Silvertop oversize pistons are readily available. I think mine failed due to about 20 track days approx 10 with turbo and too much fuel at start up. I also ran with standard compression and there was significant evidence of pre detonation particularly on the #3 piston which failed. However I dont think it was significant enough to be the cause. I dont yet have the piston, so haven't inspected it in detail. I do have a second engine but that has worn bores. One option is to use that but with the block sleeved so I can reuse those pistons. Does anyone have experience of sleeving, I dont, so am hesitant to go that route.
On Fri, 26 Mar 2021, 16:37 list...@liberator-systems.co.uk, < lists...@liberator-systems.co.uk> wrote: > I was planning to drop a 2.0l blacktop and possibly turbo into my saloon. > This piston availablity issue is making me think twice. Is it the same > problem for the old silvertop? How many manufacturers are there for > standard type pistons? Wondering how the engine reconditioning businesses > source their pistons. > > John > > On Thursday, 25 March 2021 at 18:36:23 UTC nige...@gmail.com wrote: > >> Thanks Jim, will respond to your other later, some interesting points! >> Oversize pistons for blacktop are quoted for on plenty of web sites, but >> are never available. Supplier calls the manufacturer and they all come back >> with same story. >> Regards >> >> On Thu, 25 Mar 2021, 16:23 Jim Hearne, <j...@quantums.info> wrote: >> >>> As you say, i don’t think Ford sells pistons for a Black top Zetec as a >>> spare, they want you to replace the whole bottom end. >>> The Zetec SE is the same. >>> >>> Jim >>> >>> >>> *From:* susanandmartin >>> *Sent:* Thursday, March 25, 2021 3:28 PM >>> *To:* quantu...@googlegroups.com >>> *Subject:* RE: [Quantum Owners] 2L Zetec Blacktop Pistons >>> >>> >>> Not that it helps with your quest, but (hopefully) of interest. >>> >>> When I was working at Ford we had an engine being tested for cold start >>> durability at a University. As proof (if it was ever needed) that starting >>> an engine repeatedly from cold with a fuel-enriched intake mixture would >>> wreck an engine, there was a need for new pistons after several months and >>> x000’s of start procedures. When trying to source new pistons, however, it >>> was found they were not listed as a spare and could only be bought with an >>> engine block. As this wouldn’t help our engine block durability testing, >>> great discussions ensued taking several hours and it was agreed some >>> pistons could be supplied direct from the assembly line (maybe one car was >>> released without pistons? 😊). This is a good example of how Ford goes >>> to great lengths with their testing (and probably other manufacturers do as >>> well). >>> >>> Martin Scott >>> >>> >>> >>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for >>> Windows 10 >>> >>> >>> >>> *From: *Nigel Plant >>> *Sent: *25 March 2021 12:15 >>> *To: *Quantum Owners Group >>> *Subject: *[Quantum Owners] 2L Zetec Blacktop Pistons >>> >>> >>> >>> Probably one that's right up Jim's street. Does anyone have the Ford >>> specification for 2L Zetec blacktop pistons. Need gudgeon pin diameter, >>> compression height essentially all the key dimensions. I have broken a >>> piston on my Xtreme turbo such that it needs reboring and cannot get any >>> standard but oversize pistons. Am also told that Nural and Mahle have no >>> production plans to manufacture any. I can get forged pistons and rods, >>> which would be better performance wise but didn't want to drop compression >>> to 8:1 or fork out £1200. 9:1 is my ideal for the power I want. I have >>> found a custom piston manufacture for forged pistons alone, but they >>> require a piston (no problem) and the key specs. >>> >>> >>> >>> For information, I have learnt one interesting point that people may >>> find useful. Although the silvertop and black top have different length >>> conrods (ctr to ctr) and different compression heights. The combined total >>> of conrod length and compression height for the silvertop and blacktop are >>> the same, meaning a set of silvertop conrods and pistons can be used to >>> replace the blacktop ones. >>> >>> >>> >>> Thanks for any help on the specs. >>> >>> >>> >>> Nigel Plant >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Quantum Owners Group" group. >>> To post to this group, send email to quantu...@googlegroups.com >>> To unsubscribe from this group, send email to >>> quantumowner...