guillaume2 Posted June 21, 2009 Author Report Share Posted June 21, 2009 Now for mapping..... thats the hard part!Johnand expensive Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted October 6, 2009 Author Report Share Posted October 6, 2009 first mapping was made in July , with the standart ecu , it was difficult but finish by good , the first power was 165ch with 0,4bar , but after 300km test , we had a problem with engine , after having measured the compression ratio we found the cylinder 2 to 0 compression , actually I'm waiting for a place in a garage of a friend to open the engine to check problems , I looking for change pistons and rods like casperGTI , balanced crankshaft , shrink camshafts , hard clutch , I am not pressed because the QUAIFE occurs only in early 2010 , it leaves me time to disassemble and buy partsI think it's the pistons rings , I read and reread casper's post about the pistons and pistons rings , I contacted performances unlimited , they know this engine and rings problem now , it's a advantage , but I hope not to be damaged the block if it's a piston ring who broke Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted October 6, 2009 Report Share Posted October 6, 2009 Sorry to hear that.Just proves what i said in my build thread at the begining. Standard internals dont like boost Dave will help you out though. You will get a good set of internals!John Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 19, 2010 Author Report Share Posted February 19, 2010 it's start for replacement of -forged pistons and connecting rods-polishing pipes valves-Balancing crankshaft-strong clutch-lightening of flywheel-valves, springs and push new-and some other things last week , the engine has been released , It was very coldthis week , I dismantled the engine...to be continued Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 22, 2010 Author Report Share Posted February 22, 2010 Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 22, 2010 Author Report Share Posted February 22, 2010 (edited) Edited February 22, 2010 by guillaume2 Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted February 22, 2010 Report Share Posted February 22, 2010 That's what's happens when you don't use a decompression plate! That has made a big mess!Looks bad, is the block/bores damaged? Oversized pistons are gong to be needed, have you ordered yours through performance unlimited?John Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 22, 2010 Author Report Share Posted February 22, 2010 I don't know if it's a ring problem or ... "cliquetis" in French --> Auto Ignition???do you think I need the decompression plate with the forged piston's ? I don't think the block is damaged , this is in 3D , a small re-bore would be sufficient Quote Link to comment Share on other sites More sharing options...
99hjhm Posted February 22, 2010 Report Share Posted February 22, 2010 Anybody planning on nitrous, superchargers or turbos, take note.The problem is, cast pistons and a massive compression ratio... Causing detonation, busting the ring lands.Oh well, you know you need forged pistons, so thats a good thing, cant wait to see it rebuilt.If I were you, overbore it, nothing to loose (Depending on what John says) Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted February 22, 2010 Report Share Posted February 22, 2010 I don't know if it's a ring problem or ... "cliquetis" in French --> Auto Ignition???do you think I need the decompression plate with the forged piston's ? I don't think the block is damaged , this is in 3D , a small re-bore would be sufficientYes, you need a decompression plate OR need to drop the compression by shortening the rods by 3mm to drop the compression ratio to 8.5:1. If you do not, you will end up with pre-detination (pinking), which will melt your lovley new pistons.... and you will probably melt the valves and snap head bolts due to the CR being too high. After heavy driving, the charge air gets very warm, which also does not help.have you got any pictures of the bores? That piston has broken becasue of the high compression pressures you had when running boost and not lowering the compression ratio, the edges will give up before the crown on these pistons becasue of how high and how thick the centre gudgeon pin area is.have you ordered your pistons yet? Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 23, 2010 Author Report Share Posted February 23, 2010 (edited) Yes, you need a decompression plate OR need to drop the compression by shortening the rods by 3mm to drop the compression ratio to 8.5:1. If you do not, you will end up with pre-detination (pinking), which will melt your lovley new pistons.... and you will probably melt the valves and snap head bolts due to the CR being too high. After heavy driving, the charge air gets very warm, which also does not help.have you got any pictures of the bores? That piston has broken becasue of the high compression pressures you had when running boost and not lowering the compression ratio, the edges will give up before the crown on these pistons becasue of how high and how thick the centre gudgeon pin area is.have you ordered your pistons yet?not yet I have just 1 photo of the damaged cylinder Edited February 23, 2010 by guillaume2 Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted February 23, 2010 Author Report Share Posted February 23, 2010 I bought the decompression plate in august but the car does not work as , I will contact performance unlimited after re-boring the block casper --> do you thinks I can buy the same parts as you ? in the same size ? Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted February 23, 2010 Report Share Posted February 23, 2010 casper --> do you thinks I can buy the same parts as you ? in the same size ?No not in the same size. You will need to re-bore the block to remove the damage, if it is within the allowable limits for the engine. Then let dave at performance unlimited know the size of the bore that you have had the engine machined to, and he will design the pistons for your engine.John Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted March 1, 2010 Author Report Share Posted March 1, 2010 (edited) this week end was cleaning parts ! Edited March 1, 2010 by guillaume2 Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted March 1, 2010 Author Report Share Posted March 1, 2010 (edited) I discovered a hole in the block, is this normal in your opinionbehind the hole there the pellet blastingso ??? Edited March 1, 2010 by guillaume2 Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted March 1, 2010 Report Share Posted March 1, 2010 I am really not sure about that hole. I think there was one around there on my block, I will check the photos of my block and see if there was one there. John Quote Link to comment Share on other sites More sharing options...
99hjhm Posted March 1, 2010 Report Share Posted March 1, 2010 Are those the original bearings(shells)?? Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted March 1, 2010 Report Share Posted March 1, 2010 Yes, the hole should be there, mine has one. Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted March 1, 2010 Author Report Share Posted March 1, 2010 Are those the original bearings(shells)??yes Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted March 1, 2010 Author Report Share Posted March 1, 2010 Yes, the hole should be there, mine has one. ouf Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted May 1, 2010 Author Report Share Posted May 1, 2010 lightweight krankshaft (- 2,7kg) and flywheel (-1,7kg) are arrive , 2 weeks again to have pistons and rods Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted May 1, 2010 Report Share Posted May 1, 2010 (edited) Thats alot of weight lost, you will need to be on the throttle when the fan kicks in. And you might have issues with the engine idling. It will be good if it works though.You might have issues with the engine revving too fast and stalling the charger. Which will cause belt slip, i had that issue and had to change the pulleys to keep tension.Remember, with the new rods. You need to make new oil jets.I take it you got the same set as me from performance unlimited?John Edited May 1, 2010 by CasperGTI Quote Link to comment Share on other sites More sharing options...
99hjhm Posted May 1, 2010 Report Share Posted May 1, 2010 Thats alot of weight loss.Did that crank balance up? Would like to see how they did it. Quote Link to comment Share on other sites More sharing options...
guillaume2 Posted May 1, 2010 Author Report Share Posted May 1, 2010 casper --> yes it's the same set Quote Link to comment Share on other sites More sharing options...
CasperGTI Posted May 2, 2010 Report Share Posted May 2, 2010 casper --> yes it's the same set Good, you wont be disappointed with that.What bore size did you go for after the damage in your block? How much did you have to take off to remove the mark?John Quote Link to comment Share on other sites More sharing options...
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