Rectangle port heads on 5.3?

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Jul 23, 2024 | 09:00 PM

#41

Paul.Kaos

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Joined: Jul 2024

Posts: 12

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oh christ y'all immediately turned this into a buzz motor discussion

if I wanted to rip RPMS no **** Id have scat make a flat plane crank for the northstar with full forged everything, tap it for the fatty head studs, and hang two scroll turbos or those Borgwarner DVTs from the 4-cyl silverado off it, lol

poor man's 2025 zr1 motor

trying to go all revzilla with pushrod rockerarm heads is excruciatingly silly youre gonna need a valvetrain from NASA

I JUST WANT ALL THE FEET POUNDS AT 1KRPMS

Jul 23, 2024 | 09:04 PM

#42

Paul.Kaos

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Joined: Jul 2024

Posts: 12

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who wants to know the biggest difference between the SBC and the LS?

SBC are all more over square.

LS engines consistently arrive at the same displacement as their SBC counterparts with less bore and more stroke...

Jul 23, 2024 | 09:50 PM

#43

Kfxguy

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From: Louisiana

Quote:

Originally Posted by Paul.Kaos

I learned by accident that a smaller, lighter valve spring package with adequate seat and open pressure will easily out rev a larger valve spring with not much more (but adequate or recommended pressure). I once accidentally built 7800 rpm 383 when I was in my early 20’s back when LS was just starting out. That thing would have revved higher but I set the limiter at 7800. The cam was the ole comp 306 hyd roller (230/244 @ .050) with solid roller lifters on it. That thing accidentally made 447 at the tires through a slipping 700r4. It sounded nasty turning that kind of rpm. Ever since, I’ve preferred higher rpm setups.