Boating Discussion Thread, who has done the center rise manifold conversion on a 350? do you see results? in Boats; well i just bought the center rise exhaust manifold conversion kit for my merc 350 (260) from go2marine,com. Darren was ...  | | 
Feb-01-2008, 12:35 PM
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#1 | | Captain Fire
Name: Mick Fire Age: 25 Vessel: 24' Skipjack Flybridge Location: Oceanside Job:Corporate Jet Pilot / Aircraft Mechanic Bio: I fly planes and kill fish, what more to life is there?
Posts: 867
|  who has done the center rise manifold conversion on a 350? do you see results?
well i just bought the center rise exhaust manifold conversion kit for my merc 350 (260) from go2marine,com. Darren was a GREAT help! he says that 100% of the people have increased fuel economy, cooling, HP and general performance after the conversion... has anyone done the conversion? whats your take? did you see a performance change? anything? let me know. im curious to see how they work for me... the kit was $859.00 plus god damn $100 in shipping but not bad and its all new shit... ill get them next week and be out there soon! i cant wait...! thanks for the feedback guys! 
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Feb-01-2008, 03:27 PM
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#2 | | Pro Boat Scrubber
Name: Spooker Vessel: 24' Skipjack FB, 19.5' Glastron SE and a ScupperPro TW Location: Agua Hedionda Job:Putting the "i" in Realty and Keeping BD Moderators Honest.
Posts: 5,189
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Are you talking about a Throttle Body Injection conversion?
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Feb-01-2008, 03:34 PM
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#3 | | Captain
Name: mark Age: 47 Vessel: triumph 215 cc Location: oak hills ca. Job:construction
Posts: 4,074
| Re: who has done the center rise manifold conversion on a 350? do you see results?
?
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Feb-01-2008, 03:42 PM
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#4 | | Captain Fire
Name: Mick Fire Age: 25 Vessel: 24' Skipjack Flybridge Location: Oceanside Job:Corporate Jet Pilot / Aircraft Mechanic Bio: I fly planes and kill fish, what more to life is there?
Posts: 867
| Re: who has done the center rise manifold conversion on a 350? do you see results?
guess i should have specified, the center rise exhaust manifold conversion, from the old log style...
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Feb-01-2008, 04:09 PM
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#5 | | Farmer Jon
Name: Jon Age: 48 Vessel: 23' trophy Location: fallbrook Job:fisherman/plumber
Posts: 317
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Drawing a blank here, can somebody break out the crayons and make a picture for me. I'm not familliar with a center rise manifold. Never heard of that before. Like Fishability asks, is it bennificial ?
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Feb-01-2008, 06:42 PM
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#6 | | Captain
Name: Art Age: 39 Vessel: 40' Luhrs Convertible, Luhr'd Away Location: San Pedro/ Victorville Job:Elevator Service/Repair
Posts: 2,887
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Quote:
Originally Posted by FishAbility  guess i should have specified, the center rise exhaust manifold conversion, from the old log style... | Are you talking an intake manifold?
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Feb-01-2008, 09:14 PM
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#7 | | Captain Fire
Name: Mick Fire Age: 25 Vessel: 24' Skipjack Flybridge Location: Oceanside Job:Corporate Jet Pilot / Aircraft Mechanic Bio: I fly planes and kill fish, what more to life is there?
Posts: 867
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Quote:
Originally Posted by Luhr'd Away Are you talking an intake manifold? | no the exhaust manifolds on a chevy... the old style are rear risers and like like a "log" and the new ones are center risers... here, pics from the net.
new: 
old: 
ring any bells?
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Feb-01-2008, 09:14 PM
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#8 | | Registered User
Name: Andrew Vessel: 28' Skipjack Flybridge Location: Mission Viejo, CA Job:N/A
Posts: 455
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Quote:
Originally Posted by Luhr'd Away Are you talking an intake manifold? | That's what I was thinking ... high rise intake manifold. I guess it's supposed to add 10-15 horsepower.
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Feb-02-2008, 12:42 PM
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#9 | | Registered User
Name: Kerry Age: 52 Vessel: Yellow spot Location: LA Job:HUH??
Posts: 504
| Re: who has done the center rise manifold conversion on a 350? do you see results?
Uless you needed to replace the exhaust or it least the risers I GUESSING that it is not very cost effective. But if money is not a problem a little more power is always a good thing. Are the manifolds and/or risers FWC?
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Feb-04-2008, 10:39 AM
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#10 | | "It's all Good!"
Name: Carl Vessel: 26' Sea Ray, "yes dear..." Location: Gilbert, AZ Job:Village Smart Ass
Posts: 1,156
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Actually, it's like replacing the stock ehaust on a truck with more efficient headers.
The log style pollutes each cylinder downstream slightly. The center rise, is more even on exhaust. So it should be better. GLM has a short runner in the manifold. Stock Merc just dumps into a big opening.
GD
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Feb-04-2008, 12:00 PM
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#11 | | Registered User
Name: Danny Age: 34 Vessel: 25' 1968 Luhrs Location: Rancho Santa Margarita Job:US Marine helicopter mech
Posts: 869
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I've never ran the log style on the 350 I had in my Bayliner. I was a Cobra I used Osco Volvo replacement headers on (center rise) and they do evacuate the exhaust system more effeciently.
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Feb-04-2008, 01:03 PM
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#12 | | Captain Fire
Name: Mick Fire Age: 25 Vessel: 24' Skipjack Flybridge Location: Oceanside Job:Corporate Jet Pilot / Aircraft Mechanic Bio: I fly planes and kill fish, what more to life is there?
Posts: 867
| Quote:
Originally Posted by sickcat Uless you needed to replace the exhaust or it least the risers I GUESSING that it is not very cost effective. But if money is not a problem a little more power is always a good thing. Are the manifolds and/or risers FWC? | they will be eventually... for now raw water and salt away!
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