OST-053: Massaging a 20V Blacktop

[pack]

Thanks!

Seeing your work motivates me to just take it off and strip it......

[domi007]

Thank you for the answer about the crankshaft.
It is interesting to see Molnar Technologies, never heard of them before, but they look like serious guys. Based on the name I'm assuming the founder is Hungarian, just like me

[oldeskewltoy]

(03-03-2019 11:58 PM)domi007 Wrote:  Thank you for the answer about the crankshaft.
It is interesting to see Molnar Technologies, never heard of them before, but they look like serious guys. Based on the name I'm assuming the founder is Hungarian, just like me

I'll take your word for it (Hungarian).....

Molnar Technologies is a significant rod maker in the V8 crowd. I came across them a few years back. They are also the only ones making the 40/20 rod.




3 down... 1 to go....


Time to set up the flowbench, and get some #s........





More to come......

[oldeskewltoy]

Well... it has been forever... (well it feels like it).... and it no longer feels like a massage....

A new crank, a new set of rods(Molnar 42/20).... new custom (dome) pistons (11.5:1).....and MRP oil pan.... and the 20V Poncams are currently not available


We needed a crank, the first one we bought used... found out all the journals were a few ten thousandths (.000_") too thin... it might have worked for a dry sump race build... but for this engine my client (with my advice) bought a new crank.

The TRD rods (Jorge, your machinist has a good eye...) There was a dodgy bushing in one of the rods... to fix it properly would have required making the small end too thin... so the TRD rods got canned, and a set of Molnars were ordered.

JE Piston has a 11.5:1 piston.....



but... that ratio is with an .040" squish, our target is .032-.035, so I asked them to reduce the domes from 6.5cc, down to 4.2cc.





As far as oil supply, we decided a set of Toda pump gears, and an MRP pan





The Poncams....?????????? They've been delayed twice now... Tomei, and Kelford seem to be out of blanks.... and while Cat cams appear to have blanks, I'm not a fan of the Cat cams 20V cam timing.....


The head is ready for re-assembly.........




more to come....

[oldeskewltoy]

nearly a month later....

We sent out his crank, and the Toda oil pump gears to get WPC'ed - http://www.wpctreatment.com/





Now that they are back, bearing clearances are set to .0015" for the main bearings, and .0018" for the rod bearings - in the range specified by the FSM.

Additionally we now have a deck (.004" piston above), so the somewhat common .8mm head gasket is getting too thin with our deck - .028", so we have decided to get the Cometic .040"(1mm) gasket. This will allow a slightly more generous .036" squish (versus a .032" squish).


As to our new internals - mass savings of 20 grams... Blacktop stuff is pretty well optimized.




Now that all the machine work specifics have been finalized, this block is getting the Eastwood black coating I first used in OST-050.... so more time between postings....


more to come...

[oldeskewltoy]

so...... while waiting for the block coating.....


and since the oil pump was going to be opened up for the Toda pump gears.... a little work to "improve" on the OEM unit....





more to come.....

[oldeskewltoy]

oldeskewltoy Wrote:and the 20V Poncams are currently not available



The Poncams....?????????? They've been delayed twice now... Tomei, and Kelford seem to be out of blanks.... and while Cat cams appear to have blanks, I'm not a fan of the Cat cams 20V cam timing.....

Thank you Barry!

Kelford finally got 20V cam blanks, and so my client ordered a set of MRP/Kelford custom cams for 20V.






Here is the cam card for the Tomei 20V Poncams...




Note the differences...??


meanwhile.......

The block has another week before it can go back to the shop for assembly




more to come.......

[oldeskewltoy]

oldeskewltoy Wrote:Note the differences...??


meanwhile.......

The block has another week before it can go back to the shop for assembly




more to come.......

No one saw the differences??? Even something as vague as yeah.. a few more degrees, and a bit more lift..??? Oh well...


short block is now assembled...








and the head is now ready for assembly...





more to come....

[oldeskewltoy]

assembling the head.... special tools....






intake side first... 11 of 12 installed in this view....




more to come....

[oldeskewltoy]

oldeskewltoy Wrote:assembling the head.... special tools....

speaking about special tools... my mini micrometer gets to be retired as this dial drop gauge make the job far easier, and much quicker!




more to come....