JamieP Posted January 28, 2011 Share Posted January 28, 2011 Not heard of problems with CP before but I went with mahle this time, its all done now so will be back in the car shortly. Quote Link to comment Share on other sites More sharing options...
sdistc Posted January 28, 2011 Share Posted January 28, 2011 As I said, it's entirely possible that I had a bad batch. Or the tune was bad, in some unforeseeable way. Or I screwed up somehow while running the engine in. But in my experience, I was not satisfied with durability of the pistons that were used and will not use the brand again. Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 29, 2011 Share Posted January 29, 2011 I would be more inclined to believe the tune was bad, was you using any boost at all on run in? Quote Link to comment Share on other sites More sharing options...
dude Posted January 29, 2011 Share Posted January 29, 2011 Not to throw the cat among the pigeons here, boys... but my car went through 2 sets of CP pistons during its *run-in* period. That is, melted 2 separate sets of pistons over 2 separate break-in periods for the engine. No problems with the tune, and the run-in was pretty gentle (especially the second time) to avoid any "user" error. Pistons were even sent off for analysis to CP, who of course said there was nothing wrong with their product. Now, the final set of pistons (now in the engine) were ceramic coated (and I'm not even sure if they're CP) and the VVTi was locked to avoid any potential confounding factors from that aspect, and car is running strong. But I will never again put CP pistons in any engine build I do. Plenty of 6 second cars in the states running CP's, I take them over any other make any day. Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 8, 2011 Author Share Posted February 8, 2011 well i think we have found the problem with mine, the injectors are knackered Quote Link to comment Share on other sites More sharing options...
Bailey. Posted February 8, 2011 Share Posted February 8, 2011 At least it sounds like you have found a definate cause, puts any worries out of your mind for when she back up and running. When you say injectors, all of them or just 1 or?? Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 8, 2011 Author Share Posted February 8, 2011 no i dont think there very well balanced or somthing paul had them checked today and there about 10% out or somthing i think thats what he said:innocent: im sure he will comment when he see's this i did have a bit of good news today though my turbo is ok paul was a bit worried there could be some sh1t init and caused damage but there wasn't thank god:) Quote Link to comment Share on other sites More sharing options...
Bailey. Posted February 8, 2011 Share Posted February 8, 2011 Thats good news, not cheap replacing a to4z,lol Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 8, 2011 Author Share Posted February 8, 2011 no ive had replace everything else though lol Quote Link to comment Share on other sites More sharing options...
tony tt Posted February 8, 2011 Share Posted February 8, 2011 I seen you going down the A12 with it on the trailer last week mate. Good luck with gettin it back on the road. Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 8, 2011 Author Share Posted February 8, 2011 thanks mate Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted February 9, 2011 Share Posted February 9, 2011 Good luck getting it sorted chap, that piston was a nasty mess! Quote Link to comment Share on other sites More sharing options...
Rob_Mitchell Posted February 9, 2011 Share Posted February 9, 2011 bit late but just seen the pics, fooked i think. unless your pockets are endless i would knock the thunder roads on the head. Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2011 Share Posted February 9, 2011 What injectors you using as replacements? The FIC bosch units are good and they come in flow matched sets with a data sheet Quote Link to comment Share on other sites More sharing options...
Jellybean Posted February 9, 2011 Share Posted February 9, 2011 At least the Turbo is all good, hope it is not too expensive to fix. Just a bit confused , how the injector would cause the piston to melt, what are the implications of having an injector 10% out? what issues can arise? I presume the injector cycle is set by the mapper? Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2011 Share Posted February 9, 2011 Just a bit confused , how the injector would cause the piston to melt, what are the implications of having an injector 10% out? what issues can arise? I presume the injector cycle is set by the mapper? The injector didnt cause the piston to melt, it was the lack of fuel If the injector flows are out by 10% and the correction values are not updated on the ECU then you could be 10% down on fuel for that cylinder. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted February 9, 2011 Share Posted February 9, 2011 The injector didnt cause the piston to melt, it was the lack of fuel If the injector flows are out by 10% and the correction values are not updated on the ECU then you could be 10% down on fuel for that cylinder. Wish I didnt know that could cause such catostrophic damage Is it possible to monitor things like this, Lack of fuel/injector. Would this have to happen over a long period of time? Quote Link to comment Share on other sites More sharing options...
Wez Posted February 9, 2011 Share Posted February 9, 2011 Is it possible to monitor things like this, Lack of fuel/injector. Would this have to happen over a long period of time? Yes, for example the Syvecs ECU can monitor knock per cylinder out of the box You could also monitor EGT and AFR per cylinder but it all starts getting very expensive and not really worthwhile, on a very very expensive race car engine fair enough. Quote Link to comment Share on other sites More sharing options...
Jellybean Posted February 9, 2011 Share Posted February 9, 2011 (edited) In short if you are putting $$ into a Single invest in Ryan G and a Syvecs ECU to ensure it stays healthy I see she is running Siemens 850cc injectors (fully flow balanced); is it common to have an injector fail Sorry for all the Q's just interested as I plan to go single, the old age question of OEM vs Built Engines Edited February 9, 2011 by Jellybean (see edit history) Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 9, 2011 Author Share Posted February 9, 2011 What injectors you using as replacements? The FIC bosch units are good and they come in flow matched sets with a data sheet im going for injector dynamics 1000cc's from paul Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 9, 2011 Author Share Posted February 9, 2011 In short if you are putting $$ into a Single invest in Ryan G and a Syvecs ECU to ensure it stays healthy I see she is running Siemens 850cc injectors (fully flow balanced); is it common to have an injector fail Sorry for all the Q's just interested as I plan to go single, the old age question of OEM vs Built Engines yes it has the siemens 850cc injectors i spoke to earnie the other day and he said he had them cleaned and checked when the last engine died but they are a little old now as they were already on the car when he purchased it. so out with the old and in with the new plus a syvecs Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted February 9, 2011 Share Posted February 9, 2011 im going for injector dynamics 1000cc's from paul Dont forget one of my lovely new fuel rail kits I'm about to release! Quote Link to comment Share on other sites More sharing options...
mikeyh Posted February 9, 2011 Author Share Posted February 9, 2011 Dont forget one of my lovely new fuel rail kits I'm about to release! oh yes and one of pauls latest fuel rails;) Quote Link to comment Share on other sites More sharing options...
mikeyh Posted March 19, 2011 Author Share Posted March 19, 2011 thought id post a little update the cylinder head on mine has been a bit of a pain needed a new valve and all valves reseated etc plus i need new shimless buckets which are not bloody cheap:blink: once the head is assembled darren will be starting on the bottom end then hopfully it will all go to plan with no more problems im realy starting to miss it Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted March 22, 2011 Share Posted March 22, 2011 Small update: Cylinder head all built up ready to be installed now. Complete pain in the backside due to the valve seats having to be machined so it threw all of the valve clearances out. Normally this isn't an issue with the standard bucket/shim but because this head already has shimless buckets there isn't a huge size range available. Its all done now anyway. http://garagewhifbitz.co.uk/images/stories/gw_images/forum pics/mikeh/cylinderhea.jpg Quote Link to comment Share on other sites More sharing options...
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