Nissan 370Z Forum - Exhaust Poll

Nissan 370Z Forum (http://www.the370z.com/)

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- - Exhaust Poll (http://www.the370z.com/intake-exhaust/34478-exhaust-poll.html)

Quote:

Originally Posted by chii370 (Post 2531732)

jeez, thats not half bad. I would have never called THAT much. I have absolutely NO IDEA if I gained anything with my ark dts or not. never had the 13 dyno'd and havent tuned it since install. to be honest, i HOPE it does but i really dont give a ****. when its TT it wont matter anyway.

i would say 10-15whp at most if thats your only mod

either way, ark does make a really sick sounding exhaust for a good price

when you do go twin turbo, you could get 3in test pipes and have a electric cutout welded on to the test pipe this way you can keep your exhaust do when driving around town, you have a streetable car but when you are at the track, you can open them up for a optimum spool and power(heck i have seen evos gain 40whp with an electric cutout open)

thats the route im gonna take when i twin turbo my Z, get a nice tame exhaust for daily driving while having a button to make my car scream at will

I'm really not trying to be a ****, but gaining 13whp from ditching the stock headers and cats for Longtubes is really not that impressive. Plenty of folks get that from test pipes. (Not to mention the 20 degree difference, which absolutely matters. WC or not, you will make more power when it's cooler.)

Also, there's nothing about that data that indicates your resonators had anything to do with the gains at all. I would venture a guess that the cats (and temperature) is the main thing that netted you that gain, given that the gains are uniform throughout the power band.

Anyway, glad you like it, that's all that really matters anyway.

Also, that's not really rich... most guys find maximum N/A power between 12.5 and 12.8. Before my tune, I was pegged at 10.5, now THAT was rich.

Quote:

Originally Posted by Sh0velMan (Post 2532184)

13 was peak. Mid range is much more impressive and important for the almost 20 it gained! And since its untuned the full gains can't be seen since its so rich. The stock map can't do everything.

You're 100% wrong about the temp. The SAE correction targets 75 degrees for both. So if both would have been run at 75* that's the power you'd see. If you want uncorrected, fine, I'll get it showing you what 20* really does.

Since another 370 dyno'd at 91* with TS I'm going to again say you're wrong. He only put down 280 which was the same as me with cats. Guess what?? He's raspy as hell.

The sniffer in the tall pipe is 1.0 AFR off. The cars wide bands were much richer from the logs.