AFR 205's or TEA's
02-26-2009, 05:31 PM
#4
I've owned both but I like the idea of a little more valve clearance with the Trick Flows because of the 13.5 deg. valve angle and another minor plus is that the pads for the valve cover bolts to screw into in the Trick Flows are flat and about 5/8 ths wide while AFR tapers their bolt holes almost to a cone. Makes it just a tad bit harder to find the threads for the valve cover bolt on the AFR's.
02-26-2009, 05:34 PM
#5
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trickflows are also a great choice.To me the trickflows and Afr's are the two best cylinder heads.I am not sure if the trickflows are a direct bolt on like the afr's,as in you may need different rockers to run them,but i am not sure on this,someone please help me out here.
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02-26-2009, 07:55 PM
#11
Do yourself a favor...ask people that have those heads. And whatever you do don't
just look at dyno numbers....Find out what people with those heads are running at the
track. Not sure what you intend to do with your car...all street or all track or alittle of both.
just look at dyno numbers....Find out what people with those heads are running at the
track. Not sure what you intend to do with your car...all street or all track or alittle of both.
02-26-2009, 08:22 PM
#14
Guys, I have trickflows. But, I wanted to pass along that the rocker recommendation isn't just for the trickflows period. The reason trickflow pushes that so much is because of the bronze valve guides. Bronze is a soft material compared to the valve material. Any head with bronze valve guides need a good roller rocker due to the wiping pattern on the top of the stem. The roller rocker does not make the stem of the valve want to move around as the angle changes during the valve stroke. The stock heads have a much harder material for the guide and can withstand the stem trying to move due to the rocker pressure on the top of the stem while the valve moves. Bottom line is any bronze valve guided head needs a roller tipped rocker or you will be replacing the guides in around 10,000 miles. I have set back and watched this discussion long enough and thought somebody needed to explain this so that everybody will truly understand what generates this recommendation. It is just a case of material wear and physics.
02-26-2009, 08:54 PM
#15
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i think its because none of them are totaly drag oriented, ill be getting the tfs on the car in a few months and be running a 11.7:1 so we'll see what i can muster up
-brandon
02-26-2009, 09:12 PM
#16
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Guys, I have trickflows. But, I wanted to pass along that the rocker recommendation isn't just for the trickflows period. The reason trickflow pushes that so much is because of the bronze valve guides. Bronze is a soft material compared to the valve material. Any head with bronze valve guides need a good roller rocker due to the wiping pattern on the top of the stem. The roller rocker does not make the stem of the valve want to move around as the angle changes during the valve stroke. The stock heads have a much harder material for the guide and can withstand the stem trying to move due to the rocker pressure on the top of the stem while the valve moves. Bottom line is any bronze valve guided head needs a roller tipped rocker or you will be replacing the guides in around 10,000 miles. I have set back and watched this discussion long enough and thought somebody needed to explain this so that everybody will truly understand what generates this recommendation. It is just a case of material wear and physics.
02-26-2009, 09:28 PM
#18
You do not need aftermarket rockers with AFR. It's not a "recommendation"...you can't use the stock rockers with TFS heads since they have different valvetrain geometry due to the 13.5 intake valve angle.
Last edited by GTO1_OHIO; 02-26-2009 at 09:35 PM.
Not that I don't believe you but I want some proof cause soon i'll be in the market for heads. My choice is AFR 205's but let me see what the TFS are working with. Hijack over.