What MAF will do 1000whp?

[Beanstalk]

My tuner said it cant be done. I was told I had to go speed dens. (MAP) to make that kind of power. I know supras do it and are all skylines that make 1k map cars?

[Yellow4g63]

Yes map. only maf I know of that will get to 700hp (even that I'm not sure of) is the Ford lightning maf.

[Darius]

This is what I will be considering for the next round of add-ons if I decide to stick with a MAF setup.

http://www.sctflash.com/BigAir.php

I don't know what these MAFs will truly support for horsepower, but I'm sure as hell not going for >825 HP

BTW, I e-mailed these guys asking them if they would divulge the 0-5V curve for their MAF and they told me, "We don't support imports." So you'd have to put the thing on a flow bench and record the voltages associated with varying air flow until it pegged out at 5.0V.

[DrifterProdigy85]

You can also run a Dummy MAF and use 2 Z32 MAF's. Enthalpy was telling me about how its done but i havnt fooled around with ecu tuning to understand it entirely. Contact him and find out. I know it has to do with splitting the MAF voltage in half since you have 2 MAF's metering the air.

[Darius]

Yes, you can also run a dual intake system with only one of the intakes being metered. This way, you can halve the air flow values of the Z32 MAF for a given voltage signal (or whatever MAF you have).

The first drawback to doing it this way is that the intakes and piping need to be as identical as possible to ensure equal air flow into each intake pipe. The second drawback to this setup is finding the space to run twin inlet filters.

With either a custom MAF or dual intakes and one MAF, I haven't heard of anyone in the states doing the modification.

[ItzGenX]

You can always dismantle a z32 maf and mount the sensor part of it on a larger diameter pipe. You would have to tune solely from scratch like most other custom setups, but the sensor itself is already made to run 0-5v.

[s14_sport]

I'm using a Ford Ligtening Maf on my RB right now and yes it maxes out at about 700hp which is loads more then I plan on running anyway.

A friend of mine put out 667hp on his RB using the lightening MAF last drag season and is redoing his setup now for over 800hp and now you've got me wondering what he is going to use now...I'll find out and let you know.

[Darius]

You can always dismantle a z32 maf and mount the sensor part of it on a larger diameter pipe. You would have to tune solely from scratch like most other custom setups, but the sensor itself is already made to run 0-5v.

The only problem with swapping a MAF sensor into a larger diameter pipe is that it is not going to read at the center of that pipe which means the velocity of the air is lower towards the perimeter. Lower velocity means less cooling of the hot wire for a given air rate and the engine will run lean. There is probably no way to predict the extent of it but it probably won't even be noticed in the grand scheme of things.

If you're swapping a MAF into a larger diameter pipe AND running it in a blow-thru setup, there is always the chance for the housing to crack or leak or whatever under pressure. Just throwing that in there.

I'd take a serious look at aftermarket lightning/cobra MAF sensors if you are serious about hitting some high horsepower.

[Yellow4g63]

I'm using a Ford Ligtening Maf on my RB right now and yes it maxes out at about 700hp which is loads more then I plan on running anyway.

A friend of mine put out 667hp on his RB using the lightening MAF last drag season and is redoing his setup now for over 800hp and now you've got me wondering what he is going to use now...I'll find out and let you know.

Did he blow through or draw through with his setup?

[lyon23]

What about twin Q45 mafs.

[Cjmartz2k]

Q45's flow less than Z32's. They are just bigger in diameter, but they peak out sooner.

Twin Z32's should flow about 800-900rwhp I'd guess. If you need more and want to stay MAF'd, use the GTR Pwer FC with a factory twin MAF setup, and put lightening MAF's on it. seeing as how a single Z32 maf will do 400-450rwhp, and a single lightening maf seems to be good to around 600rwhp from what I'm hearing, double that and that's a lot of air/HP measuring potential.

[DrifterProdigy85]

450whp on a Z32 MAF is conservative. I did 502whp with the one i had on my SR. Martin at Z Fever has gotten 550whp on them already. If your seriously pushing the power, the twin intake setup would be the way to go.

[Cjmartz2k]

On what kind of dyno?

[BHFR-GTR]

900+ hp here twin 300zx mafs

[DrifterProdigy85]

Dynojet numbers. Power was backed up by running 130mph trap speed in the 1/4 and the car weighed 2820 with me and a full tank of gas.

[Beanstalk]

900+ hp here twin 300zx mafs

Hey where did you get this pic?

[meet07]

I agree with some of the guys about swapping over to one single ford maf or twins....I always like the way the gtr's look with twin maf...

Personally i hate a maf...they get in the way and its hard to make a nice intake system with like 8 inches of maf/filter...

im going to try my luck with the EMU when its time.

[jrhdohc]

Not sure what ecu you are using. Just wanted to throw out another possibility. Factory ecu's can be chipped to rescale the MAF but some have limits. Changing from a 280hp MAF to 500hp MAF shouldn't be a problem. 400 to 800 might be ok too. But, moving from 280 to 800-1000 might be too much for the ecu to handle. it's basically like the Y2K thing; not enough digits. This is also true for increasing the size of the injectors.

Cost is also a factor. If you want to run twin Z32, $350 x 2. Plus, aftermarket ecu. $1000-2000. Proper wiring harness $300. Tuning 500-1000. That adds up to MOTEC or HKS Fcon V pro MAP set ups. Sure, you could get used parts and skimp on harness and tuning but reliability and driveability will decrease.

