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-   Engine Performance (https://www.miataturbo.net/engine-performance-56/)
-   -   MAF swap (https://www.miataturbo.net/engine-performance-56/maf-swap-74045/)

concealer404 07-23-2013 02:35 PM


Originally Posted by mitchellrg (Post 1035792)
The only dumb question is the one not asked for fear of ridicule.

I am a newb but I refuse to believe that all mods have been tried. Sure, there is a generic tried and true method to everything we do. I just like to explore other options so I ask folks like you who have alot more experiance and knowledge in the area. From the good and bad responses I have recieved I know I can put the idea to rest.

No, I do not plan on a turbo. My plan ... one day ... if it will fit ... is the 3.7v6 out the current mustang. The whole motor only weighs 20lbs more than the 1.8, but that will be after my 1.8 fails or I kill it trying to do some DUMB mod that I didnt ask question about.


You don't even plan on doing engine swaps the correct way. Everything you want to do is half-assed.

Piggyback and Maf swap to get almost-kindof-sortof-not-really to a standalone...

Motor swap that's missing two cylinders...

Racelands instead of a suspension worth a fuck...

mitchellrg 07-23-2013 02:54 PM

Please kill this thread as my feeling are so hurt I will simply burry my head in the sand, sell my miata and jump off a cliff. Oh wait, just kill the thread please.

concealer404 07-23-2013 02:56 PM

Help me help you.

dieselmiata 07-23-2013 03:16 PM

1 Attachment(s)
No intentions of going turbo.

Joins Miataturbo for advice.


https://www.miataturbo.net/attachmen...ine=1374606976

Too soon?

Vilko 07-23-2013 09:06 PM

Welcome to miataturbo, the only car forum where "haters gonna hate" is not a valid argument!

FRT_Fun 07-23-2013 09:32 PM

#1 all time hater award will forever goto Scott. He is my hero. He hates even when he doesn't mean to hate.

dieselmiata 07-23-2013 09:46 PM

I hate you for hating.

RussellT94 07-23-2013 09:51 PM

2 Attachment(s)
Attachment 83501

FRT_Fun 07-23-2013 09:52 PM

Somewhere in the world Scott is hating on something/someone right now.

Stealth97 07-23-2013 10:01 PM

Even 1.8 MAF is excrement. I gained 5rwhp just by removing it, and that's N/A

dieselmiata 07-23-2013 10:04 PM

That's nothing. I gained 10RWHP just by excrementing into my MAF. :party:

tpwalsh 07-23-2013 10:06 PM


Originally Posted by Stealth97 (Post 1035949)
Even 1.8 MAF is excrement. I gained 5rwhp just by removing it, and that's N/A

'cause the 1.6 didn't have a MAF. It had an AFM. Different principles, different response curves. Also there are loads better hotwire MAFs out there than the 1.8NA's.

mitchellrg 07-23-2013 11:15 PM


Originally Posted by tpwalsh (Post 1035952)
'cause the 1.6 didn't have a MAF. It had an AFM. Different principles, different response curves. Also there are loads better hotwire MAFs out there than the 1.8NA's.

Can you list a few?

iantboyd 07-24-2013 02:40 AM

*disclaimer: I agree with the trend in this thread, waste of effort and money. Get megasquirt or mod your suspension.

That being said, all the brokedicks in the protege/323/escort world "think" it is beneficial to swap the electronics out of the stock vaf(flapper box) into a vaf with a larger body. Typically from the F2/F2t powered mx6 or probes. Look up k-code hybrid for more. IMHO, any "gains" will only exist in your head.

Edit: didn't realize op had an obd-II car.

codrus 07-24-2013 04:13 AM


Originally Posted by Stealth97 (Post 1035949)
Even 1.8 MAF is excrement. I gained 5rwhp just by removing it, and that's N/A

The NA 1.8 MAF is pretty restrictive, but the NB one isn't too bad.

MAF vs Speed/Density -- in principle, MAF should be better. Instead of baking the VE of the motor into a 3d table so that you can extrapolate from MAP & RPM into a fuel amount, you just directly measure the air going in. As for why it's not more prevalent in the aftermarket, most of the downsides to Speed/Density come from a comparative lack of flexibility in dealing with changes to the motor's VE. With a factory computer that sucks because if you put a better-flowing exhaust on the engine, then suddenly the fueling is all wrong and you can't fix it. With an aftermarket computer it's still wrong, except you have a wideband so the computer can cope and then you just fix it. So S/D is cheaper and easier and doesn't have a major downside, so why use MAF?

