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Tag Archives: Speed Secrets

Speed Secrets: Control Your Boost – Cam Swap vs. Pulley Swap!

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Everyone knows that it is very simple to make more power with more boost but how does less boost produce more horsepower? Well, the answer is very logical and actually kind of a simple notion in and of itself. You see, boost is essentially a measurement of restriction and by increasing the flow of an engine you cannot only increase ... Read More »

Speed Secrets: More Power with LESS Boost?

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Everyone wants more power and it seems like there is a common misconception that the best way to go about getting more out of a forced induction application is to increase the boost. While this does the job and is fairly easy to do, the best way by far is to actually decrease the boost. To elaborate on this concept, ... Read More »

Speed Secrets: FAST LSXR 102mm Intake Test!

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How much power are intake manifolds really worth is a commonly asked question. To try his hand at answering this question, Richard Holdener with Speed Secrets teams up with Comp Cams and Fast. The problem with this question is that even though it seems pretty straight forward, it’s really not. The reality is that the power gains from an intake ... Read More »

Speed Secrets: Less Valve Lash = More Horsepower?

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Speed Secrets with Richard Holdener has always had an unrelenting focus on the big parts of engine building, like camshafts, cylinder heads, intake manifold, and so on. However, there is more to achieving the right setup than just choosing the correct big ticket items. In an effort to present the affects the little details have on an engine, Richard turns ... Read More »

Speed Secrets: Getting 500-Horsepower Out of a Small Block Ford

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When thinking of building a high horsepower Small Block Ford, the first modifications that come to mind are Induction system and head flow. While those simple modifications will get you a long ways, there are two key elements that will make hitting your target horsepower rating easier – Displacement and camshaft. One rule in making real power that has never ... Read More »

Speed Secrets: 408 Fast Intake Test

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Single plane carbureted intakes are notorious for making big peak power, and the Fast LSXR intake is the best of the best when it comes to LS EFI applications, but how do the two compare? To find out, on an episode of Speed Secrets Richard Holdener and the guys from Fast stage an intake shoot out. For a test engine, ... Read More »

Speed Secrets: Is a Camshaft Swap Necessary for a Boosted Engine?

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The Xtreme Marine XM284HR camshaft with a .547 lift, 230/236 duration, and 112 LSA is an excellent camshaft for a ZZ-454 in a marine application, but how well would the cam do with boost? Richard Holdener with Speed Secrets teamed up with Comp Cams to put the combination to the test. This test was out of the norm in that ... Read More »

Speed Secrets: Zex Nitrous and Small Block Chevy Engines

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Whether from a turbo, blower, or nitrous, there is a lot to love about power adders. Especially when used in a Small Block designed specifically for them, like the SBC 383 Stroker from Blue Print Engines. It has everything you’d want for power adder applications, Including forged internals, low compression, and aluminum free flowing heads. Making the 383 that much ... Read More »

Speed Secrets: It’s Time to Juice the LS

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Typically, nitrous comes in two different configurations. For EFI applications there is the wet fogger system, where you combine nitrous and fuel in a single fogger nozzle and install it somewhere in the air intake system. Although, if you were looking for nitrous for a carbureted application, a perimeter plate type system would be the way to go. While both ... Read More »

Speed Secrets: Combining a Big Block Chevy with Nitrous Means Big Power

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As far as naturally aspirated power, it’s hard to beat a Stroker Big Block Chevy, especially one with a nice hearty camshaft from Comp Cams. The fun doesn’t have to stop there though. With a little throttle in a bottle, a healthy BBC can get real serious, real fast. To explore just how far a little nitrous can go when ... Read More »