DIY: Fang Vents: Forced fresh air to your airbox

Modshack · 07-01-2009, 11:53 AM

Quote:

Originally Posted by GreenJalapeno

i think the reason for the detonation of colder air is better since its denser, not to cool the engine (although its a good side affect). .

I think you meant to say
"Hotter" there, but yes, I agree. It's about the ability to use denser air that will combust in the proper A/F range. Leaner = hotter. When a MAF IAT sensor detects overly hot air, the timing maps are rolled back along with performance. Cooler is always better..

racerxj17 · 07-01-2009, 12:23 PM

just to clarify, cooler air (denser) will make the A/F go leaner, and hotter air will make the car run richer.

Modshack · 07-01-2009, 12:27 PM

Quote:

Originally Posted by racerxj17

just to clarify, cooler air (denser) will make the A/F go leaner, and hotter air will make the car run richer.

Yeah, sorry..That is correct, but the 02 sensors downstream are always correcting for that. It's the timing that imposes the performance hit..

ZYUL8R · 07-02-2009, 01:10 AM

Quote:

Originally Posted by racerxj17

just to clarify, cooler air (denser) will make the A/F go leaner, and hotter air will make the car run richer.

Yes, the ECU gets a hot Intake temperature it cuts fuel to keep the A/F ration in place, which robs performance.

With cooler Intake temperatures it doesn't do that.

Ever notice your car running good on a cold day...its the ECU giving more fuel to burn with the denser air.

Modshack · 07-02-2009, 12:08 PM

Quote:

Originally Posted by ZYUL8R

Yes, the ECU gets a hot Intake temperature it cuts fuel to keep the A/F ration in place, which robs performance.

With cooler Intake temperatures it doesn't do that.

Ever notice your car running good on a cold day...its the ECU giving more fuel to burn with the denser air.

Well....Close but......

Fuel is always being adjusted no matter what the temperature. This is handled downstream by the 02 sensors which are constantly making minor corrections to A/F based on Measured data from both sampling, and the MAF flow information. They don't care what the Intake temps are, they are just concerned with keeping things in line. There are Short term trims (imediate minor changes happening all the time), and long term trims, (that build up a reference map based on the overall conditions). Heat and IAT temps largely affect timing maps in most modern ECU's...They dial back timing as a protective measure.. The performance loss you experience is largely this adjustment. Fuel continues to be held at or around stochiometric (14.7:1 A/F) as long as you're in Closed loop mode (not WOT Open loop which uses pre-built Fuel maps and ignores 02 input). Here's an IAT and timing adjustment chart from an '08 Corvette. Notice how, at temps, over a mere 86 degrees, a timing retard starts being implemented...As a reference, it is not unusual to see the IAT's on the Z exceed 150 degrees when sitting in traffic. On the Vette chart, that's an average -6 to -8 degree timing pullback

ZPirate · 07-08-2009, 10:09 PM

Looks good Steve. Perhaps I can check out your latest creation this weekend.

Modshack · 07-09-2009, 01:20 PM

Quote:

Originally Posted by ZPirate

Looks good Steve. Perhaps I can check out your latest creation this weekend.

Yup! Lets get together!

edeeZee · 07-09-2009, 08:51 PM

Nice work...maybe you can become a manufacturer of high-performance parts a la Stillen, HKS, etc.

jpit · 07-10-2009, 02:58 PM

Modshack,

I installed your cai ventilation system last night and all went smoothly. I do have a one question. Does a 2.5" tube allow enough air to enter the filter area - I noticed after my installation that you trimmed the aluminum flanges. Was that to allow more air in off the sides or just to make it fit? Also, were you able to route the tubes so they can't be seen from the front - haven't been able to do that yet. Thanks.

NIZMOZ · 07-10-2009, 03:23 PM

Where did you get the hose and the circular parts?

Modshack · 07-10-2009, 04:32 PM

Quote:

Originally Posted by NIZMOZ

Where did you get the hose and the circular parts?

Follow thr link in my Sig to the photo album. It's all there..

