DISI-MZResponse 2.0

Man you set out to do something completely different from everyone else with this build and you did it



You found ways to trash the engine that had never even been considered


Blowin shit up with science
 
In before thread lock!

The pics are kind of shit but whatever, fite me.
General block shit:
  • Main bearings:
GirdleMains1.jpg GirdleMains2.jpg GirdleMains3.jpg

  • Block and gasket had oil all over the place for some reason (sat for months before being pulled, was not turned upside down before head was removed today):
SlipperyWhenWet.jpg BlockOil.jpg

  • Headwork:
Chocolate Rain.jpg


Cylinder 3 stuff:
  • Gross (they all looked like this)
Cyl_3_Gross.jpg
  • Rod bearings (not sure if this is good or bad or what):
Cyl_3_Rod_Bearings.jpg Cyl_3_RodBearings2.jpg


And now...
*Drumroll please*

Cylinder 4 fight club:
  • Extra exhaust flow
Cyl_4_FightClub.jpg

  • Further customized piston
Piston_4_1.jpg Piston_4_2.jpg Piston_4_3.jpg Piston_4_4.jpg

  • Cylinder wall not even broke in yet
Cyl_4_CrossHatch.jpg


Discuss!
*That's an order*
 
Looks like you had some detonation on that one cylinder
 
Probably oiled up fuel, but remember, that's also the cylinder that ate the spark plug.
 
So then what the hell went wrong? Did the rings just not seat?
 
Clearly not, if you look at the pic of cyl4 wall. Still has the cross hatch. Also, all the pistons appeared to have the gaps closer than 180 deg off, suggesting that they were either rotating at different speeds or one wasn't rotating at all.
 
Piston rings are going to do whatever the hell they want once you fire the motor. People worry too much about where the gaps line up

They would spin differently, they are different materials and profiles and subject to different degrees of loading from combustion

Check the bore size
 
This was a brand new block, measured using a bore gauge several times at several spots and several depths into the bore; IIRC the difference between the narrowest measurement vs the widest measurement across all cylinders/measurements was something ridiculous like 0.005"
 
So should be safe to assume the cylinders were in spec. What about the piston
 
Custom made Wisecos with Wiseco rings. I did not have the bore honed to their spec, but I don't know what factory spec is so... Anyways, I've heard there are ring issues with Wisecos (after the fact) and lo and behold!

I still have spec sheets for both rods and pistons if you care, but not sure what it would tell you other than "what the fuck was he thinking?"

Lol
 
I'd rather not release them publicly as someone may try to duplicate this build and wind up running into even worse issues than I did. I can send them to you and buns though if you want.
 
Just watermark them with do not use and post that shit
 
Have you measured the pistons to make sure they were made right?
 
I have not, but at the time I assumed Wiseco was a reputable company.
 
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