Engine mod = reduced engine life? - Victory Forums - Victory Motorcycle Forum
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post #1 of 34 (permalink) Old 06-05-2014, 06:39 PM Thread Starter
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Default Engine mod = reduced engine life?

Hey all, I think I already know the consensus of opinion here but I thought I would ask anyway. While at the shop talking to the "expert" he advised me to stick with stock because increasing engine performance would reduce engine life. He said the mods (most if them anyway) would cause additional heat and excessive engine wear. I was curious as to some feedback from those who've performed mods, have you experienced anything like this with you bikes?

2012 Sunset Red XCT
Vic Stage 1 upgrade
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post #2 of 34 (permalink) Old 06-05-2014, 06:45 PM
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heres a good one for Half Crazy to chime in on. the bikes now are tuned for emmisions, not performance or longevity, a properly tuned engine will run better , cooler , longer then a stocker thats running to hot due to emmissions standards.


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post #3 of 34 (permalink) Old 06-05-2014, 06:58 PM
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Strange that performance products would net a link in the Victory parts accesories catalogue and the connection Victory-Ness, Victory-Lloydz would co-exist isn't it.
Better breathing even to the point of cams can only enhance a great engine, provided theyre fitted correctly and working together as a package.
Bumping compression and/or turbo/mechanical or chemical supercharging. Would shorten the life expectancy I would think.

Victory Vegas 2010
Lloydz 109"cube big bore
" " 495 cams
" " TorqueTubes
" " timing wheel @4 deg.
" " Primary plate
" " IAV
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" " VM1 Cams
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post #4 of 34 (permalink) Old 06-05-2014, 07:43 PM
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My bike runs much cooler then stock.

2010 cross roads
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post #5 of 34 (permalink) Old 06-05-2014, 08:05 PM
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He would be correct... IF... the modifications were in any way radical (like racing parts), but the stuff that we modify these bikes with is super mild. Or if he was talking about a Harley engine.

The biggest (street) cam lift available for our bikes is .495" lift, which is nothing. VM-1s are like .412" lift. When you hot-rod a Harley, any serious cam is .600-.650" lift. This decreases the life of the valve train bigtime. The bottom end in a Harley is piss weak, so if you make serious power the stock bottom end of the engine will fail. The Victory bottom end is stronger than anything the guys around here throw at it and the valve train will live a long and happy life at .495" lift.

Here's the BIG ONE. If you put airbox, pipes, timing wheel, and fuel controller on your bike, you have stayed with stock. Those are NOT engine modifications. The engine is still stock. Even if you put cams in it, the engine is still stock, all you have done is change the valve lift and duration A LITTLE BIT. Simply undoing the castration done by the EPA to appease the tree huggers.

Now... when you take the engine apart and increase the bore, the stroke, the compression ratio... you have modified the engine. However, at the compression ratios that the stuff you get from Lloydz runs at it will run just fine on pump gasoline. If the engine was getting to a point where it wouldn't, then it would be getting into the range of something that would decrease longevity in a Vic motor.

There is no reason to think that even an engine as modified as mine won't run 100,000 miles.

Oh... and guess what? They make engines every day... I didn't get the last one they had.

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post #6 of 34 (permalink) Old 06-06-2014, 01:09 AM
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Quite the other way around. These bikes are lean from the factory.

Add a fuel controller and some performance mods....and you now have a happy motor that will run cooler and perform better.

Quote:
taken from The Vic Shop Facebook page:




Two pistons from two engines. Both with about 40K miles on them. Can you tell which one had the benefit of a fuel controller?
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post #7 of 34 (permalink) Old 06-07-2014, 09:15 PM Thread Starter
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You all are are really saying what I was thinking while this guy was talking to me. I got the feeling he was talking more about other motors and not Vics. BTW I changed the oil and air filter and since then my mileage has increased by 3-5mpg. Averaged 38 over the last three tanks. I think the timing wheel is next on my list of mods and will be my first performance related mod, can't wait.

2012 Sunset Red XCT
Vic Stage 1 upgrade
Ness floorboards
Ness clutch cover, rear brake, and heal/toe shifters
Ness mirrors
Cycleops flying V rack
Hi/Low HID
7 color LED Accents
near Tulsa, OK
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post #8 of 34 (permalink) Old 06-08-2014, 12:41 AM
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Quote:
Originally Posted by Slyerone View Post
Hey all, I think I already know the consensus of opinion here but I thought I would ask anyway. While at the shop talking to the "expert" he advised me to stick with stock because increasing engine performance would reduce engine life. He said the mods (most if them anyway) would cause additional heat and excessive engine wear. I was curious as to some feedback from those who've performed mods, have you experienced anything like this with you bikes?
Sorry, No expert by all means. I got the same crap when I first bought my bike. I guess they thought I was new to motors or something. Sounds like most dealers that just want you to understand that they don't like mods unless it is Victory specific and in the catalog which for the most part is expensive and useless. Take your time and read a lot about those who have paved the way for you to have a good running bike. One part at a time is good but some parts need to be done together. Once you set that bike up to run correctly you wont be seeing the dealer much.

2011 Cross Country. D&D's wrapped - VM1DR cams - PC5 - LLoyds high performance filter and ATS (Adjustable Timing system). Power output 115HP/115FTLBS tuned by KMC. Klock Werks flip shield - RF/PBR300x4 amp - Hertz HCX 6.5's - Victory 6X9 Magnum Lids - Victory XM - HMD Black Pull Backs with Victory performance grips. PIAA Led3 driving lights. accessories from Arlen ness - Witch Doctors - Noemtz Designs - Kuryakyn. Blacked out treatment powder Coat by PPC Stuart fl.
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post #9 of 34 (permalink) Old 06-08-2014, 06:34 AM
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Quote:
Originally Posted by Slyerone View Post
Hey all, I think I already know the consensus of opinion here but I thought I would ask anyway. While at the shop talking to the "expert" he advised me to stick with stock because increasing engine performance would reduce engine life. He said the mods (most if them anyway) would cause additional heat and excessive engine wear. I was curious as to some feedback from those who've performed mods, have you experienced anything like this with you bikes?
Heat kills. Making power creates heat.

If you don't run a modified engine any harder than a stock engine, it's probably a wash...but then if you aren't going to run it any harder than stock, why spend the money?

If you want real answers, go enroll in a school of mechanical/chemical engineering. This whole combustion process is a lot more complicated than most people on sickle forums presume to know.

A few "truths" that appear evident from run of the mill testing is that stoich mixtures have the highest exhaust gas temperatures (EGT). This is because:

a) An efficient burn maximizes fuel economy

b) catalytic converters perform best at these temperatures

Also, maximum power is achieved rich of stoich.

If exhaust valves are the weak link (and based on the fact that mfgs are now using coolant systems targeting this area it seems plausible) then it stands to reason that running rich or lean of stoich would benefit a valve without the benefit of such directed cooling...like ours. Prolly not so great for the life of our catalytic converters though.

From what I can gather on the subject (and without attending a class that ain't so easy) EGT is not necessarily proportional to engine temperature itself. Thus, while richening the mix may cool the gas exiting the exhaust valve, it may still increase overall engine temp.

And then there's still other considerations. If you bought the extra power to run 110 mph down the road, you'll be getting a lot of cooling air to the engine to help dissipate the extra heat generated. If you bought the extra power to sit in a parking lot, spin your tires, and make blue smoke for amazed onlookers who are unclear of the effects of inhaling burnt rubber, then...not so much.




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post #10 of 34 (permalink) Old 06-08-2014, 06:56 AM
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Quote:
Originally Posted by saddlebag View Post
Heat kills. Making power creates heat.

If you don't run a modified engine any harder than a stock engine, it's probably a wash...
and then I got lost in the tall grass.

Power includes heat, check.
Heat is the enemy, check.
Mods that decrease heat will likely increase life expectancy, check.
Mods that increase power will likely decrease life expectancy, check.
Pot bellied silverbacks are more interested in dumping cash and bragging rights into a brand new motor than they are seeing the odo click off six digits, check.

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We mostly go where we have to go

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