| 421 dyno |
Subject: 421 dyno by 88BlackZ51 on 2011/9/13 3:47:32 I finally had time to throw her on the dyno. The dyno was a DynoJet 224x. I dyno operator mentioned that he recently had a Corvette dyno day where he mentioned that stock LS3's were throwing down 370-380 rwhp. After watching a few cars before mine it seemed that the dyno numbers were a tad on the low side, but either way it didnt matter because this was my baseline. 1st run- Coolant temp around 165 424rwhp@5900 458rwtq@4000 2nd run- Coolant temp around 210 434rwhp@5900 470rwtq@4000 It was very hard to tell exactly what the rwtq peaked at because the torque curve was so flat. There was also an issue with my car because my wires were too think, and the torque rating spiked in some areas, but I will add that at 2500 she made 450rwtq. Also the airfuel stopped working after the 2nd car which was a bummer, but I think I am somewhat close, but it would have been nice to see it. The horsepower peaked at 5900, but stayed flat to 6300 rpm's then started a slight decline to 6500. I was kinda suprised that horsepower curve didnt drop more past 6000, but those heads still kept on trucking. All in all I was pleased. I thought I would have made more rwhp, but I didnt think I would make that much rwtq. I do have to say that I am very impressed with that TPIS miniram intake as it makes power everywhere in the curve, and thats with 3.07's (4+3 still). Many of you wanted to see what the little heads could do, and it is fair to say that these heads are maxed out. Everyone has there own opinion but I dont think this combo is maximized so there is a little left on the table. :D The car was dynoed with the B&B reasonator, B&B mufflers, and 1 3/4 Hooker Headers. I do believe my exhaust is holding me back a tad (15-20rwhp). I will be making some changes and re-attending the dyno for some pulls. All in all the car ran well, but I did notice that I had a header leak after the dyno runs. The car isnt quiet at WOT, and with the fan blowing on the car, it would have been very hard to hear that noise. I am kinda pissed off at myself for not checking the header bolts (bolt actually fell out, and other bolt was loose). Now I am not saying this affected my dyno number, but I do think its worth noting. I am glad I got a baseline.I wanted a motor to run on the street that was snappy and had excellent low, mid, and upper hp, and I got it! Take care guys! -4 Bolt Bowtie block -AFR 195cc Eliminator Comp Ports -11.6 CR. -Callies Crank -JE Pistons solid dome -Crower Rods -TPIS Miniram ported -Comp Cam XE Hyd Roller 236/242 .62x/.58x -1 3/4 Hookers to 3 inch Billy Boat SS exhaust with reasonators and mufflers [IMG]http://i195.photobucket.com/albums/z275/88blackz-51/060.jpg[/IMG] [IMG]http://i195.photobucket.com/albums/z275/88blackz-51/003-1.jpg[/IMG] |
