Head decision for 5.3 NA build.

Reply Subscribe

Thread Tools

Search this Thread

Jan 13, 2018 | 01:13 AM

#41

chrisfrost

TECH Fanatic

iTrader: (8)

Joined: Nov 2009

Posts: 1,112

Likes: 16

From: phx the cactus patch

just an fyi stock 5.3 pistons are dished I believe 9cc's and the 4.8 pistons are flat-tops that have the same compression height and pin diameter and are sold in stock, .010, .020, .030, and .040" oversize

Jul 18, 2022 | 01:01 PM

#42

Ls BO 53

Registered User

Joined: Jul 2022

Posts: 2

Likes: 0

Quote:

Originally Posted by 76firechicken

absolutely

I'm also considering a 4.00 crank in the build so I want to make sure these will flow enough in ported form.

I'd like 4-500 rwhp. I think that will be enough power to keep me happy. I'd probably be happy with just a cam swap but why not go big.

I really like 243 heads milled.and ported and then you pick a cam and typical Bolton should out you just shy of 400 whp. Unless your set on staying NA you could pick up a good complete turbo kit on budgetbuildinc.com including fuel system foe less than what a stroker kit will run you and you avoid opening up your engine. One should always avoid opening up the engine if not a must. For less money you.could have a 700whp build. Or there's a vortech v3si centrifugal blower foe about 3k