What are the best flowing heads for a 5.7?
05-07-2012, 01:41 PM
#41
AMP Racing
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Location: Washington TWP NJ
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2023 C5 of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11-'12
I never said AFR heads were junk. In fact, for a street application, they're probably a good choice.
My thought is, if your building a street application, then you are certainly not building a max effort engine. So, if that's the case, why spend a bunch of money on high dollar heads when a stock set of 243s with a little work done to them will work exceptionally well?
IMHO the only reason why anyone would buy high dollar heads for a street application is for dyno bragging rights. And that's fine, if that's what they want. To me, it seems like a waste of money.
My thought is, if your building a street application, then you are certainly not building a max effort engine. So, if that's the case, why spend a bunch of money on high dollar heads when a stock set of 243s with a little work done to them will work exceptionally well?
IMHO the only reason why anyone would buy high dollar heads for a street application is for dyno bragging rights. And that's fine, if that's what they want. To me, it seems like a waste of money.
Last edited by C5 Pete; 05-07-2012 at 01:43 PM.
05-07-2012, 04:46 PM
#42
Drifting
Member Since: Jan 2010
Location: Katy TX
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i never said afr heads were junk. In fact, for a street application, they're probably a good choice.
My thought is, if your building a street application, then you are certainly not building a max effort engine. So, if that's the case, why spend a bunch of money on high dollar heads when a stock set of 243s with a little work done to them will work exceptionally well?
Imho the only reason why anyone would buy high dollar heads for a street application is for dyno bragging rights. And that's fine, if that's what they want. To me, it seems like a waste of money.
My thought is, if your building a street application, then you are certainly not building a max effort engine. So, if that's the case, why spend a bunch of money on high dollar heads when a stock set of 243s with a little work done to them will work exceptionally well?
Imho the only reason why anyone would buy high dollar heads for a street application is for dyno bragging rights. And that's fine, if that's what they want. To me, it seems like a waste of money.
05-07-2012, 09:23 PM
#43
Well...........lots of great post made.
You stated that dyno#'s and making 400+ to the tire is what is important to you, so............this is my opinion, 243's can and are the best bang for the buck. In most builds, being all out or a conservative build the 243's are with in 10-15 rwhp of the aftermarket heads. And let it be known not all of the "aftermarket" heads can hold a candle to a set of 243's work by the right guy. Just because they are aftermarket does not mean the port, seat, throat, csa etc....are better than a set of worked 243's. A head is only as good as the creator/designer.
As stated earlier...243's and TFS own the 346" N/A records. IMHO, the TEA 243 is the best factory port job available (for the price), that being said TEA does TFS machining and custom work. And FYI they share the same building....
Just remember that peak flow numbers do not show the whole picture, coefficient of discharge and curtain area are the kings on the block. Average flow in a big factor as well as velocity and efficiency of the chamber to the bore size. The TEA 243 was specifically designed for a 3.898" bore and does very well doing so.
Here is a guy who made 495rwhp with a set of TEA 243's and a mild cam.......
http://ls1tech.com/forums/dynamomete...m-numbers.html
And the great thing is...you can actually talk to B.Tooley, the guy who created the port, chamber, seat..etc program for the TEA 243.
All this being said, you will need to factor in the cost of the 243's + the port work if you go that route. Sh*t, you may hit 400rwhp with 243's without port work.
Good luck with your project.......... What cam and manifold do you plan on running ??
Thanks............
You stated that dyno#'s and making 400+ to the tire is what is important to you, so............this is my opinion, 243's can and are the best bang for the buck. In most builds, being all out or a conservative build the 243's are with in 10-15 rwhp of the aftermarket heads. And let it be known not all of the "aftermarket" heads can hold a candle to a set of 243's work by the right guy. Just because they are aftermarket does not mean the port, seat, throat, csa etc....are better than a set of worked 243's. A head is only as good as the creator/designer.
As stated earlier...243's and TFS own the 346" N/A records. IMHO, the TEA 243 is the best factory port job available (for the price), that being said TEA does TFS machining and custom work. And FYI they share the same building....
Just remember that peak flow numbers do not show the whole picture, coefficient of discharge and curtain area are the kings on the block. Average flow in a big factor as well as velocity and efficiency of the chamber to the bore size. The TEA 243 was specifically designed for a 3.898" bore and does very well doing so.
Here is a guy who made 495rwhp with a set of TEA 243's and a mild cam.......
http://ls1tech.com/forums/dynamomete...m-numbers.html
And the great thing is...you can actually talk to B.Tooley, the guy who created the port, chamber, seat..etc program for the TEA 243.
