5.3 stock bore...best heads available?
5.3 stock bore...best heads available? I have a stock bore 5.3 and looking for a set of heads to go on it. its a turbo engine on methanol. Seems like not alot of options for the small bore size. Whats the biggest valve sizes that will work? I'd like to go aftermarket casting to get the thicker deck, but i'm also curious whats the max hp made on stock castings.
WCCH sells a re-worked Edelbrock casting designed to work around the 4.8/5.3 bore.
Trick flow has GenX 205 heads designed to work specifically on that bore as well.
It sounds like your going all out with a turbo and methanol so you could probably step up to a larger head with larger valves. I don't think your going to be able to go past a 2.02 intake and a 1.600 exhaust valve with a 3.780 bore. Since your forced induction I don't think you will have to worry about valve shrouding and air stalling like an NA build would.
Trick flow has GenX 205 heads designed to work specifically on that bore as well.
It sounds like your going all out with a turbo and methanol so you could probably step up to a larger head with larger valves. I don't think your going to be able to go past a 2.02 intake and a 1.600 exhaust valve with a 3.780 bore. Since your forced induction I don't think you will have to worry about valve shrouding and air stalling like an NA build would.
Nate, what headstuds were/are you running and did the trickflow heads solve the problem? I wonder what the best 4 bolt block can get away with when using a small bore, 1/2" or 2000, etc headstuds and aftermarket thick deck heads.
Trending Topics
TECH Regular
Joined: Oct 2012
Posts: 476
Likes: 2
The Trickflow As cast 220 will fit on a 5.3 bore with the 2.040 intake valve. Have a customer using these heads on a twin 7668'd 5.3 and the head stays put with 34 psi of boost and enough cylinder pressure to make 1200+ at the tire based on the fuel consumption numbers. He uses the regular ARP head studs with LS9 gaskets.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote Thanks guys! Right now I have the stock 862 heads with no port work only LS1 intake valves and they are doing much better than I thought they would but I'm ready to turn it up a little more.
