Which prop bolts do I have?

Try this type of torque adapter for the nuts on the engine side (check size).  

Use them placed perpendicular to the torque wrench handle for accuracy.  

https://www.napaonline.com/en/p/CHTTA38113M?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Catch-All&campaign_id=6478877959&adgroup_id=79272987338&adtype=pla&gclid=EAIaIQobChMIg4n3sfi1_AIVMgWtBh2ANAFAEAQYASABEgLojvD_BwE&gclsrc=aw.ds&

Those bolts you are showing are not metric, but standard thread. Those are 7/16". Use a "Crows Foot" wrench end for your torque wrench. The 6 through the hub and flange bolts just need to be loosened. Just so you can turn them by hand. Do these first. Then the brass bolts directly on the outside of Warp Drive hub need to be loosened. Loosen the outside bolts just so they can also be turned by hand. Leave all these in place. Just loosen them. Then when you adjust the blade loosen the inside bolts just enough so you can turn the blade with just a tad of force. All you will need is open ended wrenches. If you make them way too lose then when you go to snug things down the pitch accuracy may change. So you're going to leave the flange through bolts lose and the out prop hub bolts lose. When the blade is set where you want it snug the inside hub bolts. Don't torque them yet. Then rotate the prop and do each blade the same. Then after the pitch is set rotate each blade one more time and check your pitch accuracy on each blade and make sure nothing moved. Once that's done then torque the main through the hub and flange 13mm bolts first. Once those are all torqued then torque all your prop hub nuts to spec which I thing if memory serves is 174 in/lbs.

Crows foot adapters. You can buy one or a small set. You can get them in metric and or standard.

 https://www.amazon.com/s?k=7%2F16%22+crows+foot&crid=31NDBVTMA4NJE&sprefix=7%2F16+crows+foot%2Caps%2C417&ref=nb_sb_noss_1

Thank you so much, Jeff and Roger. “Right tools for the job.”

I think we got it set right. I was trying to reduce pitch to get RPMs up. One blade seemed off from other two by a couple degrees, so that might reduce vibration a bit, too, I’d guess? We’ll see if I got it right in tomorrow flight test.

Interesting stuff.

7/16s seems big. Are you sure it’s not 5/16s (8mm)

I admit I’m not familiar with Warp Drive props

Ed

The Warp Drive prop is a fairly heavy prop and really needs to be dynamically balanced. I would highly recommend you balance it. That can easily be a cause of vibration. One prop blade out of pitch from the others can also cause vibration.

Next a good prop pitch for you is a 5600-5650 WOT rpm at your average altitude. That said Warp suffers in climb compared to other props at the same WOT settings. In cruise it seems to be okay. Anything under 5500 rpm at WOT is over pitched and there are no redeeming qualities being over pitched. You lose climb, cruise, fuel economy and higher engine temps.