Modshack · 07-10-2009, 04:35 PM

Quote:

Originally Posted by jpit

Modshack,

I installed your cai ventilation system last night and all went smoothly. I do have a one question. Does a 2.5" tube allow enough air to enter the filter area - I noticed after my installation that you trimmed the aluminum flanges. Was that to allow more air in off the sides or just to make it fit? Also, were you able to route the tubes so they can't be seen from the front - haven't been able to do that yet. Thanks.

Cool!

The front flanges were trimmed to fit better (bring the bottom of the flange up flush with the Fang opening) , the back flanges were ones I had leftover from another project and were already cut. You should be able to get plenty of air through there regardless..

On the tubes, I got the drivers side out of sight. The Passenger side still shows a little, but I went in from the top with a long Zip tie and snugged it toward the top a bit. You really need to look for it now to see it..

NIZMOZ · 07-10-2009, 04:47 PM

Quote:

Originally Posted by Modshack

Follow thr link in my Sig to the photo album. It's all there..

It doesn't say where you got the hose from just the alum piece.

Modshack · 07-12-2009, 02:46 PM

Quote:

Originally Posted by NIZMOZ

It doesn't say where you got the hose from just the alum piece.

Ummm...Everything was listed at the top of the album page:

(4) 2.5" aluminum flanges P/N 10350-10
(6) foot Aeroduct hose P/N 05-29810
(4) Stainless clamps

From: Http://www.aircraftspruce.com

RCZ · 07-12-2009, 11:03 PM

Thanks for the info. I'll be doing this this week.

Any pictures from further away, just to see if it looks completely silly or not :P

07-01-2009, 12:23 PM	#17 (permalink)
racerxj17 Track Member Join Date: Apr 2009 Location: Socal Posts: 555 Drives: 09 370z Rep Power: 17	just to clarify, cooler air (denser) will make the A/F go leaner, and hotter air will make the car run richer. __________________ 2009 PW Sport/Touring/Nav M6 Stillen Gen 3 Intake/CBE/Berk HFC/BC BR Coil over/Phillips 6500k/Hotchkis Sways/Stillen oil cooler/B&M SS

07-08-2009, 10:09 PM	#21 (permalink)
ZPirate Track Member Join Date: Dec 2008 Location: Greenville, NC Posts: 792 Drives: 09' 370Z & 03' 350Z Rep Power: 18	Looks good Steve. Perhaps I can check out your latest creation this weekend. __________________ 2003 Daytona Blue 350Z Touring/Nismo 2009 Platinum Graphite 370Z Touring/Sport (Sold) 2009 BMW 135i/Dinan Stage 2 software upgrade/M3 suspension piecies/Koni Sports/ETS FMIC/Alufelgen SF-71 wheels

07-10-2009, 03:23 PM	#25 (permalink)
NIZMOZ Track Member Join Date: Nov 2008 Location: San Antonio, TX Posts: 634 Drives: 07 NISMO 350Z SA M6 Rep Power: 491	Where did you get the hose and the circular parts? __________________ SOLD: 2007 NISMO 350Z #0044 Silver Alloy New DD: 2010 Titan Pro4X CC

07-12-2009, 11:03 PM	#30 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	Thanks for the info. I'll be doing this this week. Any pictures from further away, just to see if it looks completely silly or not :P Last edited by RCZ; 07-12-2009 at 11:18 PM.

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07-09-2009, 08:51 PM	#23 (permalink)
edeeZee Track Member Join Date: May 2009 Location: s. cali, los angeles Posts: 627 Drives: 09 370z plat 6 speed Rep Power: 266	Nice work...maybe you can become a manufacturer of high-performance parts a la Stillen, HKS, etc.

07-10-2009, 02:58 PM	#24 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 16	Modshack, I installed your cai ventilation system last night and all went smoothly. I do have a one question. Does a 2.5" tube allow enough air to enter the filter area - I noticed after my installation that you trimmed the aluminum flanges. Was that to allow more air in off the sides or just to make it fit? Also, were you able to route the tubes so they can't be seen from the front - haven't been able to do that yet. Thanks.