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/quantumowners?hl=en >>> >>> IMPORTANT NOTE: All information presented herewith is provided on an "As >>> Is" basis, without warranty or the implication thereof. Neither the Quantum >>> Owners Club nor the individuals associated with the Quantum Owners Club or >>> in the preparation of the above information shall have any liability to any >>> person or entity with respect to liability, loss, or damage caused or >>> alleged to be caused directly or indirectly by the instructions contained >>> within this or related message(s). >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Quantum Owners Group" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to quantumowner...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/quantumowners/f7746385-3a1a-4d8c-b901-f6b726a67128n%40googlegroups.com >>> <https://groups.google.com/d/msgid/quantumowners/f7746385-3a1a-4d8c-b901-f6b726a67128n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Quantum Owners Group" group. >>> To post to this group, send email to quantu...@googlegroups.com >>> To unsubscribe from this group, send email to >>> quantumowner...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/quantumowners?hl=en >>> >>> IMPORTANT NOTE: All information presented herewith is provided on an "As >>> Is" basis, without warranty or the implication thereof. Neither the Quantum >>> Owners Club nor the individuals associated with the Quantum Owners Club or >>> in the preparation of the above information shall have any liability to any >>> person or entity with respect to liability, loss, or damage caused or >>> alleged to be caused directly or indirectly by the instructions contained >>> within this or related message(s). >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "Quantum Owners Group" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to quantumowner...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/quantumowners/605cac02.1c69fb81.6c006.721fSMTPIN_ADDED_MISSING%40gmr-mx.google.com >>> <https://groups.google.com/d/msgid/quantumowners/605cac02.1c69fb81.6c006.721fSMTPIN_ADDED_MISSING%40gmr-mx.google.com?utm_medium=email&utm_source=footer> >>> . >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Quantum Owners Group" group. >>> To post to this group, send email to quantu...@googlegroups.com >>> To unsubscribe from this group, send email to >>> quantumowner...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/quantumowners?hl=en >>> >>> IMPORTANT NOTE: All information presented herewith is provided on an "As >>> Is" basis, without warranty or the implication thereof. Neither the Quantum >>> Owners Club nor the individuals associated with the Quantum Owners Club or >>> in the preparation of the above information shall have any liability to any >>> person or entity with respect to liability, loss, or damage caused or >>> alleged to be caused directly or indirectly by the instructions contained >>> within this or related message(s). >>> --- >>> >> You received this message because you are subscribed to a topic in the >>> Google Groups "Quantum Owners Group" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/quantumowners/h0WcBPGGEmI/unsubscribe. >>> To unsubscribe from this group and all its topics, send an email to >>> quantumowner...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/quantumowners/F9F61C313F874DC69459BA51EB68A588%40JimQuad >>> <https://groups.google.com/d/msgid/quantumowners/F9F61C313F874DC69459BA51EB68A588%40JimQuad?utm_medium=email&utm_source=footer> >>> . >>> >> -- > -- > You received this message because you are subscribed to the Google Groups > "Quantum Owners Group" group. > To post to this group, send email to quantumowners@googlegroups.com > To unsubscribe from this group, send email to > quantumowners-unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/quantumowners?hl=en > > IMPORTANT NOTE: All information presented herewith is provided on an "As > Is" basis, without warranty or the implication thereof. Neither the Quantum > Owners Club nor the individuals associated with the Quantum Owners Club or > in the preparation of the above information shall have any liability to any > person or entity with respect to liability, loss, or damage caused or > alleged to be caused directly or indirectly by the instructions contained > within this or related message(s). > --- > You received this message because you are subscribed to a topic in the > Google Groups "Quantum Owners Group" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/quantumowners/h0WcBPGGEmI/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > quantumowners+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/quantumowners/4ccd9719-0212-4222-ad27-68cba4df9db5n%40googlegroups.com > <https://groups.google.com/d/msgid/quantumowners/4ccd9719-0212-4222-ad27-68cba4df9db5n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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