motordyne M370 manifold - round 2

efuseakay · 10-18-2010, 02:01 AM

Quote:

Originally Posted by TARDCORE

why do people keep speaking of tuning as if it is so easy for us to do? The VHR is a falesafe for Nissan. VVEL doesn't allow us to do any real tuning. VVEL is also very annoying as most Z owners have realized the slight delay in throttle response. Not this A/F raito bs that we can do and even then, I don't think A/F ratio adjustments on a car with full bolt ons will really make a difference. Tony at FI kinda proved that when they had cleaned up the A/F ratios when the LTH's were being tested. Everytime I return to this site I always see people talking about how after a tune the gains will increase. This isn't an LS7, it's a VQ. I am supprised to see a lot of F/I set ups running for so long without any majoy issues or at least, we haven't heard of any.

Oldschool reasoning. Nissan really stuck one to tuners with VVEL.

Trips · 10-18-2010, 02:13 AM

Quote:

Originally Posted by efuseakay

Oldschool reasoning. Nissan really stuck one to tuners with VVEL.

98intrigue · 10-31-2010, 02:22 PM

Your graph between 5000-6200 rpms is exactly how the end of my graph looks from 6500-7500 rpms. My hp climbs steadily to 6500 rpms, drops dramatically, and then finally hits peak at around 7200 rpms. It looks like a U at the end of the graph.

I just asked for my graphs from my tuner, so hopefully we can compare graphs.

98intrigue · 10-31-2010, 11:19 PM

theDreamer · 10-31-2010, 11:26 PM

Quote:

Originally Posted by TARDCORE

why do people keep speaking of tuning as if it is so easy for us to do? The VHR is a falesafe for Nissan. VVEL doesn't allow us to do any real tuning. VVEL is also very annoying as most Z owners have realized the slight delay in throttle response. Not this A/F raito bs that we can do and even then, I don't think A/F ratio adjustments on a car with full bolt ons will really make a difference. Tony at FI kinda proved that when they had cleaned up the A/F ratios when the LTH's were being tested. Everytime I return to this site I always see people talking about how after a tune the gains will increase. This isn't an LS7, it's a VQ. I am supprised to see a lot of F/I set ups running for so long without any majoy issues or at least, we haven't heard of any.

Why, what is so extreme about our tuning?
The only item we are unable to adjust right now is VVEL, which really has been a zero issue with basic forced induction. Now, if you want to lower the compression ratio, build the motor, or something else extreme then VVEL will be a factor but really it is a non-issue.

christian370z · 11-01-2010, 12:26 AM

Plus, everytime I see someone say that VVEL is not going to be cracked, I remember how many thought that the R35 GTR might be untunable with all the coding Nissan built into the ECU but obviously that was blown out of the water once the aftermarket started picking up with those cars.

theDreamer · 11-01-2010, 10:16 AM

Quote:

Originally Posted by christian370z

Plus, everytime I see someone say that VVEL is not going to be cracked, I remember how many thought that the R35 GTR might be untunable with all the coding Nissan built into the ECU but obviously that was blown out of the water once the aftermarket started picking up with those cars.

Exactly, now the pace might not be equal to the GT-R or other cars, but there seem to be companies willing to stick with the VQ37 and hopefully more will come.

Endgame · 11-01-2010, 01:36 PM

If the DOD could be hacked, someone will find a way to crack the VVEL.

Jordo! · 11-01-2010, 02:55 PM

Quote:

Originally Posted by 98intrigue

That dip at the end can be tuned out -- it has to do with OEM tuning approaching fuel cut.

98intrigue · 11-01-2010, 03:08 PM

Quote:

Originally Posted by Jordo!

That dip at the end can be tuned out -- it has to do with OEM tuning approaching fuel cut.

Any suggestions on how to do that? Brian at EFI was tuning my car for over 2 hours and couldn't figure out how to alleviate the problem.

esfourteen · 11-01-2010, 05:48 PM

Quote:

Originally Posted by 98intrigue

Any suggestions on how to do that? Brian at EFI was tuning my car for over 2 hours and couldn't figure out how to alleviate the problem.

