355 dyno with raised rev limiter? | Page 3 | FerrariChat
Buy

355 dyno with raised rev limiter?

Discussion in '348/355' started by INTMD8, Dec 8, 2009.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

Page 3 of 3
  1. INTMD8

    INTMD8 F1 Veteran
    Owner Silver Subscribed

    Jun 10, 2007
    6,815
    Lake Villa IL
    #51 INTMD8, Dec 11, 2009
    Valvetrain high speed video certainly is interesting to see.

    I'm suprised the 355 runs a dual spring for how little mass it needs to control.

    Do you have the specs on them as far as ID/OD installed height seat/open pressure and rate?
     
  2. UConn Husky

    UConn Husky F1 Rookie

    Nov 11, 2006
    4,425
    CT
    Full Name:
    Jay
    #52 UConn Husky, Dec 11, 2009
    Last edited by a moderator: Sep 7, 2017
    Here's the valve spring data from the WSM, Vol 1.

    Just to translate a bit in case it isn't obvious, 'L' is length in mm, 'N' is force in Newtons. Wire diameter is 3.3 mm on the outer, 2.2 mm on the inner. These are TINY little springs thanks to the small valves they need to control.
    Image Unavailable, Please Login
     
  3. INTMD8

    INTMD8 F1 Veteran
    Owner Silver Subscribed

    Jun 10, 2007
    6,815
    Lake Villa IL
    #53 INTMD8, Dec 11, 2009
    Nice, thanks for posting that.

    Translated into numbers I'm more used to looking at (if I'm reading it correctly)-


    1.13in installed height- 64lbs seat pressure

    .76in open height- 156lbs over the nose

    Is cam lift .370in?

    Any diagrams showing spring/retainer outer diameter and valve stem diameter?
     
Page 3 of 3

Share This Page