my new custom CAI and MAF
 

As planned the new CAI and oversize MAF tube all in one
cant wait to get on the dyno once I tune the ECU properly with and without the oversized Throttle body.
should be done by the end of January !!!

http://www.the370z.com/members/megan...8-img-1394.jpg
http://www.the370z.com/members/megan...2-img-1398.jpg
http://www.the370z.com/members/megan...4-img-1685.jpg

you can also see the Swap of my DIY 350HR intake manifold that I installed few weeks ago

In for dyno result +1

That is some beautiful fabrication and welding on those intakes, I can't wait for dynos either!

Looking good :yum:

Nice Work dude, appreciate that effort

wow

Very nice welding on those pieces. This will be interesting to see what happens performance wise.

Dam man, Do you rally race with that car, its filthy LOL J/K... Looks good hope to see some good gains.

Wow. That looks good. Nice fit and craftsmanship

wow +1 on the craftsmanship looks great!

I know these are going to sound silly...

But whats the difference between this setup and say the Stillen Gen III's?

Why the narrow portion there halfway up the main pipes?

And why using both metal/cobb tubes instead of solid tubes all the way to the TB?

just to give some dimension on those pipes

its start from 3inch (filter) and goes to a reducer down to 2.5inch (63.5mm) for the MAF tube then it taper larger to 2.75'' (silicone hose )
I had a pair of throttle body machined to 62.5mm from 60mm stock.

as I said on the first post , I'm going to be testing this by the end of January !


I'm working on the tune with the swapped 350hr intake manifold right now
then the CAI will be next , once everything is tuned (Uprev tuner) I'm getting on the Dyno !!!

The Stillen gen 3 was my inspiration to begging with , since its a proved CAI for the performance given.
because my new throttle body is bigger I needed everthing else also bigger to aloud the same air flow.
using silicone tube was for the flex that is needed !

yup I'm going on the track with it , as I did with the previous Z (roadster).

I'm looking for the most gain ! hehe

Thanks for the info! Look forward to seeing your positive results. :tup:

looks good.

very interested to see results!

Can you post a close up of the MAF sensor mount? How do you have that welded to the pipe? Looks really great though!

I think if I can get the MAF bracket, I'll be making a set of intakes for my car as well!

Just got a new TIG welder = Win!!

Nice work, in for results.

http://www.the370z.com/members/megan...7-img-1690.jpg

http://www.the370z.com/members/megan...6-img-1687.jpg

unfortunately , I'm not the one that made those intake but I could easily did the same thing if I had the cutter and welder equipment since I was a TIG welder in the pass before I join the army.

the MAF bracket was done by lazer cut which was expensive to be done !

Wow... those look great! I'm definitely interested to see some numbers. If you don't mind sharing... How much did everything cost you?

it was about 1000$Can tax-in thats include removing the bumper and everything needed to work properly, you could maybe remove 100$ there.
but since its a custom CAI to my spec its a bit expensive.

the Stillen gen3 are about what ,.. 500-550$Us +tax brand new ?

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there is something I forgot to say was the silicone hose is 2.75 inch ID ,, in my previous post I said it was 2.5'' from the MAF / Throttle body which is wrong. because It taper larger after the inlet fiting past the MAF sensor to 2.75'' OD

Dang... I need to find out how to get those MAF brackets.

Hmm, I wonder if I could use the OEM plastic parts and just use couplers to hold it together.

WOW! That is expensive, but since you got all the R&D maybe you can have them mass produced and become a vendor ;)

Great work bro :tup:

I had an idea about this but I'm waiting to see the result on the Dyno first !

The custom CAI i have isn't for everyone because it needs to be tuned with Uprev/Cobb.

yea, that would be the downside. Unless you hooked up with Up-Rev? I guess it really depends on the results though ;)

Good luck :tup:

In all honesty, anyone with a Stillen G3 intake should be tuned anyway since that intake tends to lean out the AF mix at the top end. It is common to see detonation up top as a consequence, but the gains are worth it and I would happily pay for a new tune if these intakes deliver!

Looking good!


+1 for the DIY


DAN

who cares man,

all of us are tunning our cars nowdays.

sure ofcourse
but having a bigger MAF tube is a different story .

Update !!!

I just got back from the Dyno
Let me tell you guys getting over 300rwhp on that dyno ( low reader) did not happen !!
I discovered just before I had some bad winter gas
it explain pretty much what we have seen previously and today !
nothing can be done about the very top end of the power band , no matter what the ECU pull a lot of timing even in the mid-range

result = 299.5 rwhp !!


previously on the car
280 rwhp
My DIY 350zHR intake manifold (M370 from Motordyne)
Stillen Headers
Test Pipe
X-pipe (60mm)
2x big resonator
Custom straight flow muffler
Light weight Crank pulley

----------------------------------------------
I still have some tuning to be done on the MAF table in Uprev
then some to get the proper fueling everywhere in the powerband
the next Dyno session will be sometime in April / May

with a little bit of tuning and getting the WOT pull relatively OK
we managed to test both new mods on the car
which is the Custom CAI w/ Oversize MAF tube
and then with the Oversize Throttle body

The new CAI provided 11-14 rwhp
the oversize Throttle body with the CAI 7-9rwhp
we barely did any tuning with the last mods (TB)
so the graph isnt so appealing but Im not worry about this because it was running leaner with the oversize TB on

http://www.the370z.com/members/megan...ow-muffler.jpg

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

Cool!

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?

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.

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!

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

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.

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)

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 :tup:

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