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-   -   Dyno quirks - three cars with mods and no gains show on dyno, gotta be the heat! (http://www.the370z.com/intake-exhaust/22627-dyno-quirks-three-cars-mods-no-gains-show-dyno-gotta-heat.html)

'10Anamoly 07-26-2010 08:19 AM

Dyno quirks - three cars with mods and no gains show on dyno, gotta be the heat!
 
So James (Z1804), Daisuke and I re-dyno'd our cars last Saturday and its funny because we did not show any significant gains on the dyno per se for any of us. He had Stillen Gen 3 intakes installed, Dai had a full catback exhaust (Ebay) and I had a 2.5" full Fast Intentions x-pipe going to the stock muffler and tips since my previous dyno.

We could all tell though that each of our cars were pulling significantly harder than before. However, the difference in the temps and humidity though was from 84 degrees and 30% humidity on the first dyno day to Saturday's 104 degrees with about 74% humidity.

Interesting to see how much difference the temps and humidity make for power output. I drove the car later at night when it was about 85 degrees and less humid and it was a whole different animal. Dai and James noticed the same thing to a large extent.

Lemers 07-26-2010 08:22 AM

Put all the mods on one car a see if you have any gains.

Abdiel 07-26-2010 09:00 AM

Playing with an online hp calc, those atmospheric condition differences could cause 5-6% hp drop.

Zsteve 07-26-2010 09:08 AM

thats interesting stuff, didnt kow humidity would do that. I know I lost some HP by going from GA to TX due to being higher in the air now. Mile high here.

Jordo! 07-26-2010 10:04 AM

Quote:

Originally Posted by Zsteve (Post 644832)
thats interesting stuff, didnt kow humidity would do that. I know I lost some HP by going from GA to TX due to being higher in the air now. Mile high here.

More humidity, higher altitude, and greater heat all mean less available oxygen, and therefore less power.

Just curious, but are you giys looking at SAE corrected numbers -- won't necessarily compensate, but should give you a better idea what you were putting down.

HKYStormFront 07-26-2010 10:08 AM

it was so hot and humid that day it was hard for me to breathe, i can only imagine what it's like for a car trying to put down #'s.

RCZ 07-26-2010 10:53 AM

Cool, I'm not too surprised.

tjlazer 07-26-2010 11:01 AM

I'm sure it does matter. I just did another dyno after adding a CAI and only got 5hp increase. And it was about 20 degrees hotter. Would like to see what it puts down at the same cooler temps but I ain't paying another $60 to see. Gonna put on my CBE and HFC for the next one!

Z1804 07-26-2010 11:47 AM

Since Stillen claim and 18 hp gain which I don't believe. I really wanted to see what the actual gain was. I estimated 10 hp. I'll dyno it again next week before installing my Boombop Shop Exhaust.

daisuke149 07-26-2010 12:47 PM

Quote:

Originally Posted by '10Anamoly (Post 644764)
So James (Z1804), Daisuke and I re-dyno'd our cars last Saturday and its funny because we did not show any significant gains on the dyno per se for any of us. He had Stillen Gen 3 intakes installed, Dai had a full catback exhaust (Ebay) and I had a 2.5" full Fast Intentions x-pipe going to the stock muffler and tips since my previous dyno.

We could all tell though that each of our cars were pulling significantly harder than before. However, the difference in the temps and humidity though was from 84 degrees and 30% humidity on the first dyno day to Saturday's 104 degrees with about 74% humidity.

Interesting to see how much difference the temps and humidity make for power output. I drove the car later at night when it was about 85 degrees and less humid and it was a whole different animal. Dai and James noticed the same thing to a large extent.


going by when we both did our baseline, we had similar numbers..

if all else is equal then (tho there will be variances)

the Exhaust showed similar gains / results in the top end as the Gen III. Going to have to compare how the full curve goes for us both old vs new.

and yeah. can def feel a big boost in the way it pulls.

370Zsteve 07-26-2010 01:01 PM

Quote:

Originally Posted by Jordo! (Post 644868)
More humidity, higher altitude, and greater heat all mean less available oxygen, and therefore less power.

Just curious, but are you giys looking at SAE corrected numbers -- won't necessarily compensate, but should give you a better idea what you were putting down.

SAE correction is not gonna do much in that heat, agreed.

I saw almost identical numbers when I dyno'd in the heat a few weeks back after a Gen3 install. Waste of my time and money that day for sure. Then again if the numbers were correct, I have a nice power gain from the Gen3s, all things considered.

370Zsteve 07-26-2010 01:03 PM

Quote:

Originally Posted by Z1804 (Post 644944)
Since Stillen claim and 18 hp gain which I don't believe. I really wanted to see what the actual gain was. I estimated 10 hp. I'll dyno it again next week before installing my Boombop Shop Exhaust.

If a CAI is installed as the first mod, you will see dramatic gains. Same thing if you dyno after any "first mod". Everything else is incremental.

