Building my 2.0 Duratec / MZR engine, PART 2 pistons assembly, rings gapping and bearing clearances

Part 2 from my most recent engine build where you can see my steps through engine rebuild for my track car. Its combination of Ford Duratec, Ecoboost and Mazda MZR engines. In this episode im showing how i did measure, prep and assembly rings, pistons and rod bearings.
Piston MOD video:
• Duratec/MZR oil consum...
Disclaimer.Its not DIY or tutorial, trying to copy actions you see in that video might results with critical damage to your engine. Engine build must be done by experienced engineer with safe and clean environtment.
tags
#mazda #mx5 #duratec #mzr #engine #piston #rod #assembly #track #ecoboost #mx5nc #ncmiata

[@danielleszczynski5198]

Great video! Btw where did you get the data for the conrod bearing clearances ? Seem to be getting loads of mixed answers.

[@watsonj217]

What size pistons and rings did you use? Are they standard or oversized? And also what grit honing tool did you use? Only asking as I'm stripping my duratec down the weekend out of my st150

[@ColdieGarage]

I've used 220 grit i believe, it's absolutely not the correct way of doing it but just for adding bit of roughness for new rings to seat faster worked well. I went with standard pistons, but they've measured very close to standard size. Piston rings for that particular engine was Hepotile 87.50mm, standard size for 2.0 Duratec, and I did still have to grind them slightly down to get them up to spec

[@watsonj217]

@@ColdieGarage thank you for reply, cylinder 2 and 3 have 10-15psi whereas 1 and 4 were alot better, should I hone the cylinder's then measure with dial gauge or the other way round? Also, did you check/adjust valve clearances?

[@Oldpuck81]

What HP and RPM are you hoping to hit w/ this 2.0? What comp ratio?

[@Tremontvolleyball]

Did not see the part number for the rod bolts. Can you post please?

[@Archiegser]

Well done, kept it simple with good comments coming up on screen.

[@leonstanford3335]

Hey mate, glad I’ve stumbled across your videos as I’m beginning to build a forged st150 turbo conversion, I want to be able to run high boost and my cylinders have been rebored to 88.5, would you be able to give some guidance to ring gap sizes for the medium/high boost? Thanks

[@ColdieGarage]

I would stick with the chart provided by your piston manufacturers. I have no experience in boosting Duratec yet to say what worked best for me, but on BMW where i ran Wiseco pistons I've gapped rings accordingly to their provided chart depending on application and level of boost. It's simply, cylinder bore x value provided for specific application in inches.

[@leonstanford3335]

@@ColdieGarage thanks, I’ve gone with wossner for pistons, will follow the instructions they provided with the product in that case

[@bartoszjarosz9364]

2:25 you mean 120 degrees?

[@ColdieGarage]

Yes exactly! I did exactly that but described wrong. You're right, nicely spotted 👌

[@davidwoods6821]

Will the clearances be the same with the ARP bolts if torqued differently to the std bolts?

[@jeromepiresgutierrez5971]

Hi ,torq balance shaft?