Jump to content
SAU Community

Custom Afm

Dj laBBy

By Dj laBBy,
in Fabrication

 Share

Recommended Posts

Dj laBBy Collaborator

Dj laBBy

Posted
Posted

Hey anyone made a custom AFM??

Am thinking of using a Q45 (90mm 3.5") internals and plumbing it into a 4"pipe.

The reason you might say, to slow the air speed through the meter which will give a greater scope. Undoubtly 4" is not much of an increase, but i can also bolt it straight to the 4" turbo inlet and use a 4" filter. I was maxed out at 20psi (260rwkw) so maybe this may help a little.

Plus it is custom and i like tinkering. hehehe

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/
Share on other sites
Dj laBBy Collaborator

Dj laBBy

Posted
  • Author
Posted
your telling me you maxed out a q45 afm at 20psi and only made 260rwkw that doesnt sound right.. more info please

Ah good question.

Had low comp pistons and rb25 head, =extra low comp setup. It was somwhere around the low 7's cr.

When you think about it, 20psi is great for an AFM on rb30 setup, but it was the comp that was killing me, saying that it was an ignition monster, just wanted more and more. Could've thrown 30psi in there and it would've been happy.

However i have high comp standard rb30 pistons in there now so comp is a little more respectful, though would love to make over 300rwkw. So we just see.

Mate its a good experiment just to see how it all goes. plus "Custom" love custom!!!

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-2983997
Share on other sites
djr81 Grand Master

djr81

Posted
Posted
Hey anyone made a custom AFM??

Am thinking of using a Q45 (90mm 3.5") internals and plumbing it into a 4"pipe.

The reason you might say, to slow the air speed through the meter which will give a greater scope. Undoubtly 4" is not much of an increase, but i can also bolt it straight to the 4" turbo inlet and use a 4" filter. I was maxed out at 20psi (260rwkw) so maybe this may help a little.

Plus it is custom and i like tinkering. hehehe

My understanding is that if you change the internal diameter of the pipe in which the air flow meter resides you change the calibration of the meter.

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-2984524
Share on other sites
Craved Grand Master

Craved

Posted
Posted
My understanding is that if you change the internal diameter of the pipe in which the air flow meter resides you change the calibration of the meter.

thats more than likely trua and something that has already been discussed in the Forced induction section.

the modifictaion to the AFM would require you to create a boxed section one the side of the inlet pipe and im assuming that it would require it to be on a straight section too to ensure the flow is even through the meter.

be some fiddly work to get the mounting threads welded on to keep the unit flat inside your box.

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-2984602
Share on other sites
Dj laBBy Collaborator

Dj laBBy

Posted
  • Author
Posted

Yah calibrated, true, but basically whats the difference in calibration when you tune the car for the new calibration?? Yah am running a Power FC, so its all good. The only time you'd be worried about "calibration" so to speak is when you are using the standard comp.

Basically this way you are kinda tricking (real lamens terms) the computer there is less air going through the AFM, the just adjust the mixtures to suit, not rocket science.

Yah tricky making a box?? well really all you need to do is to get a bit of pipe, machine or file a basic flat, make a base plate, weld that on, then by cutting some ally plate say 20mmhigh x what ever the standard width is, then just weld it all up. Screw the AFM unit in and just silicon on a top if you can't be bothered tapping and screwing the top.

Piece of piss(if your a welder/fabricator)

Was thinking of it last night in bed for about an hour. Should hopefully have started it and maybe some pics by monday.

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-2985319
Share on other sites
Craved Grand Master

Craved

Posted
Posted
Yah calibrated, true, but basically whats the difference in calibration when you tune the car for the new calibration?? Yah am running a Power FC, so its all good. The only time you'd be worried about "calibration" so to speak is when you are using the standard comp.

Basically this way you are kinda tricking (real lamens terms) the computer there is less air going through the AFM, the just adjust the mixtures to suit, not rocket science.

Yah tricky making a box?? well really all you need to do is to get a bit of pipe, machine or file a basic flat, make a base plate, weld that on, then by cutting some ally plate say 20mmhigh x what ever the standard width is, then just weld it all up. Screw the AFM unit in and just silicon on a top if you can't be bothered tapping and screwing the top.

Piece of piss(if your a welder/fabricator)

Was thinking of it last night in bed for about an hour. Should hopefully have started it and maybe some pics by monday.

only reason if that would be tricky is if the underside of the circuit board isnt flat

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-2985336
Share on other sites
  • 2 months later...
Medium Dave Proficient

Medium Dave

Posted
Posted
Yah calibrated, true, but basically whats the difference in calibration when you tune the car for the new calibration?? Yah am running a Power FC, so its all good. The only time you'd be worried about "calibration" so to speak is when you are using the standard comp.

Basically this way you are kinda tricking (real lamens terms) the computer there is less air going through the AFM, the just adjust the mixtures to suit, not rocket science.

Yah tricky making a box?? well really all you need to do is to get a bit of pipe, machine or file a basic flat, make a base plate, weld that on, then by cutting some ally plate say 20mmhigh x what ever the standard width is, then just weld it all up. Screw the AFM unit in and just silicon on a top if you can't be bothered tapping and screwing the top.

Piece of piss(if your a welder/fabricator)

Was thinking of it last night in bed for about an hour. Should hopefully have started it and maybe some pics by monday.

Might be a bit of science in it, the afm reads the airflow and outputs in a logarithmic curve, then the computer outputs that in a linear curve using a conversion table, by increasing the diameter you may throw the curve well out of whack. How's it all going anyway? im curious to know

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-3135213
Share on other sites
  • 3 weeks later...
  • 3 weeks later...
Craved Grand Master

Craved

Posted
Posted

Hi, I don't know much about air flow meters but i need one for my 95 series 2 gtst skyline.

Can anyone advise me on what one to get and where to get it from?

Cheers.

You will get a better response in the Forced Induction section.

stick with STD or if you have a Power FC and are chasing power try a Z32..

Search in FI if you are unsure about this

Link to comment
https://www.sau.com.au/forums/topic/160559-custom-afm/#findComment-3203032
Share on other sites
  • 1 month later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • TurboTapin
      boost source Size Garrett gt28 gen2

      By TurboTapin · Posted

      You just need to remove the compressor housing, not the entire turbo. I would not be drilling and tapping anything with the housing still on anyways. 
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • QB6SAGR
      Battle of the broken skylines

      By QB6SAGR · Posted

      Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • cosline
      R32 gtr transmission strength, billet plate

      By cosline · Posted

      Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Rezz
      Spotted on the street....

      By Rezz · Posted

      Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
×
×
  • Create New...