Racers. Do you worry about oiling issues, or do you just drive?

[Bebbetufs]

Originally Posted by jsceash

I have a hand built by me Frankenstein motor there is very little left that has not seen some modification. I currently have 40k on the motor rebuild. I don't think about it too much at the track. I do watch my videos and data logs carefully when I get home. I have 2 oil pressure gauges and an oil temp gauge, that I can watch on track, but don't watch more than a glance or so a lap. I run Dot 40 CAA or BAA Slick tires. I will see G's in the 1.6, 1.8 range on really good laps. I have added measures as the G's have increased through the years. My oiling, cooling mods go like this

1. Dual chamber AOS (motorsport AOS)
2. LN ceramic IMS bearing.
3. LN 1/2 Qt Deep Sump. with X51 stainless baffle.
4. Third radiator
5. 4" underdrive pulley
6. Accusump. 2 Qt. with remote filter.
7. 997 oil cooler.
8. Air to Oil cooler fan cooled.
9. Electric power steering pump.
10. Manual engine Bay Fan switch.

Nice mods and longevity.
Did you alter bearing clearances?
Would you mind sharing some of your logs?

[itsnotanova]

Just to add my two cents.
80% of my business is to the racing crowd. I spend a lot of time talking to these guys and a lot of them are removing the accusump system because it isn't reliable (pressure switch)and is just dead weight. Of course you also have a bunch of people who swear by them. I'm leaning towards the useless side even though I have one in my car. I do like the ability to pre-lube though. That's when it's working at least. One thing they all agree on is the baffling in the oil pan. I think they all either use the X51, aftermarket or modify a factory pan.
Now when it comes to Cervelli's drysump system. It looks to be a wonderful system and has proven itself on the race track. Chris races in WRL and I don't believe he's blown a motor since installing his system. For those who don't know. Guys race for 8-24 hours in the WRL series. They beat the living tar out of these cars and 100 hours seems to be how long a motor last with them. Except Chris! Other race teams who compete with Chris are installing his system. It's not cheap but it might pay off in the long run. Here's the his website boxsterdrysump.wordpress.com or you can call him at 303-809-6173

[jsceash]

Originally Posted by itsnotanova

Just to add my two cents.
80% of my business is to the racing crowd. I spend a lot of time talking to these guys and a lot of them are removing the accusump system because it isn't reliable (pressure switch)and is just dead weight. Of course you also have a bunch of people who swear by them. I'm leaning towards the useless side even though I have one in my car. I do like the ability to pre-lube though. That's when it's working at least. One thing they all agree on is the baffling in the oil pan. I think they all either use the X51, aftermarket or modify a factory pan.
Now when it comes to Cervelli's drysump system. It looks to be a wonderful system and has proven itself on the race track. Chris races in WRL and I don't believe he's blown a motor since installing his system. For those who don't know. Guys race for 8-24 hours in the WRL series. They beat the living tar out of these cars and 100 hours seems to be how long a motor last with them. Except Chris! Other race teams who compete with Chris are installing his system. It's not cheap but it might pay off in the long run. Here's the his website boxsterdrysump.wordpress.com or you can call him at 303-809-6173

I don't know anything about the dry sump. The solenoid supplied with the accusump is crap, if you have one get rid of it. Find a online supplier of a 1/4 SS solenoid with a edpm diaphragm. Or else buy the manual operating kit.

[Topless]

My 2.5L Boxster logged 100+ track days, many at ACS Fontana which is known to kill dozens of 986 motors directly due to starvation. My brother and I ran nearly identical cars and both were regularly at the pointy end of the BSX time sheet. We never killed a motor.


There are lots of gizmos, gadgets, and methods to attempt to resolve this and I don't know any that are 100% effective. Here was our strategy with success over nearly 200 combined track days:

-Run NT-01 tires which are good track tires but generate less lateral G forces than the 40tw R-Comps.

- X-51 pan

- Castrol 5w40 oil changed every 6 months

- Make sure the oil level was exactly topped before every session at hi G tracks.

- Complete the banked sweeper at max speed and stay well away from the rev limit as we downshift for the next corner. The idea here is that after a banked sweeper, the pan is nearly dry from hi G cornering so we let the car idle under full braking to allow for some refill and only blip to 4k on downshift at the last possible moment. Pinging the rev limit with a nearly empty oil pan is the best way to cavitate the oil pickup and score the main bearings, killing a nice flat six motor.

I can't say these methods will work for everyone but they certainly were effective for us in BSX class.

[Bebbetufs]

Originally Posted by jsceash

I don't know anything about the dry sump. The solenoid supplied with the accusump is crap, if you have one get rid of it. Find a online supplier of a 1/4 SS solenoid with a edpm diaphragm. Or else buy the manual operating kit.

Unfortunately, a better solenoid won't help purge air that has already entered the pickup, which is what a pressure drop spike is. The air, or lack of oil, still has to pass by the bearings.

[jsceash]

Originally Posted by Bebbetufs

Nice mods and longevity.
Did you alter bearing clearances?
Would you mind sharing some of your logs?

My crank was balanced by a local service that builds 410 sprint engines. It was installed with stock Porsche bearings. My spinning weight is over 10 pounds less than stock.

I have shared videos with data on them but I don't know how to extract the data out of the video. I use a Garmin Virb XE with a Blu-tooth ODBII.