madkaw

I do like that race sport header ! That’s a ceramic coat on the race sport ?

The ceramic coating works well - no doubt. I am still impressed after years how well the coating has held up and it helps beat the heat. I personally don’t like MSA as a business, but the header works . I’ve heard some issues with the flange and some folks were having issues with them sealing .

So your Fuji is like the GreddyTrust shape? Looks like an equal length but it’s not really . I’m looking at a used Greddy and looks identical but it’s blue :). Let me know if you decide to let yours go. I just want something that has side by side dual outlets . Currently have the MSA .

I like Duffy’s set up for sure . His is prettier ! Heres the LS version - d-585 truck coils to be exact

It’s sad . Our troops don’t need another winless war.

I was too cheap since my guides were good. I imagine he waits to do the valve job after wards . He can get nice and tight on those seats and if the grinder skips or gets scratched the valve cutters will clean it up. I would also think he put the larger seats in and is blending before doing final valve job.

Primed and ready for 2020!

10.5:1 is what it was designed for with a 39cc head

The MN47 has found a new short block . Now the engine is a MN47/42 - 3.2 liter.

FYI- my last engine I was shooting for .021 clearance . I based everything on the Felpro to compress to .049 or 1.25mm .

If you have the money - I would stay EFI . Buy one of the kits that some of these Megasquirt dealers are selling for our cars . Almost plug and play - cleans up your wiring , keep your stock intake and maybe injectors too, plus the pump should be correct .

There is room but the crankshaft has to be in a certain position so no crank throws are sticking down around the rack and pinion area.

If you have .026 piston pop out and you use a stock Felpro gasket which is .049 , that gives you .023 . That would be a good number !

Don’t mind sharing my mistakes . I’ve learned reading about others too. It would be easy to blame my cheapy Ebay Perfect Circle old stock rings that gapped bigger than stock, but that’s not the real reason. Can’t expect rings to seal on a sketchy bore. In the end, I’m glad to know why this stuff was happening and not blame it on cheap parts

Don’t mind sharing my mistakes . I’ve learned reading about others too. It would be easy to blame my cheapy Ebay Perfect Circle old stock rings that gapped bigger than stock, but that’s not the real reason. Can’t expect rings to seal on a sketchy bore. In the end, I’m glad to know why this stuff was happening and not blame it on cheap parts

Yes - still lucky to be fortunate enough to play like this . And yes oil was getting by the rings somehow. My machinist is an old racer and has seen everything . He actually went thru the same thing . A ring defect was allowing oil to contaminate the combustion mixture . THe fact I’m pushing 225 psi amplifies the condition I believe . Im going to get some larger pistons and salvage the engine - AFTER I finish and get the 3.2 running .

#6 - where I had most if the issues . There was also a spot on #5 .

Well somehow I missed this bad spot at the bottom of my bore . Since this project has has spanned over so many years I cannot remember specifically what order I did or did not do things . I ran a cheap store hone in these cylinders many years ago and I obviously missed that this spot didn’t clean up. The hone marks hid the spot enough, and I didn’t look close enough. Rings aren’t going to seal against that wall. Amateur miss for sure , but live and learn. I moved on to the 3.2 , so maybe I could start another thread for now or just keep it here. The thread was more about the MN-47 , which will be going on the 3.2

Well it doesn’t even phase me that I’m pulling this motor again. It is a bit humbling , but hey, you play you sometimes pay. Pulled the intake to find oil in 5&6 runners - again, so not the guide seals . So it’s either seeping around outside if guides or rings are failing . Comes out today and it’s fate will be determined . Head will be broke down to check more thoroughly for oil seepage. Block might just get swapped with a good OEM 54 sitting here on a stand- untouched since Japan and with perfect wear. Hoping this will only be a one week venture . I need to move on to my 3.2 build .

My perfect circle rings came out with bigger gaps also - maybe because the cylinders were honed . I think your gaps would be okay . No where near wear limits . I would think ANY markings would identify top. Usually packages also identify rings by any type bevel or taper cut into the ring .

Disregard - mine isn’t worth saving . good luck

Pretty sure I saved a really clean set up somewhere. Most threw away the air pump stuff, but this was so clean I’m sure I held on to it.

Paper gasket or RTV gasket maker. Just clean both surfaces really well

You can buy them new pretty cheap

Coolant pressure test should really pinpoint the issue . Watch your pressure as the engine runs . If it starts to rise , start pulling spark plug wires one at a time until you find the one that stops the pressure from rising .