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First Pics PRC 220cc As Cast Cathedral Heads INSIDE!!

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Old 03-26-2012, 02:55 PM
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Any pricing yet?
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Old 03-27-2012, 11:07 AM
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Im ready to see what these will do on a 6.0! Ive been searching for some nice budget heads.
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Old 03-27-2012, 01:41 PM
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Are you guys doing any other tests?
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Old 04-10-2012, 09:51 PM
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Any updates / pricing?
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Old 04-29-2012, 05:00 PM
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I am in the market for a set of heads, any new updates on these heads?


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Old 05-21-2012, 07:27 PM
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I think they posted $1800 on another thread
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Old 05-27-2012, 08:21 AM
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Are those hp numbers rear wheel or ?
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Old 06-15-2012, 08:00 AM
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Subscribed for price!
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Old 06-15-2012, 08:20 AM
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They're suppossed to be released Monday
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Old 06-15-2012, 08:24 AM
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Originally Posted by dr_whigham
They're suppossed to be released Monday
Thanks
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Old 06-15-2012, 09:45 AM
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Originally Posted by JohnJanz@Texas-Speed
We will have the as cast heads here on monday to port and send out. We can start taking orders on monday for them. I have them on my car and they work great. I picked up almost 30rwhp over my stock 243 castings with them.
Found it; This was posted last night in this thread

https://ls1tech.com/forums/generatio...l#post16419454
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Old 06-29-2012, 03:26 PM
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Anyone place an order yet for these heads? I'm on the fence.
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Old 06-29-2012, 04:51 PM
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Heads are on the website, we have 2 pairs in stock and more on the way!

http://www.texas-speed.com/p-3515-pr...ast-heads.aspx
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Old 06-30-2012, 10:18 PM
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How would these new heads compare to the PRC Stage 2.5 LS6 heads? Would it be a worthwhile upgrade in power? 10-15HP?
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Old 07-01-2012, 08:48 PM
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I already have springs can I buy these heads without springs for less money? If so how much?

How would they match up with my Trex cam? Or would you suggest a different cam for max power?
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Old 07-02-2012, 08:55 AM
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Originally Posted by Bramlok
How would these new heads compare to the PRC Stage 2.5 LS6 heads? Would it be a worthwhile upgrade in power? 10-15HP?
would like to know too..i have the stage 2.5 5.3 heads and would like to know what the gains would be
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Old 07-02-2012, 02:44 PM
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Originally Posted by JohnJanz@Texas-Speed
Heads are on the website, we have 2 pairs in stock and more on the way!

http://www.texas-speed.com/p-3515-pr...ast-heads.aspx
have you guys installed these on a shop car or customers car with a before and after comparison vs a stock 243?
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Old 07-05-2012, 09:21 AM
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Compairing the 5.3 2.5 head with 58cc chamber and the cathedral heas which will make more power with the MS3 cam?
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Old 07-05-2012, 10:03 PM
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Originally Posted by 1990LSx
have you guys installed these on a shop car or customers car with a before and after comparison vs a stock 243?
Yes we did a comparison on my personal 01 z06. This thread has the dyno graphs. I picked up right at 30rwhp over the stock 243s that were on my car stock.

https://ls1tech.com/forums/dynamomet...ts-01-z06.html
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Old 07-05-2012, 10:15 PM
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Originally Posted by JIMS SVT
Compairing the 5.3 2.5 head with 58cc chamber and the cathedral heas which will make more power with the MS3 cam?
Well there are some complications to this question. the 2.5 5.3 heads don't fit properly with the ms3 if they have been milled to a 58cc chamber unless someone has flycut the pistons. So if thats the case then you could mill the 220 heads to 58 and I would fully expect to see a notable pick up over the 5.3s at that point. The larger valve with the extra compression would really help make more power with that sized cam in my opinion. Keep in mind this is all assuming the pistons are flycut.
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