I got my Bob home now and and putting some miles on it. I kind of want to get some more sound out of the pipes. I don't want to rattle the neighbors windows but I would like to get a little deeper richer sound. I understand the "more air in more air out concept". Same a s a diesel and i am quite familiar with adding performmance parts to diesels. What I am not quite sure about is this MAP thing. I am assuming it is an engine control computer? Is remapping required for new pipes and an air cleaner. If I dont do it, what might happen? How does it affect a new bike warranty. I don't expect to be doing anymore engine mods so should I pay to get it done or buy a device to do it. How do dealer service managers feeel about these mods when you go in for warranty work.

 

I'm not really able to answer your questions, except to say that remapping is definitely required for new pipes and an air cleaner, but one thing I know for sure is -- there are no "simple answers to simple questions" when it comes to this topic. Answers vary greatly depending on whose giving the answers. [&:]

 

You will need to have your bike remapped for the mods you mentioned. If that's all you ever plan to do then talk to your dealer and see what they reccommend. They have improved the HD Download (or so I've heard) and you may be able to get by with that. The HD Download is just a download that is installed to your stock ECM to modify the AFR (air/fuel ratio) so your bike will not be running too lean. Kinda like rejetting the carbed bikes. If you don't do this you could damage the engine and then the dealer will have you by the short ones. Your dealer should not give you any problems at all for having these mods installed. Everyone does it.

 

I just had the V&H Big Shots Staggered and SE Air Cleaner put on my bike last week and after the dealer told me about the new race cartridge/download they are using I went with that. Today was the first day I was able to take it out and really give it a good run to see how it was running and if this race download works OK. First off, the pipes are a bit louder than I expected. I'm not sure if this is because I ran the stock pipes for 3 months and got un-used to loud pipes or what. I had V&H straightshots on my Sportster and they didn't seem quite as loud. Probably I'll get used to it - and I definitely like that people can hear me now. As far as the download goes, I have noticed the slightest amount of popping on deceleration but only occasionally -- and it sounds more like bubbling than popping. I kind of like the sound actually. It was cool out in Maryland today, so I guess if it was going to pop, it would surely have done it today. I was concerned that the race download still might not be rich enough -- sure as heck don't want to damage the engine -- but I'm feeling pretty good about it so far.

 

I'll be doing the same thing. I have the Screaming Eagle 2 slip ons and bought the A/C. Of course, the cartridge thing is on back order, hope to see it around the 20th. The dealer told me the cartridge is to get around the EPA stuff, he said the MoCo wont provide it on the website. [sm=huh.gif]

 

mirage2521, I've been around the proverbial block with this and I have developed my own opinion through articles on this forum, my own bike's performance, and talking to mechanics etc. Having said that, I'm happy to be corrected if I have gotten anything wrong here.

Firstly, right now you aren't looking at increasing the performance at all, just a bettor note right ?
That being the case I'd keep your setup as simple as possible. What you don't want to do is end up with a chain of dependencies that mean you need numerous additional parts, just to get your bike running right.


Down to the options available;

Some guys have had success drilling holes in their stock muffler baffles but I wouldn't recommend it. It is hit and miss (for hackers like me anyway).

So excluding that option the base exhaust mod, I would see as being the Harley Davidson slip-on mufflers. These are still legal in most US states but do have a better and slightly louder note. I haven't heard them so if you can grab a listen to a bike with them it would be worth it. I don't think you need any other mods with these as I believe they don't impact the mixture to any large degree (?) although it is still an option to do so. Happy to hear from anyone with these who can confirm or otherwise.

The next rung up, is the Screamin' Eagle slip-on mufflers. I have these. They will allow air to run through your system more efficiently and so consequently your mixture will have too much air and not enough fuel ( lean). With this option you would just need the Slip-ons and a download.

It is generally accepted that from this modification onwards you need to look at changing your ecu mapping via either a download from HD which is the cheapest option and has set values for a particular specification, or a programmable michanism (SERT (Screamin eagle Race Tune) or Power Commander (PC3) or other similar products) where the mixture values can be changed using a computer and for the optimal, a Dyno tune as well.

If you are only concerned about the engine note, you don't need the high flow air cleaner. When you introduce a high flow air cleaner the mixure will become even leaner and it's best to look at other options than the HD download like the SERT and the PC3. I made the mistake of Screamin' eagle Slip on's , a high flow air filtrer and a HD Download, and my bike is running lean. I am purchasing the PC3 next week and getting the bike dyno tuned, so effectively I wasted my money on the HD download.

