Bobsmyuncle

iTrader: (32)

alright, i am looking to swap out my untouched 862s for some better flowing heads. the car made 840 thru the th400 and 9" with the 862s, im hoping to get more out of it. they will need to fit stock 5.3 bore. and id like the thickest deck possible. its currently on 25.5#s

LS1NOVA

iTrader: (12)

Trick Flow 220's

djfury05

iTrader: (30)

Trickflow 220s only have a .600 deck. AFR's .750. RHS heads have a .800 deck.

Bobsmyuncle

iTrader: (32)

What afr and what rhs heads would fit?

djfury05

iTrader: (30)

AFR 205s probably.. maybe their 215s I havent looked into it.. not sure abot RHS heads just randomly seen they had a thick deck.

Bobsmyuncle

iTrader: (32)

I've looked at the rhs before bc if I remember the price isn't bad. But I believe they were bare castings.

o2camaross

iTrader: (2)

Damn making some power! I've always been a fan of AFR. What turbo and cam are you running?

Bobsmyuncle

iTrader: (32)

It's a baby, 207/220 .574/.574 118.5lsa. I am hoping to up that to a 220ish if I can find one reasonable. Gt4788 with the race cover. Not bad for a 5.3 with stock heads

o2camaross

iTrader: (2)

Not at all man. Bigger cam will help a lot too

djfury05

iTrader: (30)

You might be able to run turned down LS3 intake valves and LY6 inconel exhaust valves in the RHS heads. Talk to Brian Tooley. He can hook you up with a cheap spring kit also.

Brian Tooley Racing

iTrader: (13)

I've had buddies run the TFS 205's and 215's both on turbo 5.3 engines and the 215's actually made more power. Holdener made 1300 hp with 215's on a stock 5.3 shortblock.

Although since the 220 "LS1" heads have the same CNC chamber as the 215 you could consider those also, like LS1NOVA mentioned.

I know the 215's have a lot of chamber to bore overhang, but they seem to work. They even made more power N/A, almost 510 hp.

You could order them through TEA with PM guides so you can run stock rockers. Or you can order them through me to save sales tax.

Bobsmyuncle

iTrader: (32)

Could I get just the bare castings from tea? I have springs and ti retainers already, and I have a set of 2.02/1.60 valves already. Hoping to make a cheap upgrade here

Brian Tooley Racing

iTrader: (13)

You can get them without the spring kit, no problem. The TFS 215's and As Cast 220 LS1 heads require 2.04"/1.575" and the intake valves are VERY specific to that head. Trying to change the intake valves could kill the way the head flows.

You could get the TFS 205's, they use stock 2.00"/1.55" valves, and the stock valves practically flow more than the Ferrea valves they come with. Some 205's with stock hollow stem/sodium filled Z06 valves would be super trick. A buddy of mine ran those exact heads on a 5.3 with a 223/230 cam I did and ran 127 in the 1/8 mile.

I would probably go for the As Cast 220 and at least buy the intake valves, you could have them grind your 1.600" exhaust valves to a 50 degree seat and run them. Otherwise standard 1.600" exhaust valves on that combination will generally make less power.

BLWN1

iTrader: (6)

Good info as always...

TurboMonte100

iTrader: (1)

Brian when you say they have a lot of chamber to bore overhang, how much are they, what are you calling a lot?

Brian Tooley Racing

iTrader: (13)

I designed the 205 chambers to be 3.90" diameter, which I thought was plenty aggressive for a 3.78" bore.

The 215 chambers have a 3.950" bore to match 5.7 LS1 head gaskets.

I know guys are using 317 heads with 4" bore on these 5.3's with decent results.

I've never liked a lot of chamber to cylinder bore overhang, it just seemed like a bad idea, especially when looking at stuff on a flow bench. But the dyno doesn't lie...