Time and time again I talk to people that are doing an LS Swap, or have an LS Powered late model car, who rattle off some parts they are going to upgrade to “make more power”. Headers, exhaust, cold air kits, and throttle bodies seem to be on everyone’s list and no matter what I say they always look at me funny when I tell them that a throttle body is a waste of time and money. Sure, there are times when a throttle body might be needed, on say a bigger engine that has been outfitted with a larger intake manifold. But in most stock style builds, including those under boost, there is no real need to increase the throttle body size. But before you tell me I’m full of it, check out the video below as proof.
When Speed Secrets’ Richard Holdener did the test, back to back, on the engine dyno, the results speak for themselves. Watch the video and let us know what you think. And feel free to tell us what other parts you’d like to see tested, because we can probably make it happen. There are tons of things we can test, and we’d love to do what makes you happy.
In this episode of Speed Secrets, we test whether installing a larger diameter throttle body than your intake port opening really gains power! This highlights the importance of matching modifications together to create the most benefit. Parts used: F.A.S.T. Big Mouth Throttle Body: (part #54103 and #54091) COMP Cams 54-469-11 LSr Camshaft F.A.S.T 65lb/hr Fuel Injectors (Part #30657-8)