Results 1 to 16 of 16

Pushrod length

This is a discussion on Pushrod length within the Internal Engine forums, part of the LSx Technical Help Section category; I'm using a TSP 224R. I'm pretty sure I need 7.400 pushrods but not positive. Can someone confirm?...

  1. #1
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    Pushrod length

    I'm using a TSP 224R. I'm pretty sure I need 7.400 pushrods but not positive. Can someone confirm?

  2. #2
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    Yea, 7.4 should be right. Doesnt hurt to check though.

  3. #3
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    What heads?
    What lifters?
    What rockers?

    No matter what....CHECK!
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

  4. #4
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    Quote Originally Posted by Mr. Luos View Post
    What heads?
    What lifters?
    What rockers?

    No matter what....CHECK!
    Stock heads, stock lifters, stock rockers.

  5. #5
    Senior Member JaycenK's Avatar
    Join Date
    Nov 2008
    Location
    Holiday,FL
    Age
    40
    Posts
    1,378

    Green
    1997 Camaro Z-28

    You can buy a pushrod length checker for a couple of bucks at a parts store.

  6. #6
    SUPREME member-oderator oneBADDz's Avatar
    Join Date
    Nov 2005
    Location
    Lost in Texas
    Age
    34
    Posts
    2,683

    Custom Slate Blue
    99 B4C

    It's best to check,I have seen them range from 7.375 to 7.425 on even stock setups. 7.400 will function, but pushrods not being perfect really contributes to what is so well known as the LS1 sewing machine sound

  7. #7
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005
    Location
    Florida
    Posts
    10,461

    Black
    1999 TA WS.6

    The base circle of that cam shaft should be stock size. But a pushrod length checker is so cheap, it would be foolish not to check real quick.

  8. #8
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    Quote Originally Posted by JaycenK View Post
    You can buy a pushrod length checker for a couple of bucks at a parts store.
    I just got one from Summit Racing for $11.99....its worth it

  9. #9
    King 0f n00bz shady milkman's Avatar
    Join Date
    Jan 2006
    Location
    Shepherd, Michigan
    Age
    29
    Posts
    11,775

    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by Hi-Po View Post
    The base circle of that cam shaft should be stock size. But a pushrod length checker is so cheap, it would be foolish not to check real quick.
    i would be surprised if it wasn't to tell you the truth

  10. #10
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Most aftermarket cams (a few years ago anyways) had a slightly smaller base circle than stock, so you wanted a 7.425" pushrod instead of the stock length.

    This is why you ALWAYS check.

  11. #11
    Awaiting Activation
    Join Date
    Oct 2007
    Location
    NC
    Posts
    635

    SOM
    1998 T.A.

    I measured my stockers when they came out and they were 7.385......

  12. #12
    SUPREME member-oderator oneBADDz's Avatar
    Join Date
    Nov 2005
    Location
    Lost in Texas
    Age
    34
    Posts
    2,683

    Custom Slate Blue
    99 B4C

    Technically the stockers are 7.325, they aren't measured in actual tip to tip length.

    LS7 lifters sit taller because of the internals too, so they require shorter ones than if you don't change the lifters. I just put stock height L92 heads on an LS2 with stock gaskets and LS7 lifters and it needed 7.375. Virtually stock valvetrain noise, not the "typical" sewing machine sound at all.

  13. #13
    cutting and welding mark21742's Avatar
    Join Date
    Mar 2008
    Location
    mercersburg pa
    Posts
    6,443

    hugger orange
    2004

    Quote Originally Posted by oneBADDz View Post
    Technically the stockers are 7.325, they aren't measured in actual tip to tip length.

    LS7 lifters sit taller because of the internals too, so they require shorter ones than if you don't change the lifters. I just put stock height L92 heads on an LS2 with stock gaskets and LS7 lifters and it needed 7.375. Virtually stock valvetrain noise, not the "typical" sewing machine sound at all.
    makes me wonder what size pushrods i'll need with milled heads and ls7 lifters.

    I have the pushrod checker sitting on the table. just screw/unscrew to the right lenght, then measure tip to tip for the lenght I take it?

  14. #14
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    Is there a gauge or a read out of some kind on the length checker or do I need to buy something to measure the length checker? Also when I measure I want the rocker to ride as close to the center of the stem as possible, correct?

  15. #15
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,785

    Red Tint Jewelcoat
    2008 Trailblazer SS

    I have one.
    Kinda a pain in the ass to use, but it is worth its weight in gold.

    You want to make sure it is right.
    I have 7.325" pushrods in my motor. Stock style heads milled .020", TSP LS1 cam, Morel/Lunati lifters, cometic .045" head gaskets.

    There are so many variables, just check it.
    http://www.hardcorels1.com/vbulletin...read.php?t=622

  16. #16
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    Quote Originally Posted by Mr. Luos View Post
    I have one.
    Kinda a pain in the ass to use, but it is worth its weight in gold.

    You want to make sure it is right.
    I have 7.325" pushrods in my motor. Stock style heads milled .020", TSP LS1 cam, Morel/Lunati lifters, cometic .045" head gaskets.

    There are so many variables, just check it.
    http://www.hardcorels1.com/vbulletin...read.php?t=622
    Will do, Thanks.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. pushrod length?
    By Edward-T in forum Internal Engine
    Replies: 8
    Last Post: 10-21-2011, 05:36 AM
  2. pushrod length??
    By Mikat1 in forum Internal Engine
    Replies: 1
    Last Post: 03-15-2011, 10:36 AM
  3. need help with pushrod length
    By SexyTransAm in forum Classic Muscle
    Replies: 2
    Last Post: 01-15-2008, 04:50 PM
  4. Pushrod Length?
    By Pickupman404 in forum Internal Engine
    Replies: 21
    Last Post: 03-02-2007, 06:43 PM
  5. pushrod length help
    By laststaric in forum Internal Engine
    Replies: 1
    Last Post: 07-19-2006, 06:26 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •