Exhaust Tips
 

Has anyone replaced there original exhaust tips (with the built-in mufflers) with tips without the mufflers?? If so what kind of sound difference did you notice? I’d like to gain a little sound running above water.

Re: Exhaust Tips
 

Yep. I removed the muffled Corsa tips and installed the non-muffled ones. Much better sound! Before there wasn't much difference between silent choice on or off at low rpms. Now there is a big difference. I likey. :cool:

Re: Exhaust Tips
 

I did too. Let me know if you want specific details. I know there are other bored (board Members, lots of threads on subject) who could do the same. I liked the results as well because it offsets the muffling of the built in swim platform.

Cheers,

Marc

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By the way,if there is no PQ rally this year, I will personally organize it. Too much fun last year to let it go. Volunteers welcome. [email protected]

Re: Exhaust Tips
 

Marc sound good on the Rally. I had been thinking the same thing. I'd be in for helping out. If thinks happen like they should in the next week or two with hope PQ will be heading it up and top last years. We were bump as we were running a little late in arriving and everyone had just hit the bay as we got to the ramp. And then of course the storm after the run really didn't give us much time to meet people. But all in all was a good time.

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Hey Marc, I would like to help out, but my time is somewhat limited. But I would like to do what I can.

Im glad you started this thread and have steped up to chair this rally, well done :drink:

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The only thing I would like to see is try to have it on the west side of the state again since that would be middle ground. I hope to be able to make it this year :drink: Have you thought about a date yet? Keep us informed. I help if I can.


Rich.

Re: Exhaust Tips
 

I WOULD LIKE A PLAY BE PLAY IF YOU COULD. I WANT TO REMOVE MINE AS WELL. WITH THE SILENT CHOICE WHO NEEDS MUFFLERS? DID YOU HAVE ANY PROBLEMS OR THINGS YOU RAN INTO THAT WOULD HELP?

Re: Exhaust Tips
 

Simple procedure. Loosen the hose clamps on the exhaust pipes, then just unbolt the exhaust tips from the inside and they come right off. You will need someone to push the replacement tips on from the outside while you bolt them up on the inside. Retighten hose clamps. Done!

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I changed out the tips on my last PQ due to the inside flappers burning out. Tough part as I recall was getting the old ones off. Looks like I'll order up a new set.

Re: Exhaust Tips
 

True. I should not have said they come right off. Breaking them loose was far more work than sliding the new ones in. :rolleyes:

Re: Exhaust Tips
 

I had it done about 6 years ago when I added silent choice. The combination of silent choice and non muffler-ed exhaust tips is definitely the best of both worlds. I would think you might use some type of marine silicone on the inside flange of the new tip to prevent water damage to the transom.

Re: Exhaust Tips
 

I am making plans now to replace my Corsa Muffler tips with Silent Choice and non-muffled tips. Has there been any discussion about internal vs external flappers? Internal looks better, for sure. External looks to be easier to repair.

Another question, anyone remove their turbolator inserts in the manifold risers? Any reason not to remove this restriction (other than warranty concerns)?

Re: Exhaust Tips
 

When did they put such a thing in the riser? Would my 97 454 mag efi have them?

I prefer the inner flapps myself.

Re: Exhaust Tips
 

Hey Dave,
From what I hear it is not a good idea to remove the Turbolator. They burn off the water before allowing to drop back down into the manifolds after shutting your engines off. Eventually the water may get into your engine. Not worth the few pony's you may gain.
Jamie

Re: Exhaust Tips
 

i think this is what they are talking about. am i right?

Re: Exhaust Tips
 

Thats the inner flapper on the tip.

Re: Exhaust Tips
 

http://www.cpperformance.com/detail.aspx?ID=2726

Mates between the Exhaust riser and manifold.

Re: Exhaust Tips
 

Thanks for all of the info. Sounds like inner flapper is the preferred choice and I :D probably should leave the turbolator alone.

Re: Exhaust Tips
 

One thing to consider is that not all Straight thrus have a matching bolt pattern with the Corsa mufflers possibly causing you to plug and redrill. My corsa's were bonded and sealed with 5200 which made them a royal ***** to get off. Had to use heat and make a puller to get them off without damaging the transom gelcoat. Since I found out the hard way that my bolt patterns did not match I hardwood and epoxy plugged the old holes and redrilled. I used Eddie marine tips with internal no burn flappers. These would appear to let water go bye as they are not the more restrictive counterweighted butterfly types so I opted to also leave the external flappers on as added protection especially while beached in channels where the transom is exposed to passing boat wake (probably anal). A very small gain was realized but it sounds better. You will need more stereo wattage however.

As to the rally, I am hoping the new PQ guys would be the first choice but if not, being a Grand Haven resident I would hope the West side in August would be a starting point.

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Well I just picked up a new set of tips and as soon as the weather warms I'll pull the old ones off and make the exchange. Just wondering did anyone else run into as much trouble as Mig in getting the old corsa tips off?

Re: Exhaust Tips
 

The Corsa mufflers on my 340 matched up perfectly with Stainless marine tips that I installed. When I sold the boat, I swapped out Vyper340's Corsa tips and gave him my Stainless Marine Tips - again a perfect match.
Both boats did not have any caulk (nor did Macklins) instead PQ used a nice silicone gasket. Made for a tidy install.

Re: Exhaust Tips
 

I just changed mine out this weekend with some Eddie Marine tips and the holes were the same. took me about 1 hour for both.
It was pretty easy. There were 2 hose clamps on the inside and 3 bolts from the mufflers.(one on bottom and 1 @ 10 o' clock and 1 @ 2 o'clock) I unbolted the the nuts, removed the washers. Keep them if you get Eddie Marine tips because the washers they send are too small. Also make sure you get 3" bolts with the new tips. I did not use the gasket that came with the mufflers because they were in bad shape. I laid down a healthy bead of silicone and fingered it all the way around nice and even like. As I tightened them down it oozed and I wiped off the extra! re connected the hose clamps and walla!
Next step hook up some water and fire it up!

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i found this while searching for clues:




I will see if I can intelligently answer the questions and put a final light on the Mercury "Turbulator" plate in the 496 engines. First, all the 496's I have seen or checked seem to have the plate irregardless of year of manufacturer. Thats not to say Mercury has or will not change on certain production years and models. As I understand from Mercury engineers themselves, these plates wetre designed to catch small amounts of exhaust moisture, not reversion!, no plate will stop reversion, reversion is a function of cam timing and overlap and it does not exist per say in the 496 Mag or HO engines. Exhaust moisture, depending on the individual boat , exhaust design and exhaust system exit heights coupled with silent choice or otherwise can sometimes be a greater water generator issue in some hulls more than others. The plate was designed to provide a substantial shelf to catch small amounts of actual water and provide a place where exhaust heat could cook it off and keep it from entering the exhaust manifold and possibly getting to the exhaust valve, especially after the motor is shut off. The idea is not a bad one but the execution was not the best. first the inside diameter of this hole in the "turbulator is just over 2-1/4" inches in size. This does not seem like a serious dimension, however you need to understand that the inside diameter of the Mercury sweep riser is over 3" and about 3-1/2" at the location of the "turbulator" plate. This small opening becomes a substantial restriction to the exhaust gas flow at higher rpms, especially under full WOT periods. Remember this is a fairly high horsepower 500 cubic inch engine! We have done actual flow bench runs on the manifold and riser, with and without the turbulator plate and I can personaly tell you that removing the plate has a considerable affect on how much exhaust gas the manifold & riser plate can flow at what would be higher rpms and throttle positions. I wish the manifold designer-Gil? had just designed a little more down angle to the exhaust port entrance at the cylinder head flange and any need for the turbulator plate would have been completetly eliminated. The low pocket this would have created would cook off small amounts of water., but what the heck, I didn't design the manifold, and it's really not a half bad part. This manifold is every bit a good as a normal aftermarket cast manifold such as Stainless Marine, Gil, Eddie or Imco standard . If you have a boat that has a s-pipe drop tube between the riser na d the transom exit tip or your boat has a moderate drop between the riser exit height and the transom exit you should be able to eliminate the plate and get the horsepower benefits accordingly. If your transom exit height is close to the bottom of the Merc riser height, you have a silent choice system which you keep set closed for through the prop exit a lot or you are one of these boaters with a below the water line tip exit, swim platform cap over the tip and you back down hard a lot of the time, then you may be better off keeping the turbulator plates installed. If you can safefly remove them, especially with our BIGPOWER kit you will gain power at higher rpms. Remember any impediment to air flow into or out of a high performance large cubic inch engine, especially in marine use will have a negative affect on performance. Otherwise no one would need to purchase marine header or high performance marine manifold systems. I hope this clears the air and clarifies the issue. "Will the real Turbulator plate please stand up!"

