I didn't realize 2.5's could be revved that high.

 

Standard ones can't.

 

and I am pretty sure now why the difference showed up with the plate and without it.....

The rear stay of the pickup bolts on top of the std windage tray holding the pickup at a set angle.

When you fit the cosworth tray, it needs to have the std windage tray removed so the rear stay of the pickup is 0.5mm further up. This may cause stress on the front of the pickup and may have been responsible for a small hairline fracture opening up at the front of the pick up pipe. When removed, and the std windage tray put back in, this fracture would close up and the oil pressure would be back to normal.

Therefore....

When I fit tomorrow I will be shimming the rear stay by the width of the std windage tray to avoid this stress and to keep the pickup at excatly the angle intended by Subaru.

This might be a worthwhile thing to do for future installs Alan

 

Good point, and well thought through, although I'm inclined to suggest that the crack might have been there all along!
Having said that, I'll contact Cosworth tomorrow, and suggest they add a shim spacer to the kit. As a support, I would have thought a washer would do it!
Two good things to come out of all this. Everybody has thought a whole lot more about breather systems, and we'll all be checking our pick up pipes for cracks!

 

Good idea - I am sure they will see what I mean

 

See above..

 

Whether it was there or not or just barely there (not like the pic where i have opened it up to make it show up in the photo), the change of angle by a very small degree cant be good for even a std (and non faulty) pickup.

I am inclined to think that this change of angle either started the hairline crack or perpetuated it.

Note that the base of the pick up itself is sunk into the block so cannot change angle so would be stressing the join.

Now, i think it is probably a design fault with the top part of the 06 pickup, which is a shame as the rest of the sump and pick up looks a vast improvement over previous years.

Anyway - I will be able to confirm whether this is really the culprit tomorrow I sincerely hope it is as I dont want to take the sump off and on again

 

I'm fairly well convinced you've found your problem, that's for sure.
Hopefully track success beckons!

 

Fitted and Oil Pressure is SPOT ON

I did fit the shim to the rear stay though - I am convinced that this started the crack. I would def fit one for any future kits you fit.

I will report back on the actual objective for this at controlling sloshing and surge after Sunday excitement

 

Good news Duncan.

 

Thanks for updating the thread Duncan and good luck with Time Attack this weekend.

Shaun your GroupN style sump has both a new tray with flaps and central tube to direct the oil around the pickup.

 

See my post above !

Dave has just had a new engine from Subaru because of the same fault !

Other Duncan

 

It was reasuring to note (not) that it was not a surprise to the Subaru dealer when i went it to pick up the pipe. Subaru for some reason have a large stock of these parts !! They also suffer catastrophic failure of these pipes on the Outback.

I am feeling very lucky at the moment.

Hopefully it will live up to its billing on keeping the oil where it should be and out of the breathers at Donington.

Just snow, ice and rain to deal with now on 888's

 

Can i thank you all for putting all this excellent information in this thread. Ive just read every word.

As a DIYer such information is invaluable. I will be posting a few topics on this for further information in the near future.

I have been tracking my car this year, and have just gone to slicks and im im worried for my engine. And so this thread popped up in a google search for baffled sump.

Dynamix. I understand you have recently gone to Zen dry sump. How did u get on with this cossie baffle. Did it do the job?

Thanks again.
Chris

 

Chris - if you are running slicks, I wouldn't rely on this cosworth plate to do enough to protect your engine. (not unless you are driving slowly )

Fully baffled sump works great but once you get up to speed, the dry sump is the only full solution - you can still get oil surge with baffled sumps (even very good ones)

 

I wouldn't rely on just that if you are running with slicks. Cosworth also supply a dry sump kit, £1900 plus vat from us.

 

tell me more about the dry sump Alan pm if prefer

 

Apparently I'm a bit premature, one month to be exact, according to the very nice man I just spoke to from California. It's nearing completion of long term testing. As soon as I have full details, I'll slap it all over..

 

oooo, very tempting alan, it would be too easy to add this just now, will hold fire just now though, adding the simtek to the build will keep me happy for now

 

you know you want the dry sump setup...pmsl

 

Whats the price difference zens -cosworth ??

 

think the zen 1 is about £400 plus vat, there are 2 options iirc, details on zens website....cosworth 1 will be the muts nuts.....

 

i know i do, but i have to resist temptation, alan's already bled me dry

simtek put on the car yesterday now 2

 

So zens is £400 and cosworth is £1900 cant be right ...

 

Nope, It's not

Taken from 22B

Main kit £2k+vat
Zen Custom tank (for our prefered location) £320+vat
Extra lines £250+vat

 

Thought so dunk nice one ...

 

£400 is the rough cost of a baffled sump.

 

Alan - what does that kit include ?

Seems a lot cheaper than the indications I had a while back.

 

I have a current price list that includes it. Apart from that, I'm waiting for the chaps to tell me all about it. I'll pop it on as soon as..

 

Thanks Alan.