ESE's works engine tuner

**adegnes** · 14th December 2016, 08:34

Originally Posted by wobbly

Yes it easily possible to have one side read zero, and the other wave about at 0.03 - as you say if the pin isnt true
in the crank wheel bore - I see this all the time.
Have you checked the crank, now its been installed and run.
Could be miles out if the press fit isnt sufficient.

The bushing urethane for my new engine mounts arrived today so I'll make those first and see if it changes anything. My current setup is metal on metal with no bushings, slightly loose so it doesn't bind up - just a test setup really.
If the problem is still there I'll tear it down and recheck the crank. The pressfit seemed fine tho, nothing like the crank in my last video.

Maybe I've made a too loose "slip fit" on my main bearings? I noticed they were easier to push onto the crank now than last time I had it apart.

**adegnes** · 14th December 2016, 11:04

I rechecked the crank from the video, sure enough the other side was running out big time... Doesn't matter really, cause I also discovered that I can easily move the webs with just my hands.

The thing is, all the crankshafts I've checked and trued before has been "just to be sure" cases, never done one that's been taken apart and (carelessly) pressed together, nor experienced the really cocked pin scenario.(until now)

I'm getting a second dial indicator, to see what's going on with both sides simultaneously, and start working up my cocked pin/web knowledge.

**Larry Wiechman** · 14th December 2016, 14:44

I rebuilt a small Suzuki crank that was impossible to true.

The crank halves each had a different stroke.

**adegnes** · 14th December 2016, 18:41

Originally Posted by Larry Wiechman

I rebuilt a small Suzuki crank that was impossible to true.

The crank halves each had a different stroke.

**jasonu** · 15th December 2016, 03:47

Originally Posted by Larry Wiechman

I rebuilt a small Suzuki crank that was impossible to true.

The crank halves each had a different stroke.

A dual stroke crank, you could enter several different classes with that one.....

**Ocean1** · 15th December 2016, 07:19

Originally Posted by jasonu

A dual stroke crank, you could enter several different classes with that one.....

A genuine two stroke, no less...

**adegnes** · 15th December 2016, 07:54

Originally Posted by Ocean1

A genuine two stroke, no less...

Genius! Why can't I come up with stuff like this!?

**Frits Overmars** · 15th December 2016, 08:09

Originally Posted by adegnes

Genius! Why can't I come up with stuff like this!?

Maybe it's the rum? Naah....

**adegnes** · 15th December 2016, 08:17

Originally Posted by Frits Overmars

Maybe it's the rum? Naah....

Of course, that's the reason, not enough rum!

**wobbly** · 15th December 2016, 11:54

Yep, been there as well.
Thats why having two dial gauges is the way to go.
If you set them up on the same axle and they both rise and fall in line with the big end, that means the stroke length
is different, side to side.
But if the inner dial is still and the outer is up and down,or vise versa then the pin is cocked in the press fit bore.
I have a pile of wheels for YPVS/Banshee, and had to get them all checked on a CNC measuring machine - the stroke length varied
up to 0.036 mm, so now I can match them in pairs.

I agree about the Rum as well - ditch that for some Scotch.Its made from grain so is practically muesli, a health food.

**adegnes** · 15th December 2016, 18:48

Originally Posted by wobbly

I agree about the Rum as well - ditch that for some Scotch.Its made from grain so is practically muesli, a health food.

Good point!

Started on the new engine mounts with cast-in urethane bushings.

**breezy** · 16th December 2016, 08:16

Adegnes, will the stiffness of the europhane bush, as opposed to a vulcanised rubber type bush, maybe still pose vibration problems.

?

**adegnes** · 16th December 2016, 08:47

Originally Posted by breezy

Adegnes, will the stiffness of the europhane bush, as opposed to a vulcanised rubber type bush, maybe still pose vibration problems.

?

That's a possibility, the stuff I've used is pretty hard. We'll see how it goes.
I fear that going too soft with the mounts could introduce enough flex in the system to screw up pulley alignment and flip/derail the belt. It doesn't take much.

**husaberg** · 16th December 2016, 16:32

Originally Posted by breezy

Adegnes, will the stiffness of the europhane bush, as opposed to a vulcanised rubber type bush, maybe still pose vibration problems.

?

Originally Posted by adegnes

That's a possibility, the stuff I've used is pretty hard. We'll see how it goes.
I fear that going too soft with the mounts could introduce enough flex in the system to screw up pulley alignment and flip/derail the belt. It doesn't take much.

What's the shore rating of the resin? 60? 80? shore A.