People who tune cars with reprogrammable factory computers and factory MAF sensors often stick with the MAF sensor.

--Ian

codrus 07-24-2013 04:33 AM

4 Attachment(s)

Originally Posted by iantboyd (Post 1035980)
*disclaimer: I agree with the trend in this thread, waste of effort and money. Get megasquirt or mod your suspension.

That being said, all the brokedicks in the protege/323/escort world "think" it is beneficial to swap the electronics out of the stock vaf(flapper box) into a vaf with a larger body. Typically from the kl powered mx6 or probes. Look up k-code hybrid for more. IMHO, any "gains" will only exist in your head.

OP has a 97, so he's got a hot wire, not a flapper door.

That said, swapping to the Rx-7 flapper door on the 1.6 cars is one of the commonly accepted cheap small hp mods. Sure it was only worth a few hp, but the Rx-7 sensors were cheap and easy to get. Doesn't work on a 97 though.

The NB MAF is less restrictive, but I have no idea if it would work with a 97 ECU or not.

NA MAF:
https://www.miataturbo.net/attachmen...ine=1374654789
NB MAF:
https://www.miataturbo.net/attachmen...ine=1374654789

Looking on ebay, you can get a 99 MAF for $40; let's imagine that it worked right with nothing but some wiring harness hackery (possible, but unlikely) and let's say it's worth 2 hp. At $20/hp that's about the same ratio as a turbo kit. The downside is that you'll be throwing that $40 away if/when you get tired of tiny hp mods that you can't feel and go to a megasquirt. It's the same as how a header is a waste of money when you get tired of piddling little naturally aspirated mods and go with a turbo. :)

--Ian

mitchellrg 07-24-2013 08:22 AM


Originally Posted by codrus (Post 1035988)
OP has a 97, so he's got a hot wire, not a flapper door.

That said, swapping to the Rx-7 flapper door on the 1.6 cars is one of the commonly accepted cheap small hp mods. Sure it was only worth a few hp, but the Rx-7 sensors were cheap and easy to get. Doesn't work on a 97 though.

The NB MAF is less restrictive, but I have no idea if it would work with a 97 ECU or not.

NA MAF:
https://www.miataturbo.net/attachmen...ine=1374654789
NB MAF:
https://www.miataturbo.net/attachmen...ine=1374654789

Looking on ebay, you can get a 99 MAF for $40; let's imagine that it worked right with nothing but some wiring harness hackery (possible, but unlikely) and let's say it's worth 2 hp. At $20/hp that's about the same ratio as a turbo kit. The downside is that you'll be throwing that $40 away if/when you get tired of tiny hp mods that you can't feel and go to a megasquirt. It's the same as how a header is a waste of money when you get tired of piddling little naturally aspirated mods and go with a turbo. :)

--Ian

Thank you. The best reply yet.

tpwalsh 07-24-2013 08:44 AM

2 Attachment(s)

Originally Posted by mitchellrg (Post 1035965)
Can you list a few?

I was thinking something along the lines of a 4.6L MAF

https://www.miataturbo.net/attachmen...ine=1374669841

Or a Bosch MAF

https://www.miataturbo.net/attachmen...ine=1374669841

Braineack 07-24-2013 08:45 AM

Tell us more about spending hundreds of dollars in order to make 0.25rwhp...

concealer404 07-24-2013 08:52 AM


Originally Posted by iantboyd (Post 1035980)
*disclaimer: I agree with the trend in this thread, waste of effort and money. Get megasquirt or mod your suspension.

That being said, all the brokedicks in the protege/323/escort world "think" it is beneficial to swap the electronics out of the stock vaf(flapper box) into a vaf with a larger body. Typically from the kl powered mx6 or probes. Look up k-code hybrid for more. IMHO, any "gains" will only exist in your head.


That's.... not really correct at all. They're using the flapper boxes you speak of, which are not present at all in any KL car.

They're using RX7 units, and the K-code Hybrid is probably something to do with F2-powered 1st gen MX6/Probe.

The KL unit is more of a "sliding booby nipple" type deal. I personally think it's far worse than a flapper, which is probably why those guys pick up so much power with a Millenia MAF conversion.


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