treysoucie

iTrader: (4)

looking at getting a pair good condition used patriot ls6 style heads stage III. i will be putting them on my ls1 w/ a mti-x1 cam... the motor has piston slap when cold. was wondering if i would be an idiot if i slapped these heads on here?
also would these heads be decent on a 408 when i save up to build one?

cam specs:

duration: i230, e227
lift: i.591, e.571
lobe sep. 112

head flow #'s

Stage III 1020 Superflow Bench 4.125 Bore

Lift
2.08" Intake
1.60" Exhaust

.100
78 cfm
66 cfm

.200
147 cfm
124 cfm

.300
209 cfm
164 cfm

.400
255 cfm
206 cfm

.500
296 cfm
229 cfm

.550
312 cfm
232 cfm

.600
322 cfm
237 cfm

treysoucie

iTrader: (4)

valves & chamber size 2.08/1.60/64cc

will the 64cc combustion chamber lower my c.r. so i would not be able to run 91-93 octane pump gas?
my motor internals are stock except mti-x1 cam.

xaon

iTrader: (12)

heads are OK for the 408... not the best in the world, but you should still make decent power with them.

Cam will work in a 408, but it is a tad on the small side... i'd probably get a different one when the time came to build the 408... great cam for the time being though.

treysoucie

iTrader: (4)

the cam will be replaced when i start the 408, but thats not for a while.

treysoucie

iTrader: (4)

n e other input?

treysoucie

iTrader: (4)

dammit... i called patriot, they said these heads are designed for bigger bore motor... ill be throwing them on a stock ls1. hope it works out ok... i hope my driveability doesnt go to ****!

Aegnor

I thought the Stage III heads were too big for stock LS1 cubes...
Isn't that why they're flowed on a bigger bore (4.125 instead of 3.9)? Plus with valves that big, I think you might need to cut valve reliefs..

treysoucie

iTrader: (4)

i dont think these heads are gonna work on my stock ls1, guess im save em for my 408... kinda sucks, i had hoped on sticking them on my motor now!

treysoucie

iTrader: (4)

do these heads come factory with the chambers cnc'd for a 3.905 bore?

treysoucie

iTrader: (4)

?????

Gunnar@Patriot

iTrader: (20)

We CNC chambers on the stage III heads for 4.00", 4.030", and 4.125" bores.

n20stroker

iTrader: (11)

i have a set of there stage 3 heads. car is set up for nos it made 515/495 n/a

treysoucie

iTrader: (4)

thats a bigbore motor though... i hope i can get away with these on my ls1.

treysoucie

iTrader: (4)

i think if this moves my power range up in the higher rpms, i will get a 4.10 gear to make the car easier to drive on the street... ill just have to take it easy so i dont blow my assend out.

treysoucie

iTrader: (4)

any more input yall?

smok'nZ

iTrader: (160)

i had some #241 heads folwed like crazy rite around 330! for my 408

treysoucie

iTrader: (4)

i will be running this head on my stock ls1 w/ a mti x1 camshaft until i get the 408 which is gonna be a while..
any1 think ill have PV clearance issues?