Online: GGUser260, paulybronco, evo94

M8 131 injectors

  • Mesmer
    Mesmer
    14 days ago
    I'm thinking about going up to the 131 kit from the 114. The shop suggests going with LS injectors. Anyone have experience of this mod?
  • tussuck
    tussuck
    14 days ago
    No idea… it’s all about fuel flow so research the recommended injectors for your kit/build.
  • DocGreen
    DocGreen
    14 days ago
    Mesmer, doesn't the 131 kit come with new injectors to suit?
    DocGreen
  • FBUser214
    FBUser214
    14 days ago
    If you think the guys on this site know more about your injector requirements than your shop, you better find another shop.
    I don't know a lot about M8's, but one thing I have noticed is that they have a higher feed injector demand, even with stock heads.
    Check out Alpha Performance Engines and some of their high output builds. Not all list injector sizes but some do. I know GMR Performance in the US started selling tested, high output injectors from his shop/website pretty early on when building and tuning M8's because he found those available were not reliable and not sufficient output.
  • Mesmer
    Mesmer
    11 days ago
    Well,  I trust my shop 100%. I was just wanting to know if anyone on here had done that mod as it isn't one I've heard of or could find any info on. 

    These guys do build and race some beautiful drag bikes so I guess I'll continue to put my trust in them. Bet it hurts the fuel consumption though! Lol
  • FBUser214
    FBUser214
    10 days ago
    I have no idea about the LS injectors.
    Can get them from Bosch or unbranded (Chinese) and anywhere in between.
    Many options in the harley world and some are better than others. High performance injectors give better atomisation than others.
    FuelMoto sell Bosch made to custom spec. I use HPI (probably custom spec Bosch) with my HPI throttlebody.
    I build my own motors so I do my own research. Your shop would do the same.

    The answers are not always in the HD Accessories catalogs. More than one way to do an upgrade.
  • Wideglider
    Wideglider
    10 days ago
    Quoting Mesmer on 25 Nov 2021 07:24 AM

    Well,  I trust my shop 100%. I was just wanting to know if anyone on here had done that mod as it isn't one I've heard of or could find any info on. 


    These guys do build and race some beautiful drag bikes so I guess I'll continue to put my trust in them. Bet it hurts the fuel consumption though! Lol

    Hey Mesmer,
    The proof of the pudding is in the eating. 
    As you say, the guys you've entrusted to do your job build & (hopefully successfuly) race their engines - go with their advice. As long as you realise, that in other respects components utilised in drag engines are not always built for longevity. 
    Sure, there is no harm in getting opinions/advice from the forum (it doesn't mean you don't trust your shop), this is the spirit of the forum. You'll find a hundred who claim they build their own motors - in reality it is just a fraction, and with the ones that do, it doesn't necessarily infer any acceptable competence!

  • FBUser214
    FBUser214
    9 days ago
    Participating 'in the spirit of the forum' requires an ability to separate the wheat from the chaff.
    There are those who offer advice based on 'real world' experience, and there are 'keyboard experts', dispensing useless platitudes, who don't know one end of a spanner from the other.