Author Topic: Stock Exhaust on a Mild Build?  (Read 941 times)

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Offline WhipLash96

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Stock Exhaust on a Mild Build?
« on: December 09, 2017, 06:16:54 AM »
How many of you are using the stock exhaust on your mildly upgraded EVO? I have a friend that is looking to have his 98 Wide Glide kicked up a couple of notches. I am helping him with this build so he can save some money as money is tight for him. If you aren't using the stock exhaust, suggestions are welcomed. Thank You.
Thanks,
Whip

Offline thumper 823

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Re: Stock Exhaust on a Mild Build?
« Reply #1 on: December 09, 2017, 07:34:37 AM »
Remeber the engine is an air pump...the right exhaust will add the TQ and HP.
Factory exhaust is usually the first thing to throw in the trash
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Deye76

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Re: Stock Exhaust on a Mild Build?
« Reply #2 on: December 09, 2017, 08:08:30 AM »
No point in performance enhancements if the exhaust is going to be the choke point. Not enough information to make suggestions.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline thumper 823

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Re: Stock Exhaust on a Mild Build?
« Reply #3 on: December 09, 2017, 08:16:21 AM »
Thunder headers-Are they still a good overall choice?
Last I knew they were pretty good.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Online tmwmoose

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Re: Stock Exhaust on a Mild Build?
« Reply #4 on: December 09, 2017, 08:23:21 AM »
Evo headers and good slip ons have always been a good EVO exhaust. My FXR with a mild 80" and then a Ultima 107 uses the OEM headers and Cycle Shack muffs and lately a pr of Supertrapp 3" disc muffs. Ran awesome,same result on the dyno. Patience and perseverance will land you a set of obsoleted Cycle Shack slip-ons off eBay before the snow melts. The "early" SE muffs were Cycle Shacks also if you get the slash cuts there easy to slightly modify the baffle but not to much don't get carried away

Offline Thermodyne

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Re: Stock Exhaust on a Mild Build?
« Reply #5 on: December 09, 2017, 08:25:21 AM »
I run oem exhaust on both of my FXR's.

The 2000 is a mild Evo.  80inch, EV27, spark box, breather and a tune.  The cans are just punched.



The 84 is a little stouter.  80 inch 10.5:1, Ported heads w 1.90 intakes, spark box, ect.
Early high crossover H-pipe with -82 glass pack cans. 



What can I say, I like the way stagers look. 


Offline Burnout

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Re: Stock Exhaust on a Mild Build?
« Reply #6 on: December 09, 2017, 08:28:31 AM »
Do Not use drag pipes if you want a performance increase.

A couple of the best exhaust systems are a Thunder Header or a SuperTrapp 2:1 or the White Bros E series (if you can find one)

FuelMoto has a Jackpot pipe but I don't think they make one for an EVO. Two Bros Racing is making a very nice pipe for the FXR that may fit your application

Right behind that is a Vance & Hines Pro Pipe, and I say behind because it does not have the long primary pipe for the rear cylinder so this pipe leaves some torque on the table from idle to 3000. right where you need it for the street. I was also impressed with their plating 15 years ago, hope it's still as good.

For a budget build I would use slip on mufflers with the stock HD headers, unless you have a touring model. The touring models have the worst exhaust HD ever made, and then used it on the heaviest model that needed the torque the most. ThunderHeader offered a long rear primary 2:1 single side exhaust that worked the best. True duals suck, they leave huge piles of power on the table and are capable of eliminating any "personality" your cam has. If you want the balanced look install a dummy exhaust on the left side!
They don't call me Ironhead Rick just because I'm "hard headed"

Offline tdrglide

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Re: Stock Exhaust on a Mild Build?
« Reply #7 on: December 09, 2017, 08:35:45 AM »
For a mild build, what about a proper set of slip-on's on stock exhaust pipes. Probably find something on ebay or craigslist cheap.
I run stock exhaust pipes with cycle shack slip-on's on a mild build fxr now.  I ran their slip-on's on 94 fxd back in the 90's. I remember they worked pretty good. A bit loud. No longer available new, but ebay, craigslist....

