pm me to discuss more...

 

then how does that explain the guy with the APS ST who lives around triji and me who dynoed 400 on that same dynodynamics dyno at Dynocomp then dynoed 446whp or whatever it was on a dynojet at Dynochip? He said it was a 11.7% difference actually

Not only that but when I dynoed at Dynochip over a year ago when I was NA, I made 262whp, then I dynoed at another dynojet place and made even more power (281whp) - and it was hotter outside with the car unchanged


and 11-11.5 is not all that lean. If it was on 100% pump gas then it could use maybe a few more notches of fuel, but Triji was running 98 octane right?



and I forgot, pinnacle Nissan might not work on an infinit car, but that particular dealer is a nissan/infiniti dealer so they should I'd think. It does only take 5 min. It's true though that the 2004.5's and higher can't have idles adjusted...sorry forgot about that

 

dude, listen to your numbers...you made 281 at the wheels on a car that's rated at 280 at the flywheel? I'm not trying to argue, just stating facts. Were the dyno SAE corrected...when was the last time they were calibrated...here's a vid of my G before i sold it...just so you know I'm not some TRUCK owner who thinks he knows everything....this was on a DynoJet @ 6lbs http://videos.streetfire.net/categor...424F341203.htm

 

no, but 14:1 (which is was I said --at 6500 rpm) is. And that's the one place you don't want to run lean...

 

well first of all I drive a Z, not a G so 287hp is what my engine is rated at with the flywheel

2nd, flywheel hp CAN be increased. It is not a wall limit of what the engine can do. It is a ceiling for the STOCK engine though with all stock parts.

It's a measurement at the crank. The stock engine is rated with the stock cams, with the stock throttlebody, with the stock plenum, with the stock crank pulley, stock timing, etc. When you change the engine itself and how aggressive it runs, it's no longer the same engine -it'll make more power if that's how you set it up

Yes it's a measurement done just to measure the engine itself, but if you change the engine parts and how it runs, then the flywheel hp will actually change.

My car was far from stock (intake, TB, plenum, cams, headers, HF cats, exhaust, tilton flywheel, UR crank pulley, and a more aggressive ECU flash with more timing than stock. etc etc etc

flywheel hp is not a ceiling. It just isn't
I'm happy to go into a LOT more detail about the physics of how torque is measured vs the combustion. The combustion is what is least likely to change, but even that changes when you start changing cams and the amounts of air and fuel. The combustion itself becomes stronger - hence more power, hence it turns the crankshaft harder/faster, hence a higher torque number measured at the crankshaft - hence the hp conversion with frequency/rpm factored in....hence more whp as measured on a dyno

 

look at his A/F - that's a spike, not a normal tune. I will bet money another graph doesn't show that spike

I don't care how far anyone's injectors or tune are ever off, you don't go from 11 to 14 over 100 rpms. Is it even physically possible? it was a burp due to the throttle suddenly shutting down

 

well, then let's see that graph...because the numbers he's showing us are because of that spike...

 

the A/F chart - reading from the right side of the graph
left side is for boost
it's all within range. The only reason to smooth it out is for smoother throttle response and smoother running and more consistency.

11-11.5 is perfectly acceptable
might have to retune during the winter though cause it'll lean out when it gets colder

I bet what that spike really was, is that when the throttle was suddenly let off, the exhaust air that was still exiting out of the engine was still there trapped in the exhaust. There was no more gas going into the engine - and since the measurement is taken at the tailpipe what you're seeing is a sorta slight delay. I bet the A/F gauge inside the car read slightly richer when it spiked. The A/F ratio inside the engine when that spike occured I bet would be perfectly fine - around 11-11.5, but with no gas and an exhaust still full of air, it spiked lean

meaning if you could mount a A/F gauge inside the cylinder chamber, it'd probably read fine. Tailpipe A/F readings are the least accurate

 

That spike is when he shut her down... This is a 5AT remember... Sentry is right, that is totally letting off the gas...

And yes I was running 96 - 98 octane.

Where is Dynochip Sentry? there is one easy way to put this to rest...

I'll just go get a dyno run on a dynoJet and post up the numbers...

 

dynochip is on 54th street between chandler and ray - like where we met kinda only down the street more in the industrial area

http://www.arizonadynochip.com/Default.asp

keith is the guy who ran the dyno and owned the shop back then. You just have to email or call him and schedule a dyno. It was $60 for 3 pulls when I was there

 

Wow thats pretty cheap

 

Cool, I'll set it up hopefully w/ in the next week.

 

I dont think thats true. only the 2004.5 wasnt able to raise the idle. There's a person on here with a 06 AT that had their idle raised.

 

oh ok, I haven't kept up with the 2006 model

 

Ok, change of plans...

My SSV came in so I am going to get that installed and tuned this friday... I will post the Dyno's on the Crawford -VS- SSV when FI'd by Vortech this weekend to put that debate to rest...

I also need to get tuned to 91 octane rather than the 98 I am tuned for now so that will play into the numbers a bit I would think...