RebekahsZ Posted May 4, 2013 Share Posted May 4, 2013 Finally taking car to dyno with an LSx specialist. Gonna get baseline and any additional power he can give me. Also gonna tune out as much throttle run-on as I can to get car to compression brake better for autocrossing. Any other pointers? I've never been to a dyno shop before. May13 is the big day. Quote Link to comment Share on other sites More sharing options...
wfritts911 Posted May 4, 2013 Share Posted May 4, 2013 Wooo!! Finally gonna see if that LS2 of yours is actually stock or not. Make sure and get some videos/pictures and post the graphs up for us. -Will Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 4, 2013 Author Share Posted May 4, 2013 Slicks or street tires? Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted May 4, 2013 Share Posted May 4, 2013 Either, but be sure they are inflated properly (or even a few psi above). Low tire pressure can take a chunk of you power out. Other than that, let it warm up by driving it on the dyno before tuning. Quote Link to comment Share on other sites More sharing options...
TimZ Posted May 5, 2013 Share Posted May 5, 2013 Try to make sure you have a constant supply of cool air to the intake, and if you can, monitor the intake air temp and make sure that it's stabilized and as close to the same temperature as possible at the beginning of each run. That last part is probably more applicable for turbos but in general should apply for naturally aspirated as well. If your intake air temps are not consistent run to run you can really start chasing your tail trying to make adjustments. If the dyno is indoors make sure it's well ventillated - you don't want to start diluting your intake air with exhaust fumes! Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 5, 2013 Author Share Posted May 5, 2013 Thanks! Keep it coming. The shop is Fast Lane near Huntsville, AL. Lane Colvard will be doing the tuning. His business shares the dyno at Hinson Super Cars. Quote Link to comment Share on other sites More sharing options...
motomanmike Posted May 5, 2013 Share Posted May 5, 2013 Just keep an eye on your temps during ramp runs and make sure everything is in tip top shape. Look everything over very well between runs. You'll be good. Have fun. Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 5, 2013 Author Share Posted May 5, 2013 I've got lousy stock Datsun gauges, so I'm gonna have to have the operator monitor them, then mark my gauges with sharpies in lieu of gauge replacement (for now). Last time to the strip, my H2O temp gauge said 240, wfritts911 plugged his little box into my data port and found the H2O temp to be 205. I know where normal temp is and I know where it runs when doing a lot of full-power driving, but I don't know where DANGER HOT- OH CRAP SHUT IT DOWN FAST hot is. I'm gonna go thru the drivetrain with a torque wrench and double check all my fasteners before I go too. Are there particular maneuvers he will likely have me do, or just warm it up, get it into 4th gear and nail it? Quote Link to comment Share on other sites More sharing options...
240z72 Posted May 5, 2013 Share Posted May 5, 2013 Watch dyno fails on YouTube ..Lmao...OK maby after. Sorry I'm not helping .... Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted May 5, 2013 Share Posted May 5, 2013 Make sure your fuel pressure stays up at high rpm-if not you are paying dyno time for a problem you missed .I am guilty of this.In a powerful car on the street this is hard to catch.Its cheaper to learn from other peoples mistakes..The dyno will find all the weakness in your set up. Quote Link to comment Share on other sites More sharing options...
TimZ Posted May 5, 2013 Share Posted May 5, 2013 (edited) I've got lousy stock Datsun gauges, so I'm gonna have to have the operator monitor them, then mark my gauges with sharpies in lieu of gauge replacement (for now). Last time to the strip, my H2O temp gauge said 240, wfritts911 plugged his little box into my data port and found the H2O temp to be 205. I know where normal temp is and I know where it runs when doing a lot of full-power driving, but I don't know where DANGER HOT- OH CRAP SHUT IT DOWN FAST hot is. I'm gonna go thru the drivetrain with a torque wrench and double check all my fasteners before I go too. Are there particular maneuvers he will likely have me do, or just warm it up, get it into 4th gear and nail it? Do you know what kind of dyno it is? If its a Mustang then you might be trying tuning individual load points. If its a DynoJet, then you'll likely just do full-throttle pulls in 4th, which is still useful, but requires you to do part-throttle load points on your own. I'm assuming that if you intend to do tuning that you will be logging engine controller data during each run, as well as the dyno data, correct? Do you already have a wideband O2 sensor that you can log? If you do end up doing load points, then its especially important to keep air temps consistent as I mentioned before, both during each load point and from load point to load point, as well as watching coolant temps. Also, pay attention to the actual intake air temperature for the session and if you find that the engine runs differently once you are on the street, check see if there is a difference in the air temps causing it. Edited May 5, 2013 by TimZ Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 5, 2013 Author Share Posted May 5, 2013 I need to check and see what kind of dyno it is. I need to call him this week to talk more about how he wants the car set up. Quote Link to comment Share on other sites More sharing options...
SUNNY Z Posted May 5, 2013 Share Posted May 5, 2013 420rwhp Quote Link to comment Share on other sites More sharing options...
Dans toy Posted May 5, 2013 Share Posted May 5, 2013 Maybe a little generous. 375 mustang dyno / 395 dyno jet as it is. Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 5, 2013 Author Share Posted May 5, 2013 I don't understand the last two posts ,SUNNYZ and Dans Toy (?). Is that the results of your dyno testing or is that your guesses of what I'm making? I bet I'm not making any more than factory, minus the accessories (AC and PS and underdrive pulley that came with the motor), maybe less for my poorly designed, but tight fitting, exhaust. I think my good 1/8 mile times are just a result of the slicks and the 2-step allowing me to let it rip without having to be a good driver/clutch man. The variation of reaction times and mphs show the truth about the driver. I'm eager to get back to the strip, but the next racing opportunity is autocross, so I'm staying set up for that (rear camber/tires). Quote Link to comment Share on other sites More sharing options...
Dans toy Posted May 6, 2013 Share Posted May 6, 2013 I think you hit on most of it. + no cats and a little better air intake filtering. My final guess came from throwing darts at a dyno chart. Quote Link to comment Share on other sites More sharing options...
EastTnZ Posted May 6, 2013 Share Posted May 6, 2013 I'm saying 390rwhp give or take 10 hp with the current engine configuration. And the dyno info looks like it's pretty much been covered. 8 days til we all find out! Quote Link to comment Share on other sites More sharing options...
RebekahsZ Posted May 6, 2013 Author Share Posted May 6, 2013 Was gonna leave 2.5 degrees of camber in back. Is that gonna be an issue? Quote Link to comment Share on other sites More sharing options...
SUNNY Z Posted May 6, 2013 Share Posted May 6, 2013 Was gonna leave 2.5 degrees of camber in back. Is that gonna be an issue? Shouldn't be. Might have to sit in the hatch during the pulls though. Serious. Quote Link to comment Share on other sites More sharing options...
wfritts911 Posted May 6, 2013 Share Posted May 6, 2013 I doubt you will have traction issues, camber shouldn't be a problem. I'm betting around 400rwhp, I think it almost has to have a secret cam, or its just a freak LS2. That or my car weighs a lot more than I think it does. -Will Quote Link to comment Share on other sites More sharing options...
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