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My lt1 dyno results...Not too shabby, I think.

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  • #1

    My lt1 dyno results...Not too shabby, I think.

    Just got back from the Superflo chassis dyno today. I made 3 runs with closed Borla (all thru the muffler) and three runs wide open Borla (full cutout).
    I had slightly better results using full muffler.

    My 1995 74K LT1 is near full bolt with the following mods:
    AS&M cold air induction with K&N filter
    Borla stainless steel adjustable catback
    RK sport 1/34 mid length headers
    Bullet muffler in place of catalytic converter
    Elite spark plugs OVC wires
    NGK iridium plugs
    Trick flow elbow
    52MM throttle body
    Throttle body air diverter
    Comp Cams 1.6 roller rockers
    LT4 valve springs and retainers
    March underdrive pulley w/ alt. pulley
    4.10 Ring and pinion
    1LE aluminum driveshaft
    TB coolant bypass
    160 degree t-stat
    Madz28.com tune
    I swear the Zaino helped too

    The Superflo STP corrected numbers were:
    301.5 RWHP @ 5400 RPM
    326.7 RWTQ @ 4100 RPM

    It is obvious from the results and the dark smoke that the A/F ratio is rich at 12-12.4
    I might be losing some power here.




    All in all I am very happy with the results.
    What do you guys think I can get in the 1/4 mile?
    1995 Z28 Convertible, 350ci LT1 73K miles M6.
    Dyno results: 301.5 RWHP 326.7 RWTQ
    Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.
    Tags: None
  • #2
    That RWHP is decent considering your mods. With your T-56, that equates to roughly 350 HP at the crank.

    Does the shop where you dyno'ed it have the ability to tune your car while on the dyno? I can't see your pics BTW.

    Comment

    • #3
      Originally posted by fastTA
      That RWHP is decent considering your mods. With your T-56, that equates to roughly 350 HP at the crank.

      Does the shop where you dyno'ed it have the ability to tune your car while on the dyno? I can't see your pics BTW.
      Picture host server must be down at the moment.
      Yes they can dyno tune for around $350.

      I will contact madz28.com to see if they can get me atune that will lean the motor a bit, its running rich.
      1995 Z28 Convertible, 350ci LT1 73K miles M6.
      Dyno results: 301.5 RWHP 326.7 RWTQ
      Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

      Comment

      • #4
        Nice numbers indeed.
        LS15 Power! Another LSx engine coming soon.

        Comment

        • #5
          Nice! That is about where it should be for those mods.

          Comment

          • #6
            Impressive all things considered. I would be very happy with that.
            SOLD: 2002 Trans Am WS.6 - Black on Black - 6 Speed
            SLP Loudmouth Exhaust
            17K Miles

            2005 Acura TL - Silver on Black
            Navigation - Surround Audio - Bluetooth

            Comment

            • #7
              ahh...the dyno. wish I could get my ride on a dyno. Great numbers by the way...

              Christopher Teng

              1999 · A4 · 3.73's · Auburn LSD · Whisper Lid · K&N · Pacesetter Headers/Y-pipe
              Magnaflow Cat & Catback · MSD Coils/Wires · Bosch +4 Plugs · EGR Bypass
              B&M SuperCooler · 160* Stat · Descreened MAF · SLP CAI · BMR STB & SFC
              Strano Sways · Eibach Springs · Bilstein HD Shocks · Hawk-Pads · Brembo Blanks
              Speedlines · Nitto 555s · Texas Speed Mail Tune

              Lots of Weight Savings · Stubby Antenna · Corbeau TRS · Zaino · 273K

              F-Body Dirty Dozen

              Comment

              • #8
                Nice numbers indeed

                A question...what is a SuperFlo dyno and STP corrected numbers? And how does it differ - if at all - from a Dynojet and SAE corrected numbers?
                94 Black T/A GT, Advanced Induction 355, 3200 stall, built 4L60E, Moser 9", Baer Brakes, Shooting for 11s...

                Comment

                • #9
                  With respect to the Superflow dyno, I need to differ to someone more qualified to answer.

                  This is all I can add:
                  http://www.sracing.com/Store/Chassis_Dyno/cdyno.htm

                  STP corrections are basically the same as SAE using a very slightly different calculation. It has been stated that the STP might add just a fuzz better numbers.
                  1995 Z28 Convertible, 350ci LT1 73K miles M6.
                  Dyno results: 301.5 RWHP 326.7 RWTQ
                  Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.

                  Comment

                  • #10
                    There are basically 2 benchmarks by which dyno operators will correct your actual HP numbers. There is what they call the Standard Correction (STP) which uses the following weather data as it’s benchmark: 60° F, 29.92 InHg, and 0% relative humidity. Then there is what they call the SAE J1349 Revision JUN90 which uses the following weather data as it’s benchmark: 77°F, 29.235 InHg, and 0% relative humidity.

                    Normally tuners and shops will use the standard(STP) correction. Obviously the higher pressure and cooler correction temps in accordance with the STP correction method will cause the output to be higher corrected numbers, but it is by far the most widely accepted correction method.

                    Sometimes they will use the June 1990 Revision guidelines by which to correct, but this is not near as widely used. The SAE correction will cause your numbers to be about 4% lower than the STP "Standard" correction.

                    Comment

                    • #11
                      As I replied on another forum where you posted this, the Superflow can be run in either inertia mode, emulating the Dynojet and producing similar figures, or in eddy-current mode, emulating the Mustang dyno. You need to find out which way they ran it.

                      If you just do the ratio of absolute pressure (29.92/29.235 = 1.0234) and absolute temperature ([77+460]/[59+460] = 1.0347), the STD would produce about (1.0234 X 1.0347 = 1.059) 6% higher results than SAE. That's a simplification.
                      Fred

                      381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motor

                      Comment

                      • #12
                        Nice numbers - and nice car. I had a white 96 Z28 conv't only it had a white top. Loved that car!
                        Silver 02 WS-6, 6 speed, Corsa cat-back, SLP lid, K&N filter, BMR STB, !CAGs, Lou's short stick, MSD wires, MTI "Hammer" cam, ASP underdrive pulley, Hooker LTs, Hooker ORY, Comp 918s, TR pushrods, UMI Sfcs, UMI LCAs, NGK TR55s, Hotchkis springs



                        Dyno'd 4/24: 330.9 RWHP/ 344.8 RWTQ (Before cam, headers, and pulley)

                        Dyno'd 5/1: 383.5 RWHP / 380.5 RWTQ (393 actual RWHP)

                        Comment

                        • #13
                          Here's some good reading:

                          http://www.superflow.com/support/cyc...y.html#Inertia

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