beast2001

I have N/A LS1 engine with full bolt (full exhaust, fast 90/90, pully, Ram Air) and mid range cam.
I am planning to get the patriot stage 3 with Part No. 2015
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.08"
Exhaust Valve: 1.60"

Is it ok to run them on my setup or I need something else ? because it is written in their web site that they are a great choice for 4.00” and larger bore motors due to their valve size

But I heared some people install them with same setup as mine without any problem

I need a confirm before I get them

Sales4@Texas-Speed

iTrader: (4)

IMO those heads would be too big for your setup. I am not even sure you would have enough piston to valve clearance to run that setup without flycutting the pistons. I would look into a little bit smaller of a head setup.

01ssreda4

iTrader: (96)

^^Im with him on that Too much runner.

beast2001

I think the prblem not with the runner
It is from the valve size, because stage 2 & 3 have the same runner size
It seems that I will hold the purchase of those head

MM98

iTrader: (13)

2.08 intake valve is way overkill for stock cubes & would cause shrouding more than likely.. Think 2.04 would be about the max I would go on stock cubes.

Sales2@Texas-speed

iTrader: (5)

Agreed, not so much due to runner but valve size. I'd check out the PRC Stage 2 LS6 heads if you're looking for something better suited for a stock cubed LS1! They are on special for Christmas right now ($150 off)!!

http://www.texas-speed.com/shop/item...d=134&catid=40