Anyone ?

I setup an OMEX 710 so i know a bit. Knock sensors are hit and miss you don't know they work untill you start mapping. I have a basic calabration file if you need PM me. Its for a 20VT but the sensor corrections should be of good use.

Sure but are the map sensor on the 20 vt the same as the 16v ?. Mine have 3 wire.

Didnt use it kenneth, also didnt use the map sensor, but I would calibrate that if I want a data log of the numbers otherwise the absolute value doesnt matter as long as the response makes sense.

I used a 3Bar (3pin) Cosworth map sensor as it’s considered standard.

I just realised that the map file doesn’t belong to me so it is not mine to give out however I have done some screen shoots of the information you need to get you started. I hope this helps.

super thanks, what about the knock sensor did you use that..

Not yet it’s very tricky to setup. 20VT has two knock sensors which are wired up in parallel as the OMEX only has one input for knock control. The knock circuit is gonna be tricky to get right but we will give it a go later

BIG thanks to Rich, to help sorting the problems i have with the Omex..

Ok, been a while since i have been using my car(new jon, and some fuel problem with the car).

Did some hard start today.. and wow it is crazy with 4x4 (special when i normaly only used to 2wd), put it first gear 4500, on launch, and release clutch.. ==

go easy on 'hard starts', it is no longer a fwd to burn out the tires. Clutch suffers more with a 4x4 set up.

BTW, could you please post any picture from your inlet manifold with the inlet from 20VT? I believe it is very interesting and I'd like to see if it will possible to go for this mod on my Alfa 155 Q4. Did you notice any improvement at low - middle rpm?

Nick

Thx, but did have to try :-). my clutch should be good for 850 nm so i think the gearbox and so on drop first.

I can take some pic of the inlet manifold, and i did use the trottle from the alfa v6 (88 mm if i remember, but can check when i get home).

Improvemnt hmmm, i am unsure if i would recomed to anyone (gues my big trottle), but it is pretty much on/off, so it "feels" like it have giving some in the high end, or maybe it just feel like that because it lag in the low :-/

I think i going to put the kappa on again.

/Kenneth

Great to hear it is running now kenneth and driveable

Are you able to rev it out yet or are you still mapping the omex, those big injectors and such.

I assume by the launch comments it has been in the RR - anything to tell us?

Did you have the Kappa manifold previously?
They say it is an improvement but only for the high rpm!

I saw your clutch at the first posts and I insist. Go easy with the 'hard starts' especially if you use the Q4 4x4 mechanical parts. All the stress goes to the clutch and Alfa claimed at that time that it was impossible to burn out the tires - make the wheels spin!

Waiting for the pics.

some pic here.. dont look at the black hhmm painting or what should i say :-)
pic1
pic2
pic3

Thanks for the pictures Kenneth, very kind.

But I meant some picture with this manifold mounted on the engine. You see I'd like to see if there will be any interference from the throttle body with the ICV valve or the other parts there {battery, ABS ...}.

This is a picture from the engine bay in a Q4.

YEAHHHHH, (sorry caps) after 3,5 month i have know found the error on my car.....
My car did run fine for 3-4 min then it did run on 3 cylinder, then four again and so on.

So i did change the ECU to Omex 600 ( later to 710) new loom, new coils, plug,cable, cleaning my new injectors, change the fuel suply and nothing did Help.....
Try to test the compresion and it was fine..
i could later locate that it was cylinder 4..
Sometimes i could drive 20 minute with no error and sometimes 1..
Then i Again got my injectors to service (Delphi 800cc), and did ask him to test them, longer time.. and then he could recreate the error after 13 min in the test flow, the injector 4 sudenly close to 8% flow, and then sudenly back again, it must be something with the valve inside the injector.,,
So new injector er fitted today, so now just a remap, and here we go.

nice to hear mate as for my dead ecu it was a duff chip i had,

cant wait to see this on a RR

Hmmm, that's bad news. How were you setting the ignition timing and listening for detonation?

Sorry to hear about this Kenneth, so it was just down to the tune and you are going to rebuild to the same specs?

there was an old post about wossner pistons and they egdes and the possiblity of detonation on the fine edges, I will try and dig it out.

here it is, do you think this is where your detonation started?

http://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=538741

Hi Saint
You right thay have Detonation on the fine edge.., but again i think every brand piston like CP and so on would have done this in the end.. maybe they could take a few km more, but the car's must have done some (Wrong) Detonation, that no piston would handle.

Here you can see the Original piston VS Woesner.
Now i do not have the tool to compare them , but in fact it looks like the woesner piston should have alower CR than the original.
But as you can see that it have damage in the sharp thin corner.

Those pistons are such a strange design. In fact I would argue that Wossner have got it completely wrong there.

I believe Vas who also runs Wossner has had piston issues, maybe he will comment

So i was right about the wosner ones being lower compression then? Kenneth have you ever actually measured the compression on each cylinder? I got low readings on all 4 around 110 on each one! The dish seems to be huge on the pistons! Are you also running c&b cams? Nick..

Hi Nick, yes i am running C%B cams, i was reading 100 on them but... it was when piston look like the pic

Well had my head gasket done about a month ago... Would any piston damage been noticeable then, what i mean is would the pistons been exposed when the gasket was being done? Nick...

Yeah, sure would have and they should have seen any damage

If you look at Guy Craft
Then it Seem (i have not see one IRL), like thay have the same Thin corner around the valve.

I have seen similer designs on pistons before with no major issues but I have heard on the grape vine that failures like this are quite common when it comes to wossner pistons and aparantly it's down to the material and not the design

as I have not witnessed this my self nor have I seen any metalurgy results for a failed wossner piston I would take it with a pinch of salt

but I would find out what grade forged alloy these are made of, if it's the same as what the proven piston manufacturers are using then that can put to bed

it would be dificult to pin the fault solely on the design as wossner will argue that it's not designed to tolerate det and that's the cause of the failure

I would personally get them sent to a metslurgist and you mat have z leg to stand on when you argue with wossner

Ricky