Out Of the Box AFR 205's
12-04-2008, 01:09 PM
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Out Of the Box AFR 205's I have a used (new VJ) set of 66cc 205's and will be running a 224 or 228 cam in a full bolt on 2002 M6 car. Is there anything I can or should do to them before I bolt them on?
12-04-2008, 09:40 PM
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The only things I've heard of is milling the heads for more compression or having Tony Mamo at AFR do a little more port work... other than that their good to go.
12-05-2008, 05:20 AM
#5
Mill them so the chamber is 62 (0.024" I believe). Make sure the surface finish is good and verify that the shop who mills them can produce an adequate Ra finish for using Cometics. Then use Cometic 0.040" gaskets with a kight dusting of Hylomar. For reference, my AFR 205's that were milled at AFR came in with an average 25 Ra finish, well below the 50 Ra required by Cometic and they were flat within 0.001" in both directions.
12-05-2008, 05:33 AM
#6
Mill them so the chamber is 62 (0.024" I believe). Make sure the surface finish is good and verify that the shop who mills them can produce an adequate Ra finish for using Cometics. Then use Cometic 0.040" gaskets with a kight dusting of Hylomar. For reference, my AFR 205's that were milled at AFR came in with an average 25 Ra finish, well below the 50 Ra required by Cometic and they were flat within 0.001" in both directions.
12-05-2008, 06:11 AM
#7
Great Question!
I bought and installed my set of AFR 205 heads two years ago and along with my cam and setup, the heads have been running strong!
That brings us to now...since the car is in winter storage, i of course cant leave it alone. So I called Tony just the other day to go over having him port these heads, as well as some milling.
So yeah, the heads do perform great right out of the box, but if you have the time and a few extra dollars to spend right now, milling & porting wouldnt be a bad idea.
I bought and installed my set of AFR 205 heads two years ago and along with my cam and setup, the heads have been running strong!
That brings us to now...since the car is in winter storage, i of course cant leave it alone. So I called Tony just the other day to go over having him port these heads, as well as some milling.
So yeah, the heads do perform great right out of the box, but if you have the time and a few extra dollars to spend right now, milling & porting wouldnt be a bad idea.
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12-05-2008, 12:51 PM
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Great Question!
I bought and installed my set of AFR 205 heads two years ago and along with my cam and setup, the heads have been running strong!
That brings us to now...since the car is in winter storage, i of course cant leave it alone. So I called Tony just the other day to go over having him port these heads, as well as some milling.
So yeah, the heads do perform great right out of the box, but if you have the time and a few extra dollars to spend right now, milling & porting wouldnt be a bad idea.
I bought and installed my set of AFR 205 heads two years ago and along with my cam and setup, the heads have been running strong!
That brings us to now...since the car is in winter storage, i of course cant leave it alone. So I called Tony just the other day to go over having him port these heads, as well as some milling.
So yeah, the heads do perform great right out of the box, but if you have the time and a few extra dollars to spend right now, milling & porting wouldnt be a bad idea.
12-05-2008, 01:59 PM
#10
He doesn't really touch the port, he works the chamber and unshrouds the valves for more flow. Two things to consider and you need to speak directly with Tony. He removes about 2 cc of material, therefore to get back compression you need to mill another 0.012", which "may" introduce PTV issues depending on your cam. I am running the 6016 AFR and the PTV was a squeaker, and I spent several hours degreeing the cam and measuring PTV. This approach will yield nice results, but you MUST be willing to invest the time and money for tools and an adjustable timing set to really set things up correctly. Secondly, if you are already cammed and it is larger than 224 intake, then flycutting may be in order. As I stated, best to contact Tony directly and discuss with him.
12-05-2008, 02:05 PM
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He doesn't really touch the port, he works the chamber and unshrouds the valves for more flow. Two things to consider and you need to speak directly with Tony. He removes about 2 cc of material, therefore to get back compression you need to mill another 0.012", which "may" introduce PTV issues depending on your cam. I am running the 6016 AFR and the PTV was a squeaker, and I spent several hours degreeing the cam and measuring PTV. This approach will yield nice results, but you MUST be willing to invest the time and money for tools and an adjustable timing set to really set things up correctly. Secondly, if you are already cammed and it is larger than 224 intake, then flycutting may be in order. As I stated, best to contact Tony directly and discuss with him.
12-05-2008, 03:04 PM
#12
My engine is a 383 stroker, using JE pistons already cut for extra PTV clearances. The cam is AFR's 234/238 version.
12-06-2008, 12:38 PM
#14
I am running the AFR 6016 cam (224/228) and it has a slight chop at idle.
12-07-2008, 05:05 PM
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The combo responds like a terror at pretty much any RPM from idle up to 6,500 RPM. There is absolutely no power lag anywhere. Dyno numbers for me are somewhat irrelevant as there were unfortunately too many variables from my last dyno to figure out the gain. Last dyno was on a Dynojet, this was a Mustang (same tuner though). I also installed lower gears, a new clutch and heavier differential fluid (plus it was cold out so I think the differential fluid was thick). The tune is laid in perfect so I am going to re-dyno for numbers only next spring when it warms back up. We did compare the dyno curve of a stock f-body with a cat back and CAI, with my car and even with my 3.90 gears I was 120 hp over the stock f-body if that helps. This was on the same Mustang dyno, which is relatively new to my tuner so he didn't have a lot of curves we could pull up. I was also much higher than an 08 Corvette with the LS3.
I am running the AFR 6016 cam (224/228) and it has a slight chop at idle.
I am running the AFR 6016 cam (224/228) and it has a slight chop at idle.
