370Z on Lightspeeds Dyno

Jordo! · 06-10-2010, 10:45 PM

Quote:

Originally Posted by Snakes709

his shouldnt be that jumpy, should be smooth like mine or at least smooth increasing curve.

Oh, I thought you were referring to yours as not being a curve... duh

It could just be an artifact of scaling/smoothing -- dynapack readings often look a little "lumpy".

Although I could swear I've seen another persons' dyno looking just like that on a dynojet... I need to see what the VVEL maps look like... tuning cam angle and lift is probably a b!tch to set right on these motors with a good bit of trial and error.

Quote:

Originally Posted by djpathfinder

Platy-wha???

The before and after torque curves are similar, even though there are many "oscillations"...wonder why there were so many of them.

Flat -- if the torque curve were leptokurtic then something would be very wrong

Yeah, like I said, could just be artifactual, but it would be nice to see the VVEL and ignition maps...

Snakes709 · 06-10-2010, 11:37 PM

I dont think its the scaling/smoothing. Its SAE corrected and also if you look closely you can see the HP graph matches the TQ graph...whenever the TQ drops, the HP power doesnt drop but increases abit slower.

So in other words chinook, you probably could get abit better results with abit more work on the tune. I'm not saying Cam or whoever did it, did a bad job, but from what i understand you are his first 370z to work on. Once again, hopefully he can do a good job with my car.

Chinook · 06-11-2010, 08:17 PM

Yeah Snakes it was Cam, The more I drive the more I appreciate the job he did, so if he can get your torque curve a little better, you should be very happy! Did you get a dyno done before any of your mods?

djpathfinder · 06-11-2010, 08:22 PM

Their website isn't working and no one to answer the phones. Couldn't enquire and book today.

Jordo! · 06-11-2010, 08:24 PM

Just spoke with a good friend of mine who tunes 350's and 370's. He seemed to feel the OEM VVEL maps were already pretty optimized without changing the manifold... hmm. Dunno.

It might be goos to make sure the ECU isn't pulling some timing due to light knock -- I believe the ECU is pretty aggressive with that on this car. Could be something like that if the AFR's aren't warbling in step with the torque "lumps".

How's it feel under load? Smooth or do you detect any hesitation?

Chinook · 06-11-2010, 09:07 PM

Feels really smooth and I saw the tuner using headphones connected to a box reading knock sensor that was wired to the engine bay, so I'm guessing he was checking. I shoulda asked more questions I guess.

Jordo! · 06-11-2010, 10:22 PM

Quote:

Originally Posted by Chinook

Feels really smooth and I saw the tuner using headphones connected to a box reading knock sensor that was wired to the engine bay, so I'm guessing he was checking. I shoulda asked more questions I guess.

You're probably fine (curiously, the owners manual suggests that some light knock under load going up hills is to be expected

-- guess they have a good scalar map for knock or the pistons have meaty enough ringlands to not be an issue).

If it feels smooth under load and AFR's are stable (did they lean you out? I understand the OEM tune is quite rich!), I wouldn't worry too much about it.

Snakes709 · 06-11-2010, 10:40 PM

Quote:

Originally Posted by Chinook

Yeah Snakes it was Cam, The more I drive the more I appreciate the job he did, so if he can get your torque curve a little better, you should be very happy! Did you get a dyno done before any of your mods?

Only dyno i have is with the G3's installed and my butt dyno felt a good increase when i installed them, so if im at 280hp now, i was probably around 265-270.

So i want to get my tune done so bad and get a AP but i really need a Oil Cooler and its going to be time to upgrade my brakes soon since im doing alot of tracking now. And now im leaning towards road racing instead of drag racing im actualy thinking of selling the nitrous kit.

06-10-2010, 11:37 PM	#17 (permalink)
Snakes709 A True Z Fanatic Join Date: Aug 2009 Location: Edmonton Posts: 1,205 Drives: 2011 Evo-X GSR Rep Power: 18	I dont think its the scaling/smoothing. Its SAE corrected and also if you look closely you can see the HP graph matches the TQ graph...whenever the TQ drops, the HP power doesnt drop but increases abit slower. So in other words chinook, you probably could get abit better results with abit more work on the tune. I'm not saying Cam or whoever did it, did a bad job, but from what i understand you are his first 370z to work on. Once again, hopefully he can do a good job with my car. __________________ 2011 Evo-GSR AMS 2.4 stroker/ bore, FP Black build in progress. Sponsor: DSG Performance Last edited by Snakes709; 06-10-2010 at 11:41 PM.

06-11-2010, 08:17 PM	#18 (permalink)
Chinook Premium Member Join Date: Apr 2010 Location: Edmonton Age: 47 Posts: 84 Drives: 09 Nissan 370Z CS M6 Rep Power: 15	Yeah Snakes it was Cam, The more I drive the more I appreciate the job he did, so if he can get your torque curve a little better, you should be very happy! Did you get a dyno done before any of your mods? __________________ 09 Touring/Nav 6MT Carbon Silver STS Turbo

06-11-2010, 08:22 PM	#19 (permalink)
djpathfinder A True Z Fanatic Join Date: Mar 2010 Location: Edmonton, Canada Posts: 12,910 Drives: 2012 GT-R BE Rep Power: 733	Their website isn't working and no one to answer the phones. Couldn't enquire and book today. __________________ 2012 GT-R Black Edition Jet Black 2010 370Z 40th Anniversary // SOLD

06-11-2010, 08:24 PM	#20 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Just spoke with a good friend of mine who tunes 350's and 370's. He seemed to feel the OEM VVEL maps were already pretty optimized without changing the manifold... hmm. Dunno. It might be goos to make sure the ECU isn't pulling some timing due to light knock -- I believe the ECU is pretty aggressive with that on this car. Could be something like that if the AFR's aren't warbling in step with the torque "lumps". How's it feel under load? Smooth or do you detect any hesitation? __________________ Enjoy it. Destroy it. Last edited by Jordo!; 06-11-2010 at 08:26 PM.

06-11-2010, 09:07 PM	#21 (permalink)
Chinook Premium Member Join Date: Apr 2010 Location: Edmonton Age: 47 Posts: 84 Drives: 09 Nissan 370Z CS M6 Rep Power: 15	Feels really smooth and I saw the tuner using headphones connected to a box reading knock sensor that was wired to the engine bay, so I'm guessing he was checking. I shoulda asked more questions I guess. __________________ 09 Touring/Nav 6MT Carbon Silver STS Turbo

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