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Roostfactor’s Equal Length Y-Pipe

Discussion in 'Performance and Tuning' started by 5thGearPinned, Aug 7, 2018.

Page 31 of 40
  1. Oct 16, 2018 at 2:09 PM
    #601
    JWL

    #601
    JWL Well-Known Member

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    Damn I want one of these so bad. I'm kinda pissed I got the URD y pipe and didn't know about this lol
     
    JWL, Oct 16, 2018
    #601
    TitanRattler813, 5thGearPinned[OP], loginfailed[QUOTED] and 1 other person like this.
  2. Oct 16, 2018 at 3:06 PM
    #602
    Roostfactor

    #602
    Roostfactor Well-Known Member

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    I have said that sooo many times about sooo many items.
     
    Roostfactor, Oct 16, 2018
    #602
    Biscuits, TRON, loginfailed and 3 others like this.
  3. Oct 16, 2018 at 3:34 PM
    #603
    Lucario Runner

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    Lucario Runner Resident Truck/SUV racer

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    Ditto
     
    Lucario Runner, Oct 16, 2018
    #603
    Smokehouse, loginfailed, JWL and 1 other person like this.
  4. Oct 16, 2018 at 5:00 PM
    #604
    JacksonTacoma

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    JacksonTacoma Well-Known Member

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    Magnuson SC, 2.5 pulley, hptuner, FPR mod, AFE Intake, URD longtube headers, JFR Y-pipe, 255 Deatschwerks, 76mm TB, Banks 3" exhaust, cam gears
    You got the new URD equal length ypipe or the URD unequal pipe?

    I'll be selling my URD ypipe.
     
    JacksonTacoma, Oct 16, 2018
    #604
  5. Oct 16, 2018 at 5:00 PM
    #605
    JWL

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    JWL Well-Known Member

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    I’m glad I’m not the only one. Sometimes I wish I hadn’t gone down the road of performance upgrades but I must say driving is a lot more fun now after having them done.
     
    JWL, Oct 16, 2018
    #605
    Biscuits, 5thGearPinned[OP], TodayWasTHeDaY and 2 others like this.
  6. Oct 16, 2018 at 5:01 PM
    #606
    JWL

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    JWL Well-Known Member

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    I have the unequal length y pipe. Wait, does URD make an equal length now?
     
    JWL, Oct 16, 2018
    #606
  7. Oct 16, 2018 at 5:27 PM
    #607
    Roostfactor

    #607
    Roostfactor Well-Known Member

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    Its a hobby. All hobbies cost money and time.
     
    Roostfactor, Oct 16, 2018
    #607
    Stryker420 and 5thGearPinned[OP] like this.
  8. Oct 16, 2018 at 5:29 PM
    #608
    Roostfactor

    #608
    Roostfactor Well-Known Member

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    I think he is referring to URD's Spec-U exhaust. It does have an equal length y-pipe but it is not of any tuned length.
     
    Roostfactor, Oct 16, 2018
    #608
    5thGearPinned[OP] likes this.
  9. Oct 16, 2018 at 5:40 PM
    #609
    JWL

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    JWL Well-Known Member

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    I see. I have the competition y pipe like @loginfailed had before you upgraded it
     
    JWL, Oct 16, 2018
    #609
    Roostfactor[QUOTED] and loginfailed like this.
  10. Oct 16, 2018 at 5:54 PM
    #610
    loginfailed

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    loginfailed Well-Known Member

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    I felt the same way after I installed the URD unequal y-pipe. Sounded like crap. I was considering putting the stock stuff back on.

    Thankfully @Roostfactor convinced me that unequal length was the problem and he made the URD y equal length. After experiencing both versions back to back, I wouldn’t recommend anyone run an unequal y-pipe on a 1GR.
     
    loginfailed, Oct 16, 2018
    #610
    Biscuits, Stryker420, JWL[QUOTED] and 5 others like this.
  11. Oct 17, 2018 at 8:51 AM
    #611
    JWL

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    JWL Well-Known Member

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    Other than the sound, how much performance benefit is there in the equal length?
     
    JWL, Oct 17, 2018
    #611
  12. Oct 17, 2018 at 9:23 AM
    #612
    5thGearPinned

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    5thGearPinned [OP] Light Speed

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    It’s pulls harder and carries further throughout the powerband, besides sounding smoother and better, the exhaust pulses are helping each other and not fighting themselves when they merge. Instead of hitting each other at the merge, they are going in single file help pulling the other one through or out is a better way to say it. Roost has figured out the right length and diameter so that the whole pipe is tuned for the optimum rpm range for our engine. It gurgles when you are off the gas and coasting, idling. It’s awesome.
     
