Patriot Performance Christmas Special ! 243 Heads, $350 per pair... Gold Springs $225
12-26-2006, 10:12 AM
#21
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Originally Posted by vader99
How much hp and torque increase would the nonported ls6 casting give over stock 853 heads?
How about the increase of the cnc'd ls6 castings over stock 853 heads?
What size intake runners do the cnc'd ls6 heads have? What about chamber size? Is milling extra?
How about the increase of the cnc'd ls6 castings over stock 853 heads?
What size intake runners do the cnc'd ls6 heads have? What about chamber size? Is milling extra?
The power increases will depend on your mods. On a stock motor, the 243 non ported castings will gain about 10-15 rwhp. The ported castings will gain about 15-20 rwhp. The bigger cam and more mods you have, the more power the ported heads will give. The oem runner is 212-215, our ported runner is 227 +/-. The combustions chambers will be 64cc.
12-26-2006, 10:18 AM
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Originally Posted by Irocss85
curious, whats the big diff. between the 243's and 241?
I know they chamber isa bit tighter on teh LS2 head, but how much more flow do they start with unported then stock 241?
What about after porting? do the LS2 heads offer better flow potential after porting due to better runner shape/size?
how much do you guys charge to mill those heads before shiping out?
thanks chris
I know they chamber isa bit tighter on teh LS2 head, but how much more flow do they start with unported then stock 241?
What about after porting? do the LS2 heads offer better flow potential after porting due to better runner shape/size?
how much do you guys charge to mill those heads before shiping out?
thanks chris
The 341 and 243 heads have different intake and exhaust runner designs. Also the combustion chamber on a 243 is 64cc as compared to the 241 67cc chamber. The 243 will flow 240@ .600" stock while the 241 will flow 220 @.600". Ported the 243 with a 2.00" valve will flow approx. 300 @.600" the 241 will flow approx. 290-292. We can mill at no charge.
12-26-2006, 03:00 PM
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Originally Posted by juicedSS
what are both of your spring kits rated at? need something for lsk lobes
Go with the Xtreme springs. They will work great with the LSK lobes. 150 on the seat and 405 open.
12-26-2006, 03:01 PM
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Originally Posted by wildta
Can you tell me what seals are on heads, where do they go ?
The bare heads are without seals, but we should have some OEM valve seals if you need them.
12-27-2006, 09:09 PM
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Originally Posted by Gunnar@Patriot
The 341 and 243 heads have different intake and exhaust runner designs. Also the combustion chamber on a 243 is 64cc as compared to the 241 67cc chamber. The 243 will flow 240@ .600" stock while the 241 will flow 220 @.600". Ported the 243 with a 2.00" valve will flow approx. 300 @.600" the 241 will flow approx. 290-292. We can mill at no charge.
12-27-2006, 11:14 PM
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what about if we buy the cnc'd set willing to work a deal with the valves locks and seals i got the springs and a cam kit but this seems like something i would like to jump on. how much hp increase are you guessin with 5.3 stock. got torquer cam and springs waitin for you to make me happy.
12-29-2006, 11:14 AM
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Originally Posted by 98camaroLS1M6
Don't 243s flow in the 25xcfm range stock, and 241s 23x cfm stock, 98heads I thought flowed only 222cfm?
The stock 243's we have teast have been in the 240-244 range @.600" and all LS1 castings have been in the 220-226 range.
12-29-2006, 11:22 AM
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Originally Posted by Pewter53
what about if we buy the cnc'd set willing to work a deal with the valves locks and seals i got the springs and a cam kit but this seems like something i would like to jump on. how much hp increase are you guessin with 5.3 stock. got torquer cam and springs waitin for you to make me happy.
Yes sir, get us a list of what all you will need and we will get you taken care of.
