Lurksalot Posted May 9, 2008 Posted May 9, 2008 What you gonna get Jeff????? A Durabang? will see how this season goes in bike engined class, I reckon I will be off the pace of the durabangs and big bhp vx"s that will be in the same race as me so may move up for next year... thats If I get the bug that is Jeff , you WILL get the bug .... regards the piston , the fact the top end got stuck up top , the lower end let go seems a bit sus if the others are showing the same signs ? Quote
conibear Posted May 9, 2008 Posted May 9, 2008 can anyone offer an opinion on what would make a piston crack in this manner Simply not up to it No point in naming them either, that won't get you anywhere. I think you are being optimistic in getting any goodwill, but good luck Quote
JeffC Posted May 9, 2008 Author Posted May 9, 2008 can anyone offer an opinion on what would make a piston crack in this manner Simply not up to it No point in naming them either, that won't get you anywhere. I think you are being optimistic in getting any goodwill, but good luck they are wiseco pistons at thick end of £800 a set they should be up to the job or certainly last more than 16 hours surely Quote
conibear Posted May 9, 2008 Posted May 9, 2008 Do you know what sort of compression you had Fuel, oil normal No addatives used Quote
JeffC Posted May 9, 2008 Author Posted May 9, 2008 Do you know what sort of compression you had Fuel, oil normal No addatives used my man tells me everything inside the motor looks as he would expect, no detination to the pistons all the valves the right colour, bores fine (at least 3 of them) rings fine, no sign of oil starvation anywhere. Ive oil changed it every other time Ive used it, very rarely rev it as far as the limiter , I drive it but also look after it always run on super unleaded as this is what it was mapped on, dont know on compression but its the same spec as the powertec engine used in the Radicals without any issues, he said hes never known a wiseco piston fail Quote
conibear Posted May 9, 2008 Posted May 9, 2008 The bottom end normally fails when the top end creates too much, therefore one would say, the top end is making too much or the bottom simply ain't up to it. Is the head worked Quote
JeffC Posted May 10, 2008 Author Posted May 10, 2008 yep cams, ported/flowed etc , billet stroker crank , steel rods its a full spec motor with the price of the donor engine its close to £10ks worth Quote
Matt Seabrook Posted May 10, 2008 Posted May 10, 2008 Jeff a good place to start would be to get your engine builder to make a report and get a second opinion from another independent source. Invite the piston manufacturer to have a look at the engine. It sounds like you may have a case to me. We had a problem with a recon unit we fitted to a Peugeot Partner van. When we sent it back to the reconditioned they denied it was there problem ie the heavy oil consumption due to glazed bores. They told us that it was down to over fueling. An emissions test at MOT showed there was no problem with that, the injectors and fuel pump had been sent away for testing and came back no fault. They still denied there was any problem with the way it had been reconditioned. So I stripped the engine for a look on removing the sump we found that the crank looked like it had been attacked with a hammer and chisel. We sent the photos off to them and contacted there trade association and suddenly the engine turned out to be not up the there normal standard You may have a fight on your hands but at £800 it could be worth a shot. I still reckon my first idea was best and that was to fit a stock lump and sort a good one in your own time. Quote
JeffC Posted May 10, 2008 Author Posted May 10, 2008 timing couldnt be worse though, allready commited to getting this engine built now and need it back /run in/ tried tested for saturday. not looking promising though, pistons wont arrive till Tuesday, Ive asked for the crank to be balanced now to be sure its ok in case that has a fault causing the pistons to fail that will be Wednesday at the earliest before its back then its a full engine to be built up , courrier to collect and deliver to me , exhaust manifold to get made fitted etc. It sounds do -able but is going to be a fooking big rush around on Friday oh and My mistake on the piston price they are £520 not £800 Quote
slippy Posted May 10, 2008 Posted May 10, 2008 If you need any assistance Coop let me know, not a great deal I can assist with the rebuild but I am up and down the country plenty so if you need any parts etc collecting give me a shout Quote
Pilot Pete Posted May 10, 2008 Posted May 10, 2008 timing couldnt be worse though, allready commited to getting this engine built now and need it back /run in/ tried tested for saturday. not looking promising though, pistons wont arrive till Tuesday, Ive asked for the crank to be balanced now to be sure its ok in case that has a fault causing the pistons to fail that will be Wednesday at the earliest before its back then its a full engine to be built up , courrier to collect and deliver to me , exhaust manifold to get made fitted etc. It sounds do -able but is going to be a fooking big rush around on Friday oh and My mistake on the piston price they are £520 not £800 Why not just get the standard lump for this race and then flog it on afterwards, you shouldn't lose a lot and at least you'll be racing. If your 1500 beasty arrives on time, by all means fit it, either way you'll be on track. Quote
JeffC Posted May 10, 2008 Author Posted May 10, 2008 its one or the other Pete aint spending a further £2500 on an engine as well as the money for the 1550 rebuild , plus dry sump/ crank genny and other bits are down at the engine builders reckon the rebuild way is do-able will be tight on time but should be okk if things go my way and I must be due a change of luck surely its just s**t waiting around knowing Ive got so much to do and cant start any of it till the motor comes back which best will in the world is going to be Thursday/ Friday and thats if the crank turns out to be ok and the pistons arrive on time if it turns out to be fookd will chuck a standard lump in it and race that Matt , you are right in what you suggest but heart wins head everytime with me Quote
Pilot Pete Posted May 10, 2008 Posted May 10, 2008 Matt , you are right in what you suggest but heart wins head everytime with me Nope, agree with you there! 1300 lump makes the most sense in everyway, but there's no going back from the 1500 is there really! Quote
perksy Posted May 10, 2008 Posted May 10, 2008 Worth emailing some photo's to Wiseco Jeff and asking their opinion They will probably want to inspect/test the pistons before making a decision though 3rd party report/evidence will help Strange that it's affected All 4 though Wouldn't rush the rebuild/install Mate Better to take a little bit longer and get Everything right Good Luck Quote
conibear Posted May 12, 2008 Posted May 12, 2008 NSCC should refund or carry over your race entry fee though If yes, then you might as well keep your fingers crossed, if not Quote
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