A stoker kit will increase torque considerably-50% to 70% depending on what other options are included. Our cams are specifically designed to give you the most lift possible at this critical area. The valve is at maximum lift for a very short time, making the mid-lift air flow much more important for making power. The reason is because the valve is in that area twice-once when the valve opens and once when it closes. 100” lift up to about 90% of maximum lift. Stock rocker arms can be used on all iron replacements heads but we suggest that you upgrade to either our stainless steel or aluminum rockers for more accurate ratios and improved performance.Ĭylinder head air flow is most important from about. Edelbrock has a very nice aluminum head that we can CNC port to outflow any other head. We work with 3 of these manufacturers, so we can supply new heads for everything from a budget rebuild to a ported racing version with oversized valves. This problem is so common that at least 4 aftermarket manufacturers supply new cast iron heads for them. HeadsOne of the first things you will learn, from reading this or the hard way, is that OEM magnum heads are cracked-or at least 95% of them are. These act more like a solid lifter, produce more power and have a mechanical sound. P/N HUG 5006 are stock replacement style, and our high performance version, P/N HUG 5007. However, we see lifters with over about 50K miles as noisier (tick-tick-tick) than new lifters on the same cam. In other words, if the roller rolls smooth and the lifter pumps up. Lifters Hydraulic roller lifters can be re-used if they are in good condition.The tighter LSA will cause the engine to produce even more power and torque, and have more aggressive idle.īut it also lowers the vacuum enough to confuse the E.C.U., therefore, the SCT tuner is necessary to re-program the ECU to operate properly with this lower vacuum. These cams have tighter lobe separation angles (L.S.A.). We have a special line of cams for applications using an SCT tuner. With some of the larger cams, you may need double springs and the heads will need to be machined to accept them. The bottom line is that the cam installation procedure is the same. At this point, you may just install one of our smallest cams (P/N HUGHER9703AL-114 for 5.2 or HUGHER0814AL-114 for your 5.9) for a big torque boost in your stock engine, or you may build a high performance or a stroker needing a lot bigger or even a custom cam. Camshaft At last, we can put in the camshaft.Generally, tuners such as SCT ( P/N SCT3200, A & B ) with 2 custom tunes are required at this level. This level will involve more work, some dedicated tools and greater mechanical skill. Care must be taken on the tuning side as well but, as always, Hughes can help guide gear-heads in the proper direction: Swapping engine internals is the last step in maximizing power and some mechanical know-how is a must. The third and final installment of the Hughes Engines Magnum manifesto isn’t for the faint of heart or light of foot.
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