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[rbmntx]

I know this topic has been discussed to death but I've never had a chance to really compare different models before yesterday as to engine heat.  I have ridden my '07 SERK over 4K miles, granted not in hot weather but still enough that I think I could tell if it was going to be a problem which it has not been.  Yesterday I test rode an '07 SEUC2 with 1600 miles on it.  It was 85 degrees here and by the time I had put 12 miles on this bike, the right leg of my jeans felt like it was on fire.  Has anyone else had a chance to do a comparison?  Do any of you Ultra riders find this to be the case with your bikes?

[RedDevil]

Not in the least.  But I've got true duals and have the AFR down to a reasonable 13.9-14.1, so my bike runs cooler...average oil temp on my bike is 225 under normal riding and I've ridden it in temps exceeding 80 degrees now...although during the run through Skyline Drive with Hoist, my oil temp was 193, with outdoor ambient temp right around 65 degrees.

Getting rid of the cross-over pipe and getting the AFR down to a reasonable level really helps.
Cheers ,
 

[rbmntx]

Getting rid of the cross-over pipe and getting the AFR down to a reasonable level really helps.
Cheers ,
 

That is very good to know Devil, thanks.  Since I'm moving from the SERK to a SEUC that really made me rethink my decision.  I can only imagine what it would be like when it reaches 100 degrees here in Texas.  True duals are definitely the first thing on the agenda then.

[erniezap]

That is very good to know Devil, thanks.  Since I'm moving from the SERK to a SEUC that really made me rethink my decision.  I can only imagine what it would be like when it reaches 100 degrees here in Texas.  True duals are definitely the first thing on the agenda then.

Any aftermarket pipe which allows higher flow would accomplish the same thing:  True duals, 2 into 1, whatever...

[Woop De Doo]

I know this topic has been discussed to death but I've never had a chance to really compare different models before yesterday as to engine heat.  I have ridden my '07 SERK over 4K miles, granted not in hot weather but still enough that I think I could tell if it was going to be a problem which it has not been.  Yesterday I test rode an '07 SEUC2 with 1600 miles on it.  It was 85 degrees here and by the time I had put 12 miles on this bike, the right leg of my jeans felt like it was on fire.  Has anyone else had a chance to do a comparison?  Do any of you Ultra riders find this to be the case with your bikes?

FWIW- Two days ago I was doing some in town riding with my Grand daughter on the back. The air temp gauge was reading 110 and I think it was about 88 outside. After getting home I checked the digital oil temp and it was at 227. The left side cylinders,heads on the shiny part were in the 230 temp range. Before putting on the Reinhard's the rear head temp would be well above 300 with this outside temps. So yes, I have had the heat burn my legs, but I lowered the engine temps with true duals and a recal with the SERT.

    Don S

[2006_CVO_HD]

I would definitely consider true duals and getting rid of the crossover. I have had the Vance & Hines Dresser Duals on my FLHTCUI and FLHTCUSE with great results......

[nixobilly]

Yes sir!  These babies get hot.

I've gone with V&H true duals and a TMAX v2 and the temp (while moving) runs around 220-230.

Last week I rode from Houston to Temple to San Antonio and back (day temps around 85-90) and she ran 220 the whole time until I hit I-10 and Beltway 8 coming home -- stop and go traffic for 3 miles --  oil temp guage hit 270 and I smelled the scent of my thighs roasting on the heat!  Luckily, traffic let up, speedo got back up to 35 mph then the skies opened up with our usual afternoon Texas Toad Drowned-er and the Oil temp guage dropped to 170!   Damn I love riding in South Texas..   

REALLY looking forward to those 110+ degree days I'll experience when I ride home thru Nevada/Arizona this summer returning from Nelson.


Mark

[SilverDawg]

OK, I need an education here.  How does the true dual set up lower the operating temperature of the bike?  Or does it just reduce the heat on your right leg?

I have read here that you lose some low end torque with this set up?  True or False?

[Smiler]

Not in the least.  But I've got true duals and have the AFR down to a reasonable 13.9-14.1, so my bike runs cooler...average oil temp on my bike is 225 under normal riding and I've ridden it in temps exceeding 80 degrees now...although during the run through Skyline Drive with Hoist, my oil temp was 193, with outdoor ambient temp right around 65 degrees.

Getting rid of the cross-over pipe and getting the AFR down to a reasonable level really helps.
Cheers ,
 

What oil are you running?

[hd-dude]

OK, I need an education here.  How does the true dual set up lower the operating temperature of the bike?  Or does it just reduce the heat on your right leg?

I have read here that you lose some low end torque with this set up?  True or False?

Getting rid of the stock headers does help with the heat on the rider as the pipe is not there radiating heat to the rider. More importantly it allows the engine to breath better and the exhaust gases to escape out of the pipes faster thus less heat. With a good system I doubt you will loose low end torque over the stock setup.

[d o g o l s]

got no problems with true duals

[jeffj]

got no problems with true duals

me too, no issues


jeffj

[nixobilly]

No problem with torque or HP.

I do have a little irritation from wearing the neck brace (to prevent snapping my head as I twist the throttle!!!)   


Mark

[RedDevil]

What oil are you running?

Smiler,
Right now I'm running Syn3, but at the 5000 mile service I'm probably going to go to AMSOil through HD-Dude.  He's got a good price/quart for forum members.

Today's temp was 89 and ambient air guage in the fairing said just over 100.  I just got back from a trip up to one of the local dealerships to get my HOG pin for Rolling Thunder...when I got to the dealership, my temp was at 228 that was with stopping only at traffic lights and for the most part going at least 35 mph.  Lowers and fairing wings were open.  When I was coming home I got caught in some heavy traffic and doing a lot of idling at traffic lights.  When I pulled into the garage and checked the temp right after shutting down, I was at 267.  I was starting to feel some heat coming up at me from the rear cylinder towards the end, but not real annoying.  Hopefully, that will be alleviated somewhat when I put the HD mid-frame heat shields on when they get here.  The HD fairing wings (which I think are made by Kuryakyn for HD) work great.  It's amazing how much difference there is in air flow when you open them bad boys up.  I was impressed.  Well worth the money.
Cheers ,
  

[RedDevil]

OK, I need an education here.  How does the true dual set up lower the operating temperature of the bike?  Or does it just reduce the heat on your right leg?

I have read here that you lose some low end torque with this set up?  True or False?

CB,
Depending on which set of duals you go with.  If you get non-stepped, like the Vance & Hines, your low-end torque will be about the same or better depending on what you put on for mufflers.  If you put the stepped headers on, like the Rhineharts or the Bassanis, you will lose a little low end torque, as they come on a little later than the non-stepped pipes do, but will gain some hi-end horsepower.  It depends on what you want.  I wanted the torque to come on strong on the lower end without having to add a different set of cams yet, so I went with the non-stepped headers.  I don't play much, if ever, up around 5500 rpms, so the extra high-end ponies didn't mean anything to me.  My torque with the Vance and Hines setup that I have (duals and oval mufflers), peaks out at just a tad under 108 lb/ft torque at just around 2800-2900 rpms, right where I play most of the time.  So it's perfect for me.

Cheers ,