Modifying the stock Throttle body for more air flow

[beeza]

The finished product!









Next,check to see that your TB is opening 100%,most I've found are 96,97,98% If your's is like this,just file a bit off the throttle rotor until it is.Check regulary so you don't go too far

100%



If not file here





Putting it back together: Can be tricky at first..

Put the spring on the rotor to get it ready





Next put the other spring on the tps side like this



Then put the arm in,like this



Turn the arm clockwise 180 degrees and hