Page 1 of 2 12 LastLast
Results 1 to 25 of 28
  1. #1

    Car exhaust burbles at cruse ROE 710 cam

    I this a normal function caused by the waisted spark and/or the valve timing overlap. It is only at light throttle cruse configuration. I have no decel popping and the plugs look perfect. short and long term fuel trims are within the 10% window.

    Under any acceleration it clears up. most of the time it is at 1500-2500 RPM when you here it.

    Parts in the motor
    710 cam
    Slow bleed lifters
    Beehive springs
    HD pushrods
    Gen 4 head gasket
    Stock valve size but bowl ported (.013 off the heads to make then flat and remove imperfection)CR should be 9.8-9.9
    ROE throttle body
    K&N intake with Unifilters
    Mopar racing 3 inch exhaust (no cats)
    170 Deg T-sat
    93 Roe tune for the above items

    I have not been to the dyno yet, and I can't locate my wideband O2. I may just pick up a new one.

    Thanks for any input!

  2. #2
    ...as in a miss-fire? Have a video?

  3. #3
    It's not a misfire, My ZX-10r has the same thing. It is only under light load, cruse. I just have never felt it in a car. If you start to accelerate any, it clears up.

  4. #4
    Moderator
    plumcrazy's Avatar
    Join Date
    Oct 2013
    Location
    ALL OVER
    Posts
    2,843
    It's all in the tune
    THE IGNORE FEATURE WORKS, TRY IT...

  5. #5
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Quote Originally Posted by plumcrazy View Post
    It's all in the tune
    I would call Roe. I know A+C performance does remote tunes. If they can't figure it out. Hopefully Roe can help you.

  6. #6
    Moderator
    plumcrazy's Avatar
    Join Date
    Oct 2013
    Location
    ALL OVER
    Posts
    2,843
    A&C > roe at tuning
    THE IGNORE FEATURE WORKS, TRY IT...

  7. #7
    VOA Member
    since 2018
    Southern California
    Tech Team
    Dan Cragin's Avatar
    Join Date
    Oct 2013
    Location
    Santa Monica Ca
    Posts
    542
    That's a fairly big cam that does not work too well at low rpm. Because of the overlap, you will get some surging/burbling at low rpm.

    Maybe you could give some more information about exactly what its doing.

    Good luck.
    specialtyperformanceteam.com
    310-597-6295

  8. #8
    Quote Originally Posted by Dan Cragin View Post
    That's a fairly big cam that does not work too well at low rpm. Because of the overlap, you will get some surging/burbling at low rpm.

    Maybe you could give some more information about exactly what its doing.

    Good luck.
    The car runs perfect as long as you accelerate (even under the lightest throttle) MAP shows less that 2, never any surge or burbling. As soon MAP is over 5-6 Hg (60-65 MPH at 1700-1900 RPM) you get the burb! No surging ever! I have seen the same in my ZX-10 motorcycle after a free flow cat-less exhaust and a preformance tune.

    I figured it was just the high Hg along with the valve overlap pulling hot gas back inside the intake. All the fuel trim data looks good I do not have a WB connected up yet.

  9. #9
    VOA Member
    since 2018
    Southern California
    Tech Team
    Dan Cragin's Avatar
    Join Date
    Oct 2013
    Location
    Santa Monica Ca
    Posts
    542
    If your fuel trims are good then burble is most likely not tune related. I think that cam runs around 240 degree's of exhaust duration, so most likely its just a combination of the cam and catless exhaust.
    specialtyperformanceteam.com
    310-597-6295

  10. #10
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Did you get everything figured out on your car? Did you end up go to a Dyno?

  11. #11
    Quote Originally Posted by Hrysler View Post
    Did you get everything figured out on your car? Did you end up go to a Dyno?
    Car is all good, very powerful, dyno next month. I had 504 RWHP before the cam/heads work.

