yep willing to bet ring lands and did u do a leakdown test before head gasket
if not that sucks it woulda told u what was leaking from where. out int bent or burned valve, out exhaust the same as int, out crank case breather bad rings or broken cylinder wall.

 

Well u guys were right, it is ringlands......and even the piston from the cylinder which gave me good compression readings is dead.
Oh well, ive just ordered some arias pistons and eagle rods whilst its all apart.
Yeh i didnt do a leakdown test......my own stupid fault i guess, i could off saved myself from fitting the new head gasket etc.

At least the bores arnt scored, and the not ovalized....also checked the block to make sure its not warped....so it cud be worse + at least the engine has been fully re-built now.

Well thanks for ur help guys

 

yep
and good luck.. maybe look into getting som carillo or pauter rods or even manley rods. good luck.

 

Im really stuggling to find any companys in the UK that stock forged pistons.....anyone know of any?

Also what comp should i go for?i was thinking 9-8-1 as max boost i wanna run i like 12psi.......that sound about right?

 

Glad we could help out and identify the problem...
Can't u get the pistons from an American company & have them air-shipped?

As for the C/R, I'm a fan of low compression pistons, that way if there is a problem tuning and you run a little lean, there's not gonna be any damaging detonation... Then if you want more power just crank up the boost... Yes, the lag will be worse, but it's a trade-off between safety and turbo lag, choose your side... IMO 9.8:1 is a little high... I would go with 9.0:1, but that's just me...

 

Right in the case ill give 9:0:1 some thought, im running a stock fuel pump and only 440cc injectors atm so thats why i dont wana go to low comp and too high boost pressure. Whats the maximum u'd suggest with that fuoel pump and injector set-up?

I can get stuff air shipped from the US, but it takes so long at customs etc and i really need the car back on the road asap as im working all xmas and work quite far from home.

 

Good point...
Cool, that is the same setup I have... I'm running dsm 450's on a stock fuel pump...

I would have to say the maximum you should/could run is prob around 15psi ON A 14B... Although this all depends upon your turbo... the airflow at 15psi with a DSM 14B is alot less than 15psi of air from a t4 with an AR of .82 for example... So, what type of turbo are u using?

In know of a guy running a stock B16 with 12psi and I've heard he's gone to 14psi (same 14b setup as me) all on the same DSM 450's and stock pump setup...
So, it all depends upon the size of your turbo, which determines the amount of airflow into the motor... once this is known, then a maximum boost pressure can be calculated...

 

Im running a t304e turbo .57 trim .63 a/r. With 2.5 charge piping and a 3" down pipe.
Thanks agen man

 

Sure man, glad I can help out....

I cannot tell you definitively what boost is safe for you... It is a function of a whole slew of parameters, such as engine part material, flow characteristics of the intake and exhaust paths, etc...

You will need to do a thermodynamic analysis of your setup in order to theoretically know your maximum boost pressure (this can be done online now)...

Basically, you need to avoid detonation... If you don't know what this is, Google it...

You can also inquire about your setup, as it seems alot of people use that turbo for B-series turbo builds (cause it is most efficient where the torque peak of the motor is, aka high rpms) and see what they are running...

But what works for one may not work for you, so use caution....