Iron VS Aluminum heads
02-11-2016 | 10:13 PM
#172
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Joined: Apr 2006
Posts: 10,042
Likes: 712
From: Toledo Oh
Why you gotta be so big headed??? I am building a 489 so Im looking for something a little smaller.... Thanks though...
02-12-2016 | 06:51 AM
#174
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Joined: Apr 2006
Posts: 10,042
Likes: 712
From: Toledo Oh
Allready have a pair.....
02-12-2016 | 01:49 PM
#177
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Joined: Jan 2006
Posts: 3,860
Likes: 793
From: St. Pete Beach, FL
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.
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.
02-18-2016 | 07:47 AM
#178
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
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.
02-18-2016 | 08:09 AM
#179
Registered
Joined: Oct 2010
Posts: 922
Likes: 128
From: Hemlock, MI
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.
02-18-2016 | 08:19 AM
#180
Frank's Marine Service
Joined: Sep 2002
Posts: 11,959
Likes: 142
From: Elkton, MD
Thanks for the info! I'm expecting this build to be around 500/525hp.
