Trying to make 450hp
09-23-2011 | 01:23 AM
#31
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From: Omaha/LOTO
09-23-2011 | 01:25 AM
#32
Charter Member # 55
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From: Omaha/LOTO
09-23-2011 | 06:38 AM
#33
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From: Deerfield BCH, FL
If you suspect running out of fuel, your spark plugs should tell the story.
Running these stock gm truck heads, your just not gonna make the power. A 454 is small enough by todays standards. To make power, you NEED to spin the engines. 4800, 4900, 5000 just ain't gonna do it.
Build them with cams, heads, intakes, and carbs that will support 5600-5800 and let them run. There is an abundance of cams, lifters, valvesprings, rockers, etc, that can support the additional rpm with no problems. Not that many options 25 years ago, so guys tried to make low rpm power reliably with oval ports truck heads, dual planes, etc.
Running these stock gm truck heads, your just not gonna make the power. A 454 is small enough by todays standards. To make power, you NEED to spin the engines. 4800, 4900, 5000 just ain't gonna do it.
Build them with cams, heads, intakes, and carbs that will support 5600-5800 and let them run. There is an abundance of cams, lifters, valvesprings, rockers, etc, that can support the additional rpm with no problems. Not that many options 25 years ago, so guys tried to make low rpm power reliably with oval ports truck heads, dual planes, etc.
At this point over the winter i could either have the head shop do the larger valves or find some merlin,dart heads and install all the guts.
09-23-2011 | 08:10 PM
#34
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From: OFallon,Mo.
Pantera, just curious what fuel pump are you running. You should at least be running something like this.
http://www.summitracing.com/parts/HLY-712-454-11/
http://www.summitracing.com/parts/HLY-712-454-11/
09-23-2011 | 10:00 PM
#35
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From: Deerfield BCH, FL
Jim, it's a fuel pump run of belt, and attached to water pump, I also have a old electric one that I can switch
On at helm when doing high speed runs, is there a certain electric pump i should run.
On at helm when doing high speed runs, is there a certain electric pump i should run.
09-24-2011 | 01:27 AM
#36
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From: OFallon,Mo.
I couldn't tell ya anything about the electric pumps.Never messed with them. Those pumps that run off the water pump, is there anything special about them or will any BB pump work. Have any idea of the specs of the pump that's on there now.
09-24-2011 | 01:16 PM
#38
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From: central NY
The fuel pump that bolts on a BB block, will not work on a sea water pump driven fuel pump. The arm on the fuel pump is different. Think you need to go after mnarket.
09-24-2011 | 03:31 PM
#39
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From: Grand Rapids, MI
I run Mallory 140GPH electric fuel pumps.
