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Old 02-28-2013, 08:37 AM   #1
villan2
 
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March 28 prc cylinder heads results

I purchased PRC 260cc cylinder heads ill have results hopefully March 28...... Current mods cam 226/238 .570/.585 113.5 102 throttle body, 102 manifold, balancer, Cora exhaust, twin disc clutch, tune and dynatech heads 474.87 rp 457.79 rq I hope to make around 510 with heads......

http://m.youtube.com/watch?v=mueG3BPsPxA&feature=plcp
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Old 02-28-2013, 08:46 AM   #2
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Good luck with it. PRC makes a good head, are you getting a smaller combustion chamber to bump the CR or are you staying with 70CC?
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Old 02-28-2013, 08:48 AM   #3
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68cc
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Old 02-28-2013, 09:59 AM   #4
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I have my doubts you'll hit 500+ with that cam, especially if you arent upping the CR.
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Old 02-28-2013, 10:05 AM   #5
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I have the same heads but went with 65cc chambers to bring my CR up to 9.9something. I also went with the hollow intake valves. You will have your dyno results before me. I probably won't get mine until May. They certainly are beautiful in person.
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Old 02-28-2013, 10:54 AM   #6
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Doh what cc should I do then?
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Old 02-28-2013, 11:03 AM   #7
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Stock is 70CC.
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Old 02-28-2013, 11:06 AM   #8
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Is 68cc good or should have I went lower cc?
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Old 02-28-2013, 11:09 AM   #9
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I am going to do a procharger and stoker kit also this winter... What chamber size should I have gone with then?
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Old 02-28-2013, 11:10 AM   #10
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it really depends on your longterm goals. If you plan to stay NA and have access to higher octane fuel id suggest calling TSP and giving them your cam size and they can help you with milling requirements (CC's)
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Old 02-28-2013, 11:11 AM   #11
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Quote:
Originally Posted by Gunslinger09 View Post
Stock is 70CC.

the aftermarket PRC's arent straight across CR based on CC's.
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Old 02-28-2013, 11:12 AM   #12
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Originally Posted by villan2 View Post
I am going to do a procharger and stoker kit also this winter... What chamber size should I have gone with then?

keep 68-70
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Old 02-28-2013, 11:14 AM   #13
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Quote:
Originally Posted by blake-b View Post
I have the same heads but went with 65cc chambers to bring my CR up to 9.9something. I also went with the hollow intake valves. You will have your dyno results before me. I probably won't get mine until May. They certainly are beautiful in person.

did someone recommend this for your blower setup? seems like someone gave you a bad recommendation based on what little I know. you should have went with a 68-70 CC to keep CR around 8.5-9 and also a stronger valve is ideal . maybe someone can chime in with more knowledge than I.
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Old 02-28-2013, 11:22 AM   #14
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I called them they said stay with the 68cc camper thanks wanted make sure when I ordered them I kinda forgot to think about that lol
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