Turbo sizing chart!

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  • d3ad1ysp0rk
    Saturns Suck!
    • Apr 2007
    • 3391
    #16
    Originally posted by Silver_R
    Chris, he was completely completely kidding when he said he didnt know the difference...

    but anyhow, with an NA car you need a certain degree of backpressure. that is truth.
    Well, not exactly...

    The terminology is off.

    You want to keep velocity up in an NA app. That is one (of many) NA exhaust principles. This is why after a certain point, going bigger in your exhaust is pointless NA.

    Just making more backpressure will not keep velocity up. The correct pipe size and the least restrictions (which cause "backpressure") will result in the best performance.

    P.S. Thank you Brett, apparently everyone else on this site thinks I'm a dumbass. hah
    - Justin

    99 Saturn SL2 Turbo
    01 Saab Viggen (OEM+)
    95 Lexus SC300 (in progress...)
    06 Honda F4i

      Comment

      • Synical DSM
        Synical DSM
        • Dec 2007
        • 4144
        #17
        Originally posted by d3ad1ysp0rk
        Well, not exactly...

        The terminology is off.

        You want to keep velocity up in an NA app. That is one (of many) NA exhaust principles. This is why after a certain point, going bigger in your exhaust is pointless NA.

        Just making more backpressure will not keep velocity up. The correct pipe size and the least restrictions (which cause "backpressure") will result in the best performance.

        P.S. Thank you Brett, apparently everyone else on this site thinks I'm a dumbass. hah
        Actually you do not need or want backpressure!! You want scavenging, which helps velocity. Backpressure hinders performance.
        1995 Eclipse GST - ~~~~
        ...in project mode

        1999 Eclipse GST winter beater ----
        Evo 3 16g
        3" turbo back Thermal R&D exhaust
        ECMLink
        hard upper intercooler pipe
        Tein/AGX suspension
        Other crap
        217k miles

          Comment

          • Synical DSM
            Synical DSM
            • Dec 2007
            • 4144
            #18
            Originally posted by Silver_R
            Chris, he was completely completely kidding when he said he didnt know the difference...

            but anyhow, with an NA car you need a certain degree of backpressure. that is truth.
            Not the truth. So if i had a 5 inch exhaust on my civic, but i had a restiction on the end that caused backpressure id be okay.. nope.

            What you need is scavenging and velocity. People confuse backpressure with scavenging.
            1995 Eclipse GST - ~~~~
            ...in project mode

            1999 Eclipse GST winter beater ----
            Evo 3 16g
            3" turbo back Thermal R&D exhaust
            ECMLink
            hard upper intercooler pipe
            Tein/AGX suspension
            Other crap
            217k miles

              Comment

              • Synical DSM
                Synical DSM
                • Dec 2007
                • 4144
                #19
                Furthermore. How much packpressure do nascar car have. None. What they do have is exhhaust manifols that utilize scavenging and velocity.
                1995 Eclipse GST - ~~~~
                ...in project mode

                1999 Eclipse GST winter beater ----
                Evo 3 16g
                3" turbo back Thermal R&D exhaust
                ECMLink
                hard upper intercooler pipe
                Tein/AGX suspension
                Other crap
                217k miles

                  Comment

                  • d3ad1ysp0rk
                    Saturns Suck!
                    • Apr 2007
                    • 3391
                    #20
                    Originally posted by Broken Civic
                    Actually you do not need or want backpressure!! You want scavenging, which helps velocity. Backpressure hinders performance.
                    Okay this is just getting ****ing stupid.

                    Learn to read.
                    - Justin

                    99 Saturn SL2 Turbo
                    01 Saab Viggen (OEM+)
                    95 Lexus SC300 (in progress...)
                    06 Honda F4i

                      Comment

                      • bayside blue
                        LOADING SWAG: ███████]99%
                        • Sep 2008
                        • 6929
                        #21
                        Originally posted by Matty S2K
                        i heart turbos
                        +1
                        -13 FRS
                        -93 BMW 325is
                        sigpic No boost jones

                          Comment

                          • Synical DSM
                            Synical DSM
                            • Dec 2007
                            • 4144
                            #22
                            Originally posted by d3ad1ysp0rk
                            Okay this is just getting ****ing stupid.