  12. #12
    VOA Member
    since 2013
    Alabama/Tennessee
    99RT10's Avatar
    Join Date
    Oct 2013
    Location
    Armpit of the US
    Posts
    2,466
    Quote Originally Posted by pokeyl View Post
    Car is all good, very powerful, dyno next month. I had 504 RWHP before the cam/heads work.
    Who is doing your tuning? Torrie?
    09 ACR With all the goodies
    99 ACR TT 99 red RT/10 Roe S/C
    97 B/W RT/10 TT 94 RT/10 TT

  13. #13
    Quote Originally Posted by 99RT10 View Post
    Who is doing your tuning? Torrie?
    Canned tune from Roe, custom to my part. Feels very good, If I could find my wide-band O2...
    I have a data logger for all the ODBII, that data is all spot on.

    Adam from Innovative Street Technologies will do any final tune. Dyno at Emerald Coast Motorsports, they did the head work.

  14. #14
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Dyno numbers yet??

  15. #15
    Quote Originally Posted by Hrysler View Post
    Dyno numbers yet??
    Friday 0900 CST

  16. #16
    First pull 592.6 RWHP 662.9 torque
    Second Pull 621.1 RWHP 679.8 torque

    Will post PDF when I get home

    PS... car is very rich 9 to 1 so when we get it leaned out I should be around 650ish

  17. #17
    VOA Member
    since 2013
    Ontario
    J TNT's Avatar
    Join Date
    Oct 2013
    Location
    Ontario,MCVO,PA,OH
    Posts
    1,933
    Nice numbers , congrats !
    White Mamba ,

  18. #18
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Quote Originally Posted by pokeyl View Post
    First pull 592.6 RWHP 662.9 torque
    Second Pull 621.1 RWHP 679.8 torque

    Will post PDF when I get home

    PS... car is very rich 9 to 1 so when we get it leaned out I should be around 650ish
    Wow! Awesome! Mustang dyno?

  19. #19
    VOA Member
    since 2013
    Alabama/Tennessee
    99RT10's Avatar
    Join Date
    Oct 2013
    Location
    Armpit of the US
    Posts
    2,466
    Quote Originally Posted by pokeyl View Post
    First pull 592.6 RWHP 662.9 torque
    Second Pull 621.1 RWHP 679.8 torque

    Will post PDF when I get home

    PS... car is very rich 9 to 1 so when we get it leaned out I should be around 650ish
    That is pretty damn god. That is Greg Good power. Kudos!!!!
    09 ACR With all the goodies
    99 ACR TT 99 red RT/10 Roe S/C
    97 B/W RT/10 TT 94 RT/10 TT

  20. #20
    Last edited by pokeyl; 4 Weeks Ago at 07:29 PM.

  21. #21

  22. #22
    New tune is here, will load tonight.

  23. #23
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Quote Originally Posted by pokeyl View Post
    New tune is here, will load tonight.
    Cool. Let us know how it goes.. would you do cam and heads again? Or Paxton? I'm trying to decide what I will do...

  24. #24
    Quote Originally Posted by Hrysler View Post
    Cool. Let us know how it goes.. would you do cam and heads again? Or Paxton? I'm trying to decide what I will do...
    I have a 2010 SC 370Z, pain to set up but I have been running 10 PSI boost for 7 years now without problems. I did not want the problems with clutch/half shaft/trans... that com with SC vipers. So, Heads/Cam for me.

  25. #25
    Enthusiast Hrysler's Avatar
    Join Date
    Apr 2017
    Location
    Kenosha
    Posts
    152
    Quote Originally Posted by pokeyl View Post
    I have a 2010 SC 370Z, pain to set up but I have been running 10 PSI boost for 7 years now without problems. I did not want the problems with clutch/half shaft/trans... that com with SC vipers. So, Heads/Cam for me.
    I hear you. Do you have a stock clutch? You might need to upgrade that eventually.. i did..I think the half shafts are good just don't like wheel hop. I


 
Page 1 of 2 12 LastLast

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
  •