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Gains from a 3.9L head 

 

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 Post subject: Gains from a 3.9L head
Posted: Thu Jul 12, 2007 10:13 pm 
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What gains if any would you get from onto a putting a 3.9l head ( giving the motor a higher compression ) onto a 4.0L tickford motor. Also what would be involved and also would you have to change the octane rating in the fuel.??

 

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Posted: Thu Jul 12, 2007 11:40 pm 
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The gains in comp would be offset by the worse flow, there is a reason they dumped the swirl ridge.
Plus the tickford head has a larger exhaust valve, the 3.9 doesnt.
93DT head is just better.
Its just generally a bad idea.

 

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Posted: Fri Jul 13, 2007 12:25 pm 
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You are much better off shaving your head to increase the compression and getting a cam as the 93dt is a good head. the 3.9 head is a peice of s**t.

 

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Posted: Fri Jul 13, 2007 7:45 pm 
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ok sounds like i aint doing that haha , now ill just ask around bout prices on shaving some thou of my head. thanx guys

 

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Posted: Fri Jul 13, 2007 9:50 pm 
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if you take the head to a shop you shouldnt pay any more then $100 to get it shaved.

 

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1994 ED Fairmont Champaign Gold - AU Series II Intech 4.0L - EL EFI - Thermo Fans - 4.11 LSD - Pacemaker 4480 Into Custom 3" Exhaust - Shift Kit
In Progress: EL 4 Speed Auto- 3000 STALL - To be fitted
EF Tickford Race Spec Head Port- In the shop
Custom SureCam - Chiptorque

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