weiand 8021 work on dove heads, without loosing power?

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weiand 8021 work on dove heads, without loosing power?

Post  77ford on January 26th 2014, 8:00 pm

I have dove heads not ported and an edelbrock performer now. I can get a weiand 8021 for free was wondering if this will work with my dove heads , this manifold i believe is for cj size ports. I would like to put the edelbrock on my other truck.

Will this work and not hurt power or should i wait and get the 8012?

This is in a 4x4 truck not a race car.
thanks.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  rmcomprandy on January 26th 2014, 11:11 pm

77ford wrote:I have dove heads not ported and an edelbrock performer now. I can get a weiand 8021 for free was wondering if this will work with my dove heads , this manifold i believe is for cj size ports. I would like to put the edelbrock on my other truck.

Will this work and not hurt power or should i wait and get the 8012?

This is in a 4x4 truck not a race car.
thanks.

Sure will NOT hurt, when run against the 8012...

As far as being better than the Performer, that would depend upon the rest of the build.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  jtmarten on January 27th 2014, 10:05 am

I think you'd end up with alot of unwanted turbulence due to the smaller head port.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  rmcomprandy on January 27th 2014, 11:22 am

jtmarten wrote:I think you'd end up with alot of unwanted turbulence due to the smaller head port.

That is what a lot of people proclaimed about the Ford Marine engines also, (Cobra Jet intake port size manifold with a regular port size head), but, matching the ports lost torque with no appreciable gain of horsepower.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  77ford on January 27th 2014, 7:27 pm

Thanks randy, i had heard also it wouldnt work due to port miss match.

The engine is .030 over rebuilt dove heads unknowen cam Told "rv" I am gonna replace cam with a bigger one this summer not sure yet what cam. It is a big 4x4 play toy street truck.

I have another truck i drive everyday 460 d3 heads sounds like a little cam .040 over was in truck when i bought it . Has stock intake i wanted to swap with the edelbrock.

So sounds like i can do this swap and not hurt power on either truck.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  rmcomprandy on January 27th 2014, 9:17 pm

77ford wrote:Thanks randy, i had heard also it wouldnt work due to port miss match.

The engine is .030 over rebuilt dove heads unknowen cam Told "rv" I am gonna replace cam with a bigger one this summer not sure yet what cam. It is a big 4x4 play toy street truck.

I have another truck i drive everyday 460 d3 heads sounds like a little cam .040 over was in truck when i bought it . Has stock intake i wanted to swap with the edelbrock.

So sounds like i can do this swap and not hurt power on either truck.

Keep the "Performer" for your application; maybe get a "Performer RPM"; (or FRPP equivalent).
A BETTER cam is a good idea along with a good carburetor.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  schmitty on January 27th 2014, 10:47 pm

Several years ago I did an SCJ intake swap on an unported C9 headed stock stroke deal. Seat of the pants-o-meter said it was a better deal than the Edelbrock Performer that was on it.
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Re: weiand 8021 work on dove heads, without loosing power?

Post  J.Toney on January 28th 2014, 1:19 pm

rmcomprandy wrote:
jtmarten wrote:I think you'd end up with alot of unwanted turbulence due to the smaller head port.

That is what a lot of people proclaimed about the Ford Marine engines also, (Cobra Jet intake port size manifold with a regular port size head), but, matching the ports lost torque with no appreciable gain of horsepower.

I read this same type if deal when I bought my first engine book about 15 years ago (I'm a hack, so that how I started learning.) the point was putting the CJ style intake on a std head didn't drop power, usually gained. Interesting when you see the mismatch.
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Re: weiand 8021 work on dove heads, without loosing power?

Post  supervel45 on January 28th 2014, 1:30 pm

schmitty wrote:Several years ago I did an SCJ intake swap on an unported C9 headed stock stroke deal.  Seat of the pants-o-meter said it was a better deal than the Edelbrock Performer that was on it.
This trick has been around since the CJ/SCJ intake was first made, almost. Cheap way to recycle when the cars where recked or owners upgraded intakes and did not want the leftover parts.

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Re: weiand 8021 work on dove heads, without loosing power?

Post  rmcomprandy on January 28th 2014, 1:32 pm

J.Toney wrote:
rmcomprandy wrote:
jtmarten wrote:I think you'd end up with alot of unwanted turbulence due to the smaller head port.

That is what a lot of people proclaimed about the Ford Marine engines also, (Cobra Jet intake port size manifold with a regular port size head), but, matching the ports lost torque with no appreciable gain of horsepower.

I read this same type if deal when I bought my first engine book about 15 years ago (I'm a hack, so that how I started learning.) the point was putting the CJ style intake on a std head didn't drop power, usually gained. Interesting when you see the mismatch.

To be honest MERCRUISER did the same thing with the Chevrolet big block engine putting a large rectangle port intake manifold on and engine with oval port heads and found the same scenario.
Supposedly, the large difference creates a 2nd sound wave throughout the intake tract, sorta like a "step header" in reverse.

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