All this being said, you will need to factor in the cost of the 243's + the port work if you go that route. Sh*t, you may hit 400rwhp with 243's without port work.
Good luck with your project..........
What cam and manifold do you plan on running ??Thanks............
05-07-2012, 11:21 PM
#44
Rass Claat Viper
Thread Starter
Well...........lots of great post made.
You stated that dyno#'s and making 400+ to the tire is what is important to you, so............this is my opinion, 243's can and are the best bang for the buck. In most builds, being all out or a conservative build the 243's are with in 10-15 rwhp of the aftermarket heads. And let it be known not all of the "aftermarket" heads can hold a candle to a set of 243's work by the right guy. Just because they are aftermarket does not mean the port, seat, throat, csa etc....are better than a set of worked 243's. A head is only as good as the creator/designer.
As stated earlier...243's and TFS own the 346" N/A records. IMHO, the TEA 243 is the best factory port job available (for the price), that being said TEA does TFS machining and custom work. And FYI they share the same building....
Just remember that peak flow numbers do not show the whole picture, coefficient of discharge and curtain area are the kings on the block. Average flow in a big factor as well as velocity and efficiency of the chamber to the bore size. The TEA 243 was specifically designed for a 3.898" bore and does very well doing so.
Here is a guy who made 495rwhp with a set of TEA 243's and a mild cam.......
http://ls1tech.com/forums/dynamomete...m-numbers.html
And the great thing is...you can actually talk to B.Tooley, the guy who created the port, chamber, seat..etc program for the TEA 243.
All this being said, you will need to factor in the cost of the 243's + the port work if you go that route. Sh*t, you may hit 400rwhp with 243's without port work.
Good luck with your project.......... What cam and manifold do you plan on running ??
Thanks............
You stated that dyno#'s and making 400+ to the tire is what is important to you, so............this is my opinion, 243's can and are the best bang for the buck. In most builds, being all out or a conservative build the 243's are with in 10-15 rwhp of the aftermarket heads. And let it be known not all of the "aftermarket" heads can hold a candle to a set of 243's work by the right guy. Just because they are aftermarket does not mean the port, seat, throat, csa etc....are better than a set of worked 243's. A head is only as good as the creator/designer.
As stated earlier...243's and TFS own the 346" N/A records. IMHO, the TEA 243 is the best factory port job available (for the price), that being said TEA does TFS machining and custom work. And FYI they share the same building....
Just remember that peak flow numbers do not show the whole picture, coefficient of discharge and curtain area are the kings on the block. Average flow in a big factor as well as velocity and efficiency of the chamber to the bore size. The TEA 243 was specifically designed for a 3.898" bore and does very well doing so.
Here is a guy who made 495rwhp with a set of TEA 243's and a mild cam.......
http://ls1tech.com/forums/dynamomete...m-numbers.html
And the great thing is...you can actually talk to B.Tooley, the guy who created the port, chamber, seat..etc program for the TEA 243.
All this being said, you will need to factor in the cost of the 243's + the port work if you go that route. Sh*t, you may hit 400rwhp with 243's without port work.
Good luck with your project..........
What cam and manifold do you plan on running ??Thanks............
Thanks for the awesome post man. I will certainly keep my eyes peeled for the 243's, they just seem like a win win move. The car presently has an LS6 intake and Texas Speed Torquer V2 cam. Definitely not my first choice but it came with the car...and took a lot of getting to used to...actually I am still not use to it. I think it inadvertently prompted me to write this post because I want heads and cam to match. Figure 400hp and a nice area under the curve will make for a pleasant car to drive and something that put me solidly in the 12's on factor 3.15's.
05-07-2012, 11:51 PM
#45
Burning Brakes
Thanks for the awesome post man. I will certainly keep my eyes peeled for the 243's, they just seem like a win win move. The car presently has an LS6 intake and Texas Speed Torquer V2 cam. Definitely not my first choice but it came with the car...and took a lot of getting to used to...actually I am still not use to it. I think it inadvertently prompted me to write this post because I want heads and cam to match. Figure 400hp and a nice area under the curve will make for a pleasant car to drive and something that put me solidly in the 12's on factor 3.15's.
05-08-2012, 12:20 AM
#46
Thanks............
12-08-2012, 11:30 PM
#50
Rass Claat Viper
Thread Starter
Thanks Huff, but I just missed a set for $350 shipped on this site a few days ago, so I am hoping my vigilance (initially, lack thereof) will pay off with a similar deal. Your price is damn fair however.
