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AI 241s vs PRC 5.3

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Old Nov 30, 2011 | 04:13 PM
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Default AI 241s vs PRC 5.3

I'm in the market for heads for my car. I'm running an EPS 226/234 113 lsa +3 cam. I have found that just about everyone that runs PRC 5.3s make good results. But im having trouble finding many results with AI 241s. Before i go out and spend money i figured itd be best to ask if anybody has used the 241s and which would be the best to go with.
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Old Nov 30, 2011 | 04:47 PM
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I would go with whatever is cheaper. They will probably be pretty close in HP honestly.
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Old Nov 30, 2011 | 05:37 PM
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imo just get a used set of 243s and send them to AI you'll make more power with the 243s over the 241s and the 5.3 heads and there right about the same price wise as far as getting them ported
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Old Nov 30, 2011 | 05:42 PM
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Originally Posted by twolow02fransen
imo just get a used set of 243s and send them to AI you'll make more power with the 243s over the 241s and the 5.3 heads and there right about the same price wise as far as getting them ported
I agree with this...if he already has the 241s that would make it about $400 cheaper though...
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Old Nov 30, 2011 | 05:46 PM
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Originally Posted by ss454327
I agree with this...if he already has the 241s that would make it about $400 cheaper though...
I only paid $325 for my brand new 243's, you just have to wait for a good deal.
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Old Nov 30, 2011 | 05:51 PM
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Get some 243s if a good deal presents itself
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Old Nov 30, 2011 | 06:22 PM
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yeah i paid $350 for mine off ebay and i sold my stock 317s for $400 so i made $50 bucks score imo
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Old Dec 1, 2011 | 03:59 PM
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Sorry guys ive decided not to use 243s for this particular build. Just want to get some info and results on the AI 241 heads.
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Old Dec 1, 2011 | 04:14 PM
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A.I. 241 all day.

Last edited by 01ssreda4; Feb 14, 2012 at 11:52 PM.
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Old Dec 1, 2011 | 04:21 PM
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I am sending my 241s to AI next week for their new HCR219 port. There is not much info on them yet but I spoke with AI and he said 450-480 rwhp can be expected with full bolt ons and a matched cam. He said the 5.3 and the HCR219 241s make same power bc they can now make 11-1 cr with 241s with stock p2v.

yes the 243 makes 15hp more but if your on a budget like I am send your 241s to AI and save yourself $400.

If you want to wait to see my results my car will be tuned and dyno'd early spring.
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Old Dec 1, 2011 | 06:56 PM
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Thatd be awesome i was planning on doing the same porting package if i went with AI. And im on a budget like you aswell. The problem with my car is its completely stock so im starting with a bone stock car. The good thing is im starting with a 25k mile car
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Old Dec 1, 2011 | 07:33 PM
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https://ls1tech.com/forums/dynamomet...ck-valves.html

Here's some results I found in search, I wouldn't expect the PRC 5.3s/243s to make much higher than 5rwhp more if any more power.
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