Technical info on Z intake set up

Modshack · 05-23-2010, 09:00 AM

1) MAF

2) 2.33 (at the MAF) 2.75 at the Throttle body

3) No

CAI and custom MAF tube project: CAI experimental.....> album | Ttschwing | Fotki.com

Jordo! · 05-23-2010, 11:37 PM

Quote:

Originally Posted by Modshack

1) MAF

2) 2.33 (at the MAF) 2.75 at the Throttle body

3) No

CAI and custom MAF tube project: CAI experimental.....> album | Ttschwing | Fotki.com

^^^ Very nice project -- looks great! How has it worked out for you? Dyno? Driveability quirks?

Oh. what size filters do you use?

So no screen or vanes before the MAF sensor? Not even further ahead at the airbox opening? That makes life easier.

Varying the ID from 2.33" is definitely going to affect fuel trims and possibly also tip-in drivebility without tuning.

The wider tubing past the MAF sensor probably doesn't matter all that much as everything's clocked accoring to the diameter just before the MAF.

1slow370 · 05-24-2010, 01:09 AM

there is a map sensor on the car as well so it may be involved in some of the ecu's functions

Jordo! · 05-24-2010, 03:49 AM

Quote:

Originally Posted by 1slow370

there is a map sensor on the car as well so it may be involved in some of the ecu's functions

Really? So one MAF sensor for each bank of cylinders AND a MAP sensor?

Hmm. Tuning must be fun... I wonder how the ECU interpolates load from each sensor or whether it averages them... well the MAP will potentially make tuning for FI a bit easier...

Modshack · 05-24-2010, 08:24 AM

Quote:

Originally Posted by Jordo!

^^^ Very nice project -- looks great! How has it worked out for you? Dyno? Driveability quirks?

Oh. what size filters do you use?

So no screen or vanes before the MAF sensor? Not even further ahead at the airbox opening? That makes life easier.

Varying the ID from 2.33" is definitely going to affect fuel trims and possibly also tip-in drivebility without tuning.

The wider tubing past the MAF sensor probably doesn't matter all that much as everything's clocked accoring to the diameter just before the MAF.

Thanks...Works great. I design for driveability, not dyno numbers.
No screening at all. Seems this particular Hitachi sensor works well without. The same MAF was in my '08 corvette with no screens either.

Custom MAF is now at 2.39" and fuel trims at about -2% which is way closer than stock.

I'm sure the bigger tubing past the MAF has a plenum effect.

On A MAP sensor that islow mentioned, i'm curious about that statement. It's not in the intake tract that I have seen. Typical on turbo cars. N/A cars that use them do so to balance out variances in Barometric pressure IMO..it may be somewhere.

Jordo! · 05-24-2010, 04:23 PM

Quote:

Originally Posted by Modshack

Thanks...Works great. I design for driveability, not dyno numbers.
No screening at all. Seems this particular Hitachi sensor works well without. The same MAF was in my '08 corvette with no screens either.

Custom MAF is now at 2.39" and fuel trims at about -2% which is way closer than stock.

I'm sure the bigger tubing past the MAF has a plenum effect.

On A MAP sensor that islow mentioned, i'm curious about that statement. It's not in the intake tract that I have seen. Typical on turbo cars. N/A cars that use them do so to balance out variances in Barometric pressure IMO..it may be somewhere.

Wow -- awesome! You should definitely dyno to see if you picked up some power. +/-2 LTFT's are nothing -- great job!

05-23-2010, 09:00 AM	#1 (permalink)
Modshack A True Z Fanatic Join Date: Mar 2009 Location: Greenville NC Posts: 2,883 Drives: 370Z Sport Rep Power: 977	1) MAF 2) 2.33 (at the MAF) 2.75 at the Throttle body 3) No CAI and custom MAF tube project: CAI experimental.....> album \| Ttschwing \| Fotki.com __________________ Steal my car! (SOLD)...Now Porsche Cayman S Oil Cooler DIY: Here!

05-24-2010, 01:09 AM	#3 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	there is a map sensor on the car as well so it may be involved in some of the ecu's functions __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

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