[Z06] PRC 265cc heads vs stock LS7(270ccc??)
01-13-2013, 10:42 AM
#1
Race Director
Thread Starter
PRC 265cc heads vs stock LS7(270ccc??)
I am getting quotes and info on swapping the heads out on my 2007 Z06 at this time.
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
01-13-2013, 11:29 AM
#2
I want to say the stock LS7 intake runner is in the 250's range for CC's.
The LS3 is around 270 stock, correct me if I'm wrong.
Beyond that the PRC's heads have performed well on many occasions. I don't have them but I wouldn't hesitate trusting them.
The LS3 is around 270 stock, correct me if I'm wrong.
Beyond that the PRC's heads have performed well on many occasions. I don't have them but I wouldn't hesitate trusting them.
01-13-2013, 02:23 PM
#6
Burning Brakes
I am getting quotes and info on swapping the heads out on my 2007 Z06 at this time.
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
Appear to be good product if you can get past thier bad attitude on the phone. They are great as long as you call and say "I have cash and want these parts".
God forbid you have techical questions of any complexity; thier attitude changes in a hurry as if you are bothering them. I don't know what happened to them because it used to be just the opposite years ago.
I've dumped them from my option list for shopping aftermarket castings. Options are:
Brodix
Mast Motorsports
All Pro (WCCH)
RHS
-jeff
01-13-2013, 02:56 PM
#7
Drifting
Member Since: May 2011
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I am getting quotes and info on swapping the heads out on my 2007 Z06 at this time.
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
The info I have is that the stock LS7 head has a 270cc intake runner. Can anyone confirm this? I was originally thinking of stepping up to a P/P'd LS7 head for my Z, as I want to have a torquer 110 put in it soon, but the more I look at the PRC 265cc LS7 head, I think this is absolutely the way to go. Smaller port volume with the higher flow numbers it achieves, means a higher velocity intake charge. This should help with torque development across the RPM range.
There was also an article on LS7 heads being tested and the PRC heads did a very good job right out of the box in the test.
Should I just place the order this week? Can't really see a reason not to go this route in terms of price and performance at this point. Should do better than PP'd LS7 heads at about the same price(PRCs use new Ti valves being my price point comparison).
Last edited by z0sicktanner; 01-13-2013 at 03:08 PM.
01-13-2013, 03:11 PM
#8
Race Director
Thread Starter
Thank you. GMPP lists the LS7 head with CNC ports at 270cc and that must have gotten confused in with my info. The PRC 265cc heads flow much better than the specs GMPP lists on those 270cc heads.
01-13-2013, 03:12 PM
#9
Race Director
Thread Starter
01-13-2013, 06:04 PM
#10
Burning Brakes
I have a new set of PRC 265's in my closet. I plan to start on the install this week. I'm selling my stock heads(should be worth arount a grand) so the offset will make the purchase very comfortable. I'm also doing the Comp rocker arm upgrade. May as well kill two birds while the car is down.
If you don't mind waiting by all means have your heads done. I like the thicker meat on the PRC's...so thats why I think it's a better deal for me.
If you don't mind waiting by all means have your heads done. I like the thicker meat on the PRC's...so thats why I think it's a better deal for me.
01-14-2013, 07:04 AM
#13
Safety Car
Member Since: Dec 1999
Location: Virginia Beach, VA & Port Charlotte, FL (snowbird)
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I'm very pleased with my PRC 265s. Top notch quality and they perform great! My car is 99% street driven and on the street torque rules. My combo delivered earth moving torque combined with the relatively tame Torquer 110
Over 500 lb ft at the tires by 3600 RPMs....
Over 500 lb ft at the tires by 3600 RPMs....
01-14-2013, 10:27 AM
#14
Race Director
Thread Starter
That is the combo I want to eventually have. Budget says I can only get the heads on now, but I hope to get the Torquer 110 and LTs on it by later this year. Very nice numbers on your set up!!