Edelbrock Marine Heads
 

How do they compare to the AFT full cnc or the Dart Pro 1?

Re: Edelbrock Marine Heads
 

Is anybody using the Edelbrocks?? I was looking at them for my blown 502's. Does anybody have any flow numbers on these heads??

Re: Edelbrock Marine Heads
 

From what I saw on the flow bench several years ago, you're compareing a VW to a Cadillac. Find a good shop with real numbers then compare.

Re: Edelbrock Marine Heads
 

More like a SS camro to a Yenko. Both will run, just one is built to "really" run.

Chris

Re: Edelbrock Marine Heads
 

So if they are so bad, why are people spending $20K+ on 525efi's - don't they have the same heads? I hear of 525's making 540hp on the dyno and they only have 8.75:1 compression on 87 octane.

Seems like they are simply a GM 502ho short block$4500, $1500 heads, $3500 exhaust, $4500 for accesories. $10K overpriced?? One could build a HIGH quality 540 for $20K Crower, Dart, AFR, etc.

Re: Edelbrock Marine Heads
 

John,
Below is a package that will run around $5500 to install on a base 502 carb engine.
502cid - 100% stock short block other than min. deck cut to make flat
8.8 compression. Did not zero deck - pistons .012" down + .040" headgasket
850 Sea Demon 82P 90S
HVH 1" Super Sucker
HV/Brodix 2000 Intake
Canfield 310 heads / CNC Chamber / No Port Work
Cam - custom Hyd Roller Just under 225 at .050 I w/112LSA

2" Primary Schoenfield Headers - dyno mufflers
Will test Gill Exhaust again when done testing in this state

Belt driven Sea Water pump working - cross over - alternator working - no PS pump.

89 octane fuel - yep, Winter Blend right from the gas pump.

35 Degrees total timing - HEI external coil distributor ( yes, the computer one) with Jacobs amplifier/coil

RPM HP Torque
2100 194.3 483.8
2200 206.6 495.67
2300 217.5 498.52
2400 231.0 505.70
2500 243.9 512.60
2600 256.8 519.00
2700 269.2 523.36
2800 279.9 524.64
2900 288.2 521.78
3000 295.2 516.70
3100 302.8 513.17
3200 312.2 512.08
3300 323.2 514.40
3400 336.7 519.97
3500 351.9 527.69
3600 374.4 542.69
3700 387.9 550.14
3800 406.6 562.41
3900 424.7 572.21
4000 440.7 578.35
4100 457.4 584.13
4200 468.2 586.44
4300 480.3 586.50
4400 490.9 585.93
4500 500.4 583.75
4600 508.8 580.29
4700 515.1 576.90
4800 526.3 575.77
4900 531.4 569.77
5000 536.0 563.20
5100 540.2 556.26
5200 540.9 546.34

Re: Edelbrock Marine Heads
 

50-75hp increase on a hp500efi on a $1500 budget.

Re: Edelbrock Marine Heads
 

John,
Cam and bowl work on what you have will get you that increase.
Chris

Re: Edelbrock Marine Heads
 

Switching from the iron gm heads to edelbrock rect port should net you 70hp/80tq at 5000rpm. Great investment for $1,500. Plus you will have all new good valves and springs. I run these heads and think they are the best choice for shoestring budget guys like me that only want to make 500-550 hp. If this is you, go for it. I would leave the cam alone for now.

BT :cool:

Re: Edelbrock Marine Heads
 

Where can you purchase Edelbrock Marine heads for $1,500? The cheapist I have seen was Summit for $1,500 with valves only.