k31th less WHY; more WOT Site Developer 29,424 Member For: 17y 10d Gender: Male Location: Melbourne Posted 10/12/19 09:13 AM Share Posted 10/12/19 09:13 AM umm, don't these guys know de-stroking is the way to go? wonder why they'd want to make the bore-to-stroke ratio even worse... even if the larger capacity makes more power on the same boost doesn't mean the engine is going to be safer. Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690589 Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 5m 24d Gender: Male Location: Perth Posted 10/12/19 09:26 AM Share Posted 10/12/19 09:26 AM Piston speed ??? Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690592 Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,424 Member For: 17y 10d Gender: Male Location: Melbourne Posted 10/12/19 09:28 AM Share Posted 10/12/19 09:28 AM you'd think that'd be putting extra stresses on the valvetrain and crankshaft+assembly bits. Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690593 Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 5m 24d Gender: Male Location: Perth Posted 10/12/19 09:52 AM Share Posted 10/12/19 09:52 AM Stroke would increase from 99.31 , To 103.9mm. Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690594 Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,424 Member For: 17y 10d Gender: Male Location: Melbourne Posted 10/12/19 10:30 AM Share Posted 10/12/19 10:30 AM that's fairly obvious Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690596 Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 5m 24d Gender: Male Location: Perth Posted 10/12/19 11:45 AM Share Posted 10/12/19 11:45 AM I actually worked it out... Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690602 Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,424 Member For: 17y 10d Gender: Male Location: Melbourne Posted 10/12/19 11:48 AM Share Posted 10/12/19 11:48 AM it says it raises it to 103mm on the link in the screenshot... and the stock stroke is easy to look up. 1 Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690603 Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 5m 24d Gender: Male Location: Perth Posted 10/12/19 11:54 AM Share Posted 10/12/19 11:54 AM I didnt read 103.9mm where does it say that. Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690605 Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 29,424 Member For: 17y 10d Gender: Male Location: Melbourne Posted 10/12/19 11:57 AM Share Posted 10/12/19 11:57 AM 103mm it says ->https://www.spoolimports.com/blog/post/big-block-barra-results (I edited my post to say that above because I only remembered the 103mm rather than 103.9 like you calculated). also on the link to the "4.2 stroker kit" it says 103mm all over it -> https://www.spoolimports.com/ford-barra-stroker-kit-4-2 Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690606 Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 17y 5m 24d Gender: Male Location: Perth Posted 10/12/19 12:04 PM Share Posted 10/12/19 12:04 PM Yep so 103 mm which isn't 103.9 mm 103 mm isn't 4.2L Link to comment https://www.fordxr6turbo.com/forum/topic/44361-the-off-topic-thread/page/9885/#findComment-1690607 Share on other sites More sharing options...
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