Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 29
  1. #1
    Red Baron's Avatar
    Join Date
    May 2011
    Location
    Belvidere, IL.
    Posts
    119
    +1
    1

    4 tec compression?

    '06 rxp. What is good, ok and bad cylinder pressure?
    Also, what is the correct method? Pull all plugs and full throttle? Any help would mean a lot.......Joe


  2. #2
    Good 135-145
    OK 115-135
    Bad less than 115

    Also depends on the OEM cam timing (thats not alway perfect)

    Im fairly fanatical though so you may get varying opinions.

  3. #3
    Red Baron's Avatar
    Join Date
    May 2011
    Location
    Belvidere, IL.
    Posts
    119
    +1
    1
    WangaRXP- thank you for responding. All plugs out, I assume?

  4. #4

  5. #5
    All plugs out, engine cold with wide open throttle.

  6. #6
    Eastside Powersports Slow 91's Avatar
    Join Date
    Sep 2008
    Location
    River Crew CT
    Posts
    4,248
    +1
    544
    i warm mine up first. always about 10+ psi higher of a reading.

  7. #7
    Moderator Snoman's Avatar
    Join Date
    Apr 2006
    Location
    South Chicagoland
    Posts
    14,688
    +1
    846
    Quote Originally Posted by Slow 91 View Post
    i warm mine up first. always about 10+ psi higher of a reading.
    +1.....

  8. #8
    83.0 @ 8400 jhill19's Avatar
    Join Date
    Jul 2010
    Location
    Teays Valley, West Virginia
    Posts
    2,800
    +1
    81
    same here, I thought i had low compression last summer but I read significantly higher on a warm engine

  9. #9
    Red Baron's Avatar
    Join Date
    May 2011
    Location
    Belvidere, IL.
    Posts
    119
    +1
    1
    Consensus is warm more or less! Understand how cam timing would play a roll in cylinder pressure. Which I believe is stock but not certain what is is.I'll report back a.s.a.p...........thanks guys!

  10. #10
    Red Baron's Avatar
    Join Date
    May 2011
    Location
    Belvidere, IL.
    Posts
    119
    +1
    1
    Quote Originally Posted by pandan9 View Post
    I tried to read this for an hour......over my head, sorry! Need more to the point.

Page 1 of 3 1 2 3 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. How Bad is a High Compression (180) on a 4 TEC engine
    By Tomenyt in forum 4-Tec Performance
    Replies: 6
    Last Post: 12-12-2012, 08:51 AM
  2. FS Riva 4-tec valve spring compressing tool
    By Boosted3s in forum Sea Doo Classifieds
    Replies: 13
    Last Post: 10-25-2012, 02:36 PM
  3. FS New Compression Rings for sale for 4-Tec motor
    By wreckingball in forum Sea Doo Classifieds
    Replies: 0
    Last Post: 09-19-2010, 05:21 PM
  4. 4-tec Compression Tester
    By Green Hulk in forum eBay Finds
    Replies: 1
    Last Post: 12-27-2009, 11:16 PM
  5. Compression on 4-Tec Supercharged Engine
    By ramnj in forum 4-Tec Performance
    Replies: 5
    Last Post: 04-22-2006, 08:22 PM

Posting Permissions

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