Jump to content
SAU Community

Question About Upgrade Afms

vspecll

By vspecll,
in Engines & Forced Induction

 Share

Recommended Posts

vspecll Contributor

vspecll

Posted
Posted

Has anyone fitted Q45 airflow meters to a gtr with factory plumbing. Can it be done?

I know Z32s will stretch over the original rubber piping but I don't think Q45s will?

If you know they don't what did you use to get them to fit. I want to keep the original air box look ( it has exstensive modifing underneath) so it all looks standard and legal.

Thanks in advance.

oh, what about the wiring plug ? ( have a PFC so just have to wire up?) any diagrams out there?

:)

Link to comment
Share on other sites
rb26s13 Mentor

rb26s13

Posted
Posted (edited)

stock sort of setup.. go z32's you should be able to get them to bolt up to a stock sort of setup with out to much hassle

q45's really are a BIG afm only time i'd ever go twin q45's would be running a big twin highmount setup..

Edited by rb26s13
Link to comment
Share on other sites
Blitz Grand Master

Blitz

Posted
Posted
or purchase Nismo AFM's.

I would never bother buying a 2nd hand AFM when new is generally only $100 more, and less hassle of a 10yr old AFM playing up

:werd:

Particularly since new Z32's have dropped to almost half the price. They used to be around $800 each new from Nissan.

Used for $300~ or new for $400~ - No brainer really.

Link to comment
Share on other sites
Blitz Grand Master

Blitz

Posted
Posted
Ill be a test mule too i think for Bosch AFM's which im told are the same as Z32 :banana:

$150 new i think the price i was told... but we'll see what happens there

I dont think they are $150 Ash, but if I am wrong I will be sure to buy a few.

I have a feeling the Bosch ones are just over $300 each

Link to comment
Share on other sites
R31Nismoid Grand Master

R31Nismoid

Posted
Posted
I dont think they are $150 Ash, but if I am wrong I will be sure to buy a few.

I have a feeling the Bosch ones are just over $300 each

Hrm... i think mine was special trial price :D

Im not gonna get to that for a few months, and i havent decided 100% if im going to use upgraded AFM's at all.

But the bosch stuff is only a bonus because its in the country already, and i assume some sort of manufacturing warranty etc.

Just dont anyone hold thier breath as its not gonna happen tomorrow :laugh:

Link to comment
Share on other sites

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

    • Lithium
      Boost level and torque curve

      By Lithium · Posted

      There is a LOT of stuff that can be done, it all depends on how much time and money you want to spend on doing in.  Not all ECUs will be able to do it, and the more control you need the more time and knowledge needs to be put into making it work.  If you're willing to spend the time and money and have the right hardware and skills involved there's a lot that can be done. 
    • thx78
      Boost level and torque curve

      By thx78 · Posted

      I am impressed with all this level of adjustment. I didn't expect all this possibility
    • Lithium
      Boost level and torque curve

      By Lithium · Posted

      Correct.  In the case of the 500kw dyno plot I showed you the car actually runs two boost control solenoids for boost control and a 5psi wastegate spring.  It allows me to control how much boost pressure is applied to both sides of the wastegate valve at any point and fairly accurately control boost target as a result. I've tuned it so that it's able to target anywhere from 5psi to 25psi depending on what's needed.  The target tables I've set up in that car are Gear vs RPM, so every gear has potential for a different boost (and torque) curve.   First and second gear have quite low boost targets, third gear actually has different target boost all the way through the rpm range as it's a stock RB25 gearbox - the boost targets have been chosen to maintain a peak of 600nm (what the owner has set as the maximum torque he's happy with putting through the stock 3rd gear) but it carries that to the rev limiter.   The boost curve to achieve that is something of a ramp up, then hold, then ramp up again and the power curve looks more like a flat line haha.  
    • thx78
      Boost level and torque curve

      By thx78 · Posted

      so you can decrease or increase the boost depending on the diet as you wish?     by acting on the wastegate?
    • Lithium
      Boost level and torque curve

      By Lithium · Posted

      That's torque and power, it's all from a single run.  The boost curve is "held back" from it's peak target in the 3500rpm to 5000rpm range from memory, so it ramps hard to something like 18psi then climbs more progressively to 23psi nearer 5000rpm.   It makes the torque (and power) ramp more "natural" and less hard on parts and traction, it doesn't feel artificially held back.   
×
×
  • Create New...