    5thGearPinned, Oct 17, 2018
    #612
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  13. Oct 17, 2018 at 9:30 AM
    #613
    loginfailed

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    loginfailed Well-Known Member

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    Basically what @5thGearPinned said.

    On these engines, the left bank and right bank are basically taking turns firing a cylinder. When both sides are the same length, the distance an exhaust pulse has to travel is equal on both sides. So now the pulses are also taking turns at the collector.

    With unequal length, the paths are different distances so you get exhaust pulses arriving at the collector at the same time colliding with each other. When two pulses are trying to squeeze though at the same time it impedes flow.
     
    loginfailed, Oct 17, 2018
    #613
    Stryker420, rmepilot, 5thGearPinned[OP] and 3 others like this.
  14. Oct 17, 2018 at 9:38 AM
    #614
    JWL

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    JWL Well-Known Member

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    That's awesome... Just so much left on the table with the competition y pipe... I hope I can get my finances well enough off to be able to buy one of these things before Roost gets too deep into his 2nd career!! Haha
     
    JWL, Oct 17, 2018
    #614
    5thGearPinned[QUOTED][OP], Roostfactor, jojotoo and 1 other person like this.
  15. Oct 17, 2018 at 11:02 AM
    #615
    Roostfactor

    #615
    Roostfactor Well-Known Member

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    HPT/justDSM tuned factory ecu, URD Headers, JFR Y-Pipe/l 3" exhaust, Walbro 255 fuel pump, Maggy SC (JFR ported), JFR ported lower intake manifold, 76mm tb, 2.5 pulley, 640cc injectors, CSF Radiator, custom electric fan wit Autocoolguy controller, JFR SC pulley wrap mod
    Well said gentlemen. I'm impressed!
     
    Roostfactor, Oct 17, 2018
    #615
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  16. Oct 17, 2018 at 11:19 AM
    #616
    JacksonTacoma

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    JacksonTacoma Well-Known Member

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    Magnuson SC, 2.5 pulley, hptuner, FPR mod, AFE Intake, URD longtube headers, JFR Y-pipe, 255 Deatschwerks, 76mm TB, Banks 3" exhaust, cam gears
    For those of you with this y-pipe already installed, do you have your AFR gauge sensor located in the merge? How much are your AFR readings on the gauge impacted by this location? I currently have the URD ypipe with a single AFR guage reading from just behind the passenger header flange. The aft bung that comes pre-installed from URD on that side. MyAFR at idle and cruise is spot on at 14.7. Wondering what the reading will change to with a bung in the merge on John's pipe.
     
    JacksonTacoma, Oct 17, 2018
    #616
  17. Oct 17, 2018 at 5:52 PM
    #617
    Roostfactor

    #617
    Roostfactor Well-Known Member

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    Do you have stock manifolds?
    I have an afr on each bank near the stock rear o2's. Mine fluctuates between 14 and 15 at idle and cruise.
    If you put yours at the merge you would be reading cumulatively from both banks which is better than one side but not as good as reading from both banks.
     
    Roostfactor, Oct 17, 2018
    #617
    JacksonTacoma[QUOTED] likes this.
  18. Oct 19, 2018 at 11:00 AM
    #618
    BassAckwards

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    BassAckwards Well-Known Member

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    Last edited: Oct 19, 2018
    BassAckwards, Oct 19, 2018
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  19. Oct 19, 2018 at 11:48 AM
    #619
    JacksonTacoma

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    JacksonTacoma Well-Known Member

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    Magnuson SC, 2.5 pulley, hptuner, FPR mod, AFE Intake, URD longtube headers, JFR Y-pipe, 255 Deatschwerks, 76mm TB, Banks 3" exhaust, cam gears
    Not stock, have Doug Thorley Shorties. Just curious how much the AFR reading gets offset moving it back to the merge if anyone with that sensor configuration can chime in.
     
    JacksonTacoma, Oct 19, 2018
    #619
  20. Oct 19, 2018 at 11:51 AM
    #620
    JacksonTacoma

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    JacksonTacoma Well-Known Member

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    JacksonTacoma, Oct 19, 2018
    #620
Page 31 of 40

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