Unichip Dyno...
Originally Posted by Darshu
Well if the runs weren't done on the same day it's really sort of tough to tell if you actually lost power. Can you datalog your timing with the Unichip? I'm curious what the timing map looks like.
Originally Posted by Changvi
But i did compare the two dyno graphs. The powerband dropped substantially because the basically stack them on top of another. It was very clear to me that power was lost. I only have 35k miles on the clock....
Originally Posted by Darshu
Oh, I'm not saying your second dyno pull wasn't lower than the first, I'm just saying that if the tests weren't done under controlled conditions you could've seen a 5-10% difference on a different day on the same dyno with the exact same mods and tune.
Originally Posted by Darshu
Oh, I'm not saying your second dyno pull wasn't lower than the first, I'm just saying that if the tests weren't done under controlled conditions you could've seen a 5-10% difference on a different day on the same dyno with the exact same mods and tune.
My stock dyno shows my torque dropping very very fast after 6,200 rpm. By the time I reach redline, my torque is a mere 185 lb-ft, down from ~210 lb-ft. What that tells me is that I lost 25 lb-ft in 400 rpm. That's a 11.9% loss (25/210). But from 5600-6000 rpm (keeping constant amount of rpm range), I start with 215 lb-ft and drop down to 210 lb-ft, only a 5 lb-ft loss (2.3%).
Here's where I posted my original dyno thread.
https://my350z.com/forum/intake-exhaust/247794-mrev2-style-plenum-on-287hp-non-rev-up.html
-Mathayus
Originally Posted by mavtais
Vince, I reiterate this statement. You could have an actual gain in power, especially top end. Take the graphs again, and this time offset them by 10 hp, with the after headers tune up and that could be the actual result. Too many variable factors to consider. All you can do is look at the curve. Especially the torque curve to see if it is any better at maintaining torque throughout the higher rpm range. The Z (and most Nissans) seems to have a huge problem with that on stock cams.
My stock dyno shows my torque dropping very very fast after 6,200 rpm. By the time I reach redline, my torque is a mere 185 lb-ft, down from ~210 lb-ft. What that tells me is that I lost 25 lb-ft in 400 rpm. That's a 11.9% loss (25/210). But from 5600-6000 rpm (keeping constant amount of rpm range), I start with 215 lb-ft and drop down to 210 lb-ft, only a 5 lb-ft loss (2.3%).
Here's where I posted my original dyno thread.
https://my350z.com/forum/showthread.php?t=247794
-Mathayus
My stock dyno shows my torque dropping very very fast after 6,200 rpm. By the time I reach redline, my torque is a mere 185 lb-ft, down from ~210 lb-ft. What that tells me is that I lost 25 lb-ft in 400 rpm. That's a 11.9% loss (25/210). But from 5600-6000 rpm (keeping constant amount of rpm range), I start with 215 lb-ft and drop down to 210 lb-ft, only a 5 lb-ft loss (2.3%).
Here's where I posted my original dyno thread.
https://my350z.com/forum/showthread.php?t=247794
-Mathayus
Damn,i'm so tempted....
Registered User
Joined: Nov 2006
Posts: 98
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From: san jose ca.
the uni chip isnt bad.. it just doesnt really do much for gains if your going N/A with only bolt ons.. i have da uni chip on my 06 rev-up with all n/a bolt ons and jwt s7 cams and ZCG did everything on my car... 06 6mt rev-up enthu. stock was 242 rwhp and with everything bolt on n/a and cams with uni chip.. 275rwhp... plus thirty is damn awesome for n/a.. thanks to mr bigg pimpn ROB and all the guys at ZCG... thanks Vince for my cam install...
It's because you offed that old exhaust and bought the HKS-Ti. I guess you didn't like it so much afterall! 
Maybe ZCG's dyno is off? Has anyone ever made big power there? I should dyno at the old SP dyno.
Maybe ZCG's dyno is off? Has anyone ever made big power there? I should dyno at the old SP dyno.
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