I have looked all over and can not find the cam specs for the factory mustang gts and cobras in the later 80's to early 90's i want these specs to compare with the cam I am thinking about getting. However I can not find them does any one know where i can find them or does anyone know what they are?
I think if you go to comp cams web site and go into their online catalog you should be able to find stock replacement cams with their specs on there.
Hey David here are the cam spec's I think your looking for. I got them from "the official Ford Mustang 5.0 Technicail Reference and Performance Handbook" P.N. E5ZE-AA 266 In/ 266 Ex dur and .444 In/ .444 Ex lift intake timing BTDC 17 ABDC 69 Ex timing BBDC 67 ATDC 19 Lobe centers In 115 Ex 115 P.N. E8ZE-CA 276 In/ 266 Ex dur and .444 In/ .444 Ex lift In timing BTDC 20 ABDC 76 Ex timing BBDC 67 ATDC 19 Lobe centers In 116 Ex 115 P.N. F1ZE-AA/F4ZE-DA 276 In/ 266 EX dur and .444 In/ .444 Ex lift In timing BTDC 20 ABDC 76 Ex timing BBDC 67 ATDC 19 Lobe centers In 116 Ex 115 Different grade steel is the reason for the change in part numbers.
That just about does it. That atleast gave some idea of what to compare the cam I want to use with. Thanks alot.
David, one of the major parameters you may not recognize much about is the 115/116 lobe centers. These lobe centers keep the intake /exhaust valve event to a minimum of overlap to keep the intake vacuum high for a smoothe idle, better emmisions and for use in the Speed Density controlled engines due to the use of a Map sensor that signals the computer what the engine load should be via vacuum level according to the factory computer model for the engine design and application. Most performance cams will have lobe centers from 112 downward to as low as 106 depending on application. These lobe centers make the idle quite noticably rougher and have a negitive effect on low rpm torque favoring a higher rpm power band. These wide lobe center cams make good street blower cams even as stock by keeping the cylinder pressure higher (less blow through at everlap) before the exhaust valve opens and blow down ocurrs.
Yes that is exactly what I have heard. The cam I want to go with has a 110 lobe seperation angle. It has a duration @.050 valve lift of 215 intake 215 exhaust. The advertised duration is 270 intake 270 exhaust. The lift is .533, which offers better torque. I am going to probably go with the gt-40 1.84/1.55 valves on my gasket matched '75 351w heads for better low end torque. These heads like a lot of valve lift because of their bigger ports (2.00" X 1.165") so I believe this cam will work great with these heads. I found out these heads are perfect for later model 302s. All the coolant passages and ports match up. The intake manifold bolts right to it with out that extra bolt u get with the earlier 351w heads. The combustion chambers are the same size as the earlier 351ws (which are smaller than the later model gt-40 heads). Although the stock valves might be the smaller 1.76/1.45, that is pretty easy to change. Besides I am getting hardened valve seats installed anyway.
