Other When?

[Aquaholic]

When will the engine designers/engineers in our world, get their heads out of their asses, and design an engine around user serviceable rods and bearings? Today's crop of high strung, thoroughbred engines are built around the flimsiest POS cranks I've ever seen. Especially the connecting rods/bearings.

Come on guys...give us something like what the 2 stroke outboard guys have.

 

[Quinc]

Not worth the extra cost for the crank makers.

 

[alberta guy]

Will never happen. Too much money to be made in oem replacement parts when stuff breaks.

 

[speedysprocket]

And extra space required and extra weight as a result of all that extra material.

 

[King Kang]

Fine, I'll bite.

When, you ask? Probably around the time you finish that blunder jet story.

 

[Aquaholic]

And extra space required and extra weight as a result of all that extra material.

Both of those hurdles could be overcome. Czech out this interesting read on Titanium rods Yamaha came up with for their YZF-R1.

http://www.cycleworld.com/2014/11/1...m-connecting-rods-explained-by-kevin-cameron/

 

[yamanube]

Would lower rod bolts cause too much turbulence in a two stroke engine and hurt performance?

 

[catpower]

I would guess they have no choice with that design, I'm thinking all two stroke outboards have dead heads. Only way to install piston and rods is from crank side.

 

[Schmidty721]

When will engine designers/engineers in our world, get their heads out of their asses, and design an engine around user serviceable rods and bearings? Today's crop of high strung, thoroughbred engines are built around the flimsiest POS cranks I've ever seen. Especially the connecting rods/bearings.

Come on guys...give us something like what the 2 stroke outboard guys have.

View attachment 283651 View attachment 283652

Quit bitching and go build it then

 

[badvinny]

beautiful rods

 

[mike b]

I have a rod now after seeing those rods. If I had those in my motor I would never assemble it and just look and the pretty parts haha

 

[Aquaholic]

Rod porn.

 

[Captain PegLeg]

Rod Porn...

 

[Pablo]

I have a rod now after seeing those rods. If I had those in my motor I would never assemble it and just look and the pretty parts haha

"Rod-gazer"


Sent from my iPhone using Tapatalk

 

[bored&stroked]

I've long wondered why we have multi piece crankshafts and roller bearings. Must be a reason though as I'm sure those parts cost more to produce vs 1pc cast cranks and 1pc plain shell bearings.

 

[naticen]

Low oil environment of a 2 stroke needs rollers as far as I know. I definitely am not a 2 stroke expert at all though

 

[speedysprocket]

Yes, no dedicated oil system to pump oil into the babbitt like a four stroke. And if you've every had an oil pump go bad or some other oil casualty in your car, you know those crank bearings don't last long... They depend on the pressurized oil being forced into them to create a layer of oil, preventing metal to metal contact.
Anyways, here are the rods I want to try in my next crank rebuild...

 

[Aquaholic]

How much are those rod kits going for?

 

[speedysprocket]

$130 each. For Polaris engines though...

 

[makejetskiinggreatagain]

Maybe you need some rods out of a blunderjet