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Help a lady racer out!

 
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Old 05-16-2016, 12:06 AM
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Help a lady racer out!

Im new here and I need opinions. I have a 1994 prelude 2.3 DOHC that I race on a dirt oval track (left turn). I have a problem with it puking oil out of the Breather hose going into the air intake which causes a huge smoke screen and loss of oil, obviously. We have temporarily put a drain/overflow hose on it so it doesn't enter the intake but I'm still losing too much oil I'm afraid it will end up blowing up. I believe this issue is arising from the oil pump being on the drivers side and so when the oil is forced to the passenger side (where the Breather hose is) it us unable to drain down into the engine properly from the head so it has to go somewhere. Any ideas on how to correct this? We are contemplating drilling a hole on the drivers side on the valve cover to recycle to oil back into the engine but that is a last resort. Thank you.
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Old 05-16-2016, 06:52 AM
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Re: Help a lady racer out!

That's strange, there is a baffle under the valve cover which should protect the intake breather from being directly sprayed with oil. Even with heavy cornering there shouldn't be THAT much oil flying around up there. It is much more common for oil to be blown into the intake through a faulty PCV valve. That is unless there is some pretty severe pressure being built up. It would be worth checking the valve clearances. It'd be worth checking the compression too.

Worst case, throw a big baffled oil catch in between the valve cover and the intake and empty it back into the motor after each race.
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Old 05-16-2016, 10:48 AM
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Re: Help a lady racer out!

how healthy is the motor? you could have bad piston rings.
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Old 05-16-2016, 11:38 AM
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Re: Help a lady racer out!

Engine is pretty much brand new. No blow by, great compression and literally valves were readjusted before my last race. The pcv wasn't hooked up right the first time I drove it causing the oil to go into the intake before the overflow hose was put there because of too much pressure. I replaced the pcv and that is working great now. I have to check to make sure the baffle is still in tact.
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Old 05-16-2016, 02:44 PM
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Re: Help a lady racer out!

How much oil are you losing over the course of a race (20 minutes?)?
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Old 05-16-2016, 03:14 PM
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Re: Help a lady racer out!

In a 15 lap main event I lost well over a quart. During an 8 lap heat I lost about half a quart.
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Old 05-16-2016, 06:14 PM
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Re: Help a lady racer out!

Get a catch can, hook it up to the breather and too the intake port on the intake pipe, worth a shot
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Old 05-16-2016, 08:43 PM
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Re: Help a lady racer out!

I'd like to get the oil back into the engine.
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Old 05-16-2016, 10:03 PM
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Re: Help a lady racer out!

The location of the oil pump shouldn't make a difference -- the oil goes to the filter first, then to the pistons and the cylinder head. The head might only drain on that side, though (don't have the car handy to check), which would make difference in a more-or-less constant left turn.

The simplest thing may just be to run it as a partial loss system -- put a catch can on the intake side, and run a slightly large pan to avoid running out of oil. Not the elegant solution, but.... You could try putting extra baffles in the valve cover, to prevent the oil from moving down to that end, but I don't know how well that'll work.

The elegant way to do it would be to modify an oil accumulator to catch the oil out of the intake side, and pump it back into the pan. I don't think a simple drain tube would work -- you'd need something to pump it "uphill" against the g forces in the turn. But with an Accusump or something similar, you could pump accumulated oil back into the pan when the system detected a pressure drop, or if you're pretty sure of the loss rate, just empty the accumulator at a set time interval. As long as you're not radically overfilling the oil pan (which would drag on your crank, and cost you power), that could work.
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Old 05-17-2016, 12:54 AM
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Re: Help a lady racer out!

Thanks jamie. There is enough pressure that the oil is spraying out if the overflow hose. The sprays goes to the ground but it was bad enough that it sprayed down the side of my car to the back wheel so we think it may have enough pressure to put it back in the engine. We are going to try adding a port on the right side of the head and run a hose from the intake side back into the head on the timing side. If this don't work we thought maybe we can plug the intake side and just put a mini filter over the new port on the driver side to allow the engine to breath. Any thoughts on this,
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Old 05-17-2016, 09:29 PM
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Re: Help a lady racer out!

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Originally Posted by Brittany View Post
Thanks jamie. There is enough pressure that the oil is spraying out if the overflow hose. The sprays goes to the ground but it was bad enough that it sprayed down the side of my car to the back wheel so we think it may have enough pressure to put it back in the engine. We are going to try adding a port on the right side of the head and run a hose from the intake side back into the head on the timing side. If this don't work we thought maybe we can plug the intake side and just put a mini filter over the new port on the driver side to allow the engine to breath. Any thoughts on this,
Spraying out on the right side of the car, though, right? But there's nothing to lose -- if there's not enough pressure to pump it back over to the other side, you can either plug the "downhill" side or try the pump route. And when you say, "add a port to the head", you really mean the valve cover, right? (I don't think I'd drill into the head itself.)

What are other drivers doing? I'm willing to bet Preludes aren't the only car out there with this problem. I'll bet there's a fix known among the circle track community.
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Old 05-18-2016, 11:43 AM
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Re: Help a lady racer out!

Yes I meant valve cover haha. We are going to try and plug the passenger side Breather and add a new one to the drivers side of the valve cover and hope it works. If not we will vout a tube between the 2 ports and put a filter in there. I'm the only one with this problem thst I've discovered. I Don't Know how....
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Old 05-18-2016, 10:28 PM
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Re: Help a lady racer out!

Keep us all posted -- it's an interesting problem.
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Old 06-16-2016, 03:32 PM
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Re: Help a lady racer out!

It worked! I attached some photos to show what we did. Sorry jt took so long but we kept getting rained out so I didn't get to test it until last weekend. No oil loss what so ever. Or smoking.
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File Type: jpg 20160616_121617.jpg (157 Bytes, 28 views)
File Type: jpg 20160616_121622.jpg (157 Bytes, 28 views)
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Old 06-16-2016, 03:34 PM
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Re: Help a lady racer out!

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File Type: jpg 20160616_121622.jpg (157 Bytes, 27 views)
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Old 06-21-2016, 03:45 AM
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Re: Help a lady racer out!

It is me or the pics are not loading? 2nd thread with attachment not showing here in my end.
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Old 08-27-2016, 12:03 AM
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Re: Help a lady racer out!

Quote:
Originally Posted by Brittany View Post
It worked! I attached some photos to show what we did. Sorry jt took so long but we kept getting rained out so I didn't get to test it until last weekend. No oil loss what so ever. Or smoking.
So now that you're not oiling the track, how's the season going?
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