k31th less WHY; more WOT Site Developer 30,020 Member For: 18y 4m 5d Gender: Male Location: Melbourne Posted 10/12/19 09:13 AM 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.
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 9m 19d Gender: Male Location: Perth Posted 10/12/19 09:26 AM Posted 10/12/19 09:26 AM Piston speed ???
k31th less WHY; more WOT Site Developer 30,020 Member For: 18y 4m 5d Gender: Male Location: Melbourne Posted 10/12/19 09:28 AM Posted 10/12/19 09:28 AM you'd think that'd be putting extra stresses on the valvetrain and crankshaft+assembly bits.
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 9m 19d Gender: Male Location: Perth Posted 10/12/19 09:52 AM Posted 10/12/19 09:52 AM Stroke would increase from 99.31 , To 103.9mm.
k31th less WHY; more WOT Site Developer 30,020 Member For: 18y 4m 5d Gender: Male Location: Melbourne Posted 10/12/19 10:30 AM Posted 10/12/19 10:30 AM that's fairly obvious
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 9m 19d Gender: Male Location: Perth Posted 10/12/19 11:45 AM Posted 10/12/19 11:45 AM I actually worked it out...
k31th less WHY; more WOT Site Developer 30,020 Member For: 18y 4m 5d Gender: Male Location: Melbourne Posted 10/12/19 11:48 AM 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
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 9m 19d Gender: Male Location: Perth Posted 10/12/19 11:54 AM Posted 10/12/19 11:54 AM I didnt read 103.9mm where does it say that.
k31th less WHY; more WOT Site Developer 30,020 Member For: 18y 4m 5d Gender: Male Location: Melbourne Posted 10/12/19 11:57 AM 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
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 9m 19d Gender: Male Location: Perth Posted 10/12/19 12:04 PM Posted 10/12/19 12:04 PM Yep so 103 mm which isn't 103.9 mm 103 mm isn't 4.2L
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