David MY99

I've modified the heads (99/00) with Ferrera valve's, springs and underbuckets (no lose shims).
i am running a 12 mm pump on my 2.0 Closed Deck with oilsquirters and an Spec C oilcooler.
Using Motul 300V 15W50

Would this be enough to make safe 8500-8700rpm.
oiltemp. won't come above 110Deg. C

I could imagine that at higher rev's we just have not enough oil in our engine.
The 12mm oilpump makes 60 liter/min and would suck the carter empty 14-15 times a minute?

TonyBurns

iTrader: (3)

Its the pistons that are your problem, can they take the RPM? heavier pistons will take longer to move etc, normal cast ones wont be up to the job, you need either hyper rheuetic (sp) pistons or forged.

Tony

Tone Loc

iTrader: (1)

Not sure i totally agree with that Tony. The heavier pistons will make a difference yes but its the extra load over forged items that they put on the rods at higher rpm i'd be worried about not the actual pistons themselves being 'up to the job.'

Tony.

David MY99

i'm running forged wiseco pistons and eaglerods with STI bearings.
I believe the pistons are 100 gram lighter and are up to the job i think

ZEN Performance

what cams are you running? Your current spec seems to be okay for an rpm limit of 8500rpm, but you will probably find there is no point in running the engine that high due to the cams if they are standard UK spec.

Paul

David MY99

Paul,

i'm running stock cams at the moment. See also:
http://bbs.scoobynet.co.uk/showthread.php?t=454821

Any info is very welcome

Tim-H

I could imagine that at higher rev's we just have not enough oil in our engine.
The 12mm oilpump makes 60 liter/min and would suck the carter empty 14-15 times a minute?[/QUOTE]


add a corner / bit of braking , and you will lose you oil presure, the oil will just not fall to the bottom of the sump quick enough, the pump then cavitates, n.o 3 then falls out the side,
I saw on an oz site about someone doing a dry sump kit for them, that would sort it, I use an ARC alloy sump, I also modified the pickup height from 15 mm to 5mm, and a RCMS pump ,It hold`s approx 6.5 l, the alloy also give`s a little oil cooling,
why would you want to use 8500- 8750 ?

Have a good one
Tim

David MY99

Thanks Tim,

i will look for the dry sump kit also or an uprated oilcase to solve the pickup height if that's available or adjust the pickup line.
We want to the high rev's because we use the car also for dragracing and have a prety laggy turbo and an JDM 6speed. With 8700 rpm we can run 118mph in 4th and if we use other cams in the near future we have an very good powerband from 4500-until 8000 rpm.
At the moment we're doing ¼mile @ 12.2 but want to get into the high 11's.
There is no use in going to 8500rpm except for changing gear. that's why i'm also looking for some good cams for daily use and 8000 rpm if that's available

Tim-H

[QUOTE=David MY99]Thanks Tim,

I would think just higher capacity would do for "a straight line" there are lot`s of different one`s, Mine is arc, there are people welding "wings"to the side, including the work`s WRC cars but you should see the work in a works one, (£3000.00 from prodrive :-) I cut and brazed a piece into the pipe, made up a 10 mm spacer on a lathe, for the bolt, to find out what your clearence is fit pickup pipe , you need some plastacine (sp) / blu tac some sort on non sticky putty, place some round the outside of the pick up, fit sump, remove sump and measure putty, cut pipe, tack piece in, refit,check gap, when you get it right, (it`s not as easy as it looks, to get it parelel to the sump, ) I brazed mine , (good seal, less chance of a stay blob of weld,) then clean it, WELL,
Have a good one
Tim