Wow, once again I get surprised by how little I actually know. I honestly didn't know that dual plane intakes have no use on a efi motor. Man, I don't know ****.
And that's why I'm here posing these questions. The TEA stage two ported 5.3 heads flow to 320 @ .600, so that would be my ultimate determining factor. The heads support six liters of displacement up to 8k rpms with those numbers, according to the Wallace racing online calculator.
I'm not building a racecar, to tell the truth. It's a 1982 2wd S10. I wanted to see what the lowest displacement motor I could build with the longest OEM stroke available in the LS platform. I actually chose to build the smallest 4" crank LS possible, on purpose.
This will be my first time completely building an engine, as I'd you can't tell. So I chose to build it small. With a displacement handicap, as I learn more and develop more as a driver... If I outgrow what the 3.78 bore is capable of providing, then I will build a new, obviously larger, motor utilizing everything I have learned.
For now, given that the only 4" stroke kit for the 3.78" bore is all forged, and how easily boost can be added, even with the 10:1 compression ratio the wiseco pistons have, I am sure I could get more than enough power to kill myself in a 3000# truck, even out of a small bore six liter.
So I will probably be playing with this combination for a while. Hopefully I can get something half as respectable as yours in the next decade or so.
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