Jordo has tons of great tips on tuning such as: "That can be fixed with tuning" and "you can tune that out"

Endgame · 11-01-2010, 05:55 PM

Quote:

Originally Posted by esfourteen

Jordo has tons of great tips on tuning such as: "That can be fixed with tuning" and "you can tune that out"

not taking anyone's side, but that was a funny post!

Staples · 11-02-2010, 11:27 PM

Quote:

Originally Posted by 98intrigue

Any suggestions on how to do that? Brian at EFI was tuning my car for over 2 hours and couldn't figure out how to alleviate the problem.

When I had my car tuned, we were seeing some dips like that, so we added fuel to drop it down to 12.5 - 12.6 at wide open, added 2 degrees of timing and I ended up making 8whp more. I've seen a lot of the 370z and G37 tuned with UpRev and for some reason, they like extra fuel. 12.5 - 12.8 A/F seems to be making the most amount of horsepower / torque.

eddieconfetti · 11-03-2010, 02:58 AM

Blame the government for the stupid car rules we have!!!!!!!

98intrigue · 11-03-2010, 08:44 AM

Quote:

Originally Posted by Staples

When I had my car tuned, we were seeing some dips like that, so we added fuel to drop it down to 12.5 - 12.6 at wide open, added 2 degrees of timing and I ended up making 8whp more. I've seen a lot of the 370z and G37 tuned with UpRev and for some reason, they like extra fuel. 12.5 - 12.8 A/F seems to be making the most amount of horsepower / torque.

Yes, my tuner said that he's seen 12.8 to be the sweet spot. I remember looking at the UpRev window and seeing the fuel right st 12.8, so I'm not sure why the graph shows 13.2.

10-31-2010, 02:22 PM	#18 (permalink)
98intrigue A True Z Fanatic Join Date: Jul 2010 Location: Clearwater, FL Age: 39 Posts: 4,855 Drives: 2014 Viper Rep Power: 430	Your graph between 5000-6200 rpms is exactly how the end of my graph looks from 6500-7500 rpms. My hp climbs steadily to 6500 rpms, drops dramatically, and then finally hits peak at around 7200 rpms. It looks like a U at the end of the graph. I just asked for my graphs from my tuner, so hopefully we can compare graphs. __________________ Ryan - 2014 Stryker Green Viper Gone - a few Vipers and a couple turbo VQs

10-31-2010, 11:19 PM	#19 (permalink)
98intrigue A True Z Fanatic Join Date: Jul 2010 Location: Clearwater, FL Age: 39 Posts: 4,855 Drives: 2014 Viper Rep Power: 430	__________________ Ryan - 2014 Stryker Green Viper Gone - a few Vipers and a couple turbo VQs

11-01-2010, 12:26 AM	#21 (permalink)
christian370z A True Z Fanatic Join Date: Jul 2010 Location: Newport Beach Posts: 3,900 Drives: 2010 370Z/Saab 900se Rep Power: 432	Plus, everytime I see someone say that VVEL is not going to be cracked, I remember how many thought that the R35 GTR might be untunable with all the coding Nissan built into the ECU but obviously that was blown out of the water once the aftermarket started picking up with those cars. __________________ -320whp / 259wftlbs- SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

11-01-2010, 01:36 PM	#23 (permalink)
Endgame A True Z Fanatic Join Date: Nov 2008 Location: Phoenix Posts: 1,613 Drives: Nothing Now! Rep Power: 224	If the DOD could be hacked, someone will find a way to crack the VVEL. faya likes this.

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11-03-2010, 02:58 AM	#29 (permalink)
eddieconfetti A True Z Fanatic Join Date: Jun 2009 Location: Duluth, GA Posts: 3,334 Drives: A Totaled PW Z Rep Power: 23	Blame the government for the stupid car rules we have!!!!!!!