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Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

PRC 227 vs. TFS 225 or AFR 230 v2

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Old 07-23-2015, 07:57 PM
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The issue with running the LLSR... the shaft mount rockers are different for TFS heads and stock heads (which I assume PRC could use). AFR uses stock head shaft mounts. That's a **** ton of money buying a couple of sets of shaft mounts.
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Old 07-29-2015, 11:36 AM
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IIRC, PRCs casted heads are 13* or 13.5*
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Old 07-31-2015, 12:51 PM
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TFS are 13.5*. TSP is 12* and a lot of Mast is 11*

Stock is 15*
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Old 07-31-2015, 12:56 PM
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Originally Posted by dr_whigham
TFS are 13.5*. TSP is 12* and a lot of Mast is 11*

Stock is 15*
I believe TSP/PRC copied the TFS 13.5 geometry...
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Old 07-31-2015, 01:19 PM
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I'd actually like some clarification now. Back when Aaron was there we discussed this and he said 12*

The plot thickens...
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Old 07-31-2015, 03:07 PM
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PRC cathedrals are 13*
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Old 07-31-2015, 03:48 PM
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Originally Posted by dr_whigham
I'd actually like some clarification now. Back when Aaron was there we discussed this and he said 12*

The plot thickens...
The cathedral PRC's are 13.5 technically. LS7's are 12. I'd imagine if Aaron said they were 12 he most likely just misspoke, as he was pretty familiar with our heads. It can get pretty crazy around here with our call volume so I could see it happen anyway.
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Old 07-31-2015, 11:52 PM
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Originally Posted by Brian Tooley
No, we need Tony Mamo in here, it would be like the good ole days... lol
I'm your Huckleberry.....LOL

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Old 08-07-2015, 08:29 PM
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Originally Posted by Tony Mamo
I'm your Huckleberry.....LOL

lmao. tff
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Old 01-02-2018, 07:44 PM
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I hate to bring up a rather dated thread... But, this would have been pretty awesome if it had actually happened. So, why didnt it? Time? Investment? A combination of the 2?
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Old 01-10-2018, 01:07 PM
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I agree i would like to see more #'s on the PRC heads since there isn't much out there.
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Old 01-13-2018, 04:58 PM
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PRCs seem to do good on dynos (237 and LS7) but people that do buy em don't seen to be on LS1tech.

It would be nice to have TSP share some real word dyno graphs of their PRC headed engines. Get the word out there. They (TSP) really shine with their 265 LS7 heads.
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