SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: 2savage4you on July 24, 2009, 12:35:30 PM

Title: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 12:35:30 PM
I might need to cut down my slip in mufflers to fit a set of headers that have been cut aswell.. Collectors were shortened.

Can any one see any problem with this ?

I think a chop saw at the muffler shop and a tack weld will do ? any cons with a shortened muffling device, Im trying to stay legal and i was told as long as they see a "muffling device" im cool............
Title: Re: Cutting down mufflers
Post by: IRRebel on July 24, 2009, 12:39:31 PM
Whatsa "muffling device"?


(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FV-Drive%2FP7200063.jpg&hash=b7957eca46479f59135cfeb09d47919f71fce065)

(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi673.photobucket.com%2Falbums%2Fvv95%2FIrrebel%2FV-Drive%2FP7200062.jpg&hash=fea7f97f5917be275b7a1e5602692864ad2aded6)

Ray
Title: Re: Cutting down mufflers
Post by: OC2Vegas on July 24, 2009, 12:41:41 PM
Subtle Ray, Very Subtle!  ;D
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 12:42:58 PM
Not the answer im looking for ::)
Title: Re: Cutting down mufflers
Post by: OC2Vegas on July 24, 2009, 12:46:31 PM
you might fool some of the cops with the "I see a muffler" but your not going to fool all of them. If your trying to stay legal, then be legal not just the appearance of legal.
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 12:51:03 PM
you might fool some of the cops with the "I see a muffler" but your not going to fool all of them. If your trying to stay legal, then be legal not just the appearance of legal.

Ok , i can see where this is going to go...........

Im not trying to "FOOL" anybody i was just repeating what i was told by the Nevada game and fish water cops........ the muffler is like 8"s long , im probably only need to cut off 3"......

Not to big of a diff i think ???
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 12:56:03 PM
1 min 10 sec is the ones im talking about.......


[yt=425,350]http://www.youtube.com/watch?v=-jlNiRdKM9Q[/yt]
Title: Re: Cutting down mufflers
Post by: OC2Vegas on July 24, 2009, 01:05:17 PM
Ok , i can see where this is going to go...........

Im not trying to "FOOL" anybody i was just repeating what i was told by the Nevada game and fish water cops........ the muffler is like 8"s long , im probably only need to cut off 3"......

Not to big of a diff i think ???

I thought you meant cutting it way down, if the water cops dont care then by all means cut away!
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 01:15:34 PM
I thought you meant cutting it way down, if the water cops dont care then by all means cut away!

Its not about the water cops!!!!!

Im talking will it affect performance at all by bringing the muffler closer to the collector ???

Im sure it will be fine, but before i buy another set of headers i want to feel good  about it :sly:

Omar , Glenn, Ralph , Terry , Tom where you guys at ???
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 01:30:32 PM
Ok these are the ones i have, but after seeing this i think cutting them would be a waist....
http://www.cpperformance.com/detail.aspx?ID=352

But i bet these would fit right in there.
http://www.cpperformance.com/detail.aspx?ID=354

So never mind im not cutting them , i have another option :sly:
Title: Re: Cutting down mufflers
Post by: pw_Tony on July 24, 2009, 01:38:46 PM
Ok these are the ones i have, but after seeing this i think cutting them would be a waist....
http://www.cpperformance.com/detail.aspx?ID=352

But i bet these would fit right in there.
http://www.cpperformance.com/detail.aspx?ID=354

So never mind im not cutting them , i have another option :sly:

I would run the first link. I ran a set for a couple years, totally rotted out and didn't muffle much at all, all the cops cared about was that there was a muffler in general. And it didn't make any MPH gain or loss with them in or out
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 01:49:26 PM
I would run the first link. I ran a set for a couple years, totally rotted out and didn't muffle much at all, all the cops cared about was that there was a muffler in general. And it didn't make any MPH gain or loss with them in or out

And i will if i dont get a set of headers that are cut short.........
Title: Re: Cutting down mufflers
Post by: Ralph Brunt on July 24, 2009, 04:24:25 PM
i have a set of both, and am using the long ones now. if you want to borrow the short ones let me know and i will get them shipped out to ya
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 24, 2009, 04:44:38 PM
i have a set of both, and am using the long ones now. if you want to borrow the short ones let me know and i will get them shipped out to ya

Ralph , thank you :-* If that happens i will give you a call ;)

Im not sure what direction im going just yet, i want to make sure its the right one before i spend the money ......