It is more cost effective to get AEM w/ MAP or D-Jetro Apexi Power FC.

Just my two cents. after 10 years of not listening to Japanese tuners because I thought I could reinvent the wheel for cheaper. Just make the jump to MAP if you really need/want that kind of crazy hp.

[DrifterProdigy85]

I've been looking into the haltech ps2000. The software is real easy to use and it's got ton of features with unlimited possibilities for power it seems.

[DustinZ]

The Selrin Dual MAF translator works great on the z's.

http://www.z1motorsports.com/p...1fc07

[ftpolkkouki]

Why don't you run the Apexi Power FC to avoid having to use a MAF.

[Cjmartz2k]

Why don't you run the Apexi Power FC to avoid having to use a MAF.

First, REMOVE THAT HUGE a** PIC FROM YOUR SIG. Second, do you understand the fact the power FC's come in both MAP and MAF flavors? Simply suggesting the most well known aftermarket ecu as a soultion to a problem where people can't use the Z32 MAF which supports over 500rwhp because it's not big enough probably isn't going to be very helpful. Somebody talking about making 1000hp isn't going to be doing it with a SAFC. I'd bet he already has a MAF style Power FC and wants to stick with it since they are so expensive. I'm sure he has his reasons for not going D-jetro (MAP) power fc or something like a haltec or F-con V-pro.

Now hush, the grown-ups are talking.

[jrhdohc]

The Selrin Dual MAF translator works great on the z's.

http://www.z1motorsports.com/p...1fc07

Cool product. I'm going to buy one just to show the Japanese tuners. They will get a kick out of it. Just think, RB26 computer, 2 Selin Dual MAF Translators, with 4 Z32 MAF's. 2000hp max. haha...

Why don't you run the Apexi Power FC to avoid having to use a MAF.

If you go with Apexi. Make sure you use D-Jetro version of Pwr FC to convert to MAP. The normal Pwr FC uses MAF. Apexi never made D-Jetro for RB25 so you'll need RB26 D-Jetro Pwr FC. Your NVTC will be disabled... use RB26 intake cam and adjustable cam pulley. If your goal is 1000whp you'll want to get rid of the NVTC crap anyway and switch to longer duration cams. Also, the knock sensor will be out of calibration. On average, RB25s create more noise than RB26s so knock calibrations on RB26 computers have a less filtering(i.e. more sensitive). This isn't a big problem because Pwr FC doesn't have knock feedback control and therefore won't retard your timing for false knock readings (of course it won't protect your engine either). Just keep that in mind when monitoring knock levels on your Commander.

[jrhdohc]

First, REMOVE THAT HUGE a** PIC FROM YOUR SIG. Second, do you understand the fact the power FC's come in both MAP and MAF flavors? Simply suggesting the most well known aftermarket ecu as a soultion to a problem where people can't use the Z32 MAF which supports over 500rwhp because it's not big enough probably isn't going to be very helpful. Somebody talking about making 1000hp isn't going to be doing it with a SAFC. I'd bet he already has a MAF style Power FC and wants to stick with it since they are so expensive. I'm sure he has his reasons for not going D-jetro (MAP) power fc or something like a haltec or F-con V-pro.

Now hush, the grown-ups are talking.

IF.... he already has a L-Jetro RB25 Pwr FC then he can't make his goal. No off the shelf 1000whp MAF. Changing the ECU to a dual MAF unit or MAP will be required. (single MAF could be made and flow benched but mucho$$)IF.... he already has a L-Jetro RB26 Pwr FC then he wouldn't have made the post. his tuner would just get him twin Z32.

IF.... We want to help him then the best advice is MAP.

[rb25det250sx]

what do all all the 2JZ guys use...i see alot of them are still using a draw through set-up, and making hellatious HP.

[DrifterProdigy85]

Alot of Supra guys use the VPC or MAP ECU 1 or 2. A ton of them upgrade to AEM EMS as a first upgrade too. Supra guys arent afraid to spend some money. lol.

[jrhdohc]

what do all all the 2JZ guys use...i see alot of them are still using a draw through set-up, and making hellatious HP.

2JZ has both MAF and MAP stock. Lower power (stock) MAF is Load and MAP is boost sensor. Medium power they disable the stock MAF and run MAP for Load. I think it's good for around 1.5 bar. High power a huge single turbo with aftermarket 3-4 bar sensor.

[jrhdohc]

2JZ has both MAF and MAP stock. Lower power (stock) MAF is Load and MAP is boost sensor. Medium power they disable the stock MAF and run MAP for Load. I think it's good for around 1.5 bar. High power a huge single turbo with aftermarket 3-4 bar sensor.

by the way that's Japanese guys don't know what american's do.

[Cjmartz2k]

There are in fact aftermarket off the shelf 0-5v MAF sensors capable of measuring 1000hp. Most people just choose to go a different route. I did. I went to a RB26 D-jetro Power FC on my 25, but not after I made the same horsepower on my RB25 Power FC with a Z32 MAF hacked and put into 4" piping. I was around 600hp at only 4.2v, and had plenty more hp measuring ability to go. I recommend a MAP based ecu, but MAF can be done with aftermarket and hacked factory stuff.

[Cjmartz2k]

BTW, the MAF's I'm talking about are generally sold to the ford crowd, but it's just a 0-5v hot wire sensor, just like what a stock RB25, Z32, or Q45 MAF. Only difference in using one is you'll have to figure out the wiring (not hard) and rescale the curve instead of having a pre-set option in the Power FC.