Started the Heads/Cam install today.
This is a discussion on Started the Heads/Cam install today. within the Internal Engine forums, part of the LSx Technical Help Section category; Originally Posted by 0rion with the stage 2.5's that I got 2.04 valves came with them. A valve upgrade is ...
04-23-2007, 09:29 PM #81
i hear what your saying. its a fairly exact science but i have a friend who did his and to make a long story short, he runs upper tens with a maigc stick 4 and an expensive tune. im not completely sold on the idea of doing it myself, and the more i read the more i realize just whats at stake. having the port angle right to (i guess?) increase the velocity of incoming air, or like you said, it will cause you to lose hp. im pretty novice in this respect with all the internal trials and trappings but i figure the easiest way to learn is to just do it. if i screw it up, atleast it wont be brand new parts and i can take knowledge from it and do it right the next time. how big are the exhaust valves in the truck heads? and what springs and rockers are you using. i assume they are the same ratio to the ls1?
04-23-2007, 09:37 PM #82
hey, I'm all for just diving in and learning as you go. The problem with heads is being able to check your work. I suppose if you know someone that can flow test them for you so you can see if they're better or worse would be nice to have. I would have to look up the valve sizes, I forget them off the top of my head. I'm using patriot gold dual springs with my stock rockers.
04-23-2007, 09:48 PM #83
04-24-2007, 02:51 AM #84
- Join Date
- Aug 2005
- Cape Coral, FL
- 99 Trans Am & 01 CBR 929
my roommate has an 05 gto with L92 heads waiting to be installed but as of right now his 243 heads are spoken for if anything falls through then ill post up on here, i know he is gunna want to sell them
Sorry I didnt realize that the 5.3s had smaller valves, I just know they are a good head to go with once they are worked over.
04-24-2007, 04:23 AM #85
just putting a set of 5.3L stock heads on a 5.7L LS1 motor will not achieve the same results.
just save up the money for a good set of heads. or, maybe, find someone selling their ported heads.
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