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RWHP estimate anyone??

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  • #1

    RWHP estimate anyone??

    Hey guys,

    I have been reading this forum for a long time, but have just started posting in it. I am EXTREMELY into my car, it is my life, and its cool how so many of you are here too. Anyways, I have been working very hard late last summer and all winter building my LT1 up (countless hours and $$). All my mods are listed in my sig, 2 weeks till my Dyno appointment, was just wonderin what you guys think I will put down for RWHP. Any estimates on this RWHP or suggestions (besides that obvoius suspension work is needed) are appreciated. Thanx a lot in advance!!
    1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....
    Tags: None
  • #2
    Stock injectors and fuel pump? That could hold you back.
    Tracy
    2002 C5 M6 Convertible
    1994 Z28 M6 Convertible
    Current Mods:
    SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

    Comment

    • #3
      Sorry, forgot to say that I have 36 lb. Venum fuel injectors and a T-Rex in-line fuel pump. anyone have RWHP estimates??
      1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....

      Comment

      • #4
        I would say 390-420 RWHP. It will all depend on what type of dyno and if they correct your numbers or not.

        Comment

        • #5
          I would guess higher than that.

          He has LE2 heads. Lloyd claims his LE2 head / cam package makes 400 rear wheel horsepower on a 350 cubic inch motor.

          Now supercharge that. I would guess 475 RWHP.
          Tracy
          2002 C5 M6 Convertible
          1994 Z28 M6 Convertible
          Current Mods:
          SLP Ultra-Z functional ramair, SS Spoiler, STB, SFCs, Headers, Clutch, Bilstein Shocks, and TB Airfoil. 17x9 SS rims with Goodyear tires, 160F T-Stat, MSD Blaster Coil, Taylor wires, Hurst billet shifter, Borla catback with QTP e-cutout, Tuned PCM, 1LE Swaybars, 1LE driveshaft, ES bushings, White gauges, C5 front brakes, !CAGS, Bose/Soundstream audio, CST leather interior, synthetic fluids

          Comment

          • #6
            Originally posted by TraceZ
            I would guess higher than that.

            He has LE2 heads. Lloyd claims his LE2 head / cam package makes 400 rear wheel horsepower on a 350 cubic inch motor.

            Now supercharge that. I would guess 475 RWHP.
            He's running a Vortech. It's likely not going to be intercooled and 6 lbs just isn't very much boost. He'll probably only see 4-5 at the manifold and this isn't a turbo, so that extra power the supercharger is making ain't free.

            Comment

            • #7
              last year it showed 7.1 psi of boost at the manifold, but this was before the headers and head porting. so I'm guessing 6 psi there now? Geez, I would hope it would be WELL OVER the 400 RWHP mark after all this work, but we will see......
              1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....

              Comment

              • #8
                Originally posted by CrazyLT1
                last year it showed 7.1 psi of boost at the manifold, but this was before the headers and head porting. so I'm guessing 6 psi there now? Geez, I would hope it would be WELL OVER the 400 RWHP mark after all this work, but we will see......
                You'll lose maybe 1lb-1.5lbs with the heads being ported. And not being intercooled is going to really hurt you.

                Intercool it and pulley that thing up. LT1's can safely handle 9 PSI all day long with a good tune.

                Comment

                • #9
                  Originally posted by CrazyLT1
                  last year it showed 7.1 psi of boost at the manifold, but this was before the headers and head porting. so I'm guessing 6 psi there now? Geez, I would hope it would be WELL OVER the 400 RWHP mark after all this work, but we will see......

                  Keep us posted!

                  Comment

                  • #10
                    9 psi. seems a little low for my maximum future boost levels. I heard that stock LT1's can practically do 9 psi. with good tuning. This car has forged pistons/rods, racing bearings, and the compression ratio lowered to about 9:1. I was thinking something a little higher than 9 psi. would be possible in the future given the lower end work in my engine. Just dont wanna pulley-it-up yet cuase I gotta get the suspension/drivetrain beefed up a little more first. Any other comments on RWHP or max. boost possibilities?
                    1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....

                    Comment

                    • #11
                      Originally posted by CrazyLT1
                      9 psi. seems a little low for my maximum future boost levels. I heard that stock LT1's can practically do 9 psi. with good tuning. This car has forged pistons/rods, racing bearings, and the compression ratio lowered to about 9:1. I was thinking something a little higher than 9 psi. would be possible in the future given the lower end work in my engine. Just dont wanna pulley-it-up yet cuase I gotta get the suspension/drivetrain beefed up a little more first. Any other comments on RWHP or max. boost possibilities?

                      I myself would have went with the ATI procharger. Just about the same money, maybe a little bit less and it comes with one or two intercoolers..cant rememeber right now..but yeah i agree with kevin 101%, your next mod should be intercoolers, even if you dont get the smaller pulley just yet. I myself..in your shoes..would get the intercoolers before your dyno. well cant wait to see the numbers, you have worked hard on your motor..i would probably even go up to 10-12 psi..that might be pushing it but you have a nice bottom end. then you will be making $#^! in your pants horsepower. Did you do anything to the top end? i forgot what i read in your sig..i will see here soon. its my ADD, short attention span and no short term memory..i know, i have it bad.

                      ..Edit...okay nevermind, you have "dun up" your top end..you will make nice numbers.
                      -Jeff

                      Comment

                      • #12
                        I was considering doing methanol injection instead of buying an intercooler. Heard it does about the same thing, but for much less $$ than an intercooler. Anyone who has this or heard about it?.......
                        1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....

                        Comment

                        • #13
                          Originally posted by CrazyLT1
                          9 psi. seems a little low for my maximum future boost levels. I heard that stock LT1's can practically do 9 psi. with good tuning. This car has forged pistons/rods, racing bearings, and the compression ratio lowered to about 9:1. I was thinking something a little higher than 9 psi. would be possible in the future given the lower end work in my engine. Just dont wanna pulley-it-up yet cuase I gotta get the suspension/drivetrain beefed up a little more first. Any other comments on RWHP or max. boost possibilities?
                          LOL, that's exactly what I was eluding to. Bone stock LT1's can take 9 PSI at the manifold all day long on a good tune. Your motor should be able to handle significantly more boost. That's why I said pulley that thing up. I don't know how much impeller RPM that Vortech head unit can handle, but I would guess there is probably some room.

                          Comment

                          • #14
                            according to the vortech website, the supercharger that I bought can handle up to 20 psi., or 1,000 cfm
                            1997 Camaro Z28 w/ LT1. SRP forged pistons, Eagle H-Beam forged Rods, 9.2:1 comp ratio. Voretch S-trim supercharger w/ 6 lbs. boost. 36 lb. injecters, T-Rex in-line fuel pump 3:73 gears, Auto w/ Hughes 3,000 stall, transgo shift-kit, LE2 heads + custom cam, 52 mm. tb, Comp. 1.6 rr. + chromemoly pushrods, pacesetter LT's, no cats, Y-pipe, SLP loudmouth cat-back, SLP sub-frame connectors, MSD wires, HI-6R ignition, I think thats it.....

                            Comment

                            • #15
                              Originally posted by CrazyLT1
                              according to the vortech website, the supercharger that I bought can handle up to 20 psi., or 1,000 cfm
                              I cleaned out my PM Inbox again.

                              Comment

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