slowpoke

Still ooo but thanks for the flank gap definition. Don’t know that yet. Is there a spec? I’ll see if i can find it in the manual on my flight home.  Here are some more pics i pulled.  4 sides of same piston prior to any cleaning. Don’t know if the skirt scratches are cosmetic or have depth. Don’t remember any marks on the bore.  Don’t know why this engine was pulled but maybe burning lot of oil?

Also, i think JOHN76 is right; these are likely Mahle pistons:  the M w/ the numbers top and bottom Mahle describes that mark as their quality symbol - likely time of build or lot number, and alas they don’t look anything like VISIONAUT’s 9.5:1

I’m out on business this week but when I’m back I’ll measure the piano and put up some more pics. 

Pulling apart a spare engine for my first rebuild - this is an example of the pistons. Anyone recognize any of these markings?  I dream they are good enough to use again and are 9.5:1 or something like that. For the first one I pulled the top two rings moved easily and the oil ring did move a bit so that’s good. There looked like blow by / carbon on the sides but not to bad. The bore was really smooth with no lip at the top. 

Oh, and Pablo’s idea of set all to 12 and check sounds like a great one!!!  Ingenious!

Hey, you said that it sounds like no fuel for 5-10 cranks and then the next cranks sounds like it’s trying to start…. Randomly, is there a fuel leak (or i guess carb leak that drains the bowl?). If my car sits for a while (couple weeks) then it seems to take a bunch of cranks to get going.  Then it’s fine.  I spray a bit of starter fluid inn the air cleaner and it fires right up….  So…….   Might try that. If a bit of starter fluid makes it start right away then it might not be a 123 problem…. ???

Just tow the whole thing into your backyard, get some tree branches to cover it and hide it from the wife, and then consider it an extension to your garage junk drawer when you can’t find that one part.  

Hey, still have a block?  Let me know.  I might be in the area late next week.

RoccoGilroy,  still have the block?  I can come get it…. I’d even do a 24pack…

Ah. That totally sucks. But you can see it. The piston box says m10 e21 and the head says e12.   That’s the problem I guess. 
 

This get sold?

Wow, fun,  what’s the capacity compared to the standard?

Hey,  you still got all this stuff?   I was thinking of refreshing my engine this winter, this might be another way to go about it… i wouldn’t want the side drafts but maybe the rest… what compression ratio were you trying achieve?  I’m up in the SF bay area but as they say…. Have a pickup.

thanks

Tell me more. Why didn’t it suit your needs. What was it like?

watching this thread!!!  Good luck Bibm5!

check out the Alfa GTV's.  i would say our 70's nemesis. Had one of those.  they've gone up a bit in price as well...  conversely, it would seem there are very few bargains AT ALL in Craigslist today...  inflation, grrrr..... 

Ok, just to summarize:

- e12 head

- 9.5CR

- for 89.22mm bore

I think I’ve got an e12 head, now you’re encouraging me to pull my head and figure out if my block has been bored out.

did i get the above correct/

Let’s get a list of the items that were stolen…. Then we can all be on the lookout for them!  

Looking for reputable shop suggestions for head and block work in the NorCal region.  I’m in South Bay would would drive if needed..

Engine’s really tired and I’d like to rebuild and pep it up some.  Looking for more compression (and cam and and…)  - seems like 9.5 or 10:1 is the most i should go on CA pump gas, and that means new pistons.  Am i getting that right?  The car’s mostly used for track days so more pep is always better.  I’d love to be able to, heaven forbid, pass a Miata.  Turns out the 70whp i have isn’t getting it done…

thanks,

Post refresh what kinds of compression you talking?  I’ve got a cam i could throw at it but I’m looking for “more than stock” compression…. Would this work?  I’m in the Bay Area and ideally we could meet in the middle and i could drop it off at a shop on the way home!  My engine needs a refresh but “swap in a new one” seems better than “pull, fix, reinstall”.  

Thanks

All, I’ve been totally “burned” buying used pistons.  Brandon, I’d propose you get the rings out and do some clean up or let folks know that they are quite possibly trash.  It’s hard to tell from a picture  good or not…. At least one of those looks similar to one of pistons that i bought which was at best a paper weight.  

though i do thank you for helping keep parts in the stream!

Willing to ship to west coast?  I’m checking to see if this works for me.  My engine’s mostly an oil burning furnace at this point…. No power, lots of smoke…

yep, still available. send me a PM and we can talk.

hey, still have the seats?

What would be the compression ratio?

If i was going to keep my car I’d consider it. How are they different from the....   e21 longer control arms?  That’s what i was looking at.  Can you use stock fenders?  I was hoping to get the additional camber without cutting.. I’d accept some interior fender rollling though.