Single plane on a street car??

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Princess Valiant

Princess Valiant

A.K.A. Rainy Day Auto
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I have a Holley street Dominator intake manifold that is a single plane (not sure if they all are)

I am not really familiar with aftermarket intakes as I have only run factory parts.

Is this a good manifold to use a street driven car?? The combo is a 340/4speed. the 340 is a 73 and mostly stock and is a good running original out of a 73 roadrunner.

The car it is going in is a 71 scamp
 
Rainy Day Auto said:
I have a Holley street Dominator intake manifold that is a single plain (not sure if they all are)

I am not really familiar with aftermarket intakes as I have only run factory parts.

Is this a good manifold to use a street driven car?? The combo is a 340/4speed. the 340 is a 73 and mostly stock and is a good running original out of a 73 roadrunner.

The car it is going in is a 71 scamp
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Stock 273's are single plane.. i would run what you have..
 
Rainy Day Auto said:
I have a Holley street Dominator intake manifold that is a single plain (not sure if they all are)

I am not really familiar with aftermarket intakes as I have only run factory parts.

Is this a good manifold to use a street driven car?? The combo is a 340/4speed. the 340 is a 73 and mostly stock and is a good running original out of a 73 roadrunner.

The car it is going in is a 71 scamp
Click to expand...
I Have the same intake on my stock 383, personally I like it better then the dual-plane intake I had on it before.. The only difference I noticed with the single plane intake is I have more go at the top end, once I hit 60-70 mph And step on it that engine opens up and it’s off to the races...With the dual-plane intake I had more get up and go at first and around 80-90 mph the car seemed to just stop gaining in speed.
 
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I wish these had a standard carb flange. Spread bore only for this model. Thermoquad, Quadrajet, or like the old 6210 Holley unless you run a adapter. edelbrock 2176 - Google Search I have a used one.
 
I have a pretty hefty built w2 340 stroker (418)
I ran the single plane m1 w2 intake on this bad boy. She loved to scream up top but felt weak down low unless I dumped the clutch at 3 grand (give or take)
I then switched to a w2 dual plane and OH MY GAWD The torque would grab your throat and stuff it into your rectum..

For your place a dual plane or the Eddie air gap intake. Especially if street driven. Single planes can work on the street but revving at 3 grand at the stop light is no fun.

I am no expert either
 
If this motor is designed and built for 6000 rpm and less, then the Dual plane intake is the way to go. Your street Dominator intake is a good intake, an will work ok on the street providing you have an aftermarket cam headers etc. was designed for mild applications. try it and see what you think.
 
The intake will be fine, better than a dual plane.

Those magazine tests are bull crap.

Had a Dart with a stick, 1.75 headers (way too big according to some), 284 MP cam, and a Torker. On street tires, you could leave at 3000 and walk the clutch out and get a decent run.

All we did was change to a Strip Dominator and at 3000 it would smoke the tires no matter what. So we kept working at it. Had to come all the way down to 1800 to get the car to 60 foot the same.


The moral of the story is this: the nine made so much more power about 2200 with the Strip Dominator it changed they way you had to drive the car.

I've said it for decades. The dual plane and single plane intakes don't use the same cam, or the same carb. If you run an 850 and 280ish cam on a dual plane, you need only a 750ish and 270ish cam with the single plane to get better power all over the curve.


It's about the package, not any single part.
 
I see 2 people recommended LD4B intake.....I read you have 340 in the car so that is not the correct intake as that has smaller ports for 273 and 318....you want the LD340
 
Rani, I have a Holley Street Dominator right now on a 318. In most cases, the single plain is not what you want for a daily driver unless you have decent gears, good converter, or a stick shift car. However, the Holley SD is meant to build low end torque, thus the reason it's called a "street dominator". It actually does well on the low end..... however......
Here is the kicker: Even though the above what i wrote is true, the Holley SD only has 318 size ports as mentioned in a post above and wouldn't be my choice for a 340. The factory 340 intake would be better than the SD in your particular situation.
 
Rainy Day Auto said:
I have a Holley street Dominator intake manifold that is a single plane (not sure if they all are)

I am not really familiar with aftermarket intakes as I have only run factory parts.

Is this a good manifold to use a street driven car?? The combo is a 340/4speed. the 340 is a 73 and mostly stock and is a good running original out of a 73 roadrunner.

The car it is going in is a 71 scamp
Click to expand...
Hey Rani!

IMO, having one of those intakes in the past, I’d continue to run the factory dual plane. It runs well enough though. I myself wouldn’t go through the hassle of changing it out.

The factory intake works very well even with upgraded headers, exhaust, small cams etc...
 
