Anyone running the new 12.5 lb SHOsource flywheel

Discussion in 'Engine, Intake, Exhaust and Drive Line' started by zak, Mar 11, 2017.

  1. zak

    zak SHO Member

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    I noticed on SHOsource's site that they now list a 12.5 lb flywheel by Fidanza. I ran the 8 lb SHOshop flywheel for many years, and it did ok in starting from a stop and definitely made it rev quicker, but am thinking of running something intermediate (this 12.5 lb aluminum one, or the 17 lb forged steel one).

    Anyhow, curious if anyone is running this new one it looks beefier than the older design.
     
  2. Devin

    Devin SHO owner

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    I've always wanted a lightweight flywheel but never ponied up for one. Good to see they are back under production.
     
  3. black92

    black92 SHO Member

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    I like my Fidanza flywheel. I was not aware they made any changes? IIRC when I purchased mine it was advertised as 9 LBS, but I never weighed mine to confirm. Either way I believe Fidanza is a well established company that will be around for a while to offer replacement parts. I can purchase a replacement disc and also have it ground locally regardless if SHO Source is still in business. (I am sure a SHO Source flywheel can be serviced by an experenced grinding shop, but thats not how SHO Source advertises it).
     
  4. zak

    zak SHO Member

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    What is amazing is the sheer number of c0mpanies making Al flywheels for the SHO, at least according to SHOsource's site. I think they are even reproducing the old SHOshop 8 lb one.

    Back to the question at hand, anyone tried the newer Fidanza design 12.5 lb unit?
     
    Last edited: Mar 15, 2017
  5. black92

    black92 SHO Member

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    I suggest you reach out to SHO Source.
    Fidanza advertises 9.5 lbs. Maybe thats without an insert?
    I am sure SHO Source will gladly explain there 12.5 lbs claim.
     
  6. tompumped

    tompumped SHO Member

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    My old shoshop flywheel I keep as a paperweight, weighs 7lbs 8oz. According to shosource there are replacement discs available for them.

    It's a poor design the screws are threaded into the aluminum and they get seized/corroded. Maybe antiseize or weak loc tite would be good what've been the right thing to do.
     
  7. zak

    zak SHO Member

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    This might be an issue of actual part weight vs. shipping weight.
     
  8. shopartsnw

    shopartsnw SHO Medic Staff Member Sponsoring Vendor

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    Zak

    In your case, I would definitely recommend our SHO Source billet steel flywheel. The steel flywheel is lighter and stronger than stock, and I have yet to see anyone warp one from excessive horsepower.

    Although our aluminum flywheel is also extremely well built, and in my opinion better than any of the competition, I don't recommend aluminum flywheels on higher horsepower cars (anything over 300hp). The aluminum is easier to slip and warp. Once it starts even a little warp or chatter, the extra horsepower will cause even more slip and you can quickly warp the insert bad enough it will need resurfacing.

    I ran an aluminum flywheel in a moderately built (250ish at the wheels) for 40-50k as a daily driver and never had a problem. We tried a well broken in aluminum flywheel in the blower car, and we able to warp and destroy the insert in about one 20 minute track session.

    If anyone has questions on flywheels (ours or others), I am more than willing to go into fine details if you want, but I don't want to hijack your thread unless you want me to go there.

    Mike (SHO Source)

    P.S. I have seen a few people comment on whether or not SHO Source is still in business, and we most certainly are. In fact, we are even working on a handful of new products that we will add to the site soon. SHO Source plans to stay with it for the long haul.
     
    98SF19, F.X.5, AREA 91 and 3 others like this.
  9. black92

    black92 SHO Member

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    Mike,
    What is the actual weight of the current offered fidanza flywheel? And is it any different then a previously offered flywheel by fidanza?
     
  10. SHOdded

    SHOdded SHO Member

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    :thumb: :thumb:
     
  11. zak

    zak SHO Member

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    Thanks Mike, guess my question was whether the 12.5 lbs listed for the Fidanza flywheel was correct, as it looks beefier then earlier Al flywheels. I will not be running a blower, just 3.3 with a custom high torque, dual intake pattern camshaft setup.
     
  12. RJ-92

    RJ-92 SHO Member

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    I have a 3.2 with all the bolt-ons and stage II cams and N2O. I've been running the 17Lb lightened steel flywheel. Probably have about 40K miles on it. Never had an issue. It grabs well, is durable and revs up pretty quickly.
     
  13. chrism3784

    chrism3784 SHO Member

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    i have 12.5 fidanza flywheel, ran for 6 years or so. only problem is one of the bolts striped and it chattered when releasing clutch. didnt know till i changed a clutch and noticed one bolt kept spinning. i took to machine shop and they threaded new thread in, is perfect now.
     
  14. Shamwow

    Shamwow SHO Member

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    On the Charnal House MetSHO, we just cut the mass ring off the stock flywheel in a lathe. Ended up at 18lbs after balancing and had held up very well under our endurance racing
     

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