I find the Screamin Eagle Slip-ons perfect for volume, in that you can ride relatively quietly, but when you give it a squirt you make a nice, rich rumble, and folks around you know you are there.

Next option up is a full exhaust system replacement. More expensive but better performance. 99.9% of the time a lot louder too. You will generally shake your neigbours windows with these and you definately need to look at a PC3/SERT/other programmable solution. There are combinations of HD and aftermarket exhaust systems and mufflers, but I haven't researched these. Sounds like overkill for what you are after anyway.

My suggestion is:

1.Ask your dealer if he has a bike with the slip-on HD exhasuts and have a listen. I suspect they will be too quiet.

2. Same as above for Screamin eagle slip ons. I think these will be your best option. I think the key point is, if you might want a different exhaust, or any other mods later, it's worth going for the PC3/SERT/ other programmable option now, and not waste time on the HD download. This gives the best flexibility but is slighlty more expensive.

Bit of a rant but I hope that helps...

 

Buy the SERT and get it dyno tuned......you won't be sorry.

 

Thanks for taking the time to write this. I am not at all concerned about performance...this bike will already go faster than I will go. Just looking for a little rumble. I thought I read that the Screaming Eagle II slip ons were no longer avail? A guy at work with an older deuce has a set of V&H pipes that he gutted and near the end he welded an all-thread stud on the inside of the pipe then welded a flat washer on a nut and now of he wants loud he slide a wrench in and turns the washer parralell with the pipe and if he wants quieter he turns it perpindicular and it quiets down to a nice rumble.
[quote]ORIGINAL: iwant1

mirage2521, I've been around the proverbial block with this and I have developed my own opinion through articles on this forum, my own bike's performance, and talking to mechanics etc. Having said that, I'm happy to be corrected if I have gotten anything wrong here.

Firstly, right now you aren't looking at increasing the performance at all, just a bettor note right ?
That being the case I'd keep your setup as simple as possible. What you don't want to do is end up with a chain of dependencies that mean you need numerous additional parts, just to get your bike running right.


Down to the options available;

Some guys have had success drilling holes in their stock muffler baffles but I wouldn't recommend it. It is hit and miss (for hackers like me anyway).

So excluding that option the base exhaust mod, I would see as being the Harley Davidson slip-on mufflers. These are still legal in most US states but do have a better and slightly louder note. I haven't heard them so if you can grab a listen to a bike with them it would be worth it. I don't think you need any other mods with these as I believe they don't impact the mixture to any large degree (?) although it is still an option to do so. Happy to hear from anyone with these who can confirm or otherwise.

The next rung up, is the Screamin' Eagle slip-on mufflers. I have these. They will allow air to run through your system more efficiently and so consequently your mixture will have too much air and not enough fuel ( lean). With this option you would just need the Slip-ons and a download.

It is generally accepted that from this modification onwards you need to look at changing your ecu mapping via either a download from HD which is the cheapest option and has set values for a particular specification, or a programmable michanism (SERT (Screamin eagle Race Tune) or Power Commander (PC3) or other similar products) where the mixture values can be changed using a computer and for the optimal, a Dyno tune as well.

If you are only concerned about the engine note, you don't need the high flow air cleaner. When you introduce a high flow air cleaner the mixure will become even leaner and it's best to look at other options than the HD download like the SERT and the PC3. I made the mistake of Screamin' eagle Slip on's , a high flow air filtrer and a HD Download, and my bike is running lean. I am purchasing the PC3 next week and getting the bike dyno tuned, so effectively I wasted my money on the HD download.

I find the Screamin Eagle Slip-ons perfect for volume, in that you can ride relatively quietly, but when you give it a squirt you make a nice, rich rumble, and folks around you know you are there.

Next option up is a full exhaust system replacement. More expensive but better performance. 99.9% of the time a lot louder too. You will generally shake your neigbours windows with these and you definately need to look at a PC3/SERT/other programmable solution. There are combinations of HD and aftermarket exhaust systems and mufflers, but I haven't researched these. Sounds like overkill for what you are after anyway.

My suggestion is:

1.Ask your dealer if he has a bike with the slip-on HD exhasuts and have a listen. I suspect they will be too quiet.

2. Same as above for Screamin eagle slip on

 

There are still some around in Australia anyway. I'm sure some you could locate some if you wanted, but do it sooner rather than later.

 

I bought mine from the dealer about 3 weeks ago, they had them in stock (amazing for my local dealer). I also heard they were going to be discontinued.