Stainless Marine or Gill exhaust for HP500 motor
#1
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I have factory Gill/ Mercruiser high Performance exhaust manifolds on my HP500 motor. It has the "Captains Call" to switch to quiet mode which I will never use.
I also have a set of the Stainless Marine "High Torque" exhaust manifolds and manifolds and riser set which I bought for another boat but sold the boat before I could install them.
WOULD THERE BE ANY ADVANTAGE IN INSTALLING THE STAINLESS MARINE IN PLACE OF THE FACTORY GILLS?
I HAVE HAD STAINLESS MARINE ON PREVIOUS BOATS AND LOVED THE PERFORMANCE AND SOUND. NOT THAT I DON'T LIKE THE SOUND OF THE GILLS BECAUSE DO. bUT THERE MUST BE SOME BACK PRESSURE WITH THE CAPTAINS CALL SYSTEM.
WHAT DO YOU GUYS THINK.
I also have a set of the Stainless Marine "High Torque" exhaust manifolds and manifolds and riser set which I bought for another boat but sold the boat before I could install them.
WOULD THERE BE ANY ADVANTAGE IN INSTALLING THE STAINLESS MARINE IN PLACE OF THE FACTORY GILLS?
I HAVE HAD STAINLESS MARINE ON PREVIOUS BOATS AND LOVED THE PERFORMANCE AND SOUND. NOT THAT I DON'T LIKE THE SOUND OF THE GILLS BECAUSE DO. bUT THERE MUST BE SOME BACK PRESSURE WITH THE CAPTAINS CALL SYSTEM.
WHAT DO YOU GUYS THINK.
#2
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Stay with the Gils if they are sound, Think about the captains call, you have 2 big openings instead of just one without them. No way there is anymore back pressure. Depending on your risers, if you decide to go to upgrades and go to a cam with more overlap, then the captains call risers may have to go in favor of a riser that is dryer farther back. This will reduce the chance of reversion hurting the motor,
#3
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The Stainless Marines will outlast the Gils according to previous posts on another thread. Seems like there are plenty of used Gil risers accompanied with worn out manifolds.
#4
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My Gils have been in fresh water all their lives and are vintage 1990. I dont think Id be comfortable running aluminum manifolds in salt water for any period of time.
#5
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Sounds like there is no need to change them out to the SM exhaust.
10-15 years on the Gils is a good testament to their durability.
I stand corrected.
Do a search in this section and you can find a couple members with some Gil risers for sale if you want to eliminate the Captain's Call.
10-15 years on the Gils is a good testament to their durability.
I stand corrected.
Do a search in this section and you can find a couple members with some Gil risers for sale if you want to eliminate the Captain's Call.
#6
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Well, If you NEVER use the switchable, get rid of it along with the "Y" pipe. Someone will pay you money for that set-up. Then install the SM equipment, since you already have it. It should be slightly more efficient than the Gill and you won't ever have to worry about salt. --- Jer
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my S/M are 11yrs old I run in salt water, but I do flush them out after use. and they make a little more power than the gills.
#8
Ginger or Mary Ann?
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Aren't the SM and Gils manifolds basically the same design? Longer dividers to keep the side by side firing cyls, 4/6, & 5/7 from pulling from each other? Both same 4" risors. Where's the difference to make more HP one over the other?
Last edited by US1 Fountain; 11-06-2005 at 08:36 AM.
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