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Oil Pressure drop right hander question

 
Old Apr 17, 2019, 11:26 AM
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Oil Pressure drop right hander question

So I know there are some topic out there about oil pressure drop on right handers. I noticed during autocross my pressure drops to around 40psi on right handers while using re-71's. So I guess my main question is, is this a problem/should I be concerned about it? 2nd, are there known things that can help with it that isn't a dry sump (like to baffled pans actually work/help and if so which one)?
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Old Apr 17, 2019, 11:42 AM
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There are a ton of threads on this, it's been well researched. Out of curiosity, how long are these right handers?
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Old Apr 17, 2019, 12:03 PM
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The baffled pans do help. They add about 1-1.5 seconds befor eyou see the pressure drop off. Racefab makes a pan, they're in New Zealand. and Chad McCurdy (find him on Facebook) makes a nice pan as well.
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Old Apr 17, 2019, 12:06 PM
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Originally Posted by kaj View Post
There are a ton of threads on this, it's been well researched. Out of curiosity, how long are these right handers?
Yea there are a bunch of threads but the information is not very concise.

Any who, the right handers are pretty short. At most it would be 2-3 seconds depending on the course. On a turn around, it can take about a good 4 seconds. Even on slaloms I see the pressure going from 90/100 (ball park guess) down to 40's just from the quick left and right slalom transitions.

In this video, look at the middle gauge and you can see the needle going up and down, especially on the slalom parts. 15 second mark on the right hand sweeper going across the runway also you can see it just drop and stay dropped for a good second before it picks back up.
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Old Apr 17, 2019, 12:06 PM
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Originally Posted by letsgetthisdone View Post
The baffled pans do help. They add about 1-1.5 seconds befor eyou see the pressure drop off. Racefab makes a pan, they're in New Zealand. and Chad McCurdy (find him on Facebook) makes a nice pan as well.
Awesome, thanks for the info!
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Old Apr 17, 2019, 12:11 PM
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It's been a while since I ran an unbaffled pan, but that seem kinda quick to have pressure drop that low. I could be wrong, since it's been a few years... but I'm not sure that's normal....? If it is, then no wonder people are killing motors. eek. That's kinda scary.

**edit: with the baffled pan I was able to sustain 0.8-1.1G for about 9 seconds with a drop to about 90psi. Not sure if that's helpful.

Last edited by kaj; Apr 17, 2019 at 12:18 PM.
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Old Apr 17, 2019, 01:14 PM
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.8-1.1g is barely higher than stock.

We're talking in the 1.2+ range. This was a trace chad sent me. You can see it take longer to fall off, then it still has recovery spikes. Overall the engine spend A LOT less time at critically low pressures. White is his, yellow is stock pan.Attachment 322447
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Old Apr 17, 2019, 01:15 PM
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Pic fail
Attached Thumbnails Oil Pressure drop right hander question-photo880.jpg  
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Old Apr 17, 2019, 02:23 PM
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I guess it wasn't helpful, then. I didn't feel the Bstones would have allowed me to go any faster.

Last edited by kaj; Apr 17, 2019 at 02:39 PM.
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Old Apr 17, 2019, 02:52 PM
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Originally Posted by kaj
I guess it wasn't helpful, then. I didn't feel the Bstones would have allowed me to go any faster.
A stock Evo does .92g on the skid pad.
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Old Apr 17, 2019, 03:14 PM
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Originally Posted by letsgetthisdone View Post
A stock Evo does .92g on the skid pad.
on a skid pad, yes. Real corners will make you generate more Gs.
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Old Apr 17, 2019, 03:23 PM
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Originally Posted by BigT View Post
on a skid pad, yes. Real corners will make you generate more Gs.
It would seem not in my case at least not enough to affect the oil.

Last edited by kaj; Apr 17, 2019 at 03:51 PM.
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Old Apr 17, 2019, 05:31 PM
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Originally Posted by BigT View Post
on a skid pad, yes. Real corners will make you generate more Gs.
It was just a point of reference.
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Old Apr 17, 2019, 06:11 PM
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But how do I make 1.4-1.5g stay happy?!

I know TPA is hitting something over 2g at speed on the banked corner at GTAC last year. But pretty sure they solved that with a dry sump
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Old Apr 18, 2019, 09:15 AM
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^I thought they were still using a wet sump, no? That being said they have popped a few motors soooooo...
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