my new custom CAI and MAF

christian370z

Wow, that is certainly a great result! I wonder why the ECU kept pulling timing, that stinks it was limiting your gains a bit.

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-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

didymus

Cool!

Jordo!

Bigger tube will slow the airflow and the ECU will interpret that as less air, so it could be reading less load and running less timing. You'll probably have to rescale things a bit.

Any driveability quirks at part throttle?

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Megan370z

This is why I tuned the MAF table ,
there is still some spikes in the table that I need to fine tune.



I had to remove the oversize TB because I did not had time to connect the hose coolant and bleed the system. It was only to look at the power gain in general.
one thing for sure is the Idle screw need to be adjusted ! I was running 1200-1300rpm Idle.

other than that everything is running fine.

Jordo!

Great!

You may be stuck with a higher idle -- probably not much lower than 1K after adjusting. No luck just tuning the ECU map for it?

Wonder why it was pulling timing? Light knock maybe -- how lean was it approaching fuel cut?

Anyway -- great job!

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Megan370z

after looking at the TB
there is enough adjustment on both screws on each TB to properly reduce the idle quite lot.
there shouldn't have any problem getting back the low rpm idle


as for the tuning with a lower idle ,,
no we didn't went too much in the tuning because the time was limited.
I did what I could but since I'm going back on the dyno in April ,
that will give me the time to fix those little details !


previously before the Dyno I reduced the timing about 1-2 degree
it was getting close to 12.9-13.0 at 6800rpm in uprev which is about 13.4 on my WB

Jordo!

Only reason I mention that is that idle speed is affected a lot by TB size, and there is some physically determined range that any given engine will idle smoothly at, which may nor may not be as low as stock with the new set up. Probalby more room to adjust due to VVEL, but no idea how the idle map affects that -- good luck!

Messing with the set screws may screw up TPS calibrations... just something to think about if you have to move things by more than very small increments.


Hmm, not particualy lean for a NA car, but maybe a few 10ths of a point leaner than the ECU likes to see at WOT? I seem to be making best power on a steady 13.2 - 13.4 across the board at WOT (according to tailpipe sniffer, so not that lean in reality) with several extra degrees of timing down low through mid range, and only 1-2 over stock up top.

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Megan370z

Im sure it will be fine because since its another set of Throttle body , we had to do a re-learn . once I close the gap in the TB with those screw , im sure its going to be alright.


on my car its was between 12.7-12.9 on my WB (12.3-12.4 in Uprev)

Jordo!

Hmm. Not sure then. I'm convinced that maximum advance is seriously reigned in by VVEL. It's gotta be reading load differently or referencing some other look-up table that can't be accessed then. Hmm. Good luck -- keep us posted

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Megan370z

I will update for sure once I get back on the dyno !!

henry0844

that 20whp bump at the top of the rev range looks promising let's hope u see those type of gains throughout the rpm range! good luck with your project.

draper

Megan,

your dyno number before your CAI was installed was 280 (with stock intake),
and you got 299 after install and tune.

Do you think you would've gained similar numbers if you had Gen 3 installed and tuned after dyno at 280?

And also given the fact that you had your own, similar to Motordyne, intake manifold was installed but you didn't have a chance to tune it, your 299 also accounts for the 'intake manifold with tune'

Megan370z

if you compare both CAI , I would say my CAI would perform better and give a slight increase of power .

Remember I went on the car with a not fully tuned ECU with the new mods.
since my CAI has a bigger MAF Tube , the MAF table need to be tuned .
its not an easy process during winter time with the street tuning that I'm doing (slippery sometime and always in the lookout for cops and other witness).

with a complete tune, I'm positive that gain will be half more than the Stillen Gen3


I wouldn't give much credit to the intake manifold , the reason being other peoples with the M370 that has test pipe and/or an efficient exhaust lost peak power but showed the normal gain in the mid-range .
and even those with HFC did not gain much anyway because the M370 shift the peak torque point at a lower RPM range ,
lower torque = lower HP

draper

cool, looking forward to the results. Every bit of HP counts for NA.

so the intake manifold is not worthwhile, results are mixed with this one and are not same across the board. And I don't think anyone got their ecu tuned after installing the Motordyne manifold. It might be because of some cars ecu not adapting to the new mods and would result in good gains after tune whereas some would adapt well to the mods and not gain much after tune, as this is a general reason often said by tuners.

somatic

so, not to be a necro but this looks very interesting. What ever happened???

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