a quick 400 question
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From: Munger
a quick 400 question
I got a quick question I've dome some research and have read a few threads. I was just wondering about how much HP would my 400 be putting out if I ran headers weiand intake and either a holly 600cfm or edelbrock thunder series 600cfm I'm debating on cam if I really want to tear in to it
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Two things kill power in a stock 400.
Low compression--fixable only with different pistons
Cam--fixable with a new cam and perhaps springs etc.
More:
351M/400 Performance Build Up
Bubba's M-Block Ford V8 Workshop
M-Block 351M/400 Parts Reference
Source for parts, especially pistons:
Ford 400
As for 300 hp, you will not get that with cam alone.
Low compression--fixable only with different pistons
Cam--fixable with a new cam and perhaps springs etc.
More:
351M/400 Performance Build Up
Bubba's M-Block Ford V8 Workshop
M-Block 351M/400 Parts Reference
Source for parts, especially pistons:
Ford 400
As for 300 hp, you will not get that with cam alone.
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From: Munger
I realize cam alone won't archive that I was saying a combo of 4bbl intake and good carb setup and headers would archive it
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Horsepower = Torque x RPM.
To get more HP, all you need to do is to increase the RPM of the motor. Unfortunately most things that increase the RPM of the motor kill the torque. The worst culprit is the cam.
Torque is the result of volumetric efficiency and dynamic compression ratio. High RPM cams kill the dynamic compression ratio.
To use a high RPM cam you must first increase the static compression ratio, so the dynamic compression ratio is in the right area for the fuel that you are using.
You can increase the static compression ratio by changing pistons or heads.
A good intake manifold and headers, along with a conservative high lift cam is all that you can do without tearing the engine down. This is especially true on a 335 series motor because of the piston-down-the-hole problem. Even changing the heads without changing pistons won't produce a great benefit.
To get more HP, all you need to do is to increase the RPM of the motor. Unfortunately most things that increase the RPM of the motor kill the torque. The worst culprit is the cam.
Torque is the result of volumetric efficiency and dynamic compression ratio. High RPM cams kill the dynamic compression ratio.
To use a high RPM cam you must first increase the static compression ratio, so the dynamic compression ratio is in the right area for the fuel that you are using.
You can increase the static compression ratio by changing pistons or heads.
A good intake manifold and headers, along with a conservative high lift cam is all that you can do without tearing the engine down. This is especially true on a 335 series motor because of the piston-down-the-hole problem. Even changing the heads without changing pistons won't produce a great benefit.
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From: Munger
I keep thinking it wrong I want to get at least 250 HP and I want neck snapping torque thanks for clearing my mistake. I just want to make my 77 project turn heads when I stomp the throttle it'll be mostly a weekend driver and mabey see a mud puddle or 2
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From: Delaware
It's hard to get what you want with bolt-on goodies. Your need to increase the compression first. A set of Aussie heads will help, but pistons & heads are the best options. A supercharger is another option.
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From: Delaware
Start with a manifold, headers & a carb, if you are on a budget. That will get you some performance improvement, skip the cam until you can afford a serious upgrade.