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its from Raylar

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i also found this pic

item #19

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Just Wondering If Replacing My Quick And Quiet Tips To Open Tips Will Give Me Any Benefits Besides Sound (h.p. Or Torque)? I Have Stock 310 Mpi's Is It A Waste Of Time And Money? The Quick And Quiet Is Just That Quiet. I Would Love To Have More Sound With Out Getting Any Tickets. Will I Have Any Lean Conditions With Changing Tips? Thanks

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Ya know I don't know if I got any horsepower of torque gain...maybe a little but not like 50HP. If any I would say 20-25HP. The sound factor was plenty for me although and for the $150 it was worth every bit.

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Sounds like Mig was the only one trouble getting his old tips off. What year boats do you guys have? I believe my tips have some type of gasket. Being the boats in storage I can't get to it to confirm but based on some photo's I took I can see a black ring around the base. My new tips should be in Friday. Lets see I've now got new tabs, billet steering column, speakers and exhaust tips install. Waiting for spring is better than Christmas!

Re: Exhaust Tips
 

Mine is an '02 and I had black gaskets.
It sounds like you have a lot to when the snow melts :D :D :D

I am picking up my stereo in the morning:

4 each - JL Audio 10W3v2
5 pair - JL Audio XR650-CXi mids and highs
1 - JL Audio 1000/1 Class D mono amp
2 - JL Audio 300/2 for the mids and highs
:D :D :D
and the boat goes to the install shop on Monday!!!
:D :D :D


I will post progress pictures!


Here are the amp and battery racks!

4 batteries for the stereo, 1 for the house, and 1 for the motor.

Re: Exhaust Tips
 

I wish they used silicone for mine. Kinda indicates that they really had no build standard when putting boats together. Whatever the installer felt like using. 5200 is extremely permanent. However, even with the ***** of getting the muflers off, I still think the transom should be extremely well sealed and some silicones are really not up to the task. My Corsa mufflers had an extremely large outside diameter with studs going into the transom from the outside.

Re: Exhaust Tips
 

this is something I have been wanting to do also, are there any pics out there of the tips you guys are using? Has anyone gutted the tips you have now? I assume what I see up in the tips I have now are the mufflers, right? And just where is the turbulator plate at?

Re: Exhaust Tips
 

Yea, I would check into it a little closer. I think my mufflers were a larger diameter than some of the ones removed by other board members. I remember seeing a more compact muffler on 496 installs. I can't imagine any 4" tip flange coming close to the diameter of the corsas I removed. You would need over an 1" flashing to get the bolt holes close. 380 your welcome to my shop to look at what I have done.

Re: Exhaust Tips
 

look at post number 26


item number 19

Re: Exhaust Tips
 

OK here is the low down on my install. The mufflers I took off had a total outside diameter of 5 1/2" see picture 1



and the new tips from Eddie Marine were 4"....BUT they have a 3/4" flange all the way around making the overall 6" see picture 2




and as for what is inside see the rest of the pics on the next post.


I hope this helps.

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ok pictures of the mufflers

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I hope this helps

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Your excellent photo journal work has confirmed my suspicion that the mufflers on my install were much larger. I can not measure them now as I have since sold them but the outside diameter was at least 7" or more. After looking on the corsa website the mufflers used for 500HP and above are quite a bit larger. I probably should have just guted my mufflers rather than do transom surgery but I still would have had to pull them.

Re: Exhaust Tips
 

thanks for the info littlejake :D

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Does anyone have any knowledge of the Corsa ASR Tunable exhaust tips?... just wondering if their tips are like the Supertrapp motorcycle exhaust system that you adjust the sound by the number of discs inside the muffler...