552 Ci BBF Alcohol Injected FED Want's to go Blown

Discussion in 'PSI Superchargers Tech Questions' started by dorrisdormouse, Apr 23, 2012.

  1. dorrisdormouse

    dorrisdormouse New Member

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    Hi All.

    Looking to build a blown alky motor for my Front engine dragster.

    The deal is that ive been on about wanting a blower for it for a long time and Friday my mum made me an offer. Im a bigger guy and my mum said that she will put in towards the changes required if I run a 1/2 marathon in October... meaning that I would need to spend alot of time between now and then loosing weight and getting fitter. She knows just how much I want the time and figured it would be a strong motivation.

    So what im looking for is to figure out a blown setup to see if it is feasible.

    What I have already, these are the major points of my current NA 552ci motor:

    Forged 4.5 stroke Scat crank
    Forged eagle rods with arp 2000 bolts.
    Forged flat top pistons
    Frpp SCJ heads - unported
    Victor manifold
    Rons flying toilet injection
    Kaase oil pump
    Solid roller cam specced by Lem Evans - 278*/288* 110*LSA .727" lift i and e with 1.73/1 rocker
    Stock Block
    Ignition is a crane pro billet distributor, MSD 7531 programmable box, MSD HVC2 Coil, crank trigger.

    This is in my slingshot with a glide, 5000 stall convertor, 9 inch axle with 33 spline shafts, spool, 3.89 gears. The car's current PB is an 8.443 @ 157.55mph.

    What im aiming for is a blown car that will run consistant 7.6's - but also be relatively low attrition.

    What im thinking is to go with an aftermarket SVO A460 block, stick with my current crank and rods, change pistons to bring the compression down to around 11:1. Stick with my current heads, but possibly get a little porting done on these. Blower wise i was thinking of running an 871 overdriven 10% with the aim of getting 10-12 psi boost - and im hoping that would get me in the 1100-1200 hp range which i think should be sufficient to run 7.6's. I want to keep the revs certainly under 7500rpm, preferably less than 7000 - but with all the torque the blown motor would make i should be able to fit a longer gear. Does this sound feasible? Im expecting to have to change the cam grind, would I need to run a magneto or could i keep my current ignition system (which was brand new in january).
     
    #1
  2. dorrisdormouse

    dorrisdormouse New Member

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    Here's some pictures of the FED currently

    [​IMG]

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