Has anyone taken a look at Edelbrock's performance head for the 4.0L?
http://www.edelbrock.com/automotive/mc/ ... jeep.shtml
See the dyno chart under the "Application" banner...[/img]
Edelbrock 4.0L Performance Head
Moderator: TJDave
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Rottwheeler
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- Joined: Mon Jan 18, 2010 11:58 am
- Location: Kennewick, WA
Edelbrock 4.0L Performance Head
Rottwheeler
White 13' JKU Rubicon, 3.5" Rubicon Express Super Flex suspension, 3:73s, 35" Nittos on American Racing ATX black faux bead locks... for now.
White 13' JKU Rubicon, 3.5" Rubicon Express Super Flex suspension, 3:73s, 35" Nittos on American Racing ATX black faux bead locks... for now.
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Wrench
- Peak Putters Member
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- Joined: Sat May 30, 2009 7:23 am
- Location: in a van down by the river
That's been out for quite a while, hasnt it?
If I remember right, reviews were not exciting enough to justify the price tag.
Personally, I think the stock ports are too large for our application and leave a lot of torque potential on the table (that our Jeeps NEED). In the effort to keep this head 50-state legal, they didnt improve the port profile much from stock. I believe it IS an improvement, though, and has way more potential than the stock cast iron head. Especially on a large displacement stroker.
Over the last 15 years, production ports have reduced in size quite a bit and the profiles have changed on the really high-end stuff. Those that kept their port sizes close to the same increased their redline by many thousand RPM (requiring more flow), and in some cases, reduced the valve sizes.
If I remember right, reviews were not exciting enough to justify the price tag.
Personally, I think the stock ports are too large for our application and leave a lot of torque potential on the table (that our Jeeps NEED). In the effort to keep this head 50-state legal, they didnt improve the port profile much from stock. I believe it IS an improvement, though, and has way more potential than the stock cast iron head. Especially on a large displacement stroker.
Over the last 15 years, production ports have reduced in size quite a bit and the profiles have changed on the really high-end stuff. Those that kept their port sizes close to the same increased their redline by many thousand RPM (requiring more flow), and in some cases, reduced the valve sizes.
Paul
'84 XJ, '19JL
'84 XJ, '19JL
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