1. Join the Community!

    DSMtuners is a massive archive of DSM information - but more importantly, it's a COMMUNITY! Join in and participate with other DSMers, and invite all of your DSM friends to make this place their home. Chat with others, create a build thread, post questions and answers. Get involved! Logging in will also remove many of the advertisements, along with this notice. ;)

Cams

Posted by BLACK'98DSM, Mar 22, 2019

Please Support JNZ Tuning
Please Support STM Tuned
  1. BLACK'98DSM

    BLACK'98DSM Proven Member

    316
    72
    Joined Feb 9, 2019
    Hoover, Alabama
    What size cams came in the stock engine of my car? (1998 2.0) Do the 272/272 cams help or was that a waste of alot of money?
     

    Street Build 908  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    105  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    182  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
    Loading...
  2. Kai Hefner

    Kai Hefner Proven Member

    86
    21
    Joined Jun 21, 2018
    Calgary, AB, Canada
    This thread will tell you what cams you have if you take off the valve cover. https://www.dsmtuners.com/threads/camshaft-identification-information.435135/

    This thread will tell you exactly what cams do. https://www.dsmtuners.com/threads/cam-basics.221200/

    If I'm not mistaken, 272 cams are far too aggressive without upgrading other head components such as springs and lifters. Cams definitely help though, but it's not as straight-forward as going 272/272. You can research different intake/exhaust combos that fit your style of driving.
     

    Street Build 192  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 388  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  3. jinscho

    jinscho Proven Member

    288
    97
    Joined Jun 16, 2017
    Bangor, Pennsylvania
    Keep in mind, the OP has a 420a so the first link will provide very little information for him as those are all 4G63 part numbers.

    272's are not going to be helpful on a 420a with no other mods.
     

    Street Build 2K  12

    1999 Mitsubishi Eclipse Spyder N/T
    fwd · manual · 2G DSM
    Loading...
  4. Kai Hefner

    Kai Hefner Proven Member

    86
    21
    Joined Jun 21, 2018
    Calgary, AB, Canada
    Oops I've gone around assuming again :nono:
     

    Street Build 192  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 388  1

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
    Loading...
  5. Canadian_CD9A

    Canadian_CD9A Proven Member

    431
    116
    Joined Feb 10, 2012
    Winnipeg, MB, Canada
    Cams will be a net negative without any other modifications. They NEED tuning or your driveability will suffer and it will not run well. They should also go with full intake and exhaust modifications, and valve springs are likely necessary. Think of aftermarket parts as a balance - they only work as well as the weakest link (and there are many "weak links" in the 420A). The cams need a supporting cast to improve airflow and some proper tuning, otherwise they just won't make power.
     
  6. BLACK'98DSM

    BLACK'98DSM Proven Member

    316
    72
    Joined Feb 9, 2019
    Hoover, Alabama
    Thanks. But does anyone know what the stock size that came with the car was? I no longer hvae the stock so I can't just look.
     

    Street Build 908  8

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    105  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles

    182  1

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles
    Loading...
  7. ThunderChild

    ThunderChild Supporting VIP

    2,428
    639
    Joined Jan 5, 2012
    Rathdrum, Idaho
    https://www.dsmtuners.com/threads/420a-cam.356080/

    Here you go!
    Generally I wouldn't recommend aftermarket cams for a 420a unless you're going balls-to-the-wall, but try to keep them as mild as possible or source stock cams. I could probably find you a set in a day or two for just the cost of shipping if you needed.
     

    Street Build 106  3

    1990 Plymouth Laser N/T
    fwd · manual · 1G DSM

    229  8

    1987 Toyota Pickup/Hilux
    awd · manual · Misc Vehicles

    Street Build 743  7

    1997 Mitsubishi Eclipse Spyder GST
    fwd · manual · 2G DSM

    Street Build 942  1

    1992 Eagle Talon TSi AWD
    manual · 1G DSM

    Street Build 2K  10

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
    Loading...
  8. DSMPT

    DSMPT Proven Member

    457
    159
    Joined Jun 12, 2014
    Japan / Mexico, Arizona
    248°/240°. according to Brian Crower.

    BC 420A.jpg
     

    Drag Race Build 968  2

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    Street Build 1K  4

    1998 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM
    Loading...
  9. lasthope05

    lasthope05 Proven Member

    914
    205
    Joined Mar 31, 2006
    Philadelphia, Pennsylvania
    There is no real set number so don't get hung up on it. Those values don't mean anything as they drastically different from one manufacturer to another. Even trying to compare stock to aftermarket is useless as theret is no standard . You have to measure actual duration at a certain lift with the stock cams and compare them to aftermarket at that same lift value. With that said, no 264/272/280 cam on the market will actually have those advertised duration numbers.

    Realistically at .040", or .050", lift most aftermarket cams will be in the 200-230° range of actual duration.
     
    Last edited: Mar 22, 2019

Share This Page

Support Vendors who Support the DSM Community
Archer Fabrication ECM Tuning ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications OHM Racing RockAuto SouthBay Fuel Injectors STM Tuned VR Speed Factory WheelWell.com White Shed Speed