Weiand Action Plus vs Edelbrock RPM

Discussion in 'Small Block Mopar Engine' started by 318willrun, Jun 11, 2018.

  1. 318willrun

    318willrun Stomper 4x4... we kept energizer in business

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    We all know on decent built/geared car the RPM is the way to go. I'm curious if it will offer any gain on MY car. As always, sharing with ya'll. I'll be posting results soon! :)
     
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    • 318willrun

      318willrun Stomper 4x4... we kept energizer in business

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      My car.… Stock 360 with .427 intake lift/204* @ 50. No headers, 2.45 gears, stock converter. Lets see in this situation if there is a difference.
      dscn0977-jpg.jpg
       
    • roccodart440

      roccodart440 Well-Known Member

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      It would be better even in a stock engine. Think about the stock stall speed and the power band of the intake. 1500-6500
       
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      • 318willrun

        318willrun Stomper 4x4... we kept energizer in business

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        I hope, but I'm really doubting any gain of notice. We'll see soon enough. 1st chance I get I'll be at the strip. As always, I'll post the E.T. slip :)
         
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        • Wyrmrider

          Wyrmrider Well-Known Member

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          we'll you save some weight
          204 cam is not much different than stock - what's the seat timing- is this the Edelbrock or similar?
          stock converter
          test cold air vs no cold air
          have you spent much time on advance curve
          what exhaust after manifolds?
          can you get 60 ft and 1/8 times
           
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          • 318willrun

            318willrun Stomper 4x4... we kept energizer in business

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            • not much weight, if any - both aluminum
            • correct, it's barely above a stock 2bbl cam - split pattern cam has .427 on intake and .450 lift on exhaust.
            • stock manifolds/2.5 duals
            • already ran it and got a E.T. slip (1/4 mile) in it's previous state
            Only thing i'm changing on this test is the intake. I want to see for myself, and share with you all :)
             
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            • rumblefish360

              rumblefish360 so close yet so far away

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              That’s the spirt!!!!!
              And the old school way of “actually knowing!”

              That’s the way I learned. Purchase and try.
              And you mention something Golden most everyone forgets and ignores. “YOUR PARTICULAR COMBO” is what actually and only counts “FOR YOUR APPLICATION!”
               
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              • 318willrun

                318willrun Stomper 4x4... we kept energizer in business

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                Yeah, a person never graduates from this school... forever learning :)
                I guess I just self-entertain with these projects. Like this one, swapping intakes on a perfectly good running motor that performed very well considering the circumstances. But, I'll learn, and hopefully it helps somebody else make a decision as well....
                 
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                • MOPEkidD-3

                  MOPEkidD-3 Torsional Member

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                  This is a great test and you're going about it the correct way changing ONLY the manifold, then you/we will know exactly how much difference it makes. Always been curious about this myself, if Weiand happened to use Computational Fluid Dynamics to design their manifold it can't be that different from the Edelbrock in performance.
                   
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                  • RustyRatRod

                    RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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                    Please elaborate.
                     
                  • pishta

                    pishta I know I'm right....

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                    I shipped a RPM and IIRC it weighed 28 lbs. The cast iron was like 55. Hand that to the mailman in a flat rate game box! :rofl:

                    PS> Put both in a bucket of water and measure the rise of the water, Im sure they use the same alloy so you can weight them or use this for volume of AL.
                     
                  • 318willrun

                    318willrun Stomper 4x4... we kept energizer in business

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                    Quick seat-of-the-pants test revealed nothing that I could tell. Granite, I don't drive the car very much, but I have a spot on a back road and it did the exact same mph as before. Of course, the ET slip will have the final say, and keeping in mind that each day at the track can very a tenth due to the weather, but we will see. Don't know when my next opportunity to go to the track will be, but i'll go there soon as I can.
                     
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                    • Wyrmrider

                      Wyrmrider Well-Known Member

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                      He says both aluminum
                      did you post your cranking compression? with carb held open?
                       
