Edelbrock Alumn 4.0L Head
#1
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Year: 1998
Engine: 4.0L 162,000
Edelbrock Alumn 4.0L Head
Finally, this is for real.
Need a volunteer, you get the head for free.
http://www.edelbrock.com/automotive/misc/test-vehicles/
Need a volunteer, you get the head for free.
http://www.edelbrock.com/automotive/misc/test-vehicles/
#5
Head on 2006 should be the TUPY 0331... Meaning to swap one onto an earlier 4.0 would require an exhaust system change to the 50 state 2000 cast split manifolds.
When I owned a 2006 TJ I saw no real difference in the head from my 2000 XJ. The block and accessories were a whole nother matter. But we are just talking cylinder heads here.
When I owned a 2006 TJ I saw no real difference in the head from my 2000 XJ. The block and accessories were a whole nother matter. But we are just talking cylinder heads here.
Last edited by Rockfrog; 09-17-2014 at 10:56 PM.
#7
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Year: 1998
Engine: 4.0L 162,000
Just thinking what makes the most sense-
Aluminum, thicker deck, bigger valves, better combustion chamber shape, better intake and exhaust ports, slight 0.5 bump in CR. Optional conical valve springs.
Use stock intake, exhaust, rockers and pushrods.
Add +20HP out of the box.
Price? guess $1000-1200. Less $, like $700 would be great and sell a ton.
Only concern is alumn head/iron block and heat/expansion/cooling and reliability and head gasket problems.
Iron head/iron block is 200,000+ mile reliable, alumn head/alumn block is also good.
Adding 1.7:1 roller rockers and 0.043" MLS head gasket (vs 0.055" stock) to improve squish and compression ratio, could add another 15-20HP.
ECU SCT tune, another 10-15hp.
BUT all this gain might only be above 3000 rpm. Not exactly best Jeep power band. However, all the above would work great with a supercharger.
Aluminum, thicker deck, bigger valves, better combustion chamber shape, better intake and exhaust ports, slight 0.5 bump in CR. Optional conical valve springs.
Use stock intake, exhaust, rockers and pushrods.
Add +20HP out of the box.
Price? guess $1000-1200. Less $, like $700 would be great and sell a ton.
Only concern is alumn head/iron block and heat/expansion/cooling and reliability and head gasket problems.
Iron head/iron block is 200,000+ mile reliable, alumn head/alumn block is also good.
Adding 1.7:1 roller rockers and 0.043" MLS head gasket (vs 0.055" stock) to improve squish and compression ratio, could add another 15-20HP.
ECU SCT tune, another 10-15hp.
BUT all this gain might only be above 3000 rpm. Not exactly best Jeep power band. However, all the above would work great with a supercharger.
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