Very disappointing low dyno numbers please help!!!!!!!

MaDMaXX · 03-11-2012, 07:22 PM

It's ok having it dyno'd but that won't change it's state of tune...

And yes, you're going to get lower numbers and maybe cause problems with having such low octane fuel.

370Z JT · 03-11-2012, 07:53 PM

Definitely get some Mumtaz in the Z and tune ASAP.

When do you think the exhaust cams will be installed?

6MT · 03-11-2012, 07:59 PM

Why do people get so hung up about numbers. The real issue should be the change from one mod to the next. That tells a truer story.

SS_Firehawk · 03-11-2012, 08:12 PM

It's not that we are stuck on numbers, for what was installed, the numbers did not look right. I believe the mods were installed at the same time. It is difficult to discern the difference between stock and boltons without a dyno or looking at traps. Both still need to be done in near identical conditions to get accurate comparisons. I think the OP did the right thing asking the forum for help and weighing the options. Even in an untuned state, a 6 HP increase is less than drop ins. OBDI or OBDII, it doesn't matter in this case, the measured gains were so small, it was not the norm.

lpsscc · 03-11-2012, 10:33 PM

Quote:

Originally Posted by zuperman 370

Loool your more than welcome, u coming over for the F1 race?

Nope, I'm heading to the base for work but I might have to check the race out if I'm in town that day!

lp

zuperman 370 · 03-12-2012, 02:54 AM

Thanks guys for all of your help, i only put mumtaz in my car, which is the highest grade of fuel in Bahrain, but still not good enough, the cams will be installed ASAP, just waiting for the invoice to be sent to me so that i can go ahead with the payment for them, up next cams and tune and hopefully we will be seeing better numbers.

BRN370z · 03-13-2012, 01:58 PM

Adnan 286 rwhp 370z on dyno video 1

Adnan 286 rwhp 370z on dyno video 2

SS_Firehawk · 03-13-2012, 02:46 PM

Car sounds and looks great!

zuperman 370 · 03-13-2012, 02:59 PM

Quote:

Originally Posted by SS_Firehawk

Car sounds and looks great!

thank you very much, tune and cams up next

Jordo! · 03-13-2012, 05:15 PM

Those intakes probably introduce too much turbulence to the MAF sensors, causing misreads. Either toss them for stock + high flow filters or the stillen G3's and retune.

Also, keep in mind that even with SAE correction, if the ambient temps were radically different during each time you dynoed, that will throw things off quite a bit.

As to the octane issue -- run 95 RON and you will be fine.

zuperman 370 · 03-13-2012, 05:25 PM

Quote:

Originally Posted by Jordo!

Those intakes probably introduce too much turbulence to the MAF sensors, causing misreads. Either toss them for stock + high flow filters or the stillen G3's and retune.

Also, keep in mind that even with SAE correction, if the ambient temps were radically different during each time you dynoed, that will throw things off quite a bit.

As to the octane issue -- run 95 RON and you will be fine.

I'm afraid I spent way to much and love these intakes way more to just throw them aside loool isn't there another way to perhaps fix this MAF sensors issue if there is one that is, without having to change my current intake setup?

As for fuel I'm afraid that 91 is the highest grade that we have here

Jordo! · 03-14-2012, 10:16 PM

Quote:

Originally Posted by zuperman 370

I'm afraid I spent way to much and love these intakes way more to just throw them aside loool isn't there another way to perhaps fix this MAF sensors issue if there is one that is, without having to change my current intake setup?

As for fuel I'm afraid that 91 is the highest grade that we have here

It depends. If it's a constant misread then yes, with tuning. If it's a random intermittent misread then you'll have to experiment...

Does the location of the MAF sensors change from stock? That alone could be the cause, and if so, it should be a constant error that can be fixed with tuning.

Another possiblity is the filters -- if they use the HKS style "mushroom" foam filters, I'd swap them out for larger ones made of oiled cotton (e.g., K&N) or dry synthetic (e.g., AEM).

If the 91 is AKI (RON+MON/2) then you are fine. If it's 91 RON, that is basically 87 AKI (i.e., "regular" unleaded), which is too low an octane for the Z.

LukasC · 04-04-2012, 12:19 PM

Quote:

Originally Posted by ANMVQ

I really do not think his numbers are that off, His bolt on mods before tune should have got him 10-15 WHP and the tune would add about 15WHP more Which would put him right around 300WHP or so,. I made 298 WHP 240 WTQ fully bolted( Stock cats) tuned. Also AT 7 spd..

The guys with the 30HP over stock untuned is what crank HP, No to go off topic but there is no way you got 30 WHP untuned with I/E. Just IMO

My car untuned put down 308.27 with just cai and cbe and i got it tuned and now im making 313.56 so i t is very possible. U just need quality parts and quality hands to install them. Without that u wont see the results u want.

Vbp6US · 05-03-2012, 03:52 AM

Any update on this?

zuperman 370 · 05-03-2012, 07:01 AM

I think that i may have found the problem, the MAF readings were messed up, you see the MAF sensor usually is facing up, like the oem setup and any other aftermarket intake setup, but my maf sensors were facing the side, i was even feeling it in the response of the car when driving as it was extremy slow to respond. Problem fixed, installed brackets and intake has been adjusted, MAF sensors adjusted to now they are facing the right direction, havent dynoed the car yet but i am feeling the difference, also the PVC hoses were extermly bent, restricting the air flow, but now that also has been adjusted. Now question is do these factors make a difference in dyno numbers, so if i got 286 with the screwed up setup, could i possibly get 290 ish on the adjusted setup, i would be more than happy with 290 untuned, and 300ish tuned

03-11-2012, 07:53 PM	#47 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	Definitely get some Mumtaz in the Z and tune ASAP. When do you think the exhaust cams will be installed? __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

03-11-2012, 07:59 PM	#48 (permalink)
6MT A True Z Fanatic Join Date: May 2009 Location: ITU Zone 2 Posts: 22,459 Drives: Reliant Robin Rep Power: 1790	Why do people get so hung up about numbers. The real issue should be the change from one mod to the next. That tells a truer story. __________________ Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D

03-11-2012, 08:12 PM	#49 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	It's not that we are stuck on numbers, for what was installed, the numbers did not look right. I believe the mods were installed at the same time. It is difficult to discern the difference between stock and boltons without a dyno or looking at traps. Both still need to be done in near identical conditions to get accurate comparisons. I think the OP did the right thing asking the forum for help and weighing the options. Even in an untuned state, a 6 HP increase is less than drop ins. OBDI or OBDII, it doesn't matter in this case, the measured gains were so small, it was not the norm. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction Last edited by SS_Firehawk; 03-11-2012 at 08:16 PM.

03-13-2012, 02:46 PM	#53 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Car sounds and looks great! __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

03-13-2012, 05:15 PM	#55 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Those intakes probably introduce too much turbulence to the MAF sensors, causing misreads. Either toss them for stock + high flow filters or the stillen G3's and retune. Also, keep in mind that even with SAE correction, if the ambient temps were radically different during each time you dynoed, that will throw things off quite a bit. As to the octane issue -- run 95 RON and you will be fine. __________________ Enjoy it. Destroy it.

03-11-2012, 07:22 PM	#46 (permalink)
MaDMaXX Enthusiast Member Join Date: Jan 2012 Location: Oregon from England Posts: 292 Drives: 350z Rep Power: 13	It's ok having it dyno'd but that won't change it's state of tune... And yes, you're going to get lower numbers and maybe cause problems with having such low octane fuel.

03-12-2012, 02:54 AM	#51 (permalink)
zuperman 370 Track Member Join Date: Dec 2009 Location: BAHRAIN Posts: 944 Drives: 370z 2010 at blue Rep Power: 16	Thanks guys for all of your help, i only put mumtaz in my car, which is the highest grade of fuel in Bahrain, but still not good enough, the cams will be installed ASAP, just waiting for the invoice to be sent to me so that i can go ahead with the payment for them, up next cams and tune and hopefully we will be seeing better numbers.

03-13-2012, 01:58 PM	#52 (permalink)
BRN370z Base Member Join Date: Aug 2010 Location: Bahrain Posts: 21 Drives: '11 370z Quartz A/T Rep Power: 15	Adnan 286 rwhp 370z on dyno video 1 Adnan 286 rwhp 370z on dyno video 2

05-03-2012, 03:52 AM	#59 (permalink)
Vbp6US Enthusiast Member Join Date: Nov 2011 Location: SoCal Posts: 442 Drives: 2009 370z MB 6MT Rep Power: 14	Any update on this?

05-03-2012, 07:01 AM	#60 (permalink)
zuperman 370 Track Member Join Date: Dec 2009 Location: BAHRAIN Posts: 944 Drives: 370z 2010 at blue Rep Power: 16	I think that i may have found the problem, the MAF readings were messed up, you see the MAF sensor usually is facing up, like the oem setup and any other aftermarket intake setup, but my maf sensors were facing the side, i was even feeling it in the response of the car when driving as it was extremy slow to respond. Problem fixed, installed brackets and intake has been adjusted, MAF sensors adjusted to now they are facing the right direction, havent dynoed the car yet but i am feeling the difference, also the PVC hoses were extermly bent, restricting the air flow, but now that also has been adjusted. Now question is do these factors make a difference in dyno numbers, so if i got 286 with the screwed up setup, could i possibly get 290 ish on the adjusted setup, i would be more than happy with 290 untuned, and 300ish tuned

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