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07-30-2004, 10:42 AM
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#1
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Platinum Member
 Platinum Member
Join Date: Dec 2002
Location: loto
Posts: 211
N/A
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Exhaust for supercharged motors
whats the best exhaust choice for supercharged engines? size,type diameter
tail pipes sizes??
thanks
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07-30-2004, 11:00 AM
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#2
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Official OSO boat whore
 Charter Member
Join Date: Oct 2000
Location: Mequon, WI
Posts: 6,123
8' row boat
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Re: Exhaust for supercharged motors
What kind of engine? Mild? Hp525? Wild? Sterlling?
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07-30-2004, 12:06 PM
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#3
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Platinum Member
Platinum Member
Join Date: Dec 2002
Location: loto
Posts: 211
N/A
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Re: Exhaust for supercharged motors
509 Or 540's 700-800 Hp
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07-30-2004, 12:57 PM
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#4
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Official OSO boat whore
Charter Member
Join Date: Oct 2000
Location: Mequon, WI
Posts: 6,123
8' row boat
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Re: Exhaust for supercharged motors
Cmi elbow tops will be a good choice.
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07-30-2004, 01:00 PM
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#5
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Platinum Member
Platinum Member
Join Date: Jun 2004
Location: Frankenmuth
Posts: 4,075
272 baja/99 mph so far/1000 plus hp
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Re: Exhaust for supercharged motors
I'm using lightning headers w/silent choice option-540-9 psi boost,approx 700-750 hp. The headers really didn't give it 400-600 rpm's like they claimed so i imagine the cmi's may be better but it works,Smitty
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07-30-2004, 01:46 PM
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#6
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Registered
Join Date: Jan 2002
Location: Cincinnati, Oh
Posts: 1,145
38 Fountain SC
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Re: Exhaust for supercharged motors
Quote:
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Originally Posted by Cord
Cmi elbow tops will be a good choice.
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I've got them on mine but with dry stacks.
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07-30-2004, 02:47 PM
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#7
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Registered
Join Date: Jun 2003
Location: Atlanta, GA
Posts: 220
2000 Campion Chase 910
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Re: Exhaust for supercharged motors
CMI elbow tops don't flow better than Lightning headers. What I noticed after installing Lightning headers on a Whippled 454 mag was no increase in rpm's...but a loss on boost pressure 2 psi to be exact...from 7 to 5, yet no decrease in speed. Put a smaller pulley on to get back to 7psi and got the resulant speed increase, around 40-50hp estimate. So even tho Whipple says there is no benefit from switching out the stock exhaust because the supercharger will force it out anyway, I saw that freeing up the exhaust will result in the engine working easier and thus will make more power.
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07-31-2004, 09:34 AM
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#8
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Registered
Join Date: Mar 2004
Location: Miami, FL
Posts: 627
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Re: Exhaust for supercharged motors
CMI AND OTHER TUBE TYPE EXHAUST ARE THE MOST ATTRACTIVE LOOKING HANDS DOWN BUT FOR LONG LIFE EXPECTANCY I LOOK AT STAINLESS MARINE DOMINATORS I DON'T KNOW OF ANY OTHER EXHAUST THAT WILL OUT LAST THEM AND I HAVE DONE BACK TO BACK TEST ON THE DYNO WITH EVEN LONG TUBE CUSTOMS AND THE POWER IS RIGHT THEIR I HAVE FOUND THAT THE 4.5 TAILPIPES HAVE MADE MORE POWER AND TORQUE ON EVERYTHING WE BUILD UP TO 1100HP. I BELIEVE JERRY OFFERS A 3 YEAR WARRANTY ON THE EXHAUST SYSTEM ALSO DO NOT QUOTE ME ON THAT I'M NOT SURE IF THATS THE RIGHT WARRANTY CALL STAINLESS MARINE FOR THEIR WARRANTY THEY NORMALLY HAVE THEM ON THE SHELF. HOPE TO SHINE SOME LIGHT FOR YOU LAZ MESA WWW.MESABALANCING.COM
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07-31-2004, 10:00 AM
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#9
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Platinum Member
Platinum Member
Join Date: Oct 2002
Location: Fairport,NY
Posts: 747
1998 Hustler Slingshot
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Re: Exhaust for supercharged motors
Too Old and Mesa Balancing both make good points. I've been running the E top race setup on my blown 572's with no complaints. Also running CMI's switchable mufflers though the local authorities tell me their instruments say I'm slightly illegal in New York State with the mufflers on. I don't have the CMI info in front of me, but when I got mine, they had a special switchable muffler for big inch,blower applications. As I recall, the flappers,pivots etc were stainless. For what it's worth.--Lou
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07-31-2004, 10:25 AM
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#10
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McManus Superboats!
Platinum Member
Join Date: Sep 2003
Location: Middletown, NJ
Posts: 5,947
1998 McManus Comanche 36
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Re: Exhaust for supercharged motors
Gil Offshore exhaust has given me outstanding durability.
Tubular exhaust has a tendancy to crack on the internal pipe at the exhaust flange. Water leaks into the supercharged engine and a catastrophe occurs. Points to consider....Hot exhaust, cool water in the pipes, the buzz of the engine vibrations, the weight of the header fully charged with water is a recipe for hydro-lock.
Expensive and disheartening when it occurs.
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