 foot boat running 80mph+ w/ 600hp
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