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Originally Posted by G.Maro.ZL1
His video is what inspired my build, I know it won’t be cheap but it’ll be a bit different than going SC. I’m looking more into Port injection than the DI kit as it is a pricey for what they want compared to how cheap a port setup is. It definitely isn’t an all at once build, totally will be over time
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I was going to comment that I bet you, like many, watched his stuff & got excited how cool it’d be.
Make no qualms, it’s an awesome build. Yet at the same time anyone not knowing the ins or outs of a pump gas turbo build would have next to zero understanding of the nuances that went into it. Little things that make a huge difference in a 416 strokes like that. Rod/stroke ratio, valve sizing, port flow rates & velocities, valve curtain & acceleration ramps, compressor & turbine side combination… the list goes on.
Someone might look at it & say “Hey, I could do that with a stock LT4 motor with more boost & fuel/octane.” Which is true, to a point, but it goes a lot deeper than that.
I’m not saying you can’t reach your goals. What I’m saying is it’s going to be a tad more complicated than slapping a dual 62mm kit on a stock LT4, even with port injection & making over 1K crank HP.
Quote:
Originally Posted by G.Maro.ZL1
I was thinking of just going with the 62mm as I want something faster spooling, and definitely want it to build boost around the 3k rpm range.
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That’s great, in theory, but the compressors need to be able to flow the air, efficiently, at the manifold pressure required to deliver enough air mass to make the power you desire.
Add: Turbine combination playes a larger part in boost response. Wheel size & design, turbine housing A/R & design, Center section bearing usage, & as well as the exhaust system itself.
It’s a system, through & through, each part relying on the other to do what it’s designed to do in a given application.