350Z dyno numbers

[AU RSX-S]

http://www.s2ki.com/imagecatalog/imageview/30626/6/

[Adam]

And how much is this thing supposed to weigh in at?

I woulda liked it to at least push over 250...

Maybe I should move this to the Kills section :D

[ActiveAero]

Well it looks like Nissan rating it at 287hp/274lb-ft flywheel is pretty much correct. Guys are already running 13's trapping over 100mph so they have adequate power if you ask me.

[grizoove]

I saw a few driving to atlanta and out near houston this weekend. I like them very much. I think they look pretty sharp.

Brock, have you seen one autocrossed yet??

[WiggiE]

Does anyone know what that dip at 3600 rpm is??

[grizoove]

it only happened on one of the runs...so maybe his foot slipped off the accelerator or something...

[WiggiE]

it only happened on one of the runs...so maybe his foot slipped off the accelerator or something...
If you look at the key for the dyno runs: the red was the baseline run, and the blue was with the airfilter and holder removed.

[linuxman51]

wonder if there's some sorta air valve or something in the filter box that doesn't open until higher rpms (or just higher air flow..)?

[Adam]

wonder if there's some sorta air valve or something in the filter box that doesn't open until higher rpms (or just higher air flow..)?

Quite possibly..

There was a post on here a while ago linking to a write-up about Variable Intake Length. A butterfly valve in the intake path that alters the length of the intake at different RPM's but, I'm sure if the 350 had something to that extent they wouldn't take it off but, more than likely the MAP or MAF (read ECU) was probably startled by the increased air w/out the box and filter.

[ActiveAero]

wonder if there's some sorta air valve or something in the filter box that doesn't open until higher rpms (or just higher air flow..)?

Quite possibly..

There was a post on here a while ago linking to a write-up about Variable Intake Length. A butterfly valve in the intake path that alters the length of the intake at different RPM's but, I'm sure if the 350 had something to that extent they wouldn't take it off but, more than likely the MAP or MAF (read ECU) was probably startled by the increased air w/out the box and filter.

GSR Integra's have 2 stage intake manifolds with different length runners operated by a butterfly valve. Just take a look at Wiggie's car one day. If the Z has this of course they wouldn't take it off because it in the freaking intake mainfold. You must be thinking of something else because that has nothing to do with removing the airbox.

The graph looks fine to me. All it shows is that it doesn't gain anything by removing the airbox. Most likely has a cold air design to begin with and removing the air box does nothing more than improve throttle response.

Doesn't the nissan have a form of variable valve timing as well?

[WiggiE]

The graph looks fine to me. All it shows is that it doesn't gain anything by removing the airbox. Most likely has a cold air design to begin with and removing the air box does nothing more than improve throttle response.
No, look at the graph again. If you look at the differences below the 3600 dip, there is none. But above 3600, the blue line looks like it should have been that way from the factory. The red line drops at 3600 and continually stays almost an exact amount below the blue line.

Weird, to say the least.

[WiggiE]

One other thing to look at. The A/F mixture all of a sudden richens up at 4500rpm. My guess to that would be variable lift. Does anyone know for sure if the 350Z motor has variable lift??

[grizoove]

I am pretty sure that nissan does have a variable lift design but I cant think of the name of it right now...I will look it up later on.

[A418t81]

No variable lift on the 350's motor but I'm pretty sure it has some sort of variable cam timing, all the new motors do these days.

[Jess]

A 31-year-old suspect led police on a 120-mile pursuit through central Utah that reached speeds of 130 mph Monday evening. The Sevier County Sheriff's Office stopped a 2003 Nissan 350Z about 5 p.m. on Interstate 70 near Salina for not having license plates. The driver pulled over, but once the sheriff's deputy approached the car, he sped away heading east. After a 50-mile chase, the sheriff's deputies lost the vehicle, which was recently stolen out of California. They checked rest stops while members of the Utah Highway Patrol set up road spikes near Green River, said trooper Jason Haywood. Sevier County deputies gave up and the Highway Patrol removed the spikes moments before the man sped through the area at 6:40 p.m. The Highway Patrol resumed the pursuit and reached speeds of 130 mph, with the Nissan still pulling away, Haywood said. Troopers lost the car near the Hanksville Junction, but Haywood spotted the Nissan again on Highway 24, headed south. Wayne County sheriff's deputies spiked the vehicle's tires and the car stopped three miles later. The driver ran 100 yards from the car and hid in the sand. Troopers arrested him without incident 10 minutes later, two hours after the chase began. The man, who was alone, said he was from California but carried a Colorado ID. He was booked into Sevier County Jail.

[AU RSX-S]

Yeah, I just read that. Crazy.

[ActiveAero]

The graph looks fine to me. All it shows is that it doesn't gain anything by removing the airbox. Most likely has a cold air design to begin with and removing the air box does nothing more than improve throttle response.
No, look at the graph again. If you look at the differences below the 3600 dip, there is none. But above 3600, the blue line looks like it should have been that way from the factory. The red line drops at 3600 and continually stays almost an exact amount below the blue line.

Weird, to say the least.

Yeah I did. They take the air box off and it gains a fraction of hp. You can't just look at one dyno plot. I see the dip but there could be many reasons. Probably just something to do with its variable cam timing system.