Street engine
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Street engine
I have a 351m motor that I would like to do with a street motor
crankshaft ford 400
pistons .030
edelblock intake manifold
holley 800 carburetor
crower camshaft 15242
exhaust manifolds
edelblock valve springs
What advice do you give me when assembling this engine?
When putting a modified camshaft do you need to arm it with degrees?
crankshaft ford 400
pistons .030
edelblock intake manifold
holley 800 carburetor
crower camshaft 15242
exhaust manifolds
edelblock valve springs
What advice do you give me when assembling this engine?
When putting a modified camshaft do you need to arm it with degrees?
Super Moderator
Joined: Apr 2004
Posts: 34,520
Likes: 2,826
You need to get the right piston to get some compression. That cam's writeup says they want 9.5 to 10.5 CR. As for springs, get the ones the cam maker recommends.
https://www.crower.com/camshafts/for...m-280-hdp.html
You going to run stock manifolds? OK, but you leave some power behind.
You don't need an 800 CFM carb. At 6000 RPM (Add ARP fasteners to your list) at 100% volumetric efficiency, a 400 will pull 695 CFM. At a more realistic 85% VE, 590 CFM.
Calculate the size of carburetor based on specific engine size and RPM
You could run a 650 CFM and be OK, 750 if you have to. The 650 will be better on the street. Vacuum secondaries BTW.
Intake manifold--which model? You may be happier with a dual plane on the street.
This guy sells pistons that will give you your compression. Lots of info here too.
https://www.tmeyerinc.com/engine-builds/
https://www.tmeyerinc.com/product/piston-set-ford-400/
https://www.crower.com/camshafts/for...m-280-hdp.html
You going to run stock manifolds? OK, but you leave some power behind.
You don't need an 800 CFM carb. At 6000 RPM (Add ARP fasteners to your list) at 100% volumetric efficiency, a 400 will pull 695 CFM. At a more realistic 85% VE, 590 CFM.
Calculate the size of carburetor based on specific engine size and RPM
You could run a 650 CFM and be OK, 750 if you have to. The 650 will be better on the street. Vacuum secondaries BTW.
Intake manifold--which model? You may be happier with a dual plane on the street.
This guy sells pistons that will give you your compression. Lots of info here too.
https://www.tmeyerinc.com/engine-builds/
https://www.tmeyerinc.com/product/piston-set-ford-400/
Laughing Gas
Joined: Aug 2010
Posts: 896
Likes: 55
From: Bothell
What 85e150 said /\
One thing to consider is don’t jump to .030 overbore right away. If you have to because of wear then sure but no reason to bore it any more than you need to. You might be able to get away with .010 or .020.
To get a 400 compression up it requires Tim’s pistons or some custom ones. But even with Tim’s pistons you’ll have no piston to head quench which helps reduce octane requirements. The only way to get that is to change heads. Not saying you have to but might be something you want to look into. Head options with quench are aftermarket aluminum, Cleveland 4v or Aussie 2v heads.
One thing to consider is don’t jump to .030 overbore right away. If you have to because of wear then sure but no reason to bore it any more than you need to. You might be able to get away with .010 or .020.
To get a 400 compression up it requires Tim’s pistons or some custom ones. But even with Tim’s pistons you’ll have no piston to head quench which helps reduce octane requirements. The only way to get that is to change heads. Not saying you have to but might be something you want to look into. Head options with quench are aftermarket aluminum, Cleveland 4v or Aussie 2v heads.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
You need to get the right piston to get some compression. That cam's writeup says they want 9.5 to 10.5 CR. As for springs, get the ones the cam maker recommends.
https://www.crower.com/camshafts/for...m-280-hdp.html
You going to run stock manifolds? OK, but you leave some power behind.
You don't need an 800 CFM carb. At 6000 RPM (Add ARP fasteners to your list) at 100% volumetric efficiency, a 400 will pull 695 CFM. At a more realistic 85% VE, 590 CFM.
Calculate the size of carburetor based on specific engine size and RPM
You could run a 650 CFM and be OK, 750 if you have to. The 650 will be better on the street. Vacuum secondaries BTW.
Intake manifold--which model? You may be happier with a dual plane on the street.
This guy sells pistons that will give you your compression. Lots of info here too.
https://www.tmeyerinc.com/engine-builds/
https://www.tmeyerinc.com/product/piston-set-ford-400/
https://www.crower.com/camshafts/for...m-280-hdp.html
You going to run stock manifolds? OK, but you leave some power behind.
You don't need an 800 CFM carb. At 6000 RPM (Add ARP fasteners to your list) at 100% volumetric efficiency, a 400 will pull 695 CFM. At a more realistic 85% VE, 590 CFM.
Calculate the size of carburetor based on specific engine size and RPM
You could run a 650 CFM and be OK, 750 if you have to. The 650 will be better on the street. Vacuum secondaries BTW.
Intake manifold--which model? You may be happier with a dual plane on the street.
This guy sells pistons that will give you your compression. Lots of info here too.
https://www.tmeyerinc.com/engine-builds/
https://www.tmeyerinc.com/product/piston-set-ford-400/
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