nomorews6

iTrader: (7)

I am thinking about picking up some of these heads. What do you all think? How well would they work together from a power standpoint on the street and in the 1/4 mile? I have a 3500 stall as well.

nomorews6

iTrader: (7)

ttttt

john563

iTrader: (17)

get the stage 2 think the stage 3 is for more cubes

Dr. Jeckel

iTrader: (12)

Those heads are made for 402's and the like with big cams. Look at a PRC 5.3L stage 2.5 head from TSP( http://www.texas-speed.com/shop/item...id=84&catid=40 ). These will up compression a little to increase power plus keep velocity up, while flowing awesome.
I am looking at the 228R with these heads and the 224 would work great with them aswell.
You need to get the flow characteristics close to the size of cam you are choosing.

Azrael

iTrader: (10)

Survey says, Stage III and stock cubes = no good.

Stage 2 unless you are 383+...

3.4camaro

iTrader: (1)

would he lose power if going to stage III? what is to be gained by staying at stage II?

nomorews6

iTrader: (7)

that is what i want to know as well.

Nate_Taufer

iTrader: (1)

They're designed for a 4" bore. A 2.08 intake valve really isn't necessary on a 3.9" bore. Shrouding becomes a serious issue.

Nate

Dr. Jeckel

iTrader: (12)

If you had a turbo/blower car then the heads would be more help, but for an N/A stock cube motor the higher flowing heads are just simply not necessary to provide the engine with adequate flow to reach its capable HP. You need to keep port velocity high, especially to maximize a smaller cam.
The valves are never going to open past .561" lift so find a head with the best flow numbers up to that lift, because a head that outflows another head at say .600" lift will be no good to you because your cam will never allow the valve to open that much.

nomorews6

iTrader: (7)

ok so what if i cahnge the cam to something massive? will it work well then?

Dr. Jeckel

iTrader: (12)

That question brings up alot more questions like:
What are you using the car for?
do you daily drive it?
Do you want worse driveability?

The heads are really designed for larger cubes. If you are dead set on these heads, which I don't recommend, then you are going to have to look at what you want from the car.

Email Patriot and ask them if you would like. Get it from "The Horses Mouth".

rubber duck

iTrader: (7)

Even if you ran a monster cam they'd still be overkill. Your low speed torque would suffer greatly. Even if you get a great deal on them, after all the work it'll take for the swap and the tuning, you'll be disappointed in the end. Do it once, do it right. If you look just a few threads down there's one dedicated to picking out the right set of heads for a 224 cam.

3.4camaro

iTrader: (1)

i am certainly no expert on this, but wouldnt you pick out a set of heads(the more expensive parts) before choosing a cam? I would think one should decide heads then get a cam to work around the heads and drivability issues.

.02

and also id be pissed if i bought all the stuff and then wanted to go bigger. in texas its go big or go home!

Dr. Jeckel

iTrader: (12)

Actually the cam dictates your power curve, driveability, etc. and the heads should compliment the cams strengths. So yes you need to choose the heads, but not necessarily first. You need to figure out what you are wanting to do then build the system for that.
I am going to do a 228R cam first, but I already know what heads I am going to use with it and the type of driving and expectations I have for the car.

nomorews6

iTrader: (7)

thanks guys - i think i'm gonna stick with my 224. If I wanted a crazy hp car, i would have bought one! I don't want to get caught up in all that again

Dr. Jeckel

iTrader: (12)

Very smart IMHO

westxwitesnake05

iTrader: (17)

I've got a set of stgII Ls6 patriot heads for sale on ls1.com. Supposedly i have a buyer but once again, i havnt heard back from him in a couple days or gotten a real yes or no yet. If youre interested check them out and see if they are what you are looking for. I would have them listed on this site but i dont have enough posts yet

Patriot Heads

rubber duck

iTrader: (7)

The best scenario is picking up a head and cam combo at the same time that compliment each other. But I'd say most do a cam first then heads later. Either way, if they don't compliment each other's strengths and weaknesses your going to have a combo that isn't fully optimized. A n/a 346 simply doesn't move enough air for the stage 3's.