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how much power can p1 heads take standerd

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Old 13 January 2012, 01:53 PM
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Aamar786
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Default how much power can p1 heads take standerd

as above wat is the maximum power my p1 heads can take?
Old 13 January 2012, 02:06 PM
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any help???
Old 13 January 2012, 02:12 PM
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nick type r
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Most people say around the 350 mark with standard internals and gearbox.
Old 13 January 2012, 02:17 PM
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^ Sorry didnt read question properly , not sure about the heads.
Old 13 January 2012, 02:21 PM
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acccordin to the thread i just read on p1 woc they can run 500 plus
Old 13 January 2012, 02:25 PM
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The cams will probably run to 550 ish but at a minimum I would change the valves for one piece items
Old 13 January 2012, 02:38 PM
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ive got uprated cams and shimless buckets, well atlest colin minton tod me he put em inj but cant guarantee he did
Old 13 January 2012, 03:07 PM
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banny sti
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If the standard 2 piece valve breaks bye bye engine
Old 13 January 2012, 03:19 PM
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how much can standered valves take?
Old 13 January 2012, 03:39 PM
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banny sti
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They might last at your chosen power level or they might not, I would not risk it but its your choice
Old 13 January 2012, 03:50 PM
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Alan Jeffery
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Heads don't take, they give, in terms of flow.
A cylinder head is there to perform a function and isn't subject to stress failure as such, apart from over revving the valve train.
Version 5/6 heads such as the P1 will support anything up to around 550 bhp plus before any kind of work on them becomes really useful.
Old 13 January 2012, 03:53 PM
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Originally Posted by Alan Jeffery
Heads don't take, they give, in terms of flow.
A cylinder head is there to perform a function and isn't subject to stress failure as such, apart from over revving the valve train.
Version 5/6 heads such as the P1 will support anything up to around 550 bhp plus before any kind of work on them becomes really useful.

so would i be safe with 450bhp with completly stanered top end? or do i need to think bnout valves
Old 13 January 2012, 08:34 PM
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snake1906
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im going to be giving mine minimum of 500 on standard heads
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