more hp
12-25-2012, 10:53 PM
#11
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fixx
spend the extra money and have bob madera make the cam and have opel do the machining and assembly then dyno the engine..they also hace a cnc which most places dont..
http://www.opelengineering.com/
Last edited by FIXX; 12-25-2012 at 10:56 PM.
12-26-2012, 06:57 PM
#12
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I can tell you how to spend a ton of money on 420's 
I will say I spent the core money on parts that I could use on further builds. Buy it once and buy it right.
I refreshed my 420's with JE/SRP pistons, new ported aluminum Dart heads, best valves and springs. Most of my money is in my heads. But the heads have been on my 454's to blown 572's. After building the 454's to to their max I am now stepping over to the dark side. (positive displacement pumps on top of intake manifolds) Just do a cam swap and bolt on the blowers.
So in short what I am saying is build it with the future in mind. You will get bored with 525 soon.
I will say I spent the core money on parts that I could use on further builds. Buy it once and buy it right.
I refreshed my 420's with JE/SRP pistons, new ported aluminum Dart heads, best valves and springs. Most of my money is in my heads. But the heads have been on my 454's to blown 572's. After building the 454's to to their max I am now stepping over to the dark side. (positive displacement pumps on top of intake manifolds) Just do a cam swap and bolt on the blowers.
So in short what I am saying is build it with the future in mind. You will get bored with 525 soon.
12-26-2012, 07:47 PM
#13
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I can tell you how to spend a ton of money on 420's
I will say I spent the core money on parts that I could use on further builds. Buy it once and buy it right.
I refreshed my 420's with JE/SRP pistons, new ported aluminum Dart heads, best valves and springs. Most of my money is in my heads. But the heads have been on my 454's to blown 572's. After building the 454's to to their max I am now stepping over to the dark side. (positive displacement pumps on top of intake manifolds) Just do a cam swap and bolt on the blowers.
So in short what I am saying is build it with the future in mind. You will get bored with 525 soon.
I will say I spent the core money on parts that I could use on further builds. Buy it once and buy it right.
I refreshed my 420's with JE/SRP pistons, new ported aluminum Dart heads, best valves and springs. Most of my money is in my heads. But the heads have been on my 454's to blown 572's. After building the 454's to to their max I am now stepping over to the dark side. (positive displacement pumps on top of intake manifolds) Just do a cam swap and bolt on the blowers.
So in short what I am saying is build it with the future in mind. You will get bored with 525 soon.
But at 500 hours, I'd be getting serious about what you wanna do with that engine.
12-26-2012, 08:14 PM
#14
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525 hp at flywheel or prop?
My buddy redid his merc 400 cyclones in his mistress last season, with stock heads, cam was 236/243 duration, around .575 lift, dual plane Edelbrock RPM intake and stainless marine exhaust with 800 holleys, made 521 hp @5300 I forget the torque nbumber but it was pretty good too, I thought it did well for stock head engine at lower RPM's
My buddy redid his merc 400 cyclones in his mistress last season, with stock heads, cam was 236/243 duration, around .575 lift, dual plane Edelbrock RPM intake and stainless marine exhaust with 800 holleys, made 521 hp @5300 I forget the torque nbumber but it was pretty good too, I thought it did well for stock head engine at lower RPM's
12-26-2012, 08:45 PM
#15
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12-27-2012, 10:37 AM
#17
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525 hp at flywheel or prop?
My buddy redid his merc 400 cyclones in his mistress last season, with stock heads, cam was 236/243 duration, around .575 lift, dual plane Edelbrock RPM intake and stainless marine exhaust with 800 holleys, made 521 hp @5300 I forget the torque nbumber but it was pretty good too, I thought it did well for stock head engine at lower RPM's
My buddy redid his merc 400 cyclones in his mistress last season, with stock heads, cam was 236/243 duration, around .575 lift, dual plane Edelbrock RPM intake and stainless marine exhaust with 800 holleys, made 521 hp @5300 I forget the torque nbumber but it was pretty good too, I thought it did well for stock head engine at lower RPM's
12-27-2012, 06:59 PM
#18
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Flat tappet Edelbrock RPM cam, I will see if I can find grind number...
We both have Mistress's and mine has stock 420 cams still with Merlin heads and Single plane intakes, we are with 1 mph of each other, I may do more cam this winter thinking there is a decent gain there, mine are also 460CI 8.4:1 so I wanna add a point of compression too...have abest of 65 on gps so farboats heavy as fuk..
We both have Mistress's and mine has stock 420 cams still with Merlin heads and Single plane intakes, we are with 1 mph of each other, I may do more cam this winter thinking there is a decent gain there, mine are also 460CI 8.4:1 so I wanna add a point of compression too...have abest of 65 on gps so farboats heavy as fuk..
12-27-2012, 07:55 PM
#19
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Flat tappet Edelbrock RPM cam, I will see if I can find grind number...
We both have Mistress's and mine has stock 420 cams still with Merlin heads and Single plane intakes, we are with 1 mph of each other, I may do more cam this winter thinking there is a decent gain there, mine are also 460CI 8.4:1 so I wanna add a point of compression too...have abest of 65 on gps so farboats heavy as fuk..
We both have Mistress's and mine has stock 420 cams still with Merlin heads and Single plane intakes, we are with 1 mph of each other, I may do more cam this winter thinking there is a decent gain there, mine are also 460CI 8.4:1 so I wanna add a point of compression too...have abest of 65 on gps so farboats heavy as fuk..
