Lcr rebuild no 2 :)

[paul-murphys]

Was it the spark plug at fault then? Id be wanting to find out what caused this if it was mine,

not sure i think was a valve as they were supertech but not the inconel ones im now using them on the next rebuild the other 3 cylinders were fine. im hoping can get the 6758 repaired waiting on issam to get a reply off borgwarner the car was running sweet immense power but everything happens for a reason

 

[ibizacupra]

there just the standard range plugs ive started stripping the 2 heads going to get the valves fitted with new stem seals and the head skimmed if needed, i had brought some new plugs br8eix but wouldnt fit as plug socket was to thick exhaust is 3" turbo back with tiny back box, also my egt are not going above 820 even when giving it some. just gutted as put time and money into this and this happens

std heat range plugs???? your kidding? Thats nuts

backpressure I refer to is not exhaust related Paul... but manifold/turbo hotside related... ie backpressure acting against the back of the exhaust valves (against the springs) - there was a reason you needed a stiffer actuator. think about it.

820'c is post turbine paul, so dont keep thinking thats ok relative to the 920'egt fuel dump zone on stock hardware.. which has egt sensor in the turbo's throat... ie Hotter measurement there than where yours is mounted.

Are there any marks in the piston crows and squish deck area on the head? Looked like there was some marks in the other combustion chamber on the pictures, but I cant be 100% from your images.

bad luck, but please bare these suggestion in mind, else it will happen again!

 

[ibizacupra]

not sure i think was a valve as they were supertech but not the inconel ones im now using them on the next rebuild the other 3 cylinders were fine. im hoping can get the 6758 repaired waiting on issam to get a reply off borgwarner the car was running sweet immense power but everything happens for a reason

not inconel exhaust valves?
why?

 

[james.l]

I don't want to be rude Paul and don't take this the wrong way but this would not be a suprise to me that this has happened.

Standard heat range plugs, non inconel valves, HIGH EGT's. I'm REALLY suprised that a mapper has not picked up on the high EGT's??

 

[ibizacupra]

and NOS?

 

[james.l]

Was the NOS actually in use???

 

[t0m]

Standard plugs on that power is a shocker tbh

 

[paul-murphys]

std heat range plugs???? your kidding? Thats nuts

backpressure I refer to is not exhaust related Paul... but manifold/turbo hotside related... ie backpressure acting against the back of the exhaust valves (against the springs) - there was a reason you needed a stiffer actuator. think about it.

820'c is post turbine paul, so dont keep thinking thats ok relative to the 920'egt fuel dump zone on stock hardware.. which has egt sensor in the turbo's throat... ie Hotter measurement there than where yours is mounted.

Are there any marks in the piston crows and squish deck area on the head? Looked like there was some marks in the other combustion chamber on the pictures, but I cant be 100% from your images.

bad luck, but please bare these suggestion in mind, else it will happen again!

hi bill i will bare it in mind, and niki has mapped in the fuel dump thing i dont know how it works but i trust his mapping, where would you mount the egt gauge, the 820 is maxing out the revs at 8k, will be back at camp in a few days so will look again when im back,

 

[paul-murphys]

not inconel exhaust valves?
why?

i ordered uprated valves but didnt really know the difference beetween the 2, i only found out didnt have the inconel ones when someone pointed out i thought supertech ones were all good

 

[paul-murphys]

I don't want to be rude Paul and don't take this the wrong way but this would not be a suprise to me that this has happened.

Standard heat range plugs, non inconel valves, HIGH EGT's. I'm REALLY suprised that a mapper has not picked up on the high EGT's??

i had uprated valves so i thougt they were ok ;( didnt know there were two sorts you can use the egt are not high and fuel dump has been put into the map, with regards to the plugs got a friend pushing 450 in a golf with 100 shot of nos and hes using they same plugs as me with no problems think its the exhuast valve thats caused all the carnage

 

[paul-murphys]

and NOS?

i run nos its not been ran on the rollers yet and logged was only a small jet so thought would be fine, the nos hasnt caused the damage its the valve ;( i had brought some new br8eix but couldnt get them to fit, ive learnt from my lesson i no its going to be and expensive lesson but learnt to upgrade the valves to the inocel ones, should i get new inlets too?

 

[paul-murphys]

Standard plugs on that power is a shocker tbh

i no people with more power running them get no ignition pull and very low correction factors when get engine back up and running will have a look into this more learn from your mistakes i guess

 

[Dan1720v]

i run nos its not been ran on the rollers yet and logged was only a small jet so thought would be fine, the nos hasnt caused the damage its the valve ;( i had brought some new br8eix but couldnt get them to fit, ive learnt from my lesson i no its going to be and expensive lesson but learnt to upgrade the valves to the inocel ones, should i get new inlets too?

Its heat that has caused the valve to fail more than likely.

 

[paul-murphys]

Its heat that has caused the valve to fail more than likely.

yep seems it going to go with the stronger valves this time an maybe even some new cams if can get hold of them turbo is being sent back to issam then to borgwarner for repair missing the car allready

 

[Dan1720v]

Tell me about it. Im left driving a 1.9 dci laguna after my turbo failure, However its saving me a **** load of money, thet'll promply be spent on the LCR lol

 

[paul-murphys]

i not even got a car yet just getting lifts feel lost without wheels but i'm working away a lot with work at min so can live with saving the money what turbo you going for next?

 

[James23Parkin]

Hindsight... We live and learn and I'm sure you'll learn from this and make the engine more robust and safer when using those figures.

Either way Paul, I admire the fact that you've made that big power step. It's unfortunate that the engine failed, considering the expense, but I hope it all works out and that it doesn't put you off the car.

James

 

[paul-murphys]

Hindsight... We live and learn and I'm sure you'll learn from this and make the engine more robust and safer when using those figures.

Either way Paul, I admire the fact that you've made that big power step. It's unfortunate that the engine failed, considering the expense, but I hope it all works out and that it doesn't put you off the car.

James

Hi mate yeah i have learnt from my lesson and i'm now going large port head so more gains possible
This mistake has cost me a lot, the old engine was upgraded but not enough and ive found out the hard way, when ordering parts for 1st engine build thought upgraded valves would be good enough but seems not and its not put me off just made me think of more upgrades can do for the car
and had a chat with graham the guy building the 4wd leon and i may now go with uprated cams when put car back together

 

[Dan1720v]

i not even got a car yet just getting lifts feel lost without wheels but i'm working away a lot with work at min so can live with saving the money what turbo you going for next?

Got a Holset HX35w en route to me

 

[ibizacupra]

i run nos its not been ran on the rollers yet and logged was only a small jet so thought would be fine, the nos hasnt caused the damage its the valve ;( i had brought some new br8eix but couldnt get them to fit, ive learnt from my lesson i no its going to be and expensive lesson but learnt to upgrade the valves to the inocel ones, should i get new inlets too?

paul, not being rude, so please dont take this the wrong way...

You did'nt know the difference between the valves to use and those not to use, did'nt know proper heat range plugs to use for your power output, used nos without checking it on the dyno to see if the maps up to it, yet you "know" its the exhaust valve which caused it. the question is what "caused" it to break..

EGT's
Manifold Pressures - T25 flanged unit (small) 400+bhp + NOS......
Det (as there are some signs of det on the pictures on the other cyl)

It can all happen so quick as to not see it coming. I know as its happened to me, and yes we all learn from it. whoever sold you stainless exhaust valves for your spec motor mis-sold you (IF) they knew your build.

EGT's post turbine are some 100-150'c Less than pre-turbine temps, Fuel dump is inherant in the ecu anyhows.. triggered in stock installs at 920'c (pre turbine in turbo housing) - yes niki mapped it to add fuel... but if he has'nt seen it on NOS who knows what would be going on?!?! Stock plugs is just daft idea and extremely ill advised no matter what your "mate" runs..



Stainless inlet valves should be fine. I run these.
Inconel exhaust valves should be used on turbo 1.8t (stainless on non-turbo application)


Get your motor checked out on niki's dyno with nos so he can make sure its going to run safe under nos