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How do you tell a N/A SOHC head from a turbo one?
Posted: Fri Feb 04, 2005 8:14 am
by MrBishi
Recently swapped a jet valve starion head for non-jv one, but I don't know how to tell if it is a Starion head or not? Is there any difference between a starion, cordia, or 4G64 head?
Posted: Sun Feb 06, 2005 5:58 pm
by WidebodyWoody
Usually the bore of the cordia heads are smaller in diameter.
Posted: Sun Feb 06, 2005 6:18 pm
by Powerslave
As far as I know , the starion heads used jet valves , the L300's did not. The 4g62 heads have a different sized combustion chambers , and possibly different sized ports. 4G64 heads are the same as 4g63.
Posted: Sun Feb 06, 2005 6:19 pm
by Cookiemonster
A turbo head should have a 'T' cast into the back of it.
Posted: Sun Feb 06, 2005 10:44 pm
by mrb1
Powerslave wrote:As far as I know , the starion heads used jet valves , the L300's did not. The 4g62 heads have a different sized combustion chambers , and possibly different sized ports. 4G64 heads are the same as 4g63.
OZ Starions DID NOT have jet valves.
Posted: Mon Feb 07, 2005 9:35 am
by Glynn
are the L300 heads exactly the same as the oz starion heads? in strength? is the cam the same (i assume it wouldn't be) and is it only the efi L300 heads that are similiar or all models?
Posted: Mon Feb 07, 2005 10:18 am
by jrod82
mrb1 wrote:OZ Starions DID NOT have jet valves.
Did the UK starions have them? Pardon my ignorance, but what exactly are they, and why are they a good/bad thing to have?
Posted: Mon Feb 07, 2005 12:54 pm
by WidebodyWoody
My Jap spec 4G54 did. Does anyone have that link that tells you how to disable them without taking them out?