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Old 10-26-2019, 09:39 PM   #1
weSS1LEy
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Recommend cylinder heads?

Won’t do it for less than 30hp. Looking for increased flow, increased compression and safer valve angle. Anything else I need to consider? AI, AFR, PRC, ...
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Old 10-26-2019, 09:59 PM   #2
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Have yours ported....
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Old 10-26-2019, 11:20 PM   #3
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PRC 260
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Old 10-27-2019, 01:15 AM   #4
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Grab some GM CNC ported, or port your own, and mill them. That is the best bang for the buck.
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Old 10-27-2019, 02:18 AM   #5
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Higher compression will be the real big gains, and power in the mid range I guess. Not much of you're staying same comp ratio.

There's like 2-3 guys in recent threads saying they gained 0hp with ported aftermarket heads. But gained 20-30 in the mid.

I'll just freaking go all out on lightly ported stockers/notching/high comp ratio and spin them to the moon till it blows.

I think with stock manifold and medium cam it's not much of a gain, except better PTV clearance
With higher comp ratio...
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Old 10-27-2019, 05:13 AM   #6
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What about going smaller ported like the TEA TFS 245's?
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Old 10-27-2019, 09:44 AM   #7
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MAST or AFR gets my vote if your set on buying them.
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Old 10-27-2019, 11:49 AM   #8
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Trick flow from Total Engine Airflow, good head with a good valvejob.
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Old 10-27-2019, 11:52 AM   #9
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http://www.totalengineairflow.com/pr...ylinder-heads/
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Old 10-27-2019, 01:12 PM   #10
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And sounds like a ported manifold from GPI may be helpful too?
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Old 10-27-2019, 07:06 PM   #11
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Ttshovel in another thread ....closing in on 7's...says his heads are stock. I'm thinking stock is good.
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Old 10-28-2019, 01:44 AM   #12
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Quote:
Originally Posted by WHAMMO View Post
Higher compression will be the real big gains, and power in the mid range I guess. Not much of you're staying same comp ratio.

There's like 2-3 guys in recent threads saying they gained 0hp with ported aftermarket heads. But gained 20-30 in the mid.

I'll just freaking go all out on lightly ported stockers/notching/high comp ratio and spin them to the moon till it blows.

I think with stock manifold and medium cam it's not much of a gain, except better PTV clearance
With higher comp ratio...
They gained 0 going from stock heads to ported aftermarket?
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Old 10-28-2019, 02:17 AM   #13
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Quote:
Originally Posted by Bo White View Post
They gained 0 going from stock heads to ported aftermarket?
That's what I read, unless I'm crazy. I quoted him. 1 guy* said they gained 30hp/20tq ish in the mid range but 0 up top.

https://www.camaro5.com/forums/showt...=563836&page=2
I'm thinking PRC 260 heads will run away, maybe on extreme setup up top and mid range. Those LS3 are hard to beat up top though.

I like the customizable part of the PRC with chambers available down to 62cc!!

I'd sure hope I'd gain more than 20-30 over LS3 with top tier like Mast or other 3k$ plus heads
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11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE


FED TFS 262cc & LLSR build ahead

Last edited by WHAMMO; 10-28-2019 at 02:34 AM.
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Old 10-28-2019, 10:24 AM   #14
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I gained 15rwhp off ported stock heads alone with a cam so small I was already running with stock springs.
https://www.camaro5.com/forums/showthread.php?t=445936

I then later on swapped to the BTR 3 cam and then swapped to th400.

Wanting more power I swapped over to a set of PRC 260s with 65cc chambers and the TSP F-35 Cam
https://www.camaro5.com/forums/showthread.php?t=520120

All the testing was on the same dyno. Dont know what I gained from the cam or heads seperately but bet most of the gain was from the heads.
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