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dual plane vs open plane intake

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Old 03-27-2009, 01:03 PM
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dual plane vs open plane intake

i have a torquer 2 intake on my slightly modified 350 and i'm considering changing it for the performer. i would rather have the air gap but hood clearance is an issue for third gen camaros. my question is this, would the dual plane be better in the 1/4 mile or should i stay with what i have?
Old 03-27-2009, 02:18 PM
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Re: dual plane vs open plane intake

i'd probably go with the performer RPM, its slightly taller, but imho a better intake, should fit under the hood on a camaro. should give you more mid range torque without sacrificing top end power
Old 03-27-2009, 02:18 PM
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Re: dual plane vs open plane intake

Please read this. Looks like you may want a dual plane, but does depend on your power band and such. Power adder?

http://www.popularhotrodding.com/eng...ake/index.html
Old 03-27-2009, 11:53 PM
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Originally Posted by mpb74
i have a torquer 2 intake on my slightly modified 350 and i'm considering changing it for the performer. i would rather have the air gap but hood clearance is an issue for third gen camaros.
The Air Gap manifolds don't put the carb any higher than the non-Air Gap versions of the same intake.

Originally Posted by mpb74
my question is this, would the dual plane be better in the 1/4 mile or should i stay with what i have?
Depending upon stall, gears, cam, heads, exhaust (basically, the total package), most likely you'll be quicker in the 1/4 mile with a dual plane. That Torker 2 is a horrible piece.
Old 03-28-2009, 06:58 PM
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Re: dual plane vs open plane intake

Originally Posted by five7kid
The Air Gap manifolds don't put the carb any higher than the non-Air Gap versions of the same intake.


Depending upon stall, gears, cam, heads, exhaust (basically, the total package), most likely you'll be quicker in the 1/4 mile with a dual plane. That Torker 2 is a horrible piece.
When I had an RPM Air Gap, it fit tightly under the stock SMC ('glass) Z28 hood, but it did fit. It will fit a bit better with the stock steel hoods.

I was a little faster in the first 1/3 of the track with my RPM compared to my Torker 1, top end and ET were basically the same though. Midrange was quite a bit better with the RPM. A friend of mine with a mid-11 sec 406ci Trans Am is about 3 tenths faster with his RPM than with his Vic Jr intake - and thats with a TH350 with 4500-ish stall and a 3.89 geared 9".

I'm going to be changing up to a Holley 300-36, which is a dual plane thats about the best there is IMO, though its about 1/2" taller than the RPM, so it won't fit under a stock 3rdgen hood. I'll be building a new hood for this before it goes on. The Holley 300-36, which is out of production as of last year I think, is arguably better than the RPM by a little bit. More port volume, more plenum volume, and just a much nicer casting internally. Very nice intake. Works very well from what I have seen.

Almost anything will be better than your Torker 2 though... even a stock aluminum intake would be a better choice IMO.
Old 03-28-2009, 07:51 PM
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Re: dual plane vs open plane intake

I have used the Performer, (yuckk) the PerformerRPM and a GM Z28 intake. I really like the taller midrange intakes better for overall performance. The stock height manifolds are geared for lower rpm and better gas mileage on small engines.

I would loose the Torquer II (as stated above) and get a tall dual plane style. Here's a tip...cut the center divider out of it and trick it into thinking it's an open style manif. I did this with my Z28 intake (on my 305) and it gave the engine more power from about 1500 on up, with the meat of the power turning on above 3000. Under 1500 died a little, but I have a 5sp and 3.73s so I didn't really miss it. The cam was a 268 CompCams and the compression was near stock level. (it really should have had more)

The only other option I would recommend would be a VictorJR. These intakes have proven themselves to be very versital with good street perfomance and of course great track power.

Loose the Performer as it is nothing more than a stock replacement unit in my eyes. The "Air Gap" manifolds only protect the charge from internal engine heat. In an everyday situation this isn't really the best idea.

Don't forget that to clear a stock hood you can get "drop base" style air cleaners and still run a 2 or 3 inch filter, depending on which manifold you go with.
Old 03-28-2009, 08:14 PM
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Re: dual plane vs open plane intake

Since you are using the Torquer II I'm assuming you've already changed to a square-bore carb (Holley or Edelbrock). If that's the case you might want to look at the newest memeber of the Performer family- the Performer EPS. They applied some of the new computer-modeled flow technology from the RPM to the base model performer and came up with the EPS. Will definitely clear the stock hood and should clobber the old Torquer II from idle up to about 5000 or more. The latest design Weiand Action+Plus intake is a direct competitor to the EPS, probably every bit it's equal, and available for less money than the EPS.

If you're spinning the motor beyond about 6000 and expecting real power up that high then the RPM would probably still be a better choice.
Old 03-29-2009, 04:12 PM
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Re: dual plane vs open plane intake

I am currently running the Air gap performer rpm on my 355 the rpm range is 1500 - 6500. Hood clearance is an issue. I have a goodmark steel 3" cowel hood and i had to go with the Edelbrock 1002 air cleaner because thats all i could fit under the hood. You could go with a drop base but with an HEI distributer you may have clearance problems. I know that K&N does make a drop base that is offset to clear the HEI distributer.

Old 03-30-2009, 10:31 AM
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Re: dual plane vs open plane intake

i have a 350 with stock heads and a little stiffer spring to handle my cam, (crane 486 lift) decked 10 and bored forty. i have a 342 gear and i'm running a holley 600 cfm carb. 700r4 tranny freshly rebuilt in nov 08 with a 2000 stall. we rebuilt the carb over the weekend so we put some brass floats and performance secondary vacum. i havent tested the car on the track yet but it seems to run pretty strong! i almost purchased the performer friday but i layed it back on the shelf. i want to buy the right one because i hate to spend 200 bucks and slow my car down. is eldelbrock better than holley when it comes to intakes?
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