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AU VCT Question 

 

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 Post subject: AU VCT Question
Posted: Mon Mar 03, 2008 6:43 pm 
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hiho, just wondering what would be involved with getting the AU VCT installed on my EA? (mpfi). the original 3.9 head has been ported and rebuilt with EL valve\rocker gear and cam profiled for bottom end torque. what would i need to make it vct? im guessing it just needs the electronic AU camgear?, would i need to use the AU cam?

ECU isnt an issue as ill probably just make up an isolated circuit to adjust cam timing configurable/vairable to the engines RPM, mainly wanting to keep the same bottom end torque with a bit more power up top. any ideas welcome :)

 

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Posted: Mon Mar 03, 2008 7:16 pm 
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it wont fint on the au head
the cam journals are teh wrong size

 

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Posted: Mon Mar 03, 2008 7:27 pm 
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anyone know what the difference in low end torque is with the vct??

 

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Posted: Mon Mar 03, 2008 7:45 pm 
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gogetta wrote:
anyone know what the difference in low end torque is with the vct??
After doing my conversion I can now putter around in 5th at 1000rpm with the gearbox growlings its head off, there is significant and real gains in low down torque and much better high end as well.

 

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 Post subject: Re: AU VCT Question
Posted: Mon Mar 03, 2008 7:48 pm 
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Redford wrote:
hiho, just wondering what would be involved with getting the AU VCT installed on my EA? (mpfi). the original 3.9 head has been ported and rebuilt with EL valve\rocker gear and cam profiled for bottom end torque. what would i need to make it vct? im guessing it just needs the electronic AU camgear?, would i need to use the AU cam?

ECU isnt an issue as ill probably just make up an isolated circuit to adjust cam timing configurable/vairable to the engines RPM, mainly wanting to keep the same bottom end torque with a bit more power up top. any ideas welcome :)
You will need to replace the head, rocker cover, rocker gear, PS pump bracket, serp belt, additional belt idler and cam all with VCT specific parts.

 

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Posted: Mon Mar 03, 2008 8:28 pm 
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thanks for the info, is the serpentine belt needed to drive the cam sprocket? i thought the vct sohc was chain driven.
i have no idea when it comes to the au heads :?

 

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Posted: Mon Mar 03, 2008 8:55 pm 
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Redford wrote:
thanks for the info, is the serpentine belt needed to drive the cam sprocket? i thought the vct sohc was chain driven.
i have no idea when it comes to the au heads :?
No the cam is still chain driven but the belt is longer on VCT motors to go around the actuator hanging out the front of the head.

 

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