afr or prc heads ?????
Unlike other bolt-ons, the problem with compromising in your heads is that it is an expensive procees if you decide later that you wish you had the extra power. The power made by good heads does not have any compromises. They will make power everywhere and not have an adverse effect on drivability. Also if you already have the basic bolt-ons (LS6 intake, headers, pulley, lid, exhaust) where are you going to get the extra HP you left on the table and how much will that cost?
The economics of situation will dictate your budget and a decent low $ head is better than stock. Just be honest about how far you want to take the car and how much you race. The more you race, the unhappier you will be if compromise on your heads.
The economics of situation will dictate your budget and a decent low $ head is better than stock. Just be honest about how far you want to take the car and how much you race. The more you race, the unhappier you will be if compromise on your heads.
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Verdad Gallardo wait till tea gets ahold of the new 06 truck heads which feature the ls7 port design and will fit our 3.9 bores with the 12 degree valves! Afr's will no longer be top dog. Hell even now they are running into trouble with the edelbrock/lingenfelter castings and the new dart castings that are only 500 bucks bare or 650 assembled with very similar flow numbers as the afr's. There are also the all pro's so no longer are the afr's the only aftermarket castings there are many to choose from. You can buy the dart 225 or 205 bare head for 500 a piece and have tea do their magic on them and you will have a better head than the afr for far less money so already afr is no longer top dog. IMO.
Originally Posted by SS1875
Lingenfelter heads get my vote...as good or better flow than AFR'S ....check before you say no way!!
just some FYI there's a 383 with mild cam, bolt ons and out the box 225's that should best your numbers by 30-35rwhp. should be posted shortly.
Ragtop hit the nail on the head in this thread
52172 - AFR isnt running into any trouble, they've already proven themselves in the market. Time will tell how the other aftermarket heads play out in the real world. and talk to Pat (Pdd) and 2c5's and see what kind of "magic" TEA is working on those AFR castings. stop spreading rhetoric on which you know nothing about.
Originally Posted by jrp
arent you the same dude who brought that up in another AFR vs * thread and you didnt bring any factual data comparing your claim.
just some FYI there's a 383 with mild cam, bolt ons and out the box 225's that should best your numbers by 30-35rwhp. should be posted shortly.
Ragtop hit the nail on the head in this thread
52172 - AFR isnt running into any trouble, they've already proven themselves in the market. Time will tell how the other aftermarket heads play out in the real world. and talk to Pat (Pdd) and 2c5's and see what kind of "magic" TEA is working on those AFR castings. stop spreading rhetoric on which you know nothing about.
just some FYI there's a 383 with mild cam, bolt ons and out the box 225's that should best your numbers by 30-35rwhp. should be posted shortly.
Ragtop hit the nail on the head in this thread
52172 - AFR isnt running into any trouble, they've already proven themselves in the market. Time will tell how the other aftermarket heads play out in the real world. and talk to Pat (Pdd) and 2c5's and see what kind of "magic" TEA is working on those AFR castings. stop spreading rhetoric on which you know nothing about.
Last edited by 52172; Sep 14, 2005 at 09:17 PM.
Originally Posted by 52172
I wouldn/t say I know nothing about. I know a lot about heads and you know the new heads coming out are able to produce the same if not better numbers than the afr's. The dart heads are being sold at a price that afr can not compete with. I am not saying anything bad about afr's I agree they are the best head that can be bought right now, but there are more than three heads that are going to be available in the next coming months that will give them a run for the money and maybe less money that is. The ls7 head flows over 360 cfm, but that is for at least a 4.060 bore. That 12 degree valve angle is a very nice feature. I have never even seen a hand ported 225 afr head flow anywhere near 360 cfm A and A corvette sells a custom afr 235cc intake runner afr head that is designed for large bores and it does not even flow over 360 cfm and that is with hand porting. Wait till the ls7 heads are hand ported along with their factory cnc porting they will probibly flow 380 cfm which is unheard of from any afr casting.The 06 truck heads in the hands of a capable head porter will give the afr's a run for the money I know that.
like i said, time will tell how things pan out in the real world and what kind of combo's people are putting together. also am curious to see what type of intakes these large flowing heads are going to see. also, keep in mind numbers on a bench or theorized dont always translate into the desired e.t or dyno numbers.
everyone is talking about the ls7 head, do you really think its gonna be at a competetive price with even the afrs? i think its gonna be outragously priced. but if they make it work and you want something wicked by all means thats a great choice, but di you think they will be available for anything under 3500? plus you need a new manifold and some other **** too i am willing to bet, something that will prob cost about 2000 more than afr, but hey if its another 40 hp and you have the cash...
Originally Posted by jrp
52172 - AFR isnt running into any trouble, they've already proven themselves in the market. Time will tell how the other aftermarket heads play out in the real world. and talk to Pat (Pdd) and 2c5's and see what kind of "magic" TEA is working on those AFR castings. stop spreading rhetoric on which you know nothing about.
When can I send you one of our heads to flow test, since you have never had the oportunity to do so. Please don't forget, TEA is under new ownership and our quality and performance have never been better.
Originally Posted by jrp
your comparing a 12* 270cc 2.20 valve race head against a 15* 225cc 2.080 street head
like i said, time will tell how things pan out in the real world and what kind of combo's people are putting together. also am curious to see what type of intakes these large flowing heads are going to see. also, keep in mind numbers on a bench or theorized dont always translate into the desired e.t or dyno numbers.
like i said, time will tell how things pan out in the real world and what kind of combo's people are putting together. also am curious to see what type of intakes these large flowing heads are going to see. also, keep in mind numbers on a bench or theorized dont always translate into the desired e.t or dyno numbers.
Its all good.
Last edited by 52172; Sep 19, 2005 at 07:51 PM.
Originally Posted by Brian Tooley
JRP......Our LS6 Stg 2.5 have outpowered the AFR 205 heads by 20 RWHP, our 5.3 heads consistently make 440 RWHP and our new Stg 1 5.7 head just made 451 RWHP, more to come on this. As for PDD, don't forget that he pulled off PP heads and installed AFR 205' and Fast 90/90 and picked up 20 RWHP TOTAL!!
When can I send you one of our heads to flow test, since you have never had the oportunity to do so. Please don't forget, TEA is under new ownership and our quality and performance have never been better.
When can I send you one of our heads to flow test, since you have never had the oportunity to do so. Please don't forget, TEA is under new ownership and our quality and performance have never been better.
like i told brent a some weeks back, steve is busy getting the new 4.200 sleeve's ready and i'd contact him (brent) when steve had some free time. but seeing as how brent has moved on i'll pm you when the time comes.
Brian, you said your heads outpowered afr, do you have a compairison of the 2? and what were the compression ratios and head gaskets, and was this on the same car same set up? not looking for fights or anything just really looking to get info to compair for my own sake. budchevy358@yahoo.com is my email address if you would like to send it to me so we dont steal this guys thread.
Originally Posted by Brian Tooley
JRP......Our LS6 Stg 2.5 have outpowered the AFR 205 heads by 20 RWHP, our 5.3 heads consistently make 440 RWHP and our new Stg 1 5.7 head just made 451 RWHP, more to come on this. As for PDD, don't forget that he pulled off PP heads and installed AFR 205' and Fast 90/90 and picked up 20 RWHP TOTAL!!
When can I send you one of our heads to flow test, since you have never had the oportunity to do so. Please don't forget, TEA is under new ownership and our quality and performance have never been better.
When can I send you one of our heads to flow test, since you have never had the oportunity to do so. Please don't forget, TEA is under new ownership and our quality and performance have never been better.
AFR 225 should get the job done. The hell with 205s now
