Whats so special about the 300zx mafs? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

killjoy · 07-29-2002, 01:37 PM

Is it the electronic part of it or what?  People always say that you gotta have one when you upgrade the turbo and injectors but what do they do and why is it an upgrade for an sr20det?

junia · 07-29-2002, 02:17 PM

Well, the Z32 afm's are bigger than the ones that are used on the 240/180/silvia.  From what I read in one of the old carboy magazine they're good to about 400-500 HP.  Thats why when you see a single turbo configuration on a high HP GTR you see two z32 afm's on the intake.  Of course you don't need it if you're running somthing like a V-pro or a VPC or similar.

ruf · 07-29-2002, 03:09 PM

Air flow. The stock MAFS is a bottleneck and won't flow enough air to support 300+hp. I don't understand running 2 of them though.

rotaryknight · 07-29-2002, 03:37 PM

Basically you question has been answered.  MAF are really not the best for turbocharged application but is better for dailydriven cars.  The FD is speed density which has it good and bad.

The best case senario would be to remove the MAF completly.  From HKS thier VPC, FCON-S and FCON-V Pro will all remove the MAF.

Apex'i does have one version of the Power FC that will allow you to remove the MAF but i'm not sure if they have an application for the SR I do know they have it for the RB26DETT.

07-29-2002, 01:37 PM	#1
killjoy Zilvia Member Join Date: Sep 2001 Location: San Antonio, TX Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	Is it the electronic part of it or what?  People always say that you gotta have one when you upgrade the turbo and injectors but what do they do and why is it an upgrade for an sr20det? __________________ stolen s13 new stock non-stolen s13

07-29-2002, 02:17 PM	#2
junia Zilvia Junkie Join Date: Jan 2002 Posts: 343 Trader Rating: (0) Feedback Score: 0 reviews	Well, the Z32 afm's are bigger than the ones that are used on the 240/180/silvia.  From what I read in one of the old carboy magazine they're good to about 400-500 HP.  Thats why when you see a single turbo configuration on a high HP GTR you see two z32 afm's on the intake.  Of course you don't need it if you're running somthing like a V-pro or a VPC or similar. __________________ 1990 Nissan 240sx hatchback, 1991 Nissan Silvia K's PS13, 1978 Toyota Corolla KE-30

07-29-2002, 03:37 PM	#4
rotaryknight Zilvia Junkie Join Date: Apr 2002 Posts: 408 Trader Rating: (0) Feedback Score: 0 reviews	Basically you question has been answered.  MAF are really not the best for turbocharged application but is better for dailydriven cars.  The FD is speed density which has it good and bad. The best case senario would be to remove the MAF completly.  From HKS thier VPC, FCON-S and FCON-V Pro will all remove the MAF. Apex'i does have one version of the Power FC that will allow you to remove the MAF but i'm not sure if they have an application for the SR I do know they have it for the RB26DETT. __________________ Daily Driver- 91 240 SX SE...S13 Blacktop HKS FMIC, EVC IV, W/G, Racing Suction, DP, Dual Drager, springs/pillow ball mounts Whiteline sway bars Tokico blues Koyo Radiator, Fluidyne fan J30 VLSD stock exterior. Fun Car- 94 FD3S (TO4S). The White HKS FD in FnF......may she rest in pieces.

07-29-2002, 03:09 PM	#3
ruf Zilvia FREAK! Join Date: Jul 2002 Location: Reflex Racing, Los Angeles,TX Posts: 1,160 Trader Rating: (0) Feedback Score: 0 reviews	Air flow. The stock MAFS is a bottleneck and won't flow enough air to support 300+hp. I don't understand running 2 of them though.