Should I get my props labbed and polished?
12-26-2016, 05:50 AM
#11
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What was your deciding factor on new manifolds, I see your other post. Your STOCK motor was designed,tuned and calibrated to run peak performance with STOCK parts and exhaust. You are only going to gain headaches with only aftermarket bypass systems. Keep it STOCK or rip out everything and start over. You might gain a little with a lighter wallet. I doubt your props are an issue, I've been playing the B3 prop game a while.
12-26-2016, 06:13 AM
#12
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Fwiw I have friends who have removed the cats and had no issues. Same as in cars. They are a big pain in the ass. I wasn't there when they were removed and re programmed but to my knowledge the programming was only to handle the O2 sensors and not for tuning purposes. This is a website of people continually modding and improving let's not act like it was perfect from the factory.
12-26-2016, 07:13 AM
#13
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How clean is the bottom of hull, outdrive and props (growth)?
What does your spark plugs look like ???? Wet - black - tan or ???
Also prob in needed of spark plugs and possible wires ?.
Compression test numbers are ?
Very Clean flame arrestor and throttle body ?
Fuel injectors needing to be flow tested and clean ???
What does your spark plugs look like ???? Wet - black - tan or ???
Also prob in needed of spark plugs and possible wires ?.
Compression test numbers are ?
Very Clean flame arrestor and throttle body ?
Fuel injectors needing to be flow tested and clean ???
Well I TOTALLY missed that your 502 in which MERC calls it an 8.2 CATALYST ENGINE. Your engine is a 2010 and up year model -- Not what every else here thinks it is ( the older 502 1993 thru 2000 )..
WOW and WOW --- you took off the catalyst system, manifolds and risers and what did you do to the PCM or NOT do for a correct calibration ???
YOU CAN NOT RUN THE ENGINE ON A STOCK LOCKED calibrated PCM from MERC. when you took off the their exhaust set up and catalyst system. You are going to damage the engine with the stock tune with out those stock OEM parts that were engineered into the calibration from MERC. .
Tech speaking MERC calls this the 8.2 EC engine FYI MERC never brands this engine a 502, why I missed it being a CAT engine to begin with per your calling it a 502.
You are actually down 400 RPM's not 200 rpm's per removing the stock parts for your app.
The 8.2 EC engine is max 5000 rpm's.
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WOW and WOW --- you took off the catalyst system, manifolds and risers and what did you do to the PCM or NOT do for a correct calibration ???
YOU CAN NOT RUN THE ENGINE ON A STOCK LOCKED calibrated PCM from MERC. when you took off the their exhaust set up and catalyst system. You are going to damage the engine with the stock tune with out those stock OEM parts that were engineered into the calibration from MERC. .
Tech speaking MERC calls this the 8.2 EC engine FYI MERC never brands this engine a 502, why I missed it being a CAT engine to begin with per your calling it a 502.
You are actually down 400 RPM's not 200 rpm's per removing the stock parts for your app.
The 8.2 EC engine is max 5000 rpm's.
.
No more fouled plugs and no more dumping fuel.
Fwiw I have friends who have removed the cats and had no issues. Same as in cars. They are a big pain in the ass. I wasn't there when they were removed and re programmed but to my knowledge the programming was only to handle the O2 sensors and not for tuning purposes. This is a website of people continually modding and improving let's not act like it was perfect from the factory.
So, back to my original question and it sounds like I might need to pull the plugs and see how I'm running. We ran WOT last night but I had a full boat load of people and I was around 4600 RPM. Going to go out again today and see if I can get some better numbers. Boat runs great and pulls onto plane very quick. Just trying to figure out why I lost some top end over the last couple years.
12-26-2016, 10:32 AM
#14
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Everyone would have to assume when info is missing in posts - never was mentioned about he has the cat eliminator plugged into the system nor mentioned he went back with stock manifolds and risers and the reason why they were replaced from saltwater use. How would anyone know that when the details are not written. Just saying no other intent but if your looking for help you have to write a lot more detailed info in posts to be able to get the correct help.
IMO its the cat eliminator added in the mix as the problem plus it is unproven. I know where he bought from and its hugely discounted. Maybe for reasons unknown - like how well does not it work correctly or needs to start selling.
Most cars that I know DO NOT have a locked tune ECM's from the OEM and have many plug & play different levels of recalls to input.
Also nobody said MERC tune was worth a crap or not either. They really are still way behind on the EFI / ECM side from what a lot of these auto tuners are doing in the auto world.
.
IMO its the cat eliminator added in the mix as the problem plus it is unproven. I know where he bought from and its hugely discounted. Maybe for reasons unknown - like how well does not it work correctly or needs to start selling.
Most cars that I know DO NOT have a locked tune ECM's from the OEM and have many plug & play different levels of recalls to input.
Also nobody said MERC tune was worth a crap or not either. They really are still way behind on the EFI / ECM side from what a lot of these auto tuners are doing in the auto world.
.
Last edited by BUP; 12-26-2016 at 12:23 PM.
12-26-2016, 04:10 PM
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Everyone would have to assume when info is missing in posts - never was mentioned about he has the cat eliminator plugged into the system nor mentioned he went back with stock manifolds and risers and the reason why they were replaced from saltwater use. How would anyone know that when the details are not written. Just saying no other intent but if your looking for help you have to write a lot more detailed info in posts to be able to get the correct help.
IMO its the cat eliminator added in the mix as the problem plus it is unproven. I know where he bought from and its hugely discounted. Maybe for reasons unknown - like how well does not it work correctly or needs to start selling.
Most cars that I know DO NOT have a locked tune ECM's from the OEM and have many plug & play different levels of recalls to input.
Also nobody said MERC tune was worth a crap or not either. They really are still way behind on the EFI / ECM side from what a lot of these auto tuners are doing in the auto world.
.
IMO its the cat eliminator added in the mix as the problem plus it is unproven. I know where he bought from and its hugely discounted. Maybe for reasons unknown - like how well does not it work correctly or needs to start selling.
Most cars that I know DO NOT have a locked tune ECM's from the OEM and have many plug & play different levels of recalls to input.
Also nobody said MERC tune was worth a crap or not either. They really are still way behind on the EFI / ECM side from what a lot of these auto tuners are doing in the auto world.
.
That being said, I do think I need to send my ECM off to get flashed as I'm getting a ODB Service Soon error on my smart craft gauge which would seem to indicate thee CAT eliminator isn't doing it's job.
