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Do you really need forged pistons?

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  • #16
    358 on 9psi.... DAMN... what bolt ons.... i want specifics..lol
    1996 beretta w/a 04' 3400 3.5 top end, 42.5lb hr, 180*thermo, t3t4 .63ar 60 trim, LC1 WB, FMIC, greddy rs BOV,TIAL 38mm wastegate,791xv,fidanza,stage III clutch,TG LSD,ffp udp,walbro 255 lph,strut tower brace,22 rear sway,30 front sway,92 5sp tranny,92 subframes,all solid mounts,kyb shocks and struts,eibachs,battery in trunk,tgp map sensor,DHP Powrtuner,euro front and rear and more to come soon...mods sitting in boxes waiting install....zo4 kit,GTU wing,and more..

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    • #17
      Originally posted by betterthanyou View Post
      Not entirely true. The largest factor is going to be fuel ratio and timing while under boost. Thats will be the difference between a failure and a reliable motor. Sure metal flaws might be a factor. But it is not the most important one. Also depending on the temperature of the boosted air you might not have any problems at 15 PSI on one setup but might be overwhelmed at 9PSI on another setup

      Every piston and bearing surface is imediatly suspetable to failure under detonation. Every piston top is going to run excessivly hot under a lean condition even if there is no detonation.

      Heat makes power. But too much melts stuff
      Good points, but also just reinforces what I said. Remember that A/F ratio and timing and air density (temp) are just factors that affect cylinder pressure. Peak cylinder pressures and max HP are reached with optimum A/F ratio and timing. If your other factors aren't right though and you run too hot or too close to detonation then obviously you have to dial back timing and/or add fuel and/or try to cool the air charge and engine down in other ways. I kinda figured that was a given and we didn't need to go into that.
      '97 Grand Prix GT 3800 (sold)
      '00 Grand Am GT 3400 supercharged
      13.788 @ 103.73 mph, 320whp 300 ft/lbs
      Gotta love boost!

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      • #18
        yeah midnight what the hell are you runnin. Those some awesome #s for 9psi
        Clean Feet Pet Clean Up
        Pet Waste Removal Omaha
        We offer dog waste removal and cat waste removal services.
        (402) 320-3824, We service the Omaha, Ne. metropolitan area.

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        • #19
          not too much http://www.v6z24.com/registry/midnightriderz24/4
          [SIGPIC]
          12.268@117... 11's to come!
          turbo 3400: 358whp and 365tq at 9 psi
          ASE Master Technician. GM Certified.
          http://www.youtube.com/watch?v=7ibU1k8UZoo
          http://www.youtube.com/watch?v=GUqJyopd720

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          • #20
            u still obd 2?
            Corey's 95 GP - Engine/Trans installed
            02 GTP - 90* > Failboat
            www.blackbombshell95.com

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            • #21
              if hes running a tgp chip im guessing hes still obd1.....
              1996 beretta w/a 04' 3400 3.5 top end, 42.5lb hr, 180*thermo, t3t4 .63ar 60 trim, LC1 WB, FMIC, greddy rs BOV,TIAL 38mm wastegate,791xv,fidanza,stage III clutch,TG LSD,ffp udp,walbro 255 lph,strut tower brace,22 rear sway,30 front sway,92 5sp tranny,92 subframes,all solid mounts,kyb shocks and struts,eibachs,battery in trunk,tgp map sensor,DHP Powrtuner,euro front and rear and more to come soon...mods sitting in boxes waiting install....zo4 kit,GTU wing,and more..

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              • #22
                i blew the #6 piston at 13-15psi.......

                S...........L...........E...........E...........P...........E...........R

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