Accusump Installed this weekend...

[Byron in Atlanta]

Originally Posted by jaykay

Nice installation.....I like the cylinder off of the floor!

The Mantis sump is really deep. Would it do the same job as the accusump apart from nice oil pressure on start-up?

Would I be okay with just a sump on a skid pad and DE stuff. I don't think I will have slicks on my current street car

I suppose if you are not doing any long sweeping right handers, then you can get by with just the deep sump. I was looking for some peace of mind that I am not going to sling another rod! You can never say never, but like I said, it won't be for lack of oil if I can help it.

[Mike_Yi]

Originally Posted by Byron in Atlanta

I suppose if you are not doing any long sweeping right handers, then you can get by with just the deep sump. I was looking for some peace of mind that I am not going to sling another rod! You can never say never, but like I said, it won't be for lack of oil if I can help it.

DO NOT drive Road America then.

[ChrisZang]

Originally Posted by Byron in Atlanta

I suppose if you are not doing any long sweeping right handers, then you can get by with just the deep sump.

Hmmmm, wouldn't that apply to left handers as well (example turn 2 in Thunderhill)
The oil pickup tube is dead center in the middle.

[Byron in Atlanta]

Originally Posted by ChrisZang

Hmmmm, wouldn't that apply to left handers as well (example turn 2 in Thunderhill)
The oil pickup tube is dead center in the middle.

No because the Boxster engine has a scavenger pump in the left rear.

[ChrisZang]

Bonus question, and no pun intended here, as I am just considering this as my next mod to get ready for the track season.
So if anyone pulls such high G that he's running into oil starvation problems shouldn't the next mod be the Motorsport AOS, see this thread:
http://www.renntech.org/forums/index.php/topic/21641-will-a-motorsports-aos-work-on-a-boxster.

My decision is to wait until it happens again, so far I had it happen only once after existing turn 2 in Thunderhill: http://www.youtube.com/watch?v=BkWsIT6C664
I was on Sport Cups then, this season will be on less sticky Dunlop Star-Spec so I hope I will be OK.

By the way: my other outstanding track mod will be the underdrive pulley, as I fried my PS pump last season

[insite]

chris -

a better route is to use a catch tank similar to this:
http://www.summitracing.com/parts/CTR-80-206/

route the outlet from the oil separator to the tank & block off the inlet at the throttle. much cheaper & a failsafe solution.

shoot me a message when you get ready to do your accusump (save $$$)

Originally Posted by ChrisZang

Bonus question, and no pun intended here, as I am just considering this as my next mod to get ready for the track season.
So if anyone pulls such high G that he's running into oil starvation problems shouldn't the next mod be the Motorsport AOS, see this thread:
http://www.renntech.org/forums/index.php/topic/21641-will-a-motorsports-aos-work-on-a-boxster.

[jaykay]

Ouch, are we saying that long sweeping rights will develop high enough g loading on ps2s (as in without slicks)? What sustained g loading threshold are we talking about? I might just put my i-phone up on my dash and set an alarm

[insite]

Originally Posted by jaykay

Ouch, are we saying that long sweeping rights will develop high enough g loading on ps2s (as in without slicks)? What sustained g loading threshold are we talking about? I might just put my i-phone up on my dash and set an alarm

exactly right. something slightly less than 1G can cavitate the sump over several sustained seconds. the oil pools in the head AWAY from the scavenge pump & causes a starvation issue at the pickup tube. this is MOST common with left handers in a boxster (right handers in a 996), but depending upon forward accel / decel, this can hapen in either direction. slicks exacerbate the problem, but it DOES exhist even on street tires.

porsche rectifies this for racing customers with its 'motorsport' upgrade, which is basically the same as the X51 oiling mod. they replace the scavenge pumps with versions that have exterior as well as interior inlets. a tube is run from the OUTSIDE of the scavenge pumps, across the valve covers, and to the other side of the motor. this way, the scavenge pumps can draw oil from either side of the motor. they also add the deeper sump w/ a bit higher oil capacity for good measure. some people modify the baffles as well.

at any rate, all of the above is pretty pricey and still leaves the door to other oiling related failures WIDE open. the accusump pretty much eliminates those problems.

i think the accusump coupled with the 3rd radiator kit & the 'S' oil cooler will get you about as close to dead reliable as this motor can be without cracking it open.

[Mike_Yi]

Originally Posted by jaykay

Ouch, are we saying that long sweeping rights will develop high enough g loading on ps2s (as in without slicks)? What sustained g loading threshold are we talking about? I might just put my i-phone up on my dash and set an alarm

It happened to my engine at Road America on Goodyear Eagle F1 Asymmetrics (which are rated slightly better than PS2s, but probably not enough to make a difference). I had done several track days on other tracks before with no problem. However, RA has so many really high speed corners that it imposes much more G than tighter tracks with slower speed corners. Add to that the Carousel....