Vented oil caps
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Joined: Feb 2002
Posts: 382
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From: Orlando
Vehicle: 01 Tiburon
Vented oil caps
I was searching on ebay last night for a new oil cap and I came across this. I know its not for Hyundais but I was wondering if this is legit or if its bs.
http://cgi.ebay.com/ebaymotors/VENTE...Q5fAccessories
http://cgi.ebay.com/ebaymotors/VENTE...Q5fAccessories
Technical: All engines have a small amount of combustion pressure that escapes past the piston rings into the crankcase and valvecover which are internally conected through passageways. This blow-by must be vented properly in order to prevent seals from blowing out, and oil leaks. This also helps to reduce pumping losses and improve piston ring seal. As you increase your power levels via turbo-charging or what have you, this crankcase pressure can rise dramatically, causing some serious problems.
A pcv valve is efficient only in a stock engine at low rpms. At the power and rpm's we see in our honda & acura engines today, the pcv valves cant get close to keeping up. In addition they just plain won't work in a turbo car, because the intake manifold recieves boost instead of the usual vaccume. Pcv valves also re-route the oily spent fumes back into the intake.
Adding this vented oil cap can vent as much pressure as running two -10 AN lines off of the valvecover to a breather/catchcan tank, which is popular and efficient, yet expensive and labor intensive operation. Another popular crankcase venting setup is to add two fittings to the back of the block and run the lines up to the Breather/catchcan. This sometimes results in oil traveling up the lines on acceleration filling up the breather tank and spilling out on to the track.
If you are considering trying to create a vaccume in the crankcase via exhaust scaveging or recirculating to the intake. Keep in mind It has been tried many times with very limited success. The best we can hope for in these modern day high reving hot rods is atmospheric pressure. Venting is the best solution, and on investigation you will find that 98 % of the imports today running 8's 9's and 10's are all running vented breather setups.
This oil cap is not carb approved and is for Race Use Only. That being said, it is very easy to switch out with a regular oil cap when needed for emissions testing Ect. This cap can be used with or without the stock pcv system and It will even benefit a bone stock motor.
One good test you can do to see if you may benefit from this oil cap is to check how much blow-by you have at an idle. To do this you can simply remove your oil cap while your engine is running and place your hand over the filler cap hole . If you feel pressure buildup blowing against your hand its time to invest in a Vented Oil Cap!
Just spin it on and go!
A pcv valve is efficient only in a stock engine at low rpms. At the power and rpm's we see in our honda & acura engines today, the pcv valves cant get close to keeping up. In addition they just plain won't work in a turbo car, because the intake manifold recieves boost instead of the usual vaccume. Pcv valves also re-route the oily spent fumes back into the intake.
Adding this vented oil cap can vent as much pressure as running two -10 AN lines off of the valvecover to a breather/catchcan tank, which is popular and efficient, yet expensive and labor intensive operation. Another popular crankcase venting setup is to add two fittings to the back of the block and run the lines up to the Breather/catchcan. This sometimes results in oil traveling up the lines on acceleration filling up the breather tank and spilling out on to the track.
If you are considering trying to create a vaccume in the crankcase via exhaust scaveging or recirculating to the intake. Keep in mind It has been tried many times with very limited success. The best we can hope for in these modern day high reving hot rods is atmospheric pressure. Venting is the best solution, and on investigation you will find that 98 % of the imports today running 8's 9's and 10's are all running vented breather setups.
This oil cap is not carb approved and is for Race Use Only. That being said, it is very easy to switch out with a regular oil cap when needed for emissions testing Ect. This cap can be used with or without the stock pcv system and It will even benefit a bone stock motor.
One good test you can do to see if you may benefit from this oil cap is to check how much blow-by you have at an idle. To do this you can simply remove your oil cap while your engine is running and place your hand over the filler cap hole . If you feel pressure buildup blowing against your hand its time to invest in a Vented Oil Cap!
Just spin it on and go!
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Joined: Sep 2001
Posts: 10,795
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From: Pflugerville, TX
Vehicle: 2000 Elantra
That they are saying the OEMs fail to make emissions components on stock cars work properly at all engine speeds makes me suspicious right off the bat.
A vented oil cap would vent crankcase pressure. Duh? 99.95% of all cars in the world will not need more PCV action than can be had from the stock PCV holes.
Waste of money, for almost all cars.
A vented oil cap would vent crankcase pressure. Duh? 99.95% of all cars in the world will not need more PCV action than can be had from the stock PCV holes.
Waste of money, for almost all cars.
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Joined: May 2001
Posts: 7,166
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From: San Antonio, TEXAS!!!
Vehicle: 01 Tiburon Turbo, 99 Tiburon F2E, 2013 Avalon XLE Touring
That they are saying the OEMs fail to make emissions components on stock cars work properly at all engine speeds makes me suspicious right off the bat.
A vented oil cap would vent crankcase pressure. Duh? 99.95% of all cars in the world will not need more PCV action than can be had from the stock PCV holes.
Waste of money, for almost all cars.
A vented oil cap would vent crankcase pressure. Duh? 99.95% of all cars in the world will not need more PCV action than can be had from the stock PCV holes.
Waste of money, for almost all cars.
This cap appears to work just fine. It's like adding a hole in your crankcase without actually drilling. But, I'm wondering how it keeps oil from blowing out, or getting clogged by oil. If there's some kind of filter on it, then it's definately going to need a periodic cleaning.