1998 Nautique Straight Pipe |
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1998Nautique
Senior Member Joined: January-26-2006 Location: Canada Status: Offline Points: 190 |
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Posted: June-18-2008 at 8:57pm |
I have a 1998 Nautique GT-40 EFI, has anyone ever put straight pipe on them. Or has an idea how to do it? Any advice is greatly appreciated. Would it sound good coming out a single exhaust pipe.
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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There's some guy here who calls himself TRBenj...I think he found a solution?!!?
As I understand it, this was a single exhaust. |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Man that is a beautiful job...ain't it?
john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Ya Mon! |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Leftover from the honeymoon!? john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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87BFN owner
Grand Poobah Joined: August-25-2006 Location: Saline, MI Status: Offline Points: 2194 |
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If your going to do the work just go duals like Tim did. This is the back of the boat that was shown above.
TRBenj duals |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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Thanks guys.
Im not sure I would recommend the dual exhaust conversion... Its by no means a small undertaking- the cost and time involved are pretty significant. |
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STANG KILLA SS
Groupie Joined: June-15-2008 Status: Offline Points: 81 |
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one thing to consider, any time you remove the mufflers, the loss in backpressure will cause a loss in low end torque.
with the bullet mufflers used on these boats though the loss will be much less than on a car. |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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Not only are the stock mufflers fairly lossless, but prop slippage makes low end torque almost a non-issue. Any Correct Craft should be getting an instant 2500+ RPM when going WOT out of the hole. Modified boats will see more than that, and 1.23 boats should see 3k. Modified 1.23 boats can get 3200-3400, depending on the prop. |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
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what are you talking about
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nates78ski
Platinum Member Joined: January-24-2005 Location: United States Status: Offline Points: 1041 |
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I get a boner every time I see that exhaust...is that normal?
Nate |
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adamt
Gold Member Joined: July-18-2007 Location: Orlando, FL Status: Offline Points: 927 |
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I hear HW suffers from that same problem, but a little more often !!! |
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-Adam
1973 Skier |
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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HW is young enough to have that problem often.
john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
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Adam is just jealous.
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1998Nautique
Senior Member Joined: January-26-2006 Location: Canada Status: Offline Points: 190 |
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Any ideas on how to run it straight. Where do I get the Y Pipe and hose to bypass the muffler?
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Go to your local muffler shop armed with a pocket full of C notes and ask can they do the job?????????
If they fail your question and answer session go to the next one down the street, someone will take your money............ |
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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1998N - I am also thinking of changing to a straight pipe setup, since I am going to install a 'Fresh Air Exhaust' to eliminate CO exposure (a significant issue) while surfing.
Thus now I will effectively have 2 mufflers. I saw these components on JA Chamberlain's site & am headed that direction. elbows I would run exhaust hose from the starboard manifold to an elbow, then hose from the port manifold down to a tee (next in inline). Guys, do you think this would work or create uneven backpressure for one of the banks? Would incresed intake manifold vacuum (at mid range RPM) be a good indcator of performance benefit? |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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he gets a boner and about 12.5 seconds later its gone lol
anyone have crossover pipe in thier exhasust? |
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5698 |
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I have plans for an x pipe, but its not high on the priority list..
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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you ready for a trans yet? i could find you a nice zf630 a, full power forward and full power reverse, with electrics and a trolling valve for the no wake zone
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Love them hitech's. That is one nice clean install TRBenj.
It would be interesting to see if a crossover / balance pipe between the 2 banks produced any power gains. I found in my Aussie 5.4 litre V8 DOHC Ford ute . The best power curve & max HP was with a balance pipe straight after Cat's then into a single 3" pipe. Picture of Xovers I put the following balance pipe in my old ski boat and got better economy and a reduction in exhaust crackle also. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21169 |
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Very interesting. Ill need to do some more reading- can you explain the benefits of an H pipe vs. an X pipe?
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azeus17
Gold Member Joined: August-19-2007 Location: Grand Rapids, M Status: Offline Points: 576 |
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Lewy-
What is the pulley system for in the second picture? |
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Boats:
Current: 02 SANTE Sold: 89 Sport Nautique |
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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TRBenj
I had no room room to put the xover type design in my old ski boat it was only 17'2" including platform so had to settle for the H pipe design. It is all about exhaust scavenging I would think the xover would have advantages but the H pipe design definately helped in my application. Azeus17 The pulley system is for the hand lever operated soft clutch transmission. It basically is a standard clutch & pressure plate system from a car. It uses a modified bell hosing with a bronze clutch fork that is actuated by a hand lever via the pulley system yon can see in the bilge. It is very common in fresh water boats in Aus. Mainly the budget priced boats use this system it is very reliable and inexpensive to repair. It is also a great improvement over the old dog clutch system earlier ski boats used. It does not suit salt water applications that well due to corrosion. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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what would be the benefits of the X exhaust besides having a cool steel X on the bilge???
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Thread jack..sorry...Luciano..was just gonna e-mail you as I hadn't seen you here for awhile. How is the resturant going? And your lady? Been doing much boarding?
Sorry again. john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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I was just reading though the original CC brochures on this site for my 89 Ski. Found some excellent info on the Interflow exhaust which they introduced in that year in the SP package. They claimed a 20% torque improvement with a 10% HP gain & a 6% fuel economy benefit. The only real downfall is the 50% reduction in noise!!!!
They are big gains but it was CC telling the story. I also found out that my 89 is Cranberry not Maroon. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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