w00t! Check out this dyno!
#1
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w00t! Check out this dyno!
READ NOTES UNDER THE DYNO.
YES, looks like I have a problem. Starting to work through this with Nissan now. Car is BONE STOCK, oil consumption issues notwithstanding. Make note of the dates of each run.
YES, looks like I have a problem. Starting to work through this with Nissan now. Car is BONE STOCK, oil consumption issues notwithstanding. Make note of the dates of each run.
#5
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Originally posted by Road Warrior
you are loosing power eh....according to the dates your baseline should be on the earlier run and not the latter...?
you are loosing power eh....according to the dates your baseline should be on the earlier run and not the latter...?
#6
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Temperature, weather, humidity, elevation, same dyno? Have you changed oil recently? More/less weight in the car? Clean air filter? New spark plugs? New wheels/tires/sizes?
There are a TON of things that can make a dyno do weird $hit man; what does your butt dyno tell you? Less power than when you got it? How did you break in your engine?
I guess the point I'm trying to make is that dynos are inconsistent at best and usually not a very reliable tool from dyno to dyno if not done back-to-back on the same day, and even then most performance mods need to break in a little before they show max gain. I know you don't have any HP mods, just pointing out how finicky dynos can be.
There are a TON of things that can make a dyno do weird $hit man; what does your butt dyno tell you? Less power than when you got it? How did you break in your engine?
I guess the point I'm trying to make is that dynos are inconsistent at best and usually not a very reliable tool from dyno to dyno if not done back-to-back on the same day, and even then most performance mods need to break in a little before they show max gain. I know you don't have any HP mods, just pointing out how finicky dynos can be.
#7
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Originally posted by PoWeRtRiP
how many miles you got? it might just need a tune up you can lose a lot of power with a dirty air filter and used plugs. my .02
how many miles you got? it might just need a tune up you can lose a lot of power with a dirty air filter and used plugs. my .02
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#8
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Thread Starter
Originally posted by bk_r0x
Temperature, weather, humidity, elevation, same dyno? Have you changed oil recently? More/less weight in the car? Clean air filter? New spark plugs? New wheels/tires/sizes?
There are a TON of things that can make a dyno do weird $hit man; what does your butt dyno tell you? Less power than when you got it? How did you break in your engine?
I guess the point I'm trying to make is that dynos are inconsistent at best and usually not a very reliable tool from dyno to dyno if not done back-to-back on the same day, and even then most performance mods need to break in a little before they show max gain. I know you don't have any HP mods, just pointing out how finicky dynos can be.
Temperature, weather, humidity, elevation, same dyno? Have you changed oil recently? More/less weight in the car? Clean air filter? New spark plugs? New wheels/tires/sizes?
There are a TON of things that can make a dyno do weird $hit man; what does your butt dyno tell you? Less power than when you got it? How did you break in your engine?
I guess the point I'm trying to make is that dynos are inconsistent at best and usually not a very reliable tool from dyno to dyno if not done back-to-back on the same day, and even then most performance mods need to break in a little before they show max gain. I know you don't have any HP mods, just pointing out how finicky dynos can be.
A 14 HP loss is staggering considering that NOTHING has changed about the way I take care of the car.
#9
The thing with rims is that its not necessarily that lighter rims reduce rotational mass. Its where on the rim the weight is. For example: if two sets of rims have the exact same weight, but one set of rims has most of the weight in the center, while the other set of rims has most of the weight at the outter edge, then the one with more weight in the outter edge will take more power to spin. Since your rims are 8.5 and 9.5 that means that even if they are lighter, there is more weight in the outer edge of the rims, also, since your tires are 245 and 275 that added additional weight over the stock tires, because of the obvious increase in size. Also, if you have a break-kit where the rotors are heavier than the stock rotors thats additional power lost to the wheels to spin up the rotors.
#12
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Originally posted by Z-*****
Why are people trying to convince him that there's no problem? If it were me, i'd check to be sure, so that I know my **** is running tip top.
Why are people trying to convince him that there's no problem? If it were me, i'd check to be sure, so that I know my **** is running tip top.
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Tell them your motor chokes sometime when you drive it. Bog as we say it...lolz...although its not turbo. And see what they do. Maybe they might do a leakdown test. Who knows. Well have you been running the $hit out of the car lately? If you keep that rev up in the redline range and for long period of time, you might warp the damn rings. Could be losing compression. Definitely persuade your dealer to do a leakdown / compression test. And make up some other $hit such as when you drive for like half an hour or more, at 70 mph, engine makes some popping noises. Just make it up. Cuz I don't think they will take your car out and drive it for 1/2 an hour to find that out. Good luck and keep us all posted!
*I respect the other fellas for saying dynos are different and we do have to take all of the other things in to account. But be smart homie! It's your ride. Make sure it runs "tip top" like Z-***** says.
*I respect the other fellas for saying dynos are different and we do have to take all of the other things in to account. But be smart homie! It's your ride. Make sure it runs "tip top" like Z-***** says.
#17
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What I am concerned with is that is DYNO #07, which was your FIRST run of the day since #06 was most likely your best previously.
MEANING - Your oil temps, etc were NOT up to spec... we've seen a 10hp difference between a first run, and a warmed up run.
How many runs did you make after 07? Show us ALL your runs!
Quit being so dramatic Droid.
*Edit - You're not dyno'g with the stock wheels??? Dude, you're adding in variables. Wheels/tires on a dyno ... KEEP THEM THE SAME. Don't say otherwise!!! Either way, I'm sticking to what I said originally.
MEANING - Your oil temps, etc were NOT up to spec... we've seen a 10hp difference between a first run, and a warmed up run.
How many runs did you make after 07? Show us ALL your runs!
Quit being so dramatic Droid.
*Edit - You're not dyno'g with the stock wheels??? Dude, you're adding in variables. Wheels/tires on a dyno ... KEEP THEM THE SAME. Don't say otherwise!!! Either way, I'm sticking to what I said originally.
Last edited by PhoenixINX; 02-20-2004 at 03:32 PM.
#18
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when's the last time you reset the ECU? That makes a huge difference. I would dyno again, just to make sure.
Your car should be peaking at 20k miles, not the reverse.
Your car should be peaking at 20k miles, not the reverse.
#19
Originally posted by droideka
The air element is changed every time the oil is. I've spent a ton of money on preventative maintenance.
The air element is changed every time the oil is. I've spent a ton of money on preventative maintenance.
#20
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Comparing ONE dyno from ONE day...and ONE dyno from a completely different day when the car was not set-up the same as before doesn't hold much water.
Maybe if you had 4 or 5 dynos one day...and 4-5 the other day and figured an average difference that was more than around 5whp.
I had two pulls in one day within 5 minutes of each other and they were seperated by 5WHP and 7ft/lbs of torque. That's on the same day....get some more dynos....and if you find a huge difference...THEN make a stink...
Maybe if you had 4 or 5 dynos one day...and 4-5 the other day and figured an average difference that was more than around 5whp.
I had two pulls in one day within 5 minutes of each other and they were seperated by 5WHP and 7ft/lbs of torque. That's on the same day....get some more dynos....and if you find a huge difference...THEN make a stink...