E7TE or C80E Which heads are better?
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From: Williamson, NY
Originally Posted by pcmenten
The E7 is a truck head and another open-chamber design. As mentioned, hardened seats in that head. Nothing special, but I'd use that one. I have some E6 heads that I think would be perfect on a 351; bigger chambers but a closed chamber design; good quench/squish and a reasonable compression ratio.
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I would not use the E6 head, the valves are shrouded real bad. I ported a set that just went into the trash after I worked one of the chambers trying to un-shroud the valves. I think I was trying to get like 3/32 or 3/16 around the valve can't remember, but I would think on a 351 it would lay down fast with a pair of E6's I know the 5.0 that had them did, all done at 4000rpms in a ltd I had. Ran that motor in my truck for a while never liked it.
There is a reason why they only made them 1 year. Boat anchor.....
There is a reason why they only made them 1 year. Boat anchor.....
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Originally Posted by cujo8
I bought a set of E7TE heads for my 77 302 off eBay and the guy told me they were off a mustang GT, so if the E7's were only truck heads then the guy on eBay was feeding me a line. After all he also told me these were ready to bolt on, but they came with 4 broken off bolts in them and he hacked up one of the bolt holes trying to remove one of the broken intake bolts.
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The air flow of the various regular 289, 302, and 5.0, and later model 5.8 are all with in a few cfm's on the flow bench. That's why I can safely report that there's no "significant difference" in airflow. This is still true of the exaust ports, regardless of the smog bumps. There may be a small amount of variance, but it's not significant.
351w 4 barrel heads from 69 do have slightly more flow potential.
Nonetheless, you will not find significant improvements in flow potential, until you enccounter GT40, or GT40P heads, among factory SBF heads.
This isn't to say that a talented hand can't make substantial improvements by porting any of these heads.
This brings me to my opinion of E6SE heads. I think these heads are better than most people think. They arn't much for high RPM applications, or for big cubes, but the swirl combustion chambers are more effcient at converting mechanical energy from chemical energy, are much less prone to detonation ( even with a lot of spark advance), get significantly better fuel milege (on lower octane), and just get a more efficient burn, overall. A set of ported E6's may be fine in a mild, lower rpm, application.
351w 4 barrel heads from 69 do have slightly more flow potential.
Nonetheless, you will not find significant improvements in flow potential, until you enccounter GT40, or GT40P heads, among factory SBF heads.
This isn't to say that a talented hand can't make substantial improvements by porting any of these heads.
This brings me to my opinion of E6SE heads. I think these heads are better than most people think. They arn't much for high RPM applications, or for big cubes, but the swirl combustion chambers are more effcient at converting mechanical energy from chemical energy, are much less prone to detonation ( even with a lot of spark advance), get significantly better fuel milege (on lower octane), and just get a more efficient burn, overall. A set of ported E6's may be fine in a mild, lower rpm, application.
Last edited by P51D Mustang; Dec 25, 2006 at 09:02 AM.
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From: Boise, Idaho
Originally Posted by P51D Mustang
(re: E6SE heads) I think these heads are better than most people think. They arn't much for high RPM applications, or for big cubes, but the swirl combustion chambers are more effcient at converting mechanical energy from chemical energy, are much less prone to detonation ( even with a lot of spark advance), get significantly better fuel milege (on lower octane), and just get a more efficient burn, overall. A set of ported E6's may be fine in a mild, lower rpm, application.
Some day I'll get around to swapping a pair of F7's onto the Mustang's HO, but I'll be saving the E6's for a 351w block I have in the garage.
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found this
but I still think on a 351W you would be better off with some E7's
http://www.diyporting.com/E6TE.html
but I still think on a 351W you would be better off with some E7's
http://www.diyporting.com/E6TE.html
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From: Ottawa, Ontario
Originally Posted by P51D Mustang
This brings me to my opinion of E6SE heads. I think these heads are better than most people think. They arn't much for high RPM applications, or for big cubes, but the swirl combustion chambers are more effcient at converting mechanical energy from chemical energy, are much less prone to detonation ( even with a lot of spark advance), get significantly better fuel milege (on lower octane), and just get a more efficient burn, overall. A set of ported E6's may be fine in a mild, lower rpm, application.
"get significantly better fuel milege (on lower octane) Check. I have seen 17-18mpg.
"A set of ported E6's may be fine in a mild, lower rpm, application" Check.. I rarely go to 4500rpm. Rarely neeed to, but the motor still pulls hard all the way up there if I floor it.
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From: Boise, Idaho
Steve, Thanks for the link to the page about the E6TE head. I had never even heard of this head. I had been talking about the E6SE head. As they say, it's a bad day when you don't learn something and I learned something today.
If I were to choose between the E6TE head and the E7TE heads, I'd pick the E6TE head in a heartbeat; closed chamber. Zero deck the pistons and give the valves a quality valve job and you're good to go. I understand your point about peak horsepower, but I seldom buzz my engines that high. I'll take the torque, thanks.
Great link.
If I were to choose between the E6TE head and the E7TE heads, I'd pick the E6TE head in a heartbeat; closed chamber. Zero deck the pistons and give the valves a quality valve job and you're good to go. I understand your point about peak horsepower, but I seldom buzz my engines that high. I'll take the torque, thanks.
Great link.
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Originally Posted by HemiEater
found this
but I still think on a 351W you would be better off with some E7's
http://www.diyporting.com/E6TE.html
but I still think on a 351W you would be better off with some E7's
http://www.diyporting.com/E6TE.html
This is were the Aluminum GT40 heads and the TFS Twisted Wedge heads...ect..., come to the table, because they have both high swirl and higher airflow.
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