railroad
Well-known member
I have a new set of the Edelbrock E-Street heads. Recently some problems have been reported with valve spring breakage. Obviously, these are with the heads that are being used. Mine are still on the shelf. Edelbrock advertises these heads as bolt on performance heads for 289, 302 and 351 engines. The instructions and advertising do state that they are for 550 lift or less, 5500 max rpm. By these limitations, you can surmize they are not high performance, but for street use. After reading about the problems on the Corral web site, I contacted Edelbrock tech. Once we confirmed the valve spring breakage did occur, I was informed it was due to the owner running a hyd roller lifter with the heads. With ads and instructions in my hand, I read them to the tech. His comment was that Edelbrock meant the heads had to be run with hyd flat tappet only. NO WHERE in the advertisements or the instuctions are there any limitations on what lifters to use. I asked if they had an upgraded spring that could be used, NO. I asked him, where that left me. I was advised, I could machine out the spring seat, install larger springs and retainers, like that is an option. I told him, I could have bought AFR and would not have to do that. He did not want to take my name and number in the event Edelbrock wants to correct the bad parts put on the heads. After almost insisting he did take the information. We all know what that was worth. Be advised this condition exist and how it is being handled. So far my only option is the LSX springs as listed on the Corral thread, about $250.
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