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Old 04-06-2005, 08:30 AM
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Piston Oilers

Does any one out there have any "hands on" experience with piston oilers in a BBC? There doesn't seem to be a lot of info about piston oilers in general on the net, especially for small and big block Chevys. BMW, Audi, Volvo and even Toyota use piston oilers (I assume for good reason) The BMW's piston oiler used on the M3 even has a pressure valve in it so it isnít a detriment to low RPM oil volume and pressure.

What I am looking for is info with regards to how the piston oilers affect oil pressure, both at idle and at high speed. Can a hi volume oil pump keep up with the additional oil volume required by the piston oilers? (Especially at idle??)What oilers do you use? (I have seen the generic kit offered by BLP and MLR and it doesn't impress me. All it is, is a screw in "orifice" that would squirt oil at all RPM's.

Thanks in advance.
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Old 04-06-2005, 08:49 AM
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piston oilers

early 289 fords had a hole in the conrod and upper rod shell to lube the piston which worked fine withe no oil pr drop. i think it was removed to cut oil consumption or poss cost .
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Old 04-06-2005, 10:31 AM
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The amonut of oil shot through the hole is less than the amount of oil lost past the bearing. Although a small increase of oil temp is present. An increase in windage is also a factor for high RPM competition engines.
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Old 04-06-2005, 11:21 AM
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My 66 289 has those exact holes that were mentioned in the connecting rods. They point or are directed to the bottom of the piston. Does it work? I dont know. I run an oil cooler so if anything it might help cool the underside of the piston.Who knows.
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Old 04-06-2005, 04:00 PM
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Piston oilers are drilled in to the main saddle connecting to the oil galley and a jet is put in .Shooting pressurized oil to the piston crown
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Old 04-06-2005, 05:01 PM
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I know in diesel engines they are very effective in keeping down piston temp and dont seem to use much oil at all. Though as mentioned it is going to put more oil into the air in the block, Ive seen diesels running the hole in the small end of the con. rod and the small tubes running off the main webs that spray oil, i guess its all about whats out there for retro fit. if you are concerned with having hot pistons it might be worth while. good luck.
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Old 04-06-2005, 05:21 PM
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This was discussed a short time ago.
http://hotrodders.com/forums/t59943.html
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Old 04-06-2005, 10:56 PM
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and here:

http://hotrodders.com/forums/showthread.php?t=52758
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Old 04-06-2005, 11:20 PM
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chevy did it with the small rods on 327's but discontinued it with the large journal rods i believe for strength issues and the oiling was overkill.the pres. drop wouldn't even be noticeable.
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Old 04-06-2005, 11:25 PM
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I have found (through a thorough internet search) that BMW uses piston oilers on their M3's and Porsche, Audi and Volvo use them also.

I just found this article in the May 2005 issue of Hot Rod magazine showing the new Northstar V8 and the piston oilers it uses which enabled the engine to use 3 more degrees of advance for a gain of 18 foot pounds of torque so they must work if the OEM's are using them.

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Old 04-07-2005, 09:47 AM
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I don't think the benefits are that great in respect to the work involved in installing them in a BBC. I would think that, with all the aftermarket blocks available, somebody would have included them in the race-type blocks.

tom
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Old 04-07-2005, 01:42 PM
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piston oilers

cant say forsure on gas engines but cat has used piston oilers for years i have saw cases where the spray jet was miss alighened or bent while cyl kits installed these usually resulted in piston sesures even durring dino runs , they can only help on high pro gas engines. i have noticed that 302 fords have way more cyle wear than 289s that have piston oilers, at high milage.that is..cliff
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Old 04-07-2005, 02:36 PM
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Quote:
Originally Posted by cliff tate
cant say forsure on gas engines but cat has used piston oilers for years i have saw cases where the spray jet was miss alighened or bent while cyl kits installed these usually resulted in piston sesures even durring dino runs , they can only help on high pro gas engines. i have noticed that 302 fords have way more cyle wear than 289s that have piston oilers, at high milage.that is..cliff
I think that is more of a result of a shorter rod than the rod squirt hole.

tom
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Old 04-08-2005, 09:25 AM
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piston oiler

machine shop, you could be corect re longer rods, that is why the 302 i run covers both points of vew 289 rods with oilers in or with 302 crank of course a litle chopped of the top of the pistons, only problem is i may not live long enough to find out. cliff
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