I was at a trackday in Sweden this weekend and on the way home the car startet to bluesmoke real bad and the car missed a cylinder.
I think i burned nr.2. becourse there is no compressen at all.
i was driving realy fast at the time and when i did liftoff there was alot of bluesmoke.
Hmm time to do a fuelrail mod to stop cylinder nr2. from running lean.

Skassa

 

Hmm, another "knackered engine on liftoff" thread?

Sorry to hear about your troubles. Hope the cure isn't too painful!

 

I will take of the head tonight as i will buy myself the special tool needed to remowe the headstuds.
Then i can see if it`s just the rings or if it`s the piston thats gone.I just talked the the dealer and He has just had the same problem on a rallycar.On that car it was just the rings(I hope that it`s just that)

Skassa

 

Bad news Skassa, rest in Danish.
Håber det kun er ringene og ikke hul i stemplet, da jeg kørte bag dig var der ingen røg fra din bil og den sagde også sundt nok. Hvis der er hul i stemplet må det være fra mager blanding.
Jeg kørte med 1,15 bar på Knutstorp og min AFR måler falder i visning, nu har jeg sat trykket ned til 1.05 og får ved fuld power igen fed blanding, det ser ud til at jeg med 1,15 bar er over grænsen for hvad ECU'en kan levere af benzin, den går også meget blødere med 1 bar, men mister lidt power. Jeg sender foto en af dagene Hilsen Lars

And By the way Subaru club Denmark again this year took the third position in the Club championship, beaten by Honda and Alfa

 

Hej Lars.
Det også godtnok på vej hjem men ved Horsens kom der en der ville lege og så kunne jeg ikke ladevær.Jeg havde speedometeret oppe på ca.275km/t v/6700omdr da jeg så løftede speederen var der blå røg over alt og da vi holdte ind til siden væltede der olie ud ved krumtapudluftningen (meget! det dryppede helt vildt & bunden er også smurt ind i olie!!.
Jeg rykker topstykket af i aften & håber så at det kun er ringene.

Skassa

 

Whats that in english?? Sounds more lime a melted piston. Special tool for heads bolts?? a 14mm socket?

 

I've just translated all this Danish stuff with Babelfish.com

Guess what? They say were all poofs, our football is cr@p and they hate us all. Worst of all they say we can't drive.

Oh, sorry, I pushed the wrong language. I put it through Argentinian by mistake.

F

 

Hi.
i took off the head tonight and it was indeed a meltet piston.but the bad news is that the cylinder is also scratch half way down from the top.so tommorow i will take out the engine and take it to a specialist to have it rebored and if he think so put in four new pistons.
I have just got a friend to make an adaptor for the fuelpressregolator so i can make the parralelfuelmod so it won`t happen again.

Skassa

 

Sorry to hear that Skassa, hopefully you will be ready for next years race at Knutstorp.

My comments to the above translation: We Danish people have NO interest in Football, but we are very proud to have Tom Christensen in the winning team on Le Mans. Winning the 24 hour race for the 3 time in a row, and for Tom Christensen it's his 4 win.

Lars

 

Lars,

I don´t know what your mods are, but I doubt your problem is due to the fuel rail. We do lots of conversions to over 300 BHP, a couple of them are driven VERY hard (German Autobahn, Nordschleife, ...) and NEVER had any problems your kind. (We always change the fuel pump for these conversions though)

The only problem we know what can cause a problem like yours is a faulty MAF (very common!) or the fuel pump. (we saw the pressure drop completely on boost with a few cars) I also know one case where 1 injector seemed to be faulty.

So before you possibly destroy another engine please check out these things!

Mark.

 

Hi.
Iàm doing both the fuelrailmod + put in a swirlpot to be feed by the original pump and a BMW 325i eE30 fuelpump to feed the fuelrails.
Mods are IHI-vf29 + link ecu + HKS hiper + homemade downpipe.
AFR was mapped at 0,88 at fullload!.
putting out 273hp-380nm at 1,3bar.

Skassa

 

Narrow band Oxy sensore reading cannot be relied on as accurate for tuning. 0.88v could cover a wide range of AFR's depending on sensor temperature, assuming a correctly functioning sensor. They are only accurate around stioch. 14.7:1 0.5v While they do give useful info, rich/lean, it should not be relied on totally. If you have a link ecu, get someone to MAP it properly, as if you have the control, and fuel pump can supply, that should never have happened.

 

...err...isn't the Impreza imfamous of letting lumps go after hard blasts?

I mean....WOT around 6500 rpm...in 5th...we are talking about a major load on the engine...and EGT's were prolly sky high as well.

It just takes 1 bad det if the pistons are really hot...

Was this with the stock fuel pump?

/J

 

Hi.
Yes it was with th stock fuelpump!.
I have just delevered the engine at a specialst and luckely it just need a rehone not a rebore and in with one new piston there is nothing else that is broken(great).
I will be op runing in the weekend maybe i should take a trip to you Jerry so you can map the link for me?.

skassa