488 replies to this topic

[smiley]

MaxR's car smoked like the smokiest thing you've ever seen after his rebuild, when the PCV channel was opened up. It looked like some kind of James Bond smoke screen at Silverstone when he first had the car back up and running. Suffice to say, Silverstone didn't approve as they assumed it was a dangerous oil leak of some form.

 

The pcv valve inside the manifold needs to be in working order for this to succeed.

As this functionality has never been used so far due to it being blocked anyway, i'm not sure people check it for workability during a conversion using a second hand one.

(i got the tip from exmantaa. I don't know how to check working order of it myself) 

 

Knowing exmantaa, he will probably pop in soon to clarify.

 

Edited by smiley, 10 August 2013 - 10:24 AM.

[fezzasus]

It's just a one way valve. If you blow compressed air in both directions you'll get it opening one way and staying closed the other way if it's working.

[vocky]

from what I recall it is just a reducer / filter, not a valve of any description

 

Max's stage 3 engine originally had the inlet manifold breather connected and this caused it to tickover at 1500rpm, which courtenays could not map out, once the breather was blocked off normal tickover returned

[Exmantaa]

In the LSJ manifold it's a one way valve with a small orifice...

 

My understanding was always that Courtenays SC mapping could not cope with this and therefore most are blocked off and run with an open system. Dutch OBD runs perfect with a working PCV.

[fezzasus]

That's what I've heard too, I just don't understand why the PCV system will disrupt the engine map. It's after the MAP sensor and a completely mechanical device, so I don't see how it changes anything.

[smiley]

Maybe CS accidently fixed it when they rebuild the SC system to close the pcv, and drew the wrong conclusion. 

Only way to test is to have someone with a CS map put in the custom gasket and see what happens.

[CHILL Gone DUTCH]

Ok I've been looking at the pcv upgrade to my gasket
But found this

http://www.vx220.org...r-acceleration/

Don't no if we have moved on as its a old thread but are you not risking clogging the laminova up with oil by opening the gasket up ???

[fezzasus]

You shouldn't. The pipe that runs from the air filter to the top of the rocker cover is actually an inlet pipe, not outlet. The function is reversed when the PCV valve is blocked which is partly why it spits so much oil and noxious gasses. In normal PCV function air goes in the rocker cover opening and out of the inlet manifold after the laminovas.

 

If you are concerned about oil ingress, place a catch tank between the rocker cover and inlet. I didn't as I don't believe normal operation will produce much oil.

[CHILL Gone DUTCH]

At the moment the rocker cover pipe is positioned at the rear of the car because of the gasses it was giving off 1. If I introduce the pcv opening won't the pcv blow back into the manifold along with oil ?? 2. Will this reduce oil consumption ?? 3. Will the toxic gases then mix with the air and pass the map sensor 4. Won't this have a bad affect on power ?? Or have a positive affect

[CHILL Gone DUTCH]

I'm struggling to see the advantages as I now have the gasses coming out at the rear of car From rocker cover

Edited by CHILL Gone DUTCH, 12 August 2013 - 02:51 PM.

[fezzasus]

This won't do anything to the power, all it will do is conserve oil and ensure much higher oil quality while reducing any toxic gas emissions. There are no issues with doing this - it is already used in the original 2.0 LSJ engine that the supercharger and manifold are taken from.

[techieboy]

it is already used in the original 2.0 LSJ engine that the supercharger and manifold are taken from.

Though they still have breathing problems with it.

[CHILL Gone DUTCH]

So the advantage is oil condition and emissions And recycling of the toxic gasses. Why would I want to put the toxic gasses back into the inlet are they flammable will it reduce the amount of air going into chamber Still not 100% about this sorry for questions

[Bargi]

So the advantage is oil condition and emissions And recycling of the toxic gasses. Why would I want to put the toxic gasses back into the inlet are they flammable will it reduce the amount of air going into chamber Still not 100% about this sorry for questions

 

The other side of it is reducing positive pressure in the crankcase

Potentially will stop your oil from going sooty so quickly

[fezzasus]

Operation 'when is my MOT due again?' in full force today.

 

Secondary hand brake cable was sticking on one side. After 12 years and 84k miles it looked decidedly past it. New cable, good time to fit new rear calipers to compliment the braided lines already fitted. The rear looks pretty good now.

 

[Kieran McC]

Get the Wishbones painted LOL

[fezzasus]

Full refresh is next step. Just waiting for Seriously Lotus to get their bushes back in stock.

[fezzasus]

Weight loss

 

since putting around 30 kg into the boot and under the radiator in the form of a supercharger conversion, I decided the cheapest way of getting more power (and better braking, and handling) was to lose some weight. As I only weigh 70 kg, the car was the easiest target.

 

So far

 

head rests - 2kg 

EGR valve - 500 g

bonnet cutouts (above master cylinder - it rubs and is cut out on later cars, and extrusions around bonnet stops) - 200 g.

Team dynamics compared to NA alloys - 8 kg

 

Current total 10.7 kg

 

Have a plastic rocker cover waiting to go on but needs a deep clean at work first. Ambitious target is to remove the 30 kg added by the supercharger

Edited by fezzasus, 12 September 2013 - 07:10 PM.

[Wreelybro]

Ah the weight saving game!!

 

Hollow end wheel nuts!!

[fezzasus]

What's the weight saving of fitting these?