Smallblock intake manifold shootout.

Small Block Mopar Engine

  1. 340 Dart

    340 Dart I don't know shit.

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    I remember reading about one of these a while back and cannot find a link.
    Did anyone save it?

    I need to compare HP and TQ for a performer, a RPM airgap, and a Weiand accellerator.
     
  2. srduster340

    srduster340 FABO Gold Member FABO Gold Member

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    The Airgap wins hands down. From low end torque to top end horsepower. Try Moparmusclemagazine's website. They done the test.
     
  3. 340six

    340six Well-Known Member

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    Air Gap

    airgap.jpg
     
  4. Petzschler

    Petzschler →Welcome back←

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    against the previously listed manifolds yes.. but there are much better ones out there.
    cheers
     
  5. fishy68

    fishy68 Tyr Fryr's Inc. FABO Gold Member

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    What do you consider better? And for what usage are they, i.e. street/strip or race only.
     
  6. Petzschler

    Petzschler →Welcome back←

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    a little old 25 year old design comes to mind, Holley Street Dominator. the name implies the usage. also the Victor 340 is a kickass one too. has terrific street manners.
     
  7. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    anyone has a link to that old story....
     
  8. ramcharger

    ramcharger Dismember

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    I just made a post on this manifold. Single plane and great low end torque. I had one on a Ford build I did years ago and was totally impressed. Never seen them compared on a dyno though...
     
  9. fishy68

    fishy68 Tyr Fryr's Inc. FABO Gold Member

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    I hope somebody does come up with a link to the article. I'd love to see it. I saw an article in a Chevy high perf. mag. recently that tested a bunch of manifolds and the Air-gap pretty much crushed the opponents. They did the test with 2 different cams too. A mild street cam and a pretty aggressive roller. Even with the big cam the Air-gap did better than any other manifold below 5500 rpm. Only a few made more power above that and even then the diff. wasn't much.
     
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    • 340 Dart

      340 Dart I don't know shit.

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      I currently have all 3 of these plus a cast iron factory one from a 360.

      I need one for my 318, one for my 340 and one for the 360. I can find a decent shootout for big block intakes, but nothing for a smallblock yet.
       
    • lead69

      lead69 hopeless car junkie

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      Hopefully someone can scan the story and post it.
       
    • 340six

      340six Well-Known Member

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      I ran one for years on a 71 340 it was great for low end but is short and small port so top end was realy lacking.
      The same goes for performer intake both have smaller ports like a 318 head good for "street use" on 340-360
       
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      • JR

        JR Pissed off senior member.

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        Bad idea, we have gotten in trouble in the past from Mopar mags due to copyright issues. Your best bet is to email it directly to the people that want it.
         
      • JR

        JR Pissed off senior member.

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        Oh yeah, if you do get a Weiand intake make sure it fits your motor before anything else! The last one I got for a 360 only one of the bolts lined up with the heads, a few were at least 1/4 inch off and the casting was so bad that it cut my finger when I rubbed it. I have heard other horror stories about their Q.C. They must have gone to the Barry Grant school of quality control.
         
      • ramcharger

        ramcharger Dismember

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        The engine I used it on was a Ford 400M and it just sang at 6000 rpm. It was tall enough that I had to use a scoop on my Torino with a drop base Moroso air cleaner. This is obviously an apples to oranges comparison though as I was using closed chamber Australian 351 Cleveland heads. These heads are splay valve and a "semi hemi" configuration and the ports/valves are huge compared to chevy or Mopar heads.
         
      • ramcharger

        ramcharger Dismember

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        I've got a Weiand Action+ on my RC and it fit beautifully and the casting quality was second to none. This was a used piece of unknown vintage from another member though, so as you say, quality control may have gone down hill....
         
      • 340 Dart

        340 Dart I don't know shit.

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        I've had my Weiand accelerator about 5 years. It started on an old 318 build then ran on a 360 for 4 years. Got my old Dart into the 12.9's. It is on my new 340 in my Duster now but I just got a good deal on an RPM Airgap and wondered it it is worth changing it out. 5HP I am not going to sweat, but if I am giving up 10-15 in TQ it is probably worth thinking about.
         
      • stroked 340

        stroked 340 Banned

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        First off you should'nt be comparing any single plane intake to the air gap its a dual-plane..Secondly i don't really read much into what magazines say,they're trying to sell their product..as for me i run the Air Gap on my stroker and 360 it flat out works i've got time slips to prove it,and thats all that counts..:-D
         
      • rumblefish360

        rumblefish360 So close, yet so far away FABO Gold Member

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        Well said stroked 340. Another point I would like to , point out is that the intake shoot outs were on a specific engine combo and all the intakes were tried out on it. This is a problem. The lower performing intakes, like Edelbrocks Performer should not have been on top of he engine. While it didn't perform to badly, it was giving up alot of power. The test showed this and , well, I guess it was good they showed it so you yourself do not leave power on the table.

        I have the article saved on paper. I just do not remember ANY Weiands used in the shootout test. I'll double check in a few. But I would make a comaro of it to the Torker II they used.

        A single plane in the street needs alot of stall converter and gear to be able to compete with a well done dual plane intake set up. If you can't get a set up where the stall converter and gear come into play at approx. around 3500 - 4000 rpm, a dual plane is a better bet.
         
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        • lead69

          lead69 hopeless car junkie

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          Wow,in my internet searching I see lots of scanned articles but I guess its no suprise considering the corprate world we live in.
           
        • Petzschler

          Petzschler →Welcome back←

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          i've never seen a drastic improvement in ET with ANY intake swap (other then a T-Ram. those things just flat out haul ass), thats only happens when you upgrade the rest of the components. BUT.. I'll put up the LD340 (nutter 30+ year old design) against the Performer RPM AirGap any day of the week. theres your DP vs DP comparison. so on a modded enigine IMO this is the pecking order for horsepower and torque:

          1. Tunnel Rams (mopar M1)/crossrams (edelbrock STR)
          2. pure Race Single plains (Edelbrock Victor/ Holly Strip Dominator)
          3. LD340/Performer Rpm/Holley Street Dominator
          4. street single plains
          5. Six Pack
          6. street dual plains/stock TQ's

          feel free to add others

          cheers
           
        • stroked 340

          stroked 340 Banned

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          This coming from a guy that was running a MOPAR in a CHEVY:angry7::angry7:!!!
           
        • Bill Dedman

          Bill Dedman bill dedman Legendary Member

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          Well, you gotta give him credit; at least, he got the ENGINE right!!! :cheers:

          A couple of years ago, I saw a manifold test in a magazine (Car Craft, I think) in which they tested several manifolds on a dyno mule (360, moderate hop-up) and the manifold that made the most horsepower was an M-1 single-plane, but it only beat the Eddy Air Gap by ONE horsepower, and gave away a bunch of mid-range torque in the bargain. Not a very good deal....
           
        • rumblefish360

          rumblefish360 So close, yet so far away FABO Gold Member

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          Good point Bill. Right intake for the right job.
           
        • stroked 340

          stroked 340 Banned

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          And thats why theres a 'air-gap" on my street/strip car..good street manners,runs 11's at the track:cheers::cheers:
           
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