there is alot to choose from all with pro's and con's and want to get the best deal, sorry if that sounds like im being a cheap ass but at this point i have to be...
Title: Re: Cutting down mufflers
Post by: beerjet on July 24, 2009, 09:47:51 PM
Ok these are the ones i have, but after seeing this i think cutting them would be a waist....
http://www.cpperformance.com/detail.aspx?ID=352
These have a contoured inner louver core for a smooth transition when the exhaust flows through them.
If you start to cut away at it, the inner core will need to have supports welded in them.
Not to mention they actually do work. The "real" bassett HP mufflers have a ring (round Bar) beteen the inner and out cores on the exit side which would make shortening them up "easier" I think.
But i bet these would fit right in there.
http://www.cpperformance.com/detail.aspx?ID=354
So never mind im not cutting them , i have another option :sly:
The header dont know or care where the muffler is in the collector.
One more thing, The shorter the collector , the less torque the headers will make.
8 in collectors are regularly used on high RPM v-drives where the shorter collector promotes higher RPM's , oh and are you gonna run water through them?
Where is alll that water gonna go?
prepare for an all black transome and lots of wiping down with cleaners.
I dont think hardly any of the prop guys with the cut down collectors run wtaer through them.
Lets be honest here , I dont really know sh!t anyways.....

-beerjet-

Title: Re: Cutting down mufflers
Post by: GT Jets on July 24, 2009, 10:14:12 PM
Two words...Shot Guns....


They ore the absolute best on shortened headers, I will sell you some special built and tuneable ones as soon as I find the worthless POS that stole them from me....Of course you may have to pull them out of the guys ass :banghead:

GT
Title: Re: Cutting down mufflers
Post by: propless on July 25, 2009, 12:02:23 AM
Ok these are the ones i have, but after seeing this i think cutting them would be a waist....
http://www.cpperformance.com/detail.aspx?ID=352

But i bet these would fit right in there.
http://www.cpperformance.com/detail.aspx?ID=354

So never mind im not cutting them , i have another option :sly:

 Steve, I ran those short ones for one trip.  Didnt notice much difference in performance compared to running them open.  But they ere loud, try them first.   Borrow Ralphs and try them before spending the money, or let me know and you can borrow mine too. 

 Like the knowledge master (beerjet) said "prepare for an all black transome and lots of wiping down with cleaners".  Mine really isn't that messy, but I have very very little water going to the headers.


 And Ray,
 Put a towel down before you set things on the boat !!!!!   And carefully put those pipes back in there box and send them to me before you hurt yourself.  ;) ;D
Title: Re: Cutting down mufflers
Post by: IRRebel on July 25, 2009, 02:09:52 AM
I know, I was in a big hurry to see them ! :screwy:

There's lotsa stuff here to hurt myself with................. >:D

But they're back in the box now, lol

Ray
Title: Re: Cutting down mufflers
Post by: 2savage4you on July 25, 2009, 10:34:29 AM
These have a contoured inner louver core for a smooth transition when the exhaust flows through them.
If you start to cut away at it, the inner core will need to have supports welded in them.
Not to mention they actually do work. The "real" bassett HP mufflers have a ring (round Bar) beteen the inner and out cores on the exit side which would make shortening them up "easier" I think.The header dont know or care where the muffler is in the collector.
One more thing, The shorter the collector , the less torque the headers will make.
8 in collectors are regularly used on high RPM v-drives where the shorter collector promotes higher RPM's , oh and are you gonna run water through them?
Where is alll that water gonna go?
prepare for an all black transome and lots of wiping down with cleaners.
I dont think hardly any of the prop guys with the cut down collectors run wtaer through them.
Lets be honest here , I dont really know sh!t anyways.....

-beerjet-



Once again Omar,

You bring light to a darkened room........

I love you man :-* :-* :-* well im going to shy away from the short shorty's. Everything  that was said makes total sense and i "of course" was not thinking of that...

I was just thinking of how cool they looked. the ( cool factor ) gets me everytime :banghead:

Steve, I ran those short ones for one trip.  Didnt notice much difference in performance compared to running them open.  But they ere loud, try them first.   Borrow Ralphs and try them before spending the money, or let me know and you can borrow mine too. 

 Like the knowledge master (beerjet) said "prepare for an all black transome and lots of wiping down with cleaners".  Mine really isn't that messy, but I have very very little water going to the headers.

Thanks Jeff.

I think im going to stay with what i have cause they will slide right in the collector on the shorty's. :-*
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