Keith Craft Heads??
01-03-2009, 05:54 PM
#21
Don't worry about what ls2 bait said. Intakes couldn't give a crap about the lift on your cam. That's one problem with the internet.. truth until proven wrong. The less you trust posts online, the better off you'll be. For one example, he basicly said "your cam is too small to need heads with amazing flow, so don't bother." Tell that to AFR, with their 205cc runner and 224/228 cam combo. A nice rule of thumb: If you can afford it, spend the money on heads.
01-03-2009, 08:08 PM
#22
Don't worry about what ls2 bait said. Intakes couldn't give a crap about the lift on your cam. That's one problem with the internet.. truth until proven wrong. The less you trust posts online, the better off you'll be. For one example, he basicly said "your cam is too small to need heads with amazing flow, so don't bother." Tell that to AFR, with their 205cc runner and 224/228 cam combo. A nice rule of thumb: If you can afford it, spend the money on heads.
01-03-2009, 08:12 PM
#23
I don't mean to be over-thinking it, I am just trying to make a good decision. It's a lot of money I am spending here on everything and I want to do it right. And I am not just looking at the flow numbers @.600, I am looking at all of the flow #'s at different lifts. Yes, I also look at the .600 too just to see whats its capable of but I know the 228R is only a .588 lift cam. And yeah I still have my stock LS6 intake. Not sure what you mean by pointing out that my stock intake is not good for higher lift cams...what relevance does that have to me when I am not getting a "higher lift" cam? I've already purchased the 228R and now looking for the best heads for them, thats all. And for the record, I'd personally call a 228R a mid-sized cam. But thats relative to "streetable" cams, as my car is a street car, not a track rig.
01-03-2009, 09:54 PM
#26
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Even then...you could spend $500 on a valve job and milling on the 243's and not touch the ports and make as much power with the 243's as you would with the cnc ported 5.3's. Then if you want to push it further you could have a nice CNC program done on the 243's later.
01-03-2009, 09:55 PM
#27
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BTW, show me a Z06 that's gained 30rwhp by pulling the stock 243's and going with ported 5.3's. Interestingly enough I've never seen one gain that unless they were on a real happy dyno.
01-03-2009, 10:05 PM
#28
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Well I originally inquired about having my heads ported, and Dennis @ The Vette Docs gave prices that were quite high to have them ported etc. He said I'd be better off buying a set that was already ported and than selling off mine. So I started looking at the PRC heads as they seem to be the best bang for the buck....especially considering I just bought a cam kit from them and I assume they will give me a price reduction on par with the differenc of what their heads/cam package is. Their ported stage 2.5 LS6 heads are $300 more than the ported 5.3's and I just don't know if thats worth it...especially considering there are several people out there saying the 5.3's would actually be a better combo with my 228r cam...
As far as the 30-35rwhp increase, predator-z said that right in this thread, and I am also going on an estimate based on numbers I have seen with those heads and the same or similar cam.
As I posted in the other thread. You are saying the LS6 heads are so much better. Well, can you quantify that? What would the advantages be? 5hp more peak power?
As far as the 30-35rwhp increase, predator-z said that right in this thread, and I am also going on an estimate based on numbers I have seen with those heads and the same or similar cam.
As I posted in the other thread. You are saying the LS6 heads are so much better. Well, can you quantify that? What would the advantages be? 5hp more peak power?
01-03-2009, 10:12 PM
#30
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If you want to put a truck head on your Z06 then have at it, it's your car. Ask some of the big names in cylinder head porting which stock casting is the best, or for that matter do a search. Honestly PRC heads are lower end budget heads so either casting with their port work will probably work fine for what you want.
01-03-2009, 10:15 PM
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The heads are probably the very best area to gain power. Spend the money on them now and save up for other stuff(like a FAST intake) later. If the TEA LS6 heads are the same price as PRC then I'd definitely pick the TEA stuff.
01-03-2009, 10:30 PM
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no, the TEA heads are much more expensive, as are the AFR's. Honestly, I never seem to see any better numbers from those high dollar heads. It seems more like you pay for the name more than anything. Most people seem to be quite happy with their PRC heads...and they seem to produce good results. There's a ton of people on the board who have them. So it seems there heads work well, but just so happen to be priced reasonably.
Now if AFR and TEA etc are so much better, that's fine, but why? Where's the proof? Is the couple of hp difference they might make worth double the price?
Now if AFR and TEA etc are so much better, that's fine, but why? Where's the proof? Is the couple of hp difference they might make worth double the price?
01-04-2009, 10:06 AM
#33
no, the TEA heads are much more expensive, as are the AFR's. Honestly, I never seem to see any better numbers from those high dollar heads. It seems more like you pay for the name more than anything. Most people seem to be quite happy with their PRC heads...and they seem to produce good results. There's a ton of people on the board who have them. So it seems there heads work well, but just so happen to be priced reasonably.
Now if AFR and TEA etc are so much better, that's fine, but why? Where's the proof? Is the couple of hp difference they might make worth double the price?
Now if AFR and TEA etc are so much better, that's fine, but why? Where's the proof? Is the couple of hp difference they might make worth double the price?