                    • 318willrun

                      318willrun Stomper 4x4... we kept energizer in business

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                      I did not post cranking compression because I'm not trouble shooting. The car ran great, exceeding all expectations. This test is strictly to see if the RPM can outperform the Action Plus on a car that is completely not set up for the 1/4 mile from bumper to bumper, such as mine :)
                       
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                      • 318willrun

                        318willrun Stomper 4x4... we kept energizer in business

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                        Correction to post 12. When I did the first quick test, I was up against the clock and it was starting to drizzle rain. I went out today (clear and sunny), and I take back the above statement in post 12. I think it does pull a little harder, and I tried it again at my favorite spot and I'd say (best I could tell) the speedometer was favoring the plus side of the previous intake by 1/2 mph?? lol. Again, we'll see when I can take it to the track. Until then, Peace :)
                         
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                        • bignick

                          bignick Well-Known Member

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                          I have a weiand stealth manfold for a very similar build. Basically stock with a 340 replacement cam 209/220@ .050. It will have a 3.55 gear though. And a stock converter.
                           
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                          • 12many

                            12many Well-Known Member

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                            Port them both and so some comparisons too!!:)
                             
                          • 318willrun

                            318willrun Stomper 4x4... we kept energizer in business

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                            Well, It went from a 14.14 down to a 14.11. Hard to say weather conditions. I know today wasn't good air. Typical this time of year. MPH was .5 slower (97.2 down to 96.77), 60 ft time went from 2.05 to 2.01. Both intakes gained a solid 20 mph from the 1/8 to finish.
                            Bottom line, I think there is a "slight" gain, but I think this shows it's not necessary to spend money to go from an Action Plus to a RPM on a real mild car. Obviously, the more "upgrades" to the car, the more it would favor the RPM.
                             
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                            • rumblefish360

                              rumblefish360 so close yet so far away

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                              As locomotion would say, “I’m my particular application.” As most parts go, you may find more HP in the XXX part but it doesn’t mean you’ll go faster in the 1/4 mile.

                              From your stand point right now I’d call the parts equal in the 1/4 mike only because you have a lack of data over the course of time.
                               
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                              • 318willrun

                                318willrun Stomper 4x4... we kept energizer in business

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                                that was kind of my point in doing this project. If I gained a little, great (I think I did). Hopefully this will help somebody that is limited on money make a decision on an intake. Actually, the factory cast TQ intake is tough to beat, and can be bought on the cheap.
                                 
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                                • Nirvana

                                  Nirvana Mopar

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                                  I'm that person, very much enjoy your threads. My 79 aspen has the factory 4bbl intake and I have been debating an upgrade, exactly the two manifolds tested in this shootout. I might just keep the factory manifold at this point.
                                   
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                                  • 318willrun

                                    318willrun Stomper 4x4... we kept energizer in business

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                                    Thanks man. Your post is the reason it's worth my time to post/share my experiences. Glad to help. I love test-n-tuning, 30+ years doing this and I still love it.
                                     
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                                    • rumblefish360

                                      rumblefish360 so close yet so far away

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                                      Myself and a few other have been saying the factory intake is tough to beat for years now.
                                      A lot depends on what your doing. For general purpose and performance, stick with the TQ intake and (early) TQ carb. The draw back is intake weight and super tuning the carb. But flexible and forgiving they are.
                                      At what point do you stand now?
                                      I am also in the same frame of mind. I actually enjoy the experimentation more than the racing. (But I do (or did) like the back alley night racing best. More racing, more action.)
                                      I did at one point many years ago I tried to show how a 318 can be a good performer. But finances told me I could not continue the fun.
                                       
                                    • Nirvana

                                      Nirvana Mopar

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                                      Daily driver duty rain or shine.

                                      It has a Eddy 600 CFM and cheap headers on it from the PO who tried to hot rod it in his own way.

                                      The eddy ain't bad when its not 115° and the fuel doesn't start boiling in the bowls. But this is Vegas and that is common in the summertime unfortunately.
                                       
                                    • Ottmundr

                                      Ottmundr 68 Fastback

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                                      Uh-oh, I was just thinking. If the difference between the two brands is a couple of hundredths, couldn't you get that same variation with two 'idenntical' weiands or edelbrocks due to casting variations?
                                       
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