Oil PSI Loss In Hard R Turns In 308's

I'll look forward to your results. I suppose you'll be using their largest model, the 3 qt. size with the electric solenoid valve? Where do you plan to plumb it into the system (do keep in mind that a check-valve needs to be inserted into the line, to keep the oil from flowing back into the supply circuit to the pump and that the accumulator [which by-the-way is made by the originator, Accusump of Canton Mecca] needs to be AFTER the filter, so it receives clean oil).

I've heard that the 328 pan and pick-up is one of the easiest and most affordable mods that can be done to improve this situation too.

 

Friend of mine lost his 308 engine due to this same problem.

 

As long as there's clearance, they are normally are installed with an adapter plate under the oil filter... relatively simple. See the "how-to" at www.4wheeloffroad.com/howto/3282/

 

You want to talk to Rutlands or one of the other usual sources for a 328 oil pan, oil pick up tube (fun to change) and sump plug. They have them from time to time.

You can also add a deeper sump. Bill pound fab'd a 1 inch extension baffle and my guess is you can contact him and see if he has any more.

QV London have plumbed in Accusumps. You might ask them their experience in dealing with the problem.
Good luck. Look forward to hearing of your progress
Philip

 

I've been running an Accusump for several years with no problem ( knock on wood). It's mounted in the trunk, and feeds into a junction under the oil filter. Good luck at Barbers - keep us posted.

 

Help me understand how this works.

Hard RH turn. Oil pressure falls, trigger/valve pumps oil from Accusump into engine. Keeps pumping until condition ceases to exist or Accusump pumped dry. WS engine now has 10 qts versus 7 that Enzo intended.

What happens next?

Clearly, if the excess oil stays in the sump, the crankshaft will likely be whipping the oil into a froth, pushing oil out the breather etc. So, is there facility for the Accusump to suck the excess oil from the sump back into the container?

If so, how do we ensure it sucks oil, not air?

Last, how many times can it perform this trick until it needs priming or resetting in some way?
Philip

 

I am using the 3 quart unit (part# 24-006). Go to www.accusump.com for explanation on how it works.
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Cold air box / air filter

 

Tommy
Here's the Tech Bulletin on the modification (10-16)
Regards
JM
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Okay, as long as my engine is all apart, maybe I should be looking at some of this. I am not planning to track the car in the near future, and I wont be DSing it, but obviously knowing I could run through a long corner somewhere, I wouldnt mind some extra protection. I am looking at this Moroso oil accumulator and the question I have, is how long will three quarts feed the motor after the primary pump loses pressure flow? I think one would assume that pressure would fall off significantly before the total volume was lost, unless its a pressurised bladder over the top of it. If it works well it would sure be a good safety feature even on a street car, if for nothing else but cold starts. I would imagine one could even gang two or more together in series to extend the time factor?

 

Interestingly enough, I've been tracking my 308QV for over 10 years, and I've NEVER had the oil pressure light come on or noticed the needle going to zero in a turn. I'm on the same tracks as Tommy, but granted that Tommy is a better and more aggressive driver than me and he also usually runs with track tires. so he can pull more G's in the turns than I can with street tires.

Tommy: which turn(s) at Barber do you find your car has the problem? Is it just turn 1-2 hard loop? Or do you also have a problem at the end of the chicane? For onlookers who don't know the turn numbering or track layout, you can go to www.fca-se.org/barber_track.htm, go to the bottom of the page and click for the "Turn A Lap" presentations of both a Flash instruction turn by turn, and a separate in-car video.

 

Tommy,
What set of facts do you base this on?
Philip

 

Mike
I found the biggest impact when I went to R-compound tires. Also, by the time you see it on the gauge, the damage is already done. I noticed it at turn 14 and the Carousel at Road America.
Philip