building a 351w
New User
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The cam is .541 lift on both ex. and intake I think don't have the information in front of me duration is 238. The compresion is 9.5 to 1 or so. Yes I am running headers, and a 650 edelbrock carb. The heads are the ones off the crown vic. They are not that bad, they have large valves and are shallow chambered at 64cc. I was told by an engine builder that to get a noticeable better head I would need to go with alum. one. Thanks.
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My desktop dyno shows about 375HP and 350 torque. I think Paul has a better Dyno than me. Try running this thread in the smallblock category. You may get more response there.
I just ran it again with a different cam profile and got around 420 for both. That's the problem with my dyno, I need to download a cam file to get more reliable figures. The cam part of it is really funky.
I just ran it again with a different cam profile and got around 420 for both. That's the problem with my dyno, I need to download a cam file to get more reliable figures. The cam part of it is really funky.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
There's no chance at all.. under any circumstances.. that the CV heads would make more than 300hp.. even with full porting. Every head Ford made including the smog era heads flow more air then the E6 heads, go find some GT40 or GT40p heads from a '97 to 2k Explorer/Mountaineer and you'll have a fighting chance of making 350hp.
That cam is also a complete mismatch without way... way better heads too, and I'm talking way better than the GT40 heads.
That cam is also a complete mismatch without way... way better heads too, and I'm talking way better than the GT40 heads.
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From: Mass.
yeah, conanski hit this one right on. Those heads are restrictive on a 302. gt40 or gt40p heads can probably get you near your goal.
Ive personally had those E6 crown vic heads in my hands, up next to some e7s, and they are junk.
And like conanski said, to take complete advantage of that cam, your going to need something like a dart iron eagle or afr 185 cylinder head to realize anywhere near its full potential.
Ive personally had those E6 crown vic heads in my hands, up next to some e7s, and they are junk.
And like conanski said, to take complete advantage of that cam, your going to need something like a dart iron eagle or afr 185 cylinder head to realize anywhere near its full potential.
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
The GT40 heads were found on Cobra Mustangs and Explorer/Mountaineer 5.0's from 1996 - 2k and they're a definite upgrade over the E7s.
Below is a flow chart for many of the more popular heads, to get into the 400hp range you need heads that flow as well as the AFR185, and stock E7's will produce about 280hp, that should give you an idea where the others fall.
Below is a flow chart for many of the more popular heads, to get into the 400hp range you need heads that flow as well as the AFR185, and stock E7's will produce about 280hp, that should give you an idea where the others fall.
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I notice the i/e ratio for the gt40 is higher than the 40p but the %over stock is higher for the 40p. Which one would be a better fit. I am putting this in a 93 f-150 4x4 with a manual tran.
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FTE Legend
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The GT40 is a direct replacement with no fit issues so it's a little easier to use, while the P version requires longer plugs, plug wires with 90 deg boots, and maybe some clearancing around headers.. all due to the spark plug angle. Both use stock valtrain but the P version will also bump compression higher. It the bottom end is stock or uses stock pistons valve clearance should be checked.
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