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Post by widetrack212 on Jan 15, 2015 16:24:57 GMT -5
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Post by widetrack212 on Jan 15, 2015 16:25:53 GMT -5
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Post by aggieengnr on Jan 16, 2015 10:39:16 GMT -5
I am very eager to see your outcome from this once you have it back together and running. Keep us posted! Good to know they are already provisioned to supply oil cooling to the pistons.
I have a question out of curiosity and lack of knowledge about the subject. How thick is your ceramic coat going to be on top of the pistons? If you add back the .035" thickness with ceramic, wouldn't that raise your CR back to where it was?
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Post by widetrack212 on Jan 16, 2015 15:53:11 GMT -5
I am very eager to see your outcome from this once you have it back together and running. Keep us posted! Good to know they are already provisioned to supply oil cooling to the pistons. I have a question out of curiosity and lack of knowledge about the subject. How thick is your ceramic coat going to be on top of the pistons? If you add back the .035" thickness with ceramic, wouldn't that raise your CR back to where it was? I plan on keeping everyone posted with everything that's done to it so if it turns out good others have something to maybe base there's off of or learn from! I had no idea that they did but it mad me alot more comfortable with turning up the fuel and putting a turbo on it. Ceramic coating is only just enough to give the components that you are spraying just enough to change that components color to the color of the coating so in reality maybe .001-.002 thick and at .035 taken off the tops it puts the compression ratio at 17.99:1 (18:1) Your coating is very thin and not much is needed. I will keep posted about progress. |
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Post by 83rangerguy on Jan 16, 2015 15:54:01 GMT -5
The most interesting thing out of all of this stuff is that these little 2.2l's already have oil cooled pistons! The rods are drilled from the crank to the wrist pins, then there is an oil galley cut into the rod around the wrist pin going to a hole drilled at the top of the rod that sprays directly on the bottom of the piston! That's pretty cool! I didn't know that.....but I don't see the hole on the wrist pin end of the rod where the oil exits??? |
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Post by widetrack212 on Jan 16, 2015 16:09:46 GMT -5
The most interesting thing out of all of this stuff is that these little 2.2l's already have oil cooled pistons! The rods are drilled from the crank to the wrist pins, then there is an oil galley cut into the rod around the wrist pin going to a hole drilled at the top of the rod that sprays directly on the bottom of the piston! That's pretty cool! I didn't know that.....but I don't see the hole on the wrist pin end of the rod where the oil exits??? I'll take another picture sometime tonight, it seems to have a little slit in the bushing on the side where it has oil come in.. I might knock the bushing out of the rod tonight to take pics and post them later. I think the bushing on the side against the rod has a little channel from the rod to that little slit in the bushing where the oil comes out of. |
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Post by 83rangerguy on Jan 16, 2015 16:34:55 GMT -5
[/quote] I'll take another picture sometime tonight, it seems to have a little slit in the bushing on the side where it has oil come in.. I might knock the bushing out of the rod tonight to take pics and post them later. I think the bushing on the side against the rod has a little channel from the rod to that little slit in the bushing where the oil comes out of. [/quote]
Ok, I think I understand it now...never knew these 2.2's had oil cooled pistons! learn something new every day. If you can get more pics great, if not don't worry about it...thanks for the awesome info!
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Post by widetrack212 on Jan 16, 2015 22:43:15 GMT -5
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Post by gradyc on Jan 16, 2015 23:52:47 GMT -5
I think pictures of the crankshaft end of the rod from different angles would be helpful.
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Post by 83rangerguy on Jan 17, 2015 12:16:25 GMT -5
Thanks! I get it now, there's a passage (galley) cut into the wrist pin end of the rod which directs the oil to the top hole in the bushing, hence the reason I didn't see a hole in the bottom end of the bushing, because there's no need for one with the oil galley cut into the rod, correct? I tried to find a pic online without the bushing in the rod so the oil passage would be visible, but couldn't find one. But I did find these two, one showing the oil hole in the wrist pin bushing, and the other showing the oil hole in the crank end. This is pretty cool stuff! I'm surprised Perkins was doing this nearly 40yrs ago in a non-turbo diesel. I guess it's just another reason these 2.2's are so bulletproof and have the reputation they do.
 
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Post by montana on Jan 17, 2015 18:40:11 GMT -5
I've owned my truck since '97 and had no clue I was driving around with oil cooled pistons, go figure! I even have the factory Mazda engine manual with an oiling schematic and it doesn't show the oil passages up through the connecting rods, but the pics above don't lie. Nice info to have. Thanks.
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Post by widetrack212 on Jan 17, 2015 22:31:50 GMT -5
Thanks! I get it now, there's a passage (galley) cut into the wrist pin end of the rod which directs the oil to the top hole in the bushing, hence the reason I didn't see a hole in the bottom end of the bushing, because there's no need for one with the oil galley cut into the rod, correct? I tried to find a pic online without the bushing in the rod so the oil passage would be visible, but couldn't find one. But I did find these two, one showing the oil hole in the wrist pin bushing, and the other showing the oil hole in the crank end. This is pretty cool stuff! I'm surprised Perkins was doing this nearly 40yrs ago in a non-turbo diesel. I guess it's just another reason these 2.2's are so bulletproof and have the reputation they do.
View AttachmentView Attachment Correct the oil being fead to the rod bearings is then pushed up through the rod into the oil passage cut into the rod behind the bushing then it is pushed into the galley in the rod bushing lubricating the wrist pin and spraying on the bottom of the pistons! My Dad's uncle is a major Perkins fan and he's always talked about how tough and overbuilt the perkins engines are, now I see why! I actually took my rods over to him and he couldn't believe how big the rod bearings were, he said they looked like rods and bearings that would be in a farm tractor! Honestly I think with proper fueling, air and custom parts (cams, pushrods, valves. Ect.) these engines have the capabillities to be dependable with 150-200hp. The botom end and heads are very overbuilt and strong, the design is astonishing. I would love to see mine one day above 150hp at the wheels. I might be setting the bar quite high, but I think it's a realistic goal. I can't wait to see what it'll have with just these current modifications! I'm hoping for 90-110hp. |
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Post by widetrack212 on Jan 17, 2015 22:36:20 GMT -5
I've owned my truck since '97 and had no clue I was driving around with oil cooled pistons, go figure! I even have the factory Mazda engine manual with an oiling schematic and it doesn't show the oil passages up through the connecting rods, but the pics above don't lie. Nice info to have. Thanks. I'm really suprised nobody ever noticed it before when they were rebuilding an engine or something! Really shows that you do learn something every day! One guy once told me you can't always trust books until you tear it apart and examine it, turns out he was right! I think discovering that the pistons are oil cooled might make some people consider putting a turbocharger on theres and putting a little more fuel to the fire.  |
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Post by montana on Jan 18, 2015 6:56:33 GMT -5
To my knowledge you're the first. I certainly didn't know it, and I've never read it elsewhere on here.....so well deserved kudos to you.
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Post by gradyc on Jan 18, 2015 11:54:51 GMT -5
From what I can see in the pictures the hole in the top of the rod is so oil can feed the wrist pin by gravity from the top.It is hard to see from the pictures that you have taken so far but the piston oil hole is near the crank end on one side edge of the rod. Push a wire through the hole in the crank end and you will see where it comes out the edge.
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