We've had the foundry and engineers look this over and the problem is not one of design, but how the O-rings are seated.
With the extra bolts along the outside of the head, there is more clamping force on the outside. Because of this, if the o-rings aren't seated completely or correctly, the extra force will pull down with the o-rings being a fulcrum point and cause this condition.
After seeing this picture, I never would have guessed the foundry expert engineers would come to this conclusion.
Bazman wrote:I guess it is for reasons like this that companies like Dart do well with the pro racers. I brought Indy Cylinder heads into my country back in the 90's and promoted them. Back then they were good quality and records got broken not parts. Now I'd not go near them (like a number of other big names).
The list of block and head makers that make AND MAINTAIN quality control and design a top priority is short in my view.
Ok you pro race engine builders - what names would you add to a shortlist of companies that you can vouch for having consistently good design and quality castings?
I'm not a engine builder but I'll start the list - talking as cast/billet not finished:
1 - Dart - not necessarily the very best always, but consistently very good and will almost always do the job
1928rutherford wrote:so I hace a set of these heads that I will probably never use. I have a pretty good business up here in Canada and have deal"t with many manufactures and most seam to want to stand behind their product. I have never asked for anything from World other than maybe they should admit that I was trying to do something that their product was not designed to do. I find it odd that no one knows of any one that has defended Worlds reputation by sayin that they use these heads in heavily boosted applications with no problems.