                            Learn to read.
                            I agreeing with you man. Relax!!
                            1995 Eclipse GST - ~~~~
                            ...in project mode

                            1999 Eclipse GST winter beater ----
                            Evo 3 16g
                            3" turbo back Thermal R&D exhaust
                            ECMLink
                            hard upper intercooler pipe
                            Tein/AGX suspension
                            Other crap
                            217k miles

                              Comment

                              • Synical DSM
                                Synical DSM
                                • Dec 2007
                                • 4144
                                #23
                                Originally posted by bayside blue
                                +1
                                +5,000 .... I miss boost so much... :'(
                                1995 Eclipse GST - ~~~~
                                ...in project mode

                                1999 Eclipse GST winter beater ----
                                Evo 3 16g
                                3" turbo back Thermal R&D exhaust
                                ECMLink
                                hard upper intercooler pipe
                                Tein/AGX suspension
                                Other crap
                                217k miles

                                  Comment

                                  • Boosted Euro
                                    Admin
                                    • Oct 2006
                                    • 27801
                                    #24
                                    My head hurts...
                                    You ain't got no chance to beat it..like a man with no hands and a one inccchhhh .

                                    04 Forester XTI - Built Motor (weisco,eagle,sti,arp) FP Green Hta 330whp
                                    83 Rabbit GTI - Scrapped, Heart lives on in the 82
                                    82 Rabbit Diesel L custom - full GTI swap , built head lots of Poly
                                    90 Corrado G60 - First Love , awaiting winning lottery #'s

                                    Anti-Speedbump Society

                                      Comment

                                      • Zoom6
                                        Admin
                                        • Oct 1985
                                        • 5216
                                        #25
                                        i guess i'm an idiot... i have no idea how to read that chart. lol.
                                        Owner - Fully Assed Graphics
                                        sigpic
                                        PM me for vinyl graphics!

                                        -Andy - Drunk Crew Member #003


                                        Originally posted by EuroTrash
                                        I can only imagine the conference calls and work that it took an engineering team to develop butthole seeking technology for this to accurately target a puckered starfish with a warm blast of water.

                                        I'm sure a few have PTSD from testing.
                                        2006 Mazda6s 3.0L V6 - Click here for my build thread... http://nemotorsport.com/boards/showthread.php?t=12369

                                          Comment

                                          • Synical DSM
                                            Synical DSM
                                            • Dec 2007
                                            • 4144
                                            #26
                                            Originally posted by Boosted Euro
                                            My head hurts...
                                            Midol? Lol
                                            1995 Eclipse GST - ~~~~
                                            ...in project mode

                                            1999 Eclipse GST winter beater ----
                                            Evo 3 16g
                                            3" turbo back Thermal R&D exhaust
                                            ECMLink
                                            hard upper intercooler pipe
                                            Tein/AGX suspension
                                            Other crap
                                            217k miles

                                              Comment

                                              • [cerberus]
                                                Senior Member
                                                • Oct 2008
                                                • 731
                                                #27
                                                Originally posted by Zoom6
                                                i guess i'm an idiot... i have no idea how to read that chart. lol.
                                                You are not the only one, and I am willing to bet some other people can't either, but don't want to admit it.

                                                  Comment

                                                  • d3ad1ysp0rk
                                                    Saturns Suck!
                                                    • Apr 2007
                                                    • 3391
                                                    #28
                                                    X axis is power in PS (HP = PS * 0.98632, so VERY similar values).

                                                    Y axis is a list of companies that make turbos

                                                    Dots are turbochargers from those companies. You would look up how much hp you want, and pick a turbo in that range.
                                                    - Justin

                                                    99 Saturn SL2 Turbo
                                                    01 Saab Viggen (OEM+)
                                                    95 Lexus SC300 (in progress...)
                                                    06 Honda F4i

                                                      Comment

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