well i went to rockingham today, was having a great time until we drove into the pit lane and heard seriously loud banging noises from under the bonnet . had to get towed back to hull. looks like after spending 6.5k on my top end, the bottom end has now given up, at least it seems that way. christ knows how much it will cost this time, i could have bought a new car with the money i am spending on this 10 year old car. pissed off to say the least.

steve

Personaly Steve i would keep the zed,get the engine well sorted,reason being what the hell can one get out there for the money!sod all exciting/different/big fun factor/driving with a big grin(or not if somethin happens), i mean all the cars out there are now looking all the same,there boring, stayed,uninteresting,like a load of lemings with no indeviduallity,so,in a word,if you love it,keep it,enjoy.

As well as the oil pump -

 

I can't recall if the sump is baffled on the Z, I don't think it is - see if you can get one made up by someone reputable (I'm sure they'd sell more than just yours, too), or if you really want long track sessions, as Ay3888 says, a dry sump kit.

 

The Z also has a tendency to suck raw oil through the PCV's under heavy cornering (as well as suffering oil starvation if the cornering forces are very high), so it's worth keeping a very close eye on your oil when on track, or thinking about trying to rig up an oil seperator system inline in the PCV's (it's been debated before, it's just not easy).

 

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GZ.

Originally posted by Ay3388:

Oil starvation is not necessarily blocked oilways - could be a lack of oil at the pickup point at the pump. If you have been on track then the oil gets moved around in the sump a lot more than you could ever get it to do on the road, and as the pump tries to get oil, its 'at the other side' of the sump therefore, oil starvation occurs. Its a possibility. How many sessions had you done previously (if its like a 'proper' track - i.e. not 1/4 mile jobbie) and had you checked/topped up oil )if needed between sessions, cos you can use a fair amount of oil when you are on track.

Im not sure what the baffle situation is in the sump of the zx i.e. is it a good setup? are there any baffle plates at all? some kind of windage/trapdoor affair at all? if not, someone must do a kit maybe someone could point out some kits or see about getting one made up. Alternatively, see if your mechanic knows of any dry sump kits this should cure any starvation problems.

But could be more owing to if you hadnt checked oil between sessions.

hope that helps

 

Await Mr Hairsy to rip me to pieces

 

What a load of old cr@p

 

Didn't want to disappoint !

 

Actually, I used to think that the volume of oil in the Z was low for such a highly stressed engine. Apart from anything else, the more oil there is, the less cr@ppy particles per litre there are in the oil at any one time. My TVR used to take twice as much oil as a Z which was more expensive but more confience inspiring.

 

No idea on what sort of baffling there is but Nico or Duff may well know.

 

I've never heard of this problem occuring through oil starvation at the pump but that doesn't mean it doesn't happen. I think a fair few Zs were raced a lot in the states and Japan. Does anyone know if they were dry sumped ?

 

Dave

Hang in there mate, I am just about to fit my 5th engine since July. Fun!!!!All bottom end problems!!!

The sump has plenty of baffles in it - which makes it an **** to clean actually. However, the sump is a little too small in variuos peoples opinions, make sure you're filled up to the maximum marker on the dip stick before hitting the track.

 

There are also plenty of other baffles and oil traps in the cam covers to stop too much oil being reburnt through the crank ventilation system, but is still a little insufficient for serious track use - when a catch tank would be advised.

 

2p

 

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Simon

neone know how much oil fills a 300 from dry ?

Originally posted by b12andy:

Hang in there mate, I am just about to fit my 5th engine since July. Fun!!!!All bottom end problems!!!

 

gee man, now thats what i call hanging in there!!! 5 engines, you put jaylox to shame!!

 

still thinking about what to do, but presently sorting out buying a house, so cash will be short for a while.

 

also seems that bottom end rebiuld is the best solution, but i dont know about how much confidence i will have in the car now.

 

steve

Originally posted by greyzed:

The Z also has a tendency to suck raw oil through the PCV's under heavy cornering (as well as suffering oil starvation if the cornering forces are very high), so it's worth keeping a very close eye on your oil when on track, or thinking about trying to rig up an oil seperator system inline in the PCV's (it's been debated before, it's just not easy).

 

 

I think this tech article from Maciej's page deals with this:

http://home.swipnet.se/e-solutions/StillenPCV.html

 

Trev

 

I knew there was a document on it somewhere - thanks Trey

 

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GZ.