Dave said the e street head springs are compatable with hyd roller cams. They are available for popular v8 engines.
Aluminum Sbc Heads
E street heads with roller cam. The limitations are the 550 lift and 5500 rpm. The e street heads are not smog legal as the performer heads are. A guy i know is thinking about going to a mild hydraulic roller cam for his chevy 350 with edelbrock e street heads but edelbrock says the heads are not suitable for use with roller cams. 918 7 the e street heads were torqued in. Edelbrock e street aluminum cylinder heads offer american made quality and affordable performance. Apparently these limits have no margin of error.
When i asked edelbrock if thats because of spring pressure heres the response i received. The e street cylinder heads have never been condoned by edelbrock to change the springs for a hydraulic roller another reason is the valves in the e street heads are a little heavier than the performer valves and the valve seats are different also so its not just as easy to change the valves springs more involved then just springs. These packages use performer intake manifolds and camshafts but feature our e street cylinder heads. Performer power packages idle to 5500 rpm. The e street 185 heads featured 185cc intake ports a 202160 valve combination and a modern 64cc combustion chamber design to maximize performance. Way too low a spring rate.
Pressure needs to come up a lot faster than that for an aggressive hydro roller like the xr series. The e street heads have 146 diameter springs with 120 on the seat which is in the ballpark for a street hydro roller but you have to get them to almost 580 lift before they get over 300 pressure. E street cylinder heads feature as cast ports and are designed for entry level street performance applications operating in the idle to 5500 rpm range. At press time summit racings nonsale price for a pair of fully assembled e street heads for a small chevy was 94995 and the. E street heads are designed for high performance street applications with hydraulic flat tappet camshafts and feature larger than stock intake and exhaust ports to improve engine efficiency. The seat pressure is 125 max lift pressure 325 and installed height is 175.
Gallery of E Street Heads With Roller Cam
