The last dyno was 368rwhp 
AFR heads versus porting?
Thread Starter
Racer
Joined: Jan 2003
Posts: 360
Likes: 0
From: Sumter South Carolina
AFR heads versus porting?
Hey all, I've been researching the pros and cons of going with a head/cam package like what Lloyd Elliot offers versus AFR heads. One thing that seems to be a source of contention is whether the extra dollars for AFR heads is worth the hp. Elliot's stage II heads are advertised to produce 460 at the crank and the the F-body guys back that claim up. So, with a proper cam, will AFR heads produce more power? Or will they have to be ported? From what I know, it seems that the AFR heads have the potential to produce more power than ported LT1 heads. This package would be going on my current setup, which you can see in the signature.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
This thread will turn into a heated debate but IMO the AFR has better port design right outta the box, AND a sweet combusion chamber that the LT1 doesnt have. More efficient=more mpg and power.
Thread Starter
Racer
Joined: Jan 2003
Posts: 360
Likes: 0
From: Sumter South Carolina
I'm sure it will, and it is fun stiring the pot in the effort to gain more knowledge! I too have heard about the better port design, but that doesn't always mean more power out of the box. And to narrow this discussion, these horsepower comparisions should be based off of a stock bottem end.
Drifting
Joined: Jul 2007
Posts: 1,294
Likes: 37
Burning Brakes
Joined: May 2001
Posts: 895
Likes: 1
From: Austin TX
I'm sure it will, and it is fun stiring the pot in the effort to gain more knowledge! I too have heard about the better port design, but that doesn't always mean more power out of the box. And to narrow this discussion, these horsepower comparisions should be based off of a stock bottem end.
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Look at my signature, and that is with stock heads ported.
I believe John Mackey has the fastest stock bottom end LT1 on here and his is with LT1 heads. (ported)
Although I dont have the Lloyd Elliott package, from what I have seen, it is one of the best values for your dollar. Looking back, if I was going to do another NA stock bottom end motor, that is probably what I would use.
I believe John Mackey has the fastest stock bottom end LT1 on here and his is with LT1 heads. (ported)
Although I dont have the Lloyd Elliott package, from what I have seen, it is one of the best values for your dollar. Looking back, if I was going to do another NA stock bottom end motor, that is probably what I would use.
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Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
I took my AFR 210's to a local porting specialist and he did not want to port them. He "cleaned them up" and I got some low lift gain, primarily for undercutting the valves. Since the heads are CNC'd, he had no idea of how far he could go without hitting a water jacket and messing them up.
Supposedly the new AFR's are awesome, but other issues that concern me are,, does the plug angle work with anyone headers, and oil return. My older 210's plug angle were ridiculously close to the #4,6,5,7Hooker 2151 headers tubes.
I have not heard if the new AFR does or does or does not remedy these issues.
my .02
Supposedly the new AFR's are awesome, but other issues that concern me are,, does the plug angle work with anyone headers, and oil return. My older 210's plug angle were ridiculously close to the #4,6,5,7Hooker 2151 headers tubes.
I have not heard if the new AFR does or does or does not remedy these issues.
my .02
Thread Starter
Racer
Joined: Jan 2003
Posts: 360
Likes: 0
From: Sumter South Carolina
Price is not a factor in this decision, but to buy the AFRs and have them ported would be about a grand more than going with ported LT1 heads, so for that kind of money I think 10-15 hp would not be worth the extra $$. I'd just rather spend my money smartly. Now, if boost is in the future, I think lowering the compression with the AFRs would be good. Anyone here running the newly designed AFR heads? I do have the Hooker LTs, so it would be nice to know if the plugs will clear.
93 Ragtop, those are really fast 1/4 times. Are you running slicks for those numbers?
93 Ragtop, those are really fast 1/4 times. Are you running slicks for those numbers?
Instructor
Joined: Dec 2006
Posts: 139
Likes: 0
From: Deep in The Heart of Dixie
Thread Starter
Racer
Joined: Jan 2003
Posts: 360
Likes: 0
From: Sumter South Carolina
Alright, so I called a few of my hot-rod friends who run AFR heads. They said that AFR does not recommend porting their heads. They said they are ready to bolt on as is and any porting can mess with the flow. AFR also says they have the best flow numbers. So, now it comes down to the flow. Does anyone have flow numbers for ported LT1 heads versus AFR?
Melting Slicks
Joined: Jul 2004
Posts: 2,695
Likes: 0
From: Chicago Illinois
My ported 190 full cnc heads from www.advancedinduction.com
.300=202.2
.400=244.7
.500=268.9
.550=274.2
.600=275.1
I dont know what AFR out of the box flow but its probably close to my ported heads but they have so much more meat on them for even better flow #s. If you go with LE or any other porter they have matching cams for what there heads flow. On my set up with a very agressive small cam I make 365 rwhp and 350 tq. From my research the guys on f body forums produce higher #s for some reason then do the vettes with same mods. IMOP the LT1 heads are well worth porting unless your going with bigger cubes. I think you can get close to 300cfm out of LT1 heads
.300=202.2
.400=244.7
.500=268.9
.550=274.2
.600=275.1
I dont know what AFR out of the box flow but its probably close to my ported heads but they have so much more meat on them for even better flow #s. If you go with LE or any other porter they have matching cams for what there heads flow. On my set up with a very agressive small cam I make 365 rwhp and 350 tq. From my research the guys on f body forums produce higher #s for some reason then do the vettes with same mods. IMOP the LT1 heads are well worth porting unless your going with bigger cubes. I think you can get close to 300cfm out of LT1 heads
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
Race Director
Joined: Nov 2000
Posts: 17,103
Likes: 39
From: stop the fun suckers
My ported 190 full cnc heads from www.advancedinduction.com
.300=202.2
.400=244.7
.500=268.9
.550=274.2
.600=275.1
I dont know what AFR out of the box flow but its probably close to my ported heads but they have so much more meat on them for even better flow #s. If you go with LE or any other porter they have matching cams for what there heads flow. On my set up with a very agressive small cam I make 365 rwhp and 350 tq. From my research the guys on f body forums produce higher #s for some reason then do the vettes with same mods. IMOP the LT1 heads are well worth porting unless your going with bigger cubes. I think you can get close to 300cfm out of LT1 heads
.300=202.2
.400=244.7
.500=268.9
.550=274.2
.600=275.1
I dont know what AFR out of the box flow but its probably close to my ported heads but they have so much more meat on them for even better flow #s. If you go with LE or any other porter they have matching cams for what there heads flow. On my set up with a very agressive small cam I make 365 rwhp and 350 tq. From my research the guys on f body forums produce higher #s for some reason then do the vettes with same mods. IMOP the LT1 heads are well worth porting unless your going with bigger cubes. I think you can get close to 300cfm out of LT1 heads
thats a nice set of heads!!
Pro
Joined: May 2006
Posts: 549
Likes: 2
From: Bardstown ( Bourbon capitol of the world ) KY ( The Bluegrass state )
That was at the wheels. I bought a package deal. It came with the lt1 ported and polished heads and a cc306 cam, and my cousin ported and polished my intake. It cost $1200.
