Brendan XR6-T Member 88 Member For: 15y 8m 25d Gender: Male Posted 31/03/10 02:55 AM Share Posted 31/03/10 02:55 AM I have been considering doing more mods to see around 350rwkw or wait abit more and go 380rwkw but I have been warned not to push the bottom end as it might go bang. Which brings me to..After much research between BFmk1 differences to BF mk2 I had come to the conclusion that I'll never find out exactly what I was after.. which is, whats the differences between the 2 models when it comes to the valve springs and the rods. As there is so many different opinions here and there over different forums, etc.. I ended up calling ##### Ford parts and spoke to the bloke and asked him to look at the part numbers between the models from (my)BF MK1 11/05 and onwards to the BF MK2 2008 xr6 turbos. He said from 09/2005 onwards to the fg the valve springs had the same part number. And from 04/2007 the rods changed there part number. Please dont crucify me as I know this is a touchy subject to some and by no means am I saying this is gospel just wanted to share my knowledge from as far as I could go.. Mind you this doesnt help me with the bottom end looks like the buck's gunna stop at 350rwkw unless I win lotto. Link to comment https://www.fordxr6turbo.com/forum/topic/67240-maybe-a-spanner-in-the-works/ Share on other sites More sharing options...
icer Banned 2,335 Member For: 15y 9m 29d Gender: Male Location: Aspendale, Vic. Posted 31/03/10 03:34 AM Share Posted 31/03/10 03:34 AM (edited) bf 06/06 and onwards use the F6 bottom end. Stronger. Can hold a fair bit more power then the ba motors. Stronger rods, valve springs are just a start.Plenty of BF 06/06+ running low 400rwkw on this forum.Minimal BAs running over 340rwkw without problems.Mine blew @ 320rwkw (after just 6 hours of taking it out from tuner!!!)Got an 07 tornado (same as f6 06/06+ motor) and reaching 400rwkw without drama's (yet and hopefully wont get any, anytime soon!). Still using standard valve springs/bottom end.You will REALLY be pushing for 350rwkw. Be happy to make 340rwkw @ 17/18psi. And that's already pushign your luck... Edited 31/03/10 03:35 AM by icer Link to comment https://www.fordxr6turbo.com/forum/topic/67240-maybe-a-spanner-in-the-works/#findComment-996396 Share on other sites More sharing options...
Brendan XR6-T Member 88 Member For: 15y 8m 25d Gender: Male Posted 31/03/10 05:28 AM Author Share Posted 31/03/10 05:28 AM fair call might stick with 320rwkw seems that could be the limit. It goes gr8 now but cant help but want more. no point running so close to the danger zone unless I got the coin to back it up for a blown motor. Link to comment https://www.fordxr6turbo.com/forum/topic/67240-maybe-a-spanner-in-the-works/#findComment-996420 Share on other sites More sharing options...
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