Ditching Dual Quad Eddies for Quick Fuel Race Q-950

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  1. 74Beeper

    74Beeper Well-Known Member

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    So,
    i'm finally fed up with trying to get these dual quad 750 Eddies tuned. I love the look and attitude of the duals but i know this combo is killing my drive-ability and top end power. So they're going along with the INDY ModMan intake. What i'm replacing it with is an INDY 360-3R intake and a Quick Fuel Race Q-950. I'm thinking i'll pick up at least 50hp. Quick Fuel seems to be a great company to work with. I gave them my engine and drive line specs and they're gonna set the carb up and engine run it before they send it to me. They said they're pretty much dead on out of the box 90% of the time.

    Really looking forward to to getting this on and seeing how it performs.

    Has anyone out there had any experience with Quick Fuel carbs???

    http://www.quickfueltechnology.com/carburetors-race-q-series/race-q-950-cfm.html
     
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    • benno440

      benno440 Well-Known Member

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      I got rid of my dual quads and went a custom built prosystems carb with billet metering blocks, best thing I ever did.
       
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      • WileERobby

        WileERobby Well-Known Member

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        I've been blasted for recommending a single 4 over multi-carb setups before, so I got nothing to say.
         
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        • Seventy

          Seventy Well-Known Member

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          I know a gentleman with a brand new in the box custom barry grant he bought for his 440, it was a $980 carb, still has the receipt, he will probably take $500 for it... If you are interested let me know..

          BUT, going from dual quads to a single, is just preference, I prefer a single 4bbl over everything except FI, for a driver or racer, to me they are easier to tune, you get more for your money, better throttle response, more predictable and consistent...... PLUS much easier to find an air cleaner, lol... Good luck, let me know if you are interested in that BG, ill set you up with him..
           
        • 383man

          383man Well-Known Member

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          My buddy put a tunnelram on his 68 Cuda 440 stroker race car and ran about the same as the single Dominator did. Both setups ran 9.90's but it did pull about 2 more mph with the tunnelram. He worked the tunnelram carbs a little but may have gotten more out of the tunnelram if he had tuned on it more. He went back to the Dominator as he felt it was easier to tune and keep in tune. Ron
           
        • SUPERSTOCKRACER

          SUPERSTOCKRACER Well-Known Member

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          not sure where your problems are but I love my dual edelbrocks setup on my indy max wedge intake and tunnelram . Care to tell me where the issues are?
           

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          • 74Beeper

            74Beeper Well-Known Member

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            Thanks but i already bought the Quick Fuel carb and i hear ya about the air cleaner issue.... Not many to choose from for dual quads. I tried several before i found one that looked and functioned good. Ended up goin with a Billet Specialties air cleaner but now it's a $450 paper weight!

            - - - Updated - - -

            I have such a low vacuum signal that the Eddies won't respond to idle mixture adjustments and it's not very street friendly. I'm running a progressive linkage and right before the second carb kicks in it gets lean and surges then when the second one comes on it gets fat and stumbles. I've tried running them direct and then it kills throttle response. I tried running two 500's which helped throttle response but then killed my top end HP. Went up to two 750's and got the top end back but killed throttle response. What is really killing the power is the intake. I'll gain 40-50hp by just ditching the ModMan and i'm not cutting any holes in my hood for a tunnel ram. If you know of anyone looking for a ModMan dual quad set up with 750's and set up to fit on Indy 360-1 rectangle port heads, let me know. I've got one for sale.
             
          • lewtot184

            lewtot184 Well-Known Member

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            how much of the problem can be blamed on the mod-man intake? i wonder what mental giant thought up that design. the only use i can see for that intake is to modify it for a blower.
             
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            • 65 3 times

              65 3 times FBBO Gold Member FBBO Gold Member

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              I purchased a Quick Fuel Race Q-850 w/annular discharge after talking to them. I also was impressed the first run. It launched well and ran out the top well. After about 40 passes I tried larger jets by four #'s front and rear. It was kind of funny cause the driver (me) thought the car launched better and sounded stronger. It slowed by almost 2/10's for the 4-5 runs. We switched it back and it picked back up. I am happy with the product.. Dave
               
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              • MT_Mopar

                MT_Mopar Well-Known Member

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                I have been logging my Jet/Bleed sizes and A/F info. The QF950 is very tune-able. You will like it much.

                QF 950 Tune.jpg
                 
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                • 74Beeper

                  74Beeper Well-Known Member

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                  Thanks for the feedback Dave...... I did not go with the annular booster but i'm sure i will be happy with the carb. I've heard and seen nothing but positive about them. Guess the only whine i've heard is some guys say they're too spendy...... They're priced about the same if not cheaper than a Holley and they're spec'd for your car and engine tested before you get it.

                  - - - Updated - - -

                  Wow! that's great! Thanks man!

                  - - - Updated - - -

                  Yep....... I agree.
                   
                • dangina

                  dangina Well-Known Member

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                  I got the QFT 830 street carb with mechanical secondaries and annular boosters. I went with this setup as I wanted the electric choke. very happy with it :)
                   
                • dvw

                  dvw Well-Known Member

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                  My car has gone 9.11@147.7 on box stock Eddys with the chokes removed. With a pair of 800 Pro-Sytems Holleys it has been 9.10@148.6.The Eddy's are pretty close for way over $1000 less.
                  Doug
                   

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                  • 74Beeper

                    74Beeper Well-Known Member

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                    That's a pretty sweet picture...... My WOT power issue has to do more with the intake...... My street driving issue has more to do with the Eddys. They just wont respond with 3 inches of idle vacuum.
                     
                  • splicer

                    splicer Well-Known Member

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                    I can't comment on carbs set up by Quick Fuel as I've no experience with that.....I have, however, used several Quick Fuel carbs including the 1050 CFM 4500 currently on my 505" stroker and have found them all to be excellent products....I do drive mine on the street as well as the strip so can understand your issues with driveability.....

                    I have found the Quick Fuels to be almost infinitely adjustable and their selection of parts and accessories second to none.

                    Splicer
                     
                  • dvw

                    dvw Well-Known Member

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                    Why does it have only 3" of idle vacuum? Something is incorrect.
                    Doug
                     
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                    • 74Beeper

                      74Beeper Well-Known Member

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                      It had 6-7 @ 1200rpm in it's original configuration and THAT wasn't enough to get the Eddys to respond...... Now, Ryan J. at Shady Dell Speed Shop is going through my heads and grinding me a new cam and he said it will have about 3-4 inches @ 900rpm with the new configuration. I know Ryan knows what he's talking about and what he's doing.
                       
                    • bishop

                      bishop Well-Known Member

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                      I have a Indy T/R and a pair of 950's going on a 572 HEMI that made 895 with a RBRE crossram with two 770 vac carbs We'll see if these QF and intake makes a difference

                      Brian
                       

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                      • 383man

                        383man Well-Known Member

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                        My brother is now running the Mod Man intake intake with two Eddie carbs. he had a little stumble he tuned out and its working great now. Did some metering rod changes and stretched the metering rod springs out. He is very happy with how it works now. Ron
                         
                      • 74Beeper

                        74Beeper Well-Known Member

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                        When INDY "built" my motor, they said the ModMan intake was killing my top end HP..... At the time, keeping the look of dual quads was more important than function..... Now that i have the engine in the car and driven it, i'm after the HP......
                         
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