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Discussion Starter · #1 ·
As the headline says. What is the best low end torque intake? What I have now is a D6VE Spread bore intake. I want an intake that will give good low end torque from idle to around 3500 RPM. I'm using this on my dually 460. The goal of this motor will be to get good low end torque & maximum MPG's. It doesn't matter whether it's Aluminum or cast. I've found intake dyno test for small blocks but can't find one for big blocks. Do's anybody know if anybody has ever done a dyno test for big block intakes? I'm going to be using a stock Holley carb on this setup.
 

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X2. The stock type intake is the best down below the torque peak.
 

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Discussion Starter · #6 ·
With this being said. Would you'll use the spread bore stock intake I have now or try & find a stock square bore?
 

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As the headline says. What is the best low end torque intake? What I have now is a D6VE Spread bore intake. I want an intake that will give good low end torque from idle to around 3500 RPM. I'm using this on my dually 460. The goal of this motor will be to get good low end torque & maximum MPG's. It doesn't matter whether it's Aluminum or cast. I've found intake dyno test for small blocks but can't find one for big blocks. Do's anybody know if anybody has ever done a dyno test for big block intakes? I'm going to be using a stock Holley carb on this setup.
Published dyno tests are run at wide open throttle anyway so, that is not a good indication of part throttle performance. The iron intake for the ThermoQuad with that carburetor will be your best part throttle performer.

Hard to find because it's not very common;
only used for some models in one year I think, (1974).
 

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Discussion Starter · #8 ·
So basically what I have is what's best!
 

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Ditto on the stocker for your app.

If you feel you just HAVE to make a change, the Edelbrock Performer would be the choice. It's basically an aluminum version of the stock intake. At the very least it'll save you a couple of pounds.

Brad
 

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Discussion Starter · #10 ·
How much weight would I save? Probably not enough to help on the weight of my dually. I'll probably just go wiith what I have & save the money for other things. I'll probably port the top end of it a little.
 

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Stick with the factory iron. Still much better than the Performer under the torque peak.
 

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I don't know of anyone who's tested big block intakes down super low but it would be quite interesting. I think that what's best would depend on the size of the engine. A stocker is probably as good or better than most after market intakes down very low, say 2500rpm on a 460 or smaller. But I'd say that if you made the engine larger, 521cid etc that you might find that very low rpm torque is actually better with a larger intake.

A few years ago I dyno tested my 460 and the torque peak was at only 2800rpm where it made 490lbs/ft. I dyno tested a 505 inch Chevy that I built for a truck down to 2500rpm and if I remember correctly it was making over 500lbs/ft down that low quite easily with an RPM air gap intake.

Most dynos with water brakes have a tough/impossible time loading any engine that makes over about 500lbs/ft at 2500rpm. They just aren't designed for that purpose.
 

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Discussion Starter · #14 ·
The purpose of this build is for maximum torque for towing my race car & to also get maximum gas mileage. I'll end up porting the plenum area. If everybody thinks the spread bore intake I have is the best for my purpose then that's what I'll use.
 
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