Iron VS Aluminum heads
SubscribeGimme Fuel
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I have a 50 hour set of AFR 335cc full Cnc I will be selling if that piques your interest.....Originally Posted by phragle
So much for wondering if you had a decent set of older alum heads you werent going to use for sale cheap.... lol
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I have some peanut port heads in the back of my truck for ballast while plowing.need a pair.Originally Posted by phragle
Why you gotta be so big headed??? I am building a 489 so Im looking for something a little smaller.... Thanks though...
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I think I have a can of aluminum paint. I can "convert" a set of these 575 heads to aluminum if you want.Originally Posted by phragle
So much for wondering if you had a decent set of older alum heads you werent going to use for sale cheap.... lol
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I know, I usually have a hard time fitting through doorways. HahaOriginally Posted by phragle
Why you gotta be so big headed??? I am building a 489 so Im looking for something a little smaller.... Thanks though...
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I was going with Dart IE 308's, but even through Atech, I couldn't beat the price on these heads. My last personal motor had a set of 308 Iron Eagles worked over by Jim Valako and they made killer power. These will have boost to help thing along though.
That things gonna flyOriginally Posted by wfo1
They are going on a pair of 575's in my Velocity that I tore down for no good reason. They looked great inside, but the boat was new to me and I wanted to know what I had. In the end I know I will have bigger cams, bigger blowers and better heads and fresh bottom ends. I was going with Dart IE 308's, but even through Atech, I couldn't beat the price on these heads. My last personal motor had a set of 308 Iron Eagles worked over by Jim Valako and they made killer power. These will have boost to help thing along though.
After doing a lot of research I think I'm leaning away from the EQ heads for this build and I'll state the reasons why.
First, it has nothing to do with the quality of the head. From what I'm reading and hearing they're a good head.
However, I don't think the head is going to meet the needs of my build primarily because the intake runner is too large (320 cc). I'm building a 509" MPI engine and there is a lot of restriction in the throttle body and more importantly the intake manifold. With a 320 CC intake running, it's probably going to have most of it's power gains above 5000 rpms and this engine is going to be a 5200+/- engine.
EQ also makes a replacement GM head but looking at the spec sheet, there's no real advantage (in my opinion) of going with that head because it doesn't have a rolled valve angle, raised exhaust port, upgraded valve seats or bronze guides for example. So even though it's cheaper, it doesn't meet my needs.
I feel that I need to put a head on this package which has a smaller intake runner such as the Edlebrock Performer RPM, Victor Jr, AFR 290 or largest port being the Dart Iron Eagle 308 CNC.
First, it has nothing to do with the quality of the head. From what I'm reading and hearing they're a good head.
However, I don't think the head is going to meet the needs of my build primarily because the intake runner is too large (320 cc). I'm building a 509" MPI engine and there is a lot of restriction in the throttle body and more importantly the intake manifold. With a 320 CC intake running, it's probably going to have most of it's power gains above 5000 rpms and this engine is going to be a 5200+/- engine.
EQ also makes a replacement GM head but looking at the spec sheet, there's no real advantage (in my opinion) of going with that head because it doesn't have a rolled valve angle, raised exhaust port, upgraded valve seats or bronze guides for example. So even though it's cheaper, it doesn't meet my needs.
I feel that I need to put a head on this package which has a smaller intake runner such as the Edlebrock Performer RPM, Victor Jr, AFR 290 or largest port being the Dart Iron Eagle 308 CNC.
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First, it has nothing to do with the quality of the head. From what I'm reading and hearing they're a good head.
However, I don't think the head is going to meet the needs of my build primarily because the intake runner is too large (320 cc). I'm building a 509" MPI engine and there is a lot of restriction in the throttle body and more importantly the intake manifold. With a 320 CC intake running, it's probably going to have most of it's power gains above 5000 rpms and this engine is going to be a 5200+/- engine.
EQ also makes a replacement GM head but looking at the spec sheet, there's no real advantage (in my opinion) of going with that head because it doesn't have a rolled valve angle, raised exhaust port, upgraded valve seats or bronze guides for example. So even though it's cheaper, it doesn't meet my needs.
I feel that I need to put a head on this package which has a smaller intake runner such as the Edlebrock Performer RPM, Victor Jr, AFR 290 or largest port being the Dart Iron Eagle 308 CNC.
I ran a Dart 308 Iron Eagle on my old 540 MPI build. Ports were still much larger than the MPI intake runners even after extrude honing. Engine had fantastic low end torque and was a runner. Was around 600 hp but major intake mods and .610 lift cam.Originally Posted by Panther
After doing a lot of research I think I'm leaning away from the EQ heads for this build and I'll state the reasons why. First, it has nothing to do with the quality of the head. From what I'm reading and hearing they're a good head.
However, I don't think the head is going to meet the needs of my build primarily because the intake runner is too large (320 cc). I'm building a 509" MPI engine and there is a lot of restriction in the throttle body and more importantly the intake manifold. With a 320 CC intake running, it's probably going to have most of it's power gains above 5000 rpms and this engine is going to be a 5200+/- engine.
EQ also makes a replacement GM head but looking at the spec sheet, there's no real advantage (in my opinion) of going with that head because it doesn't have a rolled valve angle, raised exhaust port, upgraded valve seats or bronze guides for example. So even though it's cheaper, it doesn't meet my needs.
I feel that I need to put a head on this package which has a smaller intake runner such as the Edlebrock Performer RPM, Victor Jr, AFR 290 or largest port being the Dart Iron Eagle 308 CNC.
Quote:
Thanks for the info! I'm expecting this build to be around 500/525hp.Originally Posted by Gimme Fuel
I ran a Dart 308 Iron Eagle on my old 540 MPI build. Ports were still much larger than the MPI intake runners even after extrude honing. Engine had fantastic low end torque and was a runner. Was around 600 hp but major intake mods and .610 lift cam.
