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Thread: Reed change lose power?
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07-31-2019, 12:27 AM #1
Reed change lose power?
Has anyone ever heard of a Mercury V6 losing high-end horsepower by switching to after market reeds? I "upgraded" to carbon fiber reeds awhile ago, and while the engine seems to run better at displacement speeds and seems to have better low-end throttle response, I've lost 2 mph and maybe 300 rpm at WOT. I don't know what else could have caused this. I'm going to check compression tomorrow.
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07-31-2019, 05:27 AM #2Screaming And Flying!
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A reed change can cause a drop in power if the new reeds are too stiff.
Erik Kiser
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07-31-2019, 06:05 AM #3Bud Conner "Heathen" "Defending Our Constitution"
FOR ALL ENGINE APPLICATIONS
DRY Film Lubricant for Piston Skirts & Cranks + Thermal Barrier Ceramic Coatings for Piston Tops, Combustion Chambers, Valves etc !!
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07-31-2019, 06:24 AM #4Screaming And Flying!
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Someone on here did a reed comparison years ago, it was very informative. Reeds are critical....
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
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07-31-2019, 06:57 AM #5Supporting Vendor
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Eric is correct too stiff a reed will limit ability of a stock engine to “draw” vapor into intake I use only TDR reeds and a .022” composite reed I do NOT use carbon fiber reed valves on any motor I build , race or recreational for that reason ...JMO
JayJay @ JSRE
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07-31-2019, 07:02 AM #6Screaming And Flying!
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I just reviewed the reed tests, very interesting.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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07-31-2019, 10:25 AM #75000 RPM
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Have a link to the reed tests?
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07-31-2019, 10:48 AM #8Banned
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07-31-2019, 11:45 AM #9Screaming And Flying!
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I gave up on the search and went google. Typed scream and fly reed tests. https://www.screamandfly.com/archive.../t-206831.html Near the end of the thread
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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07-31-2019, 05:06 PM #10
That was VERY interesting. I wish I hadn't thrown away my stock steel reeds or I'd swap them and check numbers again.
I have a 2.0L 150 XR2, so the reeds are horizontal. I hate to say it, but the reeds are CCMS reeds. It runs a little better at displacement speeds and "seems" to have better low end throttle response, but the boat is at least 2 mph slower and was turning up 6200-6300. Now I'm only getting 5900. I want my old reeds back!
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07-31-2019, 05:31 PM #11
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07-31-2019, 08:44 PM #12Nitrous is like a slut. u wanna hit it but you know there will be consequences.
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08-01-2019, 01:59 AM #13
You are correct. Sorry. Semantics problem. As to the other comment from bigblue454chevy, I get it. But, you're full of it. I've operated this motor on this boat with this set-up for at least 10 years. It doesn't run like it used to, BUT...I haven't taken a compression reading yet.
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08-01-2019, 07:17 AM #14Supporting Vendor
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Give a call so we can figure this out,Chris,305-394-3354
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08-01-2019, 04:10 PM #156000 RPM
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Was their a change in temp and humidity from the higher numbers. 90-100 temp can rob 500 rpm vs. 50-70. Some older carb motors even have cold hot stop levers so you don’t over run when it’s cool out.
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