promag 20 or 44

Discussion in 'PSI Superchargers Tech Questions' started by Comax Racing, Oct 8, 2015.

  1. Comax Racing

    Comax Racing Member

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    I've decided i don't want to mess around with mallory supermag stuff anymore and want to go to a promag. I have an 8amp supermagV now. Just wondering what the best promag would be.
    Its on a 540 inch chevy, 14-71 hhr littlefield, 11:1 compression. I built the engine to handle 40psi boost. But will probably run 30psi most of the time.
    What amp promag would be the best. I don't want to have to upgrade again.
    20 amp or 44 amp?

    Thanks
    Corey
     
    #1
    Comax Racing, Oct 8, 2015
  2. Mike Canter

    Mike Canter Top Dragster
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    The Promag 20 will give you plenty of spark. The only thing I don't like about the 20 is that the coil and points box are combined into one box and in the 44 they are separate.
     
    #2
    Mike Canter, Oct 8, 2015
  3. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    parts

    huge negative on the 12 or 20 is you are on an island for parts. if you get a 44, you will have a much better chance of someone having a part if you need it. I had a TD customer with a 12 at a regional event, had some ignition problems. He was the only one at the track with a 12 and there was 20+ alcohol cars there that could have helped him if he had a 44.

    Not to mention a lot more used parts for them on the market.

    Will the 20 get the job done? Yes. By the time you buy 2-3 of everything for the 20, you can buy a good used 44.
     
    #3
    Will Hanna, Oct 8, 2015
  4. jody stroud

    jody stroud ZOMBIE Top Dragster

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    Like Will said get the 44 amp mag. The fact that is you'll never regret getting the best part for your dollar. And in this case the 44 in the better part.
     
    #4
    jody stroud, Oct 8, 2015
  5. TADHemiracer

    TADHemiracer Member

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    20 or 44 Pro-Mag?

    Save yourself some hassle and some money in the long run and get the 44 to start with.
     
    #5
    TADHemiracer, Oct 8, 2015
  6. SoDak

    SoDak Active Member

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    Is there much difference in price between the 12, 20 & 44? I didn't think there was which is all the more reason to go straight for the 44.


    What are the maintenance differences? For instance, do you need to change the coil wire more often with the 44?
     
    #6
    SoDak, Oct 9, 2015
  7. Comax Racing

    Comax Racing Member

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    Biggest reason I ask right now is I have come across a couple of 20's for sale used but no 44's at the moment. Just want to make 1 purchase and be done. I'm in no rush, gonna keep my eyes pealed for a 44.

    Thanks
    Corey
     
    #7
    Comax Racing, Oct 10, 2015
  8. TADHemiracer

    TADHemiracer Member

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    20 Amp Mags

    Kind of makes me wonder why the 20's are for sale in the first place??? Seller went to 44's?
     
    #8
    TADHemiracer, Oct 12, 2015
  9. Policy Peddler

    Policy Peddler Member

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    former 20 owner

    I ran 3 - 20's for several years. The boxes were a continouis issue. I was told it was because the system was a hopped up 12.
    If you run the 20's carry 2 extra boxes with you.

    Switched to the 44's a few yrs ago, changed rotation my self from hemi to chevy, and took off the Hemi short base, and put on the chevy one piece base. Never have had a problem with any of the 3 - 44's I bought used.
     
    #9
    Policy Peddler, Oct 15, 2015
  10. SuperComp517

    SuperComp517 New Member

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    #10
    SuperComp517, Oct 19, 2015
  11. Cdn526

    Cdn526 Member

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    used mag

    If your running a blower, you'll want a points box w/ the rev limiter (p/n 8147), as I think the one in that ad does not (p/n# 8145).
    And good used systems, checked my EM / MSD / etc are out there for less than $2600, more like $2300
     
    #11
    Cdn526, Oct 25, 2015

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