Offline Thermodyne

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Re: Stock Exhaust on a Mild Build?
« Reply #8 on: December 09, 2017, 08:43:59 AM »
For a mild build, what about a proper set of slip-on's on stock exhaust pipes. Probably find something on ebay or craigslist cheap.
I run stock exhaust pipes with cycle shack slip-on's on a mild build fxr now.  I ran their slip-on's on 94 fxd back in the 90's. I remember they worked pretty good. A bit loud. No longer available new, but ebay, craigslist....

The oem stagger pipes will make horse power to equal more or less any of the aftermarket pipes, its just a matter of finding good cans.  And that's a little hard to do these days.  The -82 cans were always to go to pieces, but they have gotten real rare.  And most of the aftermarket has stopped making cans for FXR's.  More or less any of the aftermarket setups will give good service, with the exception of Short Shots.  And Thunder headers have a nasty habit of breaking at the collector on FXR's.  The ones to stay away from are the cans with the flap baffle bolted in.

Offline tdrglide

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Re: Stock Exhaust on a Mild Build?
« Reply #9 on: December 09, 2017, 09:10:14 AM »
OP has a dynamic wide glide I believe. Slip-on's I'm running on a fxr originally came off a soft tail.  I had a local muffler shop make a small modification to the inlets and was good to go. So that may be an option if you can't find model specific

Offline tdrglide

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Re: Stock Exhaust on a Mild Build?
« Reply #10 on: December 09, 2017, 09:12:34 AM »
Dyna wide glide  (stupid spell check)

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #11 on: December 09, 2017, 09:18:10 AM »
Thanks for the replies gentleman as always great information. Here is what I found that I think he would be happy with. Thoughts?

https://products.vanceandhines.com/store/harley/16837/
Thanks,
Whip

Offline thumper 823

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Amateur engineering with bad math.

Offline Thermodyne

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Re: Stock Exhaust on a Mild Build?
« Reply #13 on: December 09, 2017, 09:32:09 AM »
OP has a dynamic wide glide I believe. Slip-on's I'm running on a fxr originally came off a soft tail.  I had a local muffler shop make a small modification to the inlets and was good to go. So that may be an option if you can't find model specific

The Dyna cans are the same as one of the FXR cans (Front IIRC).  The Dyna ran two cans of the same PN, while the FXR had a front can and a rear can.  The difference it the TBolt bracket location, so running them is just a question of adapting the cross bar. 

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #14 on: December 09, 2017, 09:37:09 AM »
http://www.harley-performance.com/harley-exhaust.html


Thanks for posting this, but I understand the importance of the system.  :wink: My question was based off the fact that I just don't have a lot of experience with the EVO so I don't know what people do to these engines or what is available for them. Personally, I like the stock header pipes as it has the tube connecting the front and rear pipes so the savaging is present. However, the stock mufflers are just too small for sure.
Thanks,
Whip

Offline tdrglide

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Re: Stock Exhaust on a Mild Build?
« Reply #15 on: December 09, 2017, 10:08:25 AM »
I think those Vance and Hines slip-on's would look real nice on a clean 20 yr old basically stock motorcycle. Be my choice.
By mild build I am assuming bolt in cam, air cleaner and exhaust.

Offline Burnout

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Re: Stock Exhaust on a Mild Build?
« Reply #16 on: December 09, 2017, 10:39:22 AM »
For a mild street build you want TORQUE not HP. You are not building a motor that is going to spend much (if any) time 4000 to 6000 RPM.

That is why I went straight to the 2:1 pipes, it is easy to wander of into marketing land and get caught up in peak HP numbers.

Remember HP is fictional, HP is a mathematical expression latched onto by marketing dweebs to impress FARMERS.

Torque is a real unit of work, torque is what a dyno measures.
The "area under the torque curve" is what you feel.
So many get caught up in HP numbers (looking at the wrong end of the dyno chart) they forget Torque is what gets the bike rolling.
Dyno builders are also caught in this dilemma, the first thing a farmer wants to know after a dyno run is a PEAK HP #!
They are looking at a dyno sheet with blinders created by marketing dweebs.
Many exhaust designs are based on looks or tradition and completely ignore TORQUE.
Most (if not all) exhaust MFGRs buy into this and make no mention of torque, only PEAK HP.
Because they are selling exhaust to farmers
These exhaust designs have dips in the torque curve that kill momentum when pulling through the gears.
This makes the rider increase the revs to avoid this dip, but given the HD's best RPM range shifting usually drops you right in the middle of the dip.
No gain except in noise level, and noise equals power to most farmers so they are happy.
They don't call me Ironhead Rick just because I'm "hard headed"

Offline Reddog74usa

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Re: Stock Exhaust on a Mild Build?
« Reply #17 on: December 09, 2017, 11:42:05 AM »
As said, the stock header pipes work very well with a nice set of CS slip-ons on a mild build. One of my fav's is a V-Thunder 3010 bolt in cam, DTT iggy, Mik 42 and a set of stock head pipes with the mentioned CS slip-ons. GREAT bang for the buck and lot's of fun in my FXR. Great street manners, very quiet valve train and power right where you ride. Just twist the grip a little and woooosh you just passed that truck with no downshift needed. Also, as mentioned, don't get caught up in the marketing hype and waste a ton of money. Good luck, RD
RIDE IT LIKE YA STOLE IT

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #18 on: December 09, 2017, 11:44:52 AM »
I'm no stranger to building engines and I agree with all that has been said.  :bike:
Thanks,
Whip

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #19 on: December 09, 2017, 11:46:48 AM »
I think those Vance and Hines slip-on's would look real nice on a clean 20 yr old basically stock motorcycle. Be my choice.
By mild build I am assuming bolt in cam, air cleaner and exhaust.

I think so too. Vance and Hines makes some good stuff that is for sure.
Thanks,
Whip

Offline Burnout

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Re: Stock Exhaust on a Mild Build?
« Reply #20 on: December 09, 2017, 12:28:32 PM »

I think so too. Vance and Hines makes some good stuff that is for sure.

V&H has great fit and finish on all their exhaust products I have seen.

A lot of their exhaust products don't fall into the best performing category, they are made to appeal to the looks and sound crowd.

I would bless the ProPipe and their slip on mufflers as fine performance gear.
I am not familiar with their whole current product line so there may be others that perform equally well.

Non-stock bikes may/will need custom exhaust made to fit correctly.
Strokers need pipes adjusted to clear the trans and cam chest correctly.
Bikes with altered controls may also need other considerations.
They don't call me Ironhead Rick just because I'm "hard headed"

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #21 on: December 10, 2017, 05:44:32 AM »

I think so too. Vance and Hines makes some good stuff that is for sure.

V&H has great fit and finish on all their exhaust products I have seen.

A lot of their exhaust products don't fall into the best performing category, they are made to appeal to the looks and sound crowd.

I would bless the ProPipe and their slip on mufflers as fine performance gear.
I am not familiar with their whole current product line so there may be others that perform equally well.

Non-stock bikes may/will need custom exhaust made to fit correctly.
Strokers need pipes adjusted to clear the trans and cam chest correctly.
Bikes with altered controls may also need other considerations.

 :agree:, however those mufflers that I posted will do a lot more for his bike than the shitty stock mufflers with modified baffles that he has in his bike now. :smiled:
Thanks,
Whip

Offline Burnout

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Re: Stock Exhaust on a Mild Build?
« Reply #22 on: December 10, 2017, 08:59:35 AM »
Absolutely!

Punching holes in stock mufflers is futile, once you get the hole open big enough they sound horrible and are still fairly restrictive.
They don't call me Ironhead Rick just because I'm "hard headed"

Offline WhipLash96

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Re: Stock Exhaust on a Mild Build?
« Reply #23 on: December 10, 2017, 06:23:25 PM »
Absolutely!

Punching holes in stock mufflers is futile, once you get the hole open big enough they sound horrible and are still fairly restrictive.
:agree:
Thanks,
Whip

Online 1FSTRK

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Re: Stock Exhaust on a Mild Build?
« Reply #24 on: December 11, 2017, 01:28:27 PM »
Slip ons are the way to go, the cross over will allow more performance through the same size muffler compared to the VH head pipes.
The best set-up I have seen is the Stock Twin cam Dyna head pipes with the cross tube down by the muffler. They bolt right on an Evo and clean up the veiw of the engine. It also makes jetting a lot easier.
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