jnjdragracing Posted January 29, 2006 Share Posted January 29, 2006 Well all I can say is the Dyno pulls are real, no more guessing at horsepower or estimating. The truth is the truth. I would rather know the rwhp anyway, that is real world. I am in process of posting video footage and graphs on my website now. www.jnjdragracing.com. Besure to check them out. I have the full 13 passes on video along with some od them broken out. Well the first two pulls only showed us with 453 rwhp, with 432 ftlbs torque. Made some changes with timing because the air / fuel was dead on, no need to change jetting. Timing change netted us another 55hp, total now is 518 rwhp, with 449 ftlbs torque. Worth the price of the dyno. Messed with the nitrous / intercooler at 20% nos and wow netted us another 133hp. Bringing the total to 651 rwhp, with 571 ftlbs torque. Wanted to play with boost, but the pulley I wanted to try would not fit good, and was running out of time. Did make one more dyno run with the mufflers on and lost 15 hp. We were really stressing the Z-car, look at the videos, blew or had a flat tire after the 3rd dyno pull, fixed and remountend then had to take back off and rebalanced and readjusted the car. It was alot of work but worth it. Plan on going back in a couple of weeks and play with boost. We are pushing 14psi now and with pulley change should be around 28psi. Website is still updating, it says two more hours so I guess check back with it tomorrow. Quote Link to comment Share on other sites More sharing options...
Guest strokerZ Posted January 29, 2006 Share Posted January 29, 2006 WICKED!! Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted January 29, 2006 Author Share Posted January 29, 2006 WebPage is up and running now. All Dyno pulls are posted and also have some broken out in diffirent video segments. I also posted the dyno graphs just two of them best hp vs nos and hp vs mufflers. The supercharger like to be turned up on rpm, so the harder we turn it the more hp we make. We stopped at 6800 rpm but I know it will make power up to 7500 rpm. We are well over the 700hp mark on 20% nos if we turn it up on rpm also. Not to bad and at least we know what to do to make more hp now. We will be back at the dyno with the other pulley and will play with boost and maybe a 30% - 40% charge of NOS. Wish us luck..... See ya at SEZ shootout in March, can't wait....... John Quote Link to comment Share on other sites More sharing options...
v8dats Posted January 31, 2006 Share Posted January 31, 2006 wow nice numbers! love the blower love the spray love the car!! Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted January 31, 2006 Share Posted January 31, 2006 Great to hear and see another roots blower in action....... LARRY Quote Link to comment Share on other sites More sharing options...
Twoeightnine Posted February 1, 2006 Share Posted February 1, 2006 At work, every friday, we call it "quarter mile Friday"! We crank up the speakers, slap on your quartermile run. The one where the monster pulls a 100 foot wheelie. And let er rip!!! The perfect drag Z. Keep up the good work! Twoeightnine Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 1, 2006 Share Posted February 1, 2006 I'd like to clarify something jnj. I was digging through some of your older posts and you were estimating 750 hp based on an ET calculator, but dynoed 453 in the same state of tune? I'm just asking because I've been wondering about the accuracy of calculating hp using ET mph and vehicle weight. Any thoughts on that? BTW, you still have twice as much power as me, so I've got a severe case of hp envy either way you calculate the hp... Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted February 1, 2006 Author Share Posted February 1, 2006 yeah I know, we were running a 390 gear ratio then, now we are running a 354 gear ratio, All I know is the Dyno is a humbling experience and real life. On the Dyno, it is messuring rear tire horse power, and they do it in drive only a 1 to 1 ratio, but the car assorbs hp, like the trans eats it up, the converter takes some, the drive shaft takes some, then the rear end takes some, then the half shafts with u-joints takes some, then the tires/ slicks asorbs some. All I know is the harder we turn it the more HP it makes. SEZ shoot out will show and tell all. We are hoping and going to try to dip in the high 8's in the 1/4 mile. We will be shifting at 7000 rpm in the 1/4, before we were shifting at 6500 rpm. Ask my brother, he is the one who messes around alot with the HP calculator. Email him at jerry@jnjdragracing.com. We will try the little pulley at SEZ, should pump us up to about 18 - 19 pds boost. Quote Link to comment Share on other sites More sharing options...
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