accusump

[deanr777]

I would like some help please,
I am considering fitting an accusump to my chim 500, primerily to protect it on the odd track day and also when i lay it up for long periods of time in my garage.
I am struggling to find out what size i need and also wher exactly to locate it. Having looked in the engine bay the only gap i can see to mount it is on the two horizontal cross members that travel left to right on the left hand side as you look at the car, near the exhuast, My concern is heat, the exhaust pipe curls over the top and seems very close to this location.
Any advice would be welcome
Thanks

[shpub]

Get a John Eales Developments baffled sump. It is extremely good at coping with potential oil surges etc and has the advantage of simply replacing the old one.

I discussed the accusump with John for the 520SE but he said that it wasn't needed as I had the baffled sump instead.

I'm not sure how it will protect the car during storage.

Edited by shpub on Wednesday 7th June 09:14

[Boosted LS1]

The main purpose for an accusump is to provide emergency oil pressure if needed and probably pressure prior to cranking. I think it's a great 'fail safe' should there be space for it. The trap door sumps are a good practical solution as said by shpub but even they don't always stop the oil light coming on under lateral G's.

Boosted.

[deanr777]

The accusump will kick in as soon as the pressure drops, so while the car is in storarage or not started for some time the oil will drain into the sump. The accusump will feed the bearings instantly the key is turned thus protect the engine on that initial start up , I think its called "scuff" on the crank that is caused if the engine is not protected

[shpub]

The 520SE sprints on slicks and sees more G than most. The telemetry on the car indicates no oil surge. The engine has been stripped several times during its mod career and no issues there either. So from that point of view I can't see the need on a road car when a good baffled sump is fitted.

The car is not a regular user either but I do use Kendal GT20/50 in it which is an incredibly sticky oil which is very good at coating surfaces.

[Boosted LS1]

On the other hand a friends track tr8 on hoosiers used to have the oil light flashing on momentarily during sharp manouvers (on the street) and it had a group A sump. Think he liked the thick stuff to. I liked to use amsoil and kendall.

Boosted.

[havoc]

I would be VERY careful with an accusump.

A good friend built a 205 track-day car, and used an accusump initially...except it wasn't especially effective on the longer corners...apparently they're designed for competition use where the engine can be stripped down after each race, not for a road/track car.

He went down the dry-sump route before he buggered his engine. Unfortunately, the guys at PPC magazine didn't with their 205, and their bottom-end went big-style...their Accusump wasn't much protection at all.


If it's an occasional track-day machine mainly for road-use, a good baffled sump should be plenty enough, unless you plan to run slicks and adjustable suspension. If it's a proper track-toy, dry-sump it!