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Old 29-03-2008, 11:59 AM
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Rippers
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In terms of power difference what are the stages in terms of power?
Is a standard inlet is 24mm? good for how much power?
Then you get polished versions.. good for how much power?
Then opened up to 25mm? good for how much power?
Whats next?

This is mine:- measures 25mm top to bottom and is very polished and smooth and my inlet manifold has been matched to it


Old 29-03-2008, 12:20 PM
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Turbo Zetec
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i'd like to know the answer to this one too...
Old 29-03-2008, 12:23 PM
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R5FORD
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me 2 as i need to know soon
Old 29-03-2008, 12:59 PM
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col cos1
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will let you know once my car is back on the rollers

ive changed my standard head for 26 inlet and 25 exhaust porting
Old 30-03-2008, 01:35 AM
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noone else knows then
Old 30-03-2008, 03:17 AM
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Originally Posted by Paul Ripley
In terms of power difference what are the stages in terms of power?
Is a standard inlet is 24mm? good for how much power?
Then you get polished versions.. good for how much power?
Then opened up to 25mm? good for how much power?
Whats next?

This is mine:- measures 25mm top to bottom and is very polished and smooth and my inlet manifold has been matched to it


IIRC 25mm/25mm ports equate to flow potential for 500-540bhp and 26mm/25mm are good for 600bhp+.
Old 30-03-2008, 10:47 AM
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Rippers
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Cheers

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Old 30-03-2008, 04:44 PM
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That head looks identical to mine which was done for a 450ish build.

The finish looks rough on photos (more so with flash) but is very smooth to touch. The web between the ports is also very sharp.

Interested in the comments you get as no one seems to want to talk about heads or divuldge specs
Old 30-03-2008, 04:50 PM
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Is it that simple as putting set limits as there is so much else to consider with turbo, cams, manifolds etc? I remember seeing over 420 @ wheels on a standard head and cams before.
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