Blown engine!! (The importance of tunning) pics inside.


JIMBOB-EK9

JIMBOB-EK9

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I am just posting this to show everyone the importance of having a car properly tuned when modified. :secret:

This was a B18C4 block with JDM ITR crank/rods/pistons B16A head with JDM ITR valve train & cams, matted together with a buddyclub head gasket!

This was running on a JDM ITR P73 ecu

With the engine being a C4 & using ITR internals, it should have been mapped properly due to the diffrance in CR it would have had IMHO.

This is the result-
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Sorry for the crap pics & post but I'm posting this off my iPhone while in the garage!:secret:
 
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May I ask of who did the mapping? :wow:

Sorry to hear about this and hope you get things sorted out!
 
Thats bad, that setup will yield the same CR of a JDM B18C ITR engine, the only thing increasing the CR would be the BC Headgasket (if thinner).
 
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I really would of thought that setup would work on the p73 ecu!! Thats mental.
 
Out of interest, how long was this setup running before it came to this mess?
 
civic4g said:
Thats bad, that setup will yield the same CR of a JDM B18C ITR engine, the only thing increasing the CR would be the BC Headgasket (if thinner).
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I would have thought the same tbh mate (u sure the b16a heads are the same as ITR?) but I can't see anything else being the cause of this.
The engine had covered around 3000 miles befor being stood for 12 months, then I fitted it into the ej9 giving it a full service while fitting!
Drove it for around 1 month with this engine & went bang while out on a spirited drive just as he was changing into 3rd at 8000+rpm.

Pat said:
:( That isnt the prettiest site
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Your right it's not matey, I feel your pain but aleast your car is back running with it's b16b!:naughty:


Willis said:
I really would of thought that setup would work on the p73 ecu!! Thats mental.
Click to expand...

So did I mate which is why I didn't say anything while fitting the engine, but I can't see any other signs of a cause!!
 
Hang on a second, this engine has got a knock sensor connected ? It should of been pulling timing out to stop any det on a stock ecu. That first picture with the destroyed valve gets me thinking a bit. I'll take another look when i get back as i'm on the net on my phone as its not 100% clear. I honestly can't see a thin headgasket bumping the C/R up enough to cause this sort of damage. Has the head or block been skimmed a fair bit ?
 
Doesnt look too good jim :(
Remember, a bad quality map can be just as bad as having no map at all. When i got my car mapped by a gunther tuner here in Ireland, it overfuelled like a pig and I had a lot of issues with it. Took of the head and the engine and the top of each cylinder was a different colour. Some of the valves were chalked up completely while others were black.
Pistons had massive amounts of carbon build up on them too.
Choosing a good mapper is vital to engine logetivity ;).
 
Can you give us a close up of the pistons and squish bands on the cylinders that didnt have a valve break off inside it?
I'd love to see the extent of the detonation damage caused by that!
 
Horrifying site..i wish your friend all the best in getting a replacement.
 
Looks to be some major det going on in the other cylinder
 
Aonghus, wouldnt the ecu of been pulling timing out though ? It looks like the pistons made contact with that valve from here. I'll look again when i get to my laptop.
 
Rich777 said:
Aonghus, wouldnt the ecu of been pulling timing out though ? It looks like the pistons made contact with that valve from here. I'll look again when i get to my laptop.
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There's only so much timing the ecu can pull and that's if it even picks up on it. I'm looking at pics on my iphone and from what I can make out the other cylinders(not one which head of valve fell off) have lots of bits blown out of pistons and one even seems to have a sizeable chip blown out of piston
 
Its just that valve that makes me think. Why would it look like that ? I seen a B16 once that made piston to valve contact and it looked the same as this. Apparently the engine wasnt detonating. I was never to sure about it though because all the other cylinders just looked like they had detonation damage like this. The other thing is the C/R difference would of been minimal. I honestly can't see a thin head gasket bumping the C/R up that much it would cause this sort of damage. I could be totally wrong in what i'm saying but do you see where i'm coming from ? how many people remove there head and get it skimmed and run a stock ECU ? There must be loads out there and i bet non of them ended up like this.
 
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