In the article they felt the big hinderance of the E Street heads was the single angle valve job. The article I believe went on to say with a good valve job the E Streets might have been tied for first place.Thats surprising and yet not really on the E Street heads. I could have saved on both the heads and pistons! 60cc combustion chamber being the main downside to the E Street's.
I think i've seen somebody saying that the E-Street are basically the same casting as the more expensive Edelbrock heads, just mounted with cheaper parts.Thats surprising and yet not really on the E Street heads.
In tests of higher level heads I've seen It's usually AFR, TW and Edelbrock that comes in as 1,2 3 on power. The TW heads are nearly always the most bang for the buck in tests.The article I believe went on to say with a good valve job the E Streets might have been tied for first place.
I have that article (and many others from car craft) The E-streets did well followed closely by the Gt-40X. The twisted wedge are truly in another league and that was the old ones, not the new 11Rs. I say this as this was a mild build and on something with more cam the twisted wedges would have pulled away even more. However, no knock on the e-streets as they are a good head for someone using a flat tappet hydraulic and a stock stroke. They are the same as the performers with worse valve springs. Edelbrock now offers the performers in a 190 cc version and it would be interesting to see some flow numbers on those.Don't know anything about them. There are a few shops out there that buy empty castings, do machining and fit them with good parts. A head like this would be fine. I'd check further with your engine guy. Then there are the companies just reselling of a mass produced Chinese head with poor quality parts. On eBay there's a company called Skip White. I have no personal experience with them. They do post what brand parts they use which are well know quality items, no junk. However like anything quality costs and these heads are pretty much in the range of name brand. These heads do get very good reviews from those who have bought them. If I we're in the market for a budget aluminum head I'd be buying the Edelbrock E Street.
Here's a good article. The Edelbrock E Street heads came in at 3rd place but they were very close in performance to the 1st place Trick Flow heads at less money. No matter what head you use the limiting factors are going to be the intake and exhaust.
That's a good head with that combustion chamber size for a stock stroke. My Chinese heads actually looked good but the valve springs weren't good for anything but a mild hydraulic. I would have been much better off either buying them bare since I replaced everything but the valves anyways or better yet buying an AFR or Twisted Wedge. Live and learn.I bought the TW 11R 170 with 53cc chamber. The are very nicely built. And they come well packaged and protected. I have heard that some of the cheaper Chinese heads come loosely packaged and dinged up.
For higher rpms the 289 or any 28oz balanced assembly is better. For an all out build the block is stronger too with a tad more meat.I intend to keep a 289 in my car but just build a little more modern version. With the heads and TF stage 1 cam I have a good base to.start with. My engine runs pretty good as is but it's rebuild history is unknown to me. All I really know is that it's 68 289 bored .040 over. Cylinders look good with no lip, and visible hash marks. But there is a vibration that increases and decreases with rpm not mph, and that makes me think something is out of balance. I have a 289 crank and rods lined up, I am saving for a new block, and pistons. Then will have the block decked, lined honed, and the cylinders torque plate honed as well as getting the rotating assembly balanced. Will top it all off with EFI. I know a lot if guys advocate for the gt40 from the explorer, and that would be easy. But something about a 289 and the prospect of 7000 rpms is just calling my name. Lol