Best mufflers that dont take HP!!!
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Best mufflers that dont take HP!!!

  1. #1
    Senior Member Skydog's Avatar
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    Default Best mufflers that dont take HP!!!

    Hey guys looking for some new mufflers, i have 5" tails coming out, 600big block with 1071 blower.

    Thank u Skydog

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    Is it Summer Yet?! SoCalKev's Avatar
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    Sanger Super jet in Progress

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    Senior Member smitt19's Avatar
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    Default mufflers

    I was real happy with the Zoomer mufflers they said they won a shoot out for lowest power lost in power boat I believe good guy to deal with as well

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    Default For what it is worth on mufflers relative to power

    Kind Sirs,

    The first 1% in power LOSS happens with about 1" Mercury (Hg) back pressure in the exhaust. That is roughly 13.6"H2O.

    As far as the noise level: I can't hear well, so it won't bother me.
    I suspect the guy with the dB meter would have a different opinion.

    Regards,
    IG

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    Senior Member Ahsumtoy's Avatar
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    I'm using Rex's mufflers on my 26 Daytona. I have a 572 with a 1071 and didn't notice any affect on the performance. It did quite it down though.


    Edit: Note to Rex, I tried to find your mufflers on your website and couldn't. Are you still making them?
    Last edited by Ahsumtoy; 09-02-2010 at 06:46 AM.

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    Senior Member brgrcru's Avatar
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    Quote Originally Posted by Ahsumtoy View Post
    I'm using Rex's mufflers on my 26 Daytona. I have a 572 with a 1071 and didn't notice any affect on the performance. It did quite it down though.


    Edit: Note to Rex, I tried to find your mufflers on your website and couldn't. Are you still making them?
    I think a picture with all your boats lined up in a row is due by now. So we can judge which one we like best.

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    My local boat and engine shop tried to get me a set of the new Borla's this spring, but the guy Alexi that Borla sent us to was impossible to deal with. They tried for at least two weeks to get them, but he was so unpleasant to talk to and so unwilling to give a delivery date better than "a month or so, maybe", that they just asked me to please get something else.

    I still would like to find out if they are any good...... Are they actually for sale now?
    WARNING!! Contents may contain sarcasm and/or satire, small children and pregnant women should exercise extreme caution.

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    A couple years ago I did back to back dyno tests on a set of GGB mufflers on a 516" 600 hp engine and saw NO hp loss whatsoever....
    There was even a slight gain in midrange torque.....






    GREAT people to deal with and they'll do "custom" work as well...






    Doug
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    Last edited by Boatally Insane; 09-02-2010 at 10:27 AM.

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    New here Beer:30's Avatar
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    Mufflers and NOT losing HP don't go in the same sentence. Except for just now.

    Noise and HP go hand-in-hand. They all reduce noise and sure, some knock down more HP than others. It all depends on if you "feel" the HP loss or not.

    Typically, in a well tuned carbed motor, you will need to lean the jets a size or two. The mufflers will fatten up the mixture a bit.

    Nothing is free - if you want it quieter, you have to give up some power. Uncorked headers are the ticket for drag-racing, right? Zoomie headers are the top fuel and drag boat choice, right? So, ultimately, those are you maximum HP options. Anything quieter starts to drop HP. Not necessarily TQ though.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Quote Originally Posted by Beer:30 View Post
    Mufflers and NOT losing HP don't go in the same sentence. Except for just now.

    Noise and HP go hand-in-hand. They all reduce noise and sure, some knock down more HP than others. It all depends on if you "feel" the HP loss or not.

    Typically, in a well tuned carbed motor, you will need to lean the jets a size or two. The mufflers will fatten up the mixture a bit.

    Nothing is free - if you want it quieter, you have to give up some power. Uncorked headers are the ticket for drag-racing, right? Zoomie headers are the top fuel and drag boat choice, right? So, ultimately, those are you maximum HP options. Anything quieter starts to drop HP. Not necessarily TQ though.
    X2, What he said!

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    Quote Originally Posted by Beer:30 View Post
    Mufflers and NOT losing HP don't go in the same sentence. Except for just now.

    Noise and HP go hand-in-hand. They all reduce noise and sure, some knock down more HP than others. It all depends on if you "feel" the HP loss or not.

    Typically, in a well tuned carbed motor, you will need to lean the jets a size or two. The mufflers will fatten up the mixture a bit.

    Nothing is free - if you want it quieter, you have to give up some power. Uncorked headers are the ticket for drag-racing, right? Zoomie headers are the top fuel and drag boat choice, right? So, ultimately, those are you maximum HP options. Anything quieter starts to drop HP. Not necessarily TQ though.
    Based upon the prop changes after the muffler installation, my engine builder estimates that I lost 40 hp of my original 575. We went with something called a Mega-muffler, about 10" long with thick rubber flappers over the tips. The boat is a family cruiser and now we can sit and chat without shouting at each other at 3000 RPM. On Powell we run for hours at at time and it's nice not to have my ears ringing at the end of a 120 mile day. The loudest noise at low cruise is from the water, but it still makes a nice rumble when it gets over 4000 RPM.
    Last edited by Westfield 11; 09-04-2010 at 09:37 AM.
    WARNING!! Contents may contain sarcasm and/or satire, small children and pregnant women should exercise extreme caution.

  15. #13
    Senior Member Uncle Dave's Avatar
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    Quote Originally Posted by smitt19 View Post
    I was real happy with the Zoomer mufflers they said they won a shoot out for lowest power lost in power boat I believe good guy to deal with as well
    Correct the zoomers DID win a comprehensive shootout comparing performance vs noise they are superb.

    They seemingly do NOT win the shootout for a lasting finish.

    Nice product, I question the grade of steel they are using though the finish is VERY difficult to keep up.

    Im going to try metalwax.


    Uncle Dave
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    Jackwagon Patrolman Rexone's Avatar
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    Quote Originally Posted by Ahsumtoy View Post
    I'm using Rex's mufflers on my 26 Daytona. I have a 572 with a 1071 and didn't notice any affect on the performance. It did quite it down though.


    Edit: Note to Rex, I tried to find your mufflers on your website and couldn't. Are you still making them?

    No, I stopped producing the PowerSilencer™ due to their cost. With all the lower priced muffs that came on the market we weren't selling many. There's really no way build the design cheaper without going to China so I shelved it. I was not going to cut corners and build a cheap piece of crap. I have a lot of parts and may make some more if and when the economy improves down the road. I only need a couple components to build about 40-50 sets I believe. It was a major product for us for a couple years and we built several hundred sets.

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