Edelbrock 4.0L Performance Head
Posted: Tue Apr 07, 2015 5:47 am
by Rottwheeler
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]
Posted: Tue Apr 07, 2015 6:14 am
by Wrench
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.