firefightergib

iTrader: (45)

Ive started on my new build and trying to decide exactly how I want everything and I am looking for some input on the heads. Before I get to far, I am on a limited budget and most likely will be going with Patriot or PRC heads, leaning more toward Patriot for the fact that I live about 20 mins from their shop. Here is what ive got so far, Im keeping stock CI, Scat H-beam rods w/ Mahle Piston w/ -4cc valve reliefs, and a MS4 camshaft specs are 239/242 .649/ .609 111LSA, I was considering the Patriot Stage 3 Heads, but Ive read where some people say its to big of a head for stock CI, here are the specs on these heads if not familiar with it:
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.08"
Exhaust Valve: 1.60"
Max. Valve Spring Lift: 0.650"
Spring Pressure Closed: 135 lbs. @ 1.800"
Spring Pressure Open: 375 lbs. @ 1.090"
Retainer Material: Titanium
Valve Seal Material: Viton
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle

There site says they flow 320intake @ .600 and 235exhaust @ 600. Would this head be wrong for my setup?? Thanks

tnmotown

iTrader: (107)

I would think with that cam it would be decent for it making power up top, but maybe lose some down low. I am considering these heads also....but for my 408

caseypryan

iTrader: (10)

stage 3 heads are usually for bigger cube motors..

SS4Luck

iTrader: (10)

the prc 227s that TSP likes to put on the MS4s have 227/84cc runner, i dont see why the stage 3 wouldnt work as long as they are the right bore size and clear the pistons (after cutting)

caseypryan

iTrader: (10)

intake valves over 2.04" is a overkill for stock cubes

SS4Luck

iTrader: (10)

well TSPs record says otherwise there are a lot of people running patriot 3s w/ a trex also

blocc monster

stage 3 are 2.08 intake valves by the way.

Darkman

iTrader: (2)

To the OP: What transmission and what rear gear do you have?

firefightergib

iTrader: (45)

4k stall automatic trans w/ 4.10 gears

Darkman

iTrader: (2)

Okay, and Thanks.

SS4Luck

iTrader: (10)

IMO opinion your setup sounds great for them. What inatke would you top it off with? The stage 3 sound a lot like the prc 227s and every setup ive seen that was ms4/227 has ran like a raped ape, but they also had ported fasts on top. Not saying a normal 92/92 or even 102/102 wouldnt be good, but i think a LS6 intake would hinder perfemance just because of not being able to get enough air in

firefightergib

iTrader: (45)

i was kinda of afraid of that too but for now its going to be a ls6 intake till i get some more cash saved up, my funds are starting to get thin with as much as ive already got

Sales2@Texas-speed

iTrader: (5)

You'll definitely have to flycut your pistons for that combo! If you're interested in a head that does not require cutting piston,s I would consider the PRC Stage 1 LS6's or the PRC 227's (same as on our record holder car in my sig)! We have a $150 off special for the LS6's and $250 off the aftermarket casting 227's right now!

fatmat80

I would go with the 227s from Tsp. Might as well go with a winning/proven combo. There are some patriot/ms4 combos but i think you would be much happier with either the tsp 215s or the tsp 227.

supersick99z

iTrader: (66)

Go Patriots For the price you can't beat them! Cam only I put down 366/341 and then later added my Patriot Stage 2 5.3's & LS6 intake and put down 417/375. I paid $600 for my Patriot heads almost brand new unassembled and for that price I'd say they are a pretty good head!

MM98

iTrader: (13)

The Patriot stage 3's are nothing like the PRC 227's... The 227's are their own casting using a 2.06 intake valve that is set-up in the head in a way to provide clearance.. Patriot uses 243 castings with a huge 2.08 valve that will hinder flow on stock ci.. They specifically say for larger ci engines.

caseypryan

iTrader: (10)

exactly why I said over 2.04...anything over that is usually over kill on stock cubes