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Location:
eastern suburbs, melbourne
Registered:
March 2005
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4age head swap: big port -> small port
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Sun, 28 August 2005 11:44
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i own a ae82 with a 4age and on sat i got the terrible news that my big port (86kw) head is cracked. i called up toyospares and they said its $240 for another head, and that the big port, small port and 20V are all the same price.
i know the 20v wont fit cos of the pistons(mine 4 grooves instead of 5).
what i want to know is, if a small port(100kw) head will simply bolt straight onto my block.
will i need another ecu? if so will a after market ecu or piggy back chip do the job? and which one you guys recommend.
will i need to get a different wireing loom?
thanks.
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I supported Toymods
Location:
Sydney
Registered:
May 2002
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 11:50
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imho its not worth it. it has smaller duration cams.
but it should go plug and play it is still the same engine minus tvis.
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Location:
Campbelltown
Registered:
September 2004
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 12:19
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i got a bigport head if u wanna buy it off me
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Location:
eastern suburbs, melbourne
Registered:
March 2005
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 13:00
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so does the small port have a MAP semsor or an AFM?
and if it doesnt have TVIS do i need a new intake manifold?
what exactly do i need to change to make it run apart from the head?
manzy: i am after a small port(the 100kw one) head.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 13:06
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| SW20R wrote on Sun, 28 August 2005 21:50 |
imho its not worth it. it has smaller duration cams.
but it should go plug and play it is still the same engine minus tvis.
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it has smaller ports, higher port velocity and better midrange... i fail to see the problem with that 
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Location:
Melbourne
Registered:
May 2002
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 13:57
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Couldn't he use his existing bigport cams with the smallport head?
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Location:
sydney
Registered:
June 2005
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 14:03
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| fOOZ86 wrote on Sun, 28 August 2005 23:57 |
Couldn't he use his existing bigport cams with the smallport head?
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yeh you can they are slighty better.
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Banned by his request
Location:
moved to tamworth
Registered:
July 2002
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Re: 4age head swap: big port -> small port
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Sun, 28 August 2005 21:48
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fine to use the small port head as they are better atmo than the big port.just block of the oil return turn at the back of the head.you will gain a bit of power with the small port head.
mick
p.s if you dont know what your talking about dont answer in the tech section.lol makes it very confussing for people when there is right answers and some idiots opinion that is worthless.like the first answer.
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Location:
eastern suburbs, melbourne
Registered:
March 2005
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Location:
eastern suburbs, melbourne
Registered:
March 2005
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Re: 4age head swap: big port -> small port
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Mon, 29 August 2005 03:22
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ok. i have just oreder a 20v 4age. cant wait.
it cost me 1900 with a gear box.
the install should cost about 500.
thanks for the info guys.
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