Zsteve 07-26-2010 01:20 PM

Quote:

Originally Posted by 370Zsteve (Post 645031)
If a CAI is installed as the first mod, you will see dramatic gains. Same thing if you dyno after any "first mod". Everything else is incremental.

till you get the SC or TT mod

'10Anamoly 07-26-2010 01:26 PM

Quote:

If a CAI is installed as the first mod, you will see dramatic gains. Same thing if you dyno after any "first mod". Everything else is incremental.
Actually thats all James had done was the Gen 3 install and he had like 1hp gain from the last dyno peak and little to no gains throughout, again its due to the heat and humidity.

If the loss is 4% to 5% reasonably for the atmospheric changes, then we all should be right on the money for gains. 276whp with 4.5% added in would be about 288-289whp which makes sense for a full exhaust or Gen 3 install up from baseline of 276-277whp.

I'm not going to dyno again though until its a reasonable 80ish degrees, now that I got rid of that crap OEM muffler. It feels like the same gains I got with the X-Pipe added in again with straight through Magnaflows added and the rear muffler gone. Hoping for 285-290whp, it definately is fast now.

370Zsteve 07-26-2010 01:42 PM

Quote:

Originally Posted by Zsteve (Post 645051)
till you get the SC or TT mod

:icon18:
:roflpuke2:

370Zsteve 07-26-2010 01:49 PM

Quote:

Originally Posted by '10Anamoly (Post 645065)
Actually thats all James had done was the Gen 3 install and he had like 1hp gain from the last dyno peak and little to no gains throughout, again its due to the heat and humidity.

If the loss is 4% to 5% reasonably for the atmospheric changes, then we all should be right on the money for gains. 276whp with 4.5% added in would be about 288-289whp which makes sense for a full exhaust or Gen 3 install up from baseline of 276-277whp.

I'm not going to dyno again though until its a reasonable 80ish degrees, now that I got rid of that crap OEM muffler. It feels like the same gains I got with the X-Pipe added in again with straight through Magnaflows added and the rear muffler gone. Hoping for 285-290whp, it definately is fast now.

Why not wait for September and nice cool temps? I agree on your numbers, when I installed my Berk CBE I went from 278WHP to 294WHP under similar temps (low 60's) and low humidity. I then installed Gen3s and showed "no gain" at 95F and high humidity. Something tells me when I do another pull come September, I'll be over 300WHP.

Z1804 07-26-2010 02:10 PM

Quote:

Originally Posted by 370Zsteve (Post 645095)
Why not wait for September and nice cool temps? I agree on your numbers, when I installed my Berk CBE I went from 278WHP to 294WHP under similar temps (low 60's) and low humidity. I then installed Gen3s and showed "no gain" at 95F and high humidity. Something tells me when I do another pull come September, I'll be over 300WHP.

The Berk CBE sounds great. I'm not surprised you got that much gains from it. With the 8 month wait I had to go with the Boombop Shop CBE. I should receive delivery sometime late this week or next week, so I'm post a video. But you're rignt, probably will not get another dyno until September-October.

daisuke149 07-26-2010 04:12 PM

Quote:

Originally Posted by Z1804 (Post 645127)
The Berk CBE sounds great. I'm not surprised you got that much gains from it. With the 8 month wait I had to go with the Boombop Shop CBE. I should receive delivery sometime late this week or next week, so I'm post a video. But you're rignt, probably will not get another dyno until September-October.

No see you stupid!!!...

(see what i did there!)

Z1804 07-26-2010 04:36 PM

Quote:

Originally Posted by 370Zsteve (Post 645095)
Why not wait for September and nice cool temps? I agree on your numbers, when I installed my Berk CBE I went from 278WHP to 294WHP under similar temps (low 60's) and low humidity. I then installed Gen3s and showed "no gain" at 95F and high humidity. Something tells me when I do another pull come September, I'll be over 300WHP.

Quote:

Originally Posted by daisuke149 (Post 645258)
No see you stupid!!!...

(see what i did there!)

You lost me dude.....

daisuke149 07-26-2010 04:56 PM

Quote:

Originally Posted by Z1804 (Post 645306)
You lost me dude.....

haha i jsut copied what you said and put it in a diff thread. is all.

'10Anamoly 07-26-2010 06:16 PM

Anybody in ATL have a digital camcorder that they might be willing to let me get an exhaust clip on? Wanted to post it on the site database since nobody else has this setup.

daisuke149 07-26-2010 07:24 PM

where in atlanta you live. I have a video camera we can use sometime on the weekend. Could use your help with some stuff with it too. i aint going to zcon so i'l be around. sat morning best for me.

'10Anamoly 07-26-2010 07:49 PM

Dai, I'm off of I-285 on Shallowford Rd (near spaghetti junction). I'm not going to ZCON either so we can shoot whatever we need to. Will PM you my number so we can catch up on Sat sometime.

daisuke149 07-26-2010 10:04 PM

roger roger.

NewlyIMPORTed 07-26-2010 10:24 PM

yeah i def want to re dyno in the fall lol the heat and humidity kills numbers ill get my tune around christmas so we will see what happens then

daisuke149 07-26-2010 10:26 PM

I just want to redyno at the same temp i had my baseline. which may not happen till september or something.


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