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post #1 of 4 (permalink) Old 06-24-11, 09:57 PM Thread Starter
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increasing horsepower

I am almost done tearing down my 351W. All I have left is to take the crank, rods, pistons, and main bearings out so I'm starting to do some heavy research of ways to increase horsepower and stay within a budget at the same time. After getting down to the block, I can see that the motor is not in bad shape at all. Therefore, I want to keep the block stock and just build up the top end. Other than having a machinist port the stock heads, what else can I have done to increase horsepower? Possibly the intake ported?

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post #2 of 4 (permalink) Old 07-17-11, 10:44 AM
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Re: increasing horsepower

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Originally Posted by hunnerdean View Post
I am almost done tearing down my 351W. All I have left is to take the crank, rods, pistons, and main bearings out so I'm starting to do some heavy research of ways to increase horsepower and stay within a budget at the same time. After getting down to the block, I can see that the motor is not in bad shape at all. Therefore, I want to keep the block stock and just build up the top end. Other than having a machinist port the stock heads, what else can I have done to increase horsepower? Possibly the intake ported?
A change of cam to a little bigger one is usually the esiest way to up the HP, or an increase in C/R along with a bit bigger cam. An aftermarket timing set dialed in slightly advanced, vs OEM slighly retarded, helps. Porting might or might not help depending on knowledge & expierience of the porter. Sometimes hogging out can cause loss of port velocity if done excessively & be counterproductive. If heads are ported the intake will need to be port matched to them. A new intake can help, but probably not a huge amount on a stock engine. Something like an Edelbrock Performer RPM or Air-Gap, but don't get one that is for high RPM use, they don't do as well on the street
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post #3 of 4 (permalink) Old 07-21-11, 11:18 AM Thread Starter
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Re: increasing horsepower

I'm using the stock heads for the rebuild and I'm looking at the Edelbrock Performer Air-Gap manifold for 1500-6500 rpm, but will this intake bolt directly on with stock heads? The motor is an 84.
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post #4 of 4 (permalink) Old 07-21-11, 01:31 PM
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Re: increasing horsepower

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Originally Posted by hunnerdean View Post
I'm using the stock heads for the rebuild and I'm looking at the Edelbrock Performer Air-Gap manifold for 1500-6500 rpm, but will this intake bolt directly on with stock heads? The motor is an 84.
Shouldn't be a problem.
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