The Holley Street Dominator is perhaps one of the big misnomers i the hot rodding world. They are one of the best old school intakes for the street. Yes, it's a single plane (get out the torches and pitchforks) but it has a generous plenum area that adds to it's bottom end torque ability, unlike most any other single plane.

Compare it to the Torker. Look how large the plenum area is compared to the Torker. Street Dominators have always had a reputation for producing really good low RPM torque as well as all through the RPM range. Those who have really used one will tell you the same thing.

Are there "better" more "modern" intakes? Sure. But I say if you HAVE ONE, no need to buy something else. Run it. You will like it.
 
318willrun said:
Rani, I have a Holley Street Dominator right now on a 318. In most cases, the single plain is not what you want for a daily driver unless you have decent gears, good converter, or a stick shift car. However, the Holley SD is meant to build low end torque, thus the reason it's called a "street dominator". It actually does well on the low end..... however......
Here is the kicker: Even though the above what i wrote is true, the Holley SD only has 318 size ports as mentioned in a post above and wouldn't be my choice for a 340. The factory 340 intake would be better than the SD in your particular situation.
Click to expand...

But that is a moot point on all but hotter street engine builds, IMO. Remember, Chrysler did it on millions of engines, but the other way around.......which is much worse. Big port intake on a small port head.......but it worked well.

A small window intake on a big port head could actually have some advantages increasing velocity on a mild to moderate engine build like what Rani is talkin about. I say since she has it, she should use it.
 
RustyRatRod said:
But that is a moot point on all but hotter street engine builds, IMO. Remember, Chrysler did it on millions of engines, but the other way around.......which is much worse. Big port intake on a small port head.......but it worked well.

A small window intake on a big port head could actually have some advantages increasing velocity on a mild to moderate engine build like what Rani is talkin about. I say since she has it, she should use it.
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If she has no intentions of racing it or "playing around out of town", then it will work fine. But it will not perform as well as the factory cast on a 340 head/340. I believe it would be a bottle neck with the small ports in the RPM's. On my 318 project, the SD didn't run quite as well as the factory cast TQ intake at the drag way. I've made a small change that i will try again when the strip opens. It cut a little better 60 ft time, but gave up a couple of mph and almost a tenth. Again, i plan on returning soon.

By the way.... stay tuned! I've been busy, and i'm going to do some intake wars this year on my cars.....
 
Then there's always the doorstop.
 
I wonder how many guys have ran a single plane,changed to a dual plane and then compared their 60' and quarter mile times on a stock mopar?
I have posted this before but i ran a Torker intake on a stock 340 about 20 years ago.If you read what everybody says they are totally useless and the worst intake going.Well my little Dart would break loose easily from lo speeds and ran hard no problem!Back in '73 a good friend had a '72 'Cuda that he put a Torker on along with a Holley carb and headers.It was one of the fastest street cars in Thunder Bay at the time.
More often it's a big cam and tall tires that ruin lo speed power.
Don't take magazines, TV shows and rumour as verbatim!
 
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ir3333 said:
I have posted this before but i ran a Torker intake on a stock 340 about 20 years ago.

Don't take magazines, TV shows and rumour as verbatim!
Click to expand...

THe test posted here confirms your experience. So maybe in this case take it verbatim?
 
RustyRatRod said:
The Holley Street Dominator is perhaps one of the big misnomers i the hot rodding world. They are one of the best old school intakes for the street. Yes, it's a single plane (get out the torches and pitchforks) but it has a generous plenum area that adds to it's bottom end torque ability, unlike most any other single plane.

Compare it to the Torker. Look how large the plenum area is compared to the Torker. Street Dominators have always had a reputation for producing really good low RPM torque as well as all through the RPM range. Those who have really used one will tell you the same thing.

Are there "better" more "modern" intakes? Sure. But I say if you HAVE ONE, no need to buy something else. Run it. You will like it.
Click to expand...

Yup. Large plenum, small runners. Port velocity stays up, so the bottom end isn’t terrible even though it is a single plane.

I have an edelbrock streetmaster on the 318 in my Challenger. Very similar intake to the Holley street dominator, single plane with small ports. Pretty much a stock 318 for the build. Worked great with a 600cfm carb and headers.

Would an Air Gap or Performer RPM work better? Of course. But the street dominator and streetmasters are pretty decent for what they are.
 
included in this "magazine test" is the "new Edelbrock air gap" dual plane!
Hmmm?
 
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roccodart440 said:
Tells you everything you need to know right here.
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Yep. That magazine tests are worthless. Go to Comp and look at the lobes they are using. Even they say it isn't a street lobe. It's also on a 108.

A better cam choice would have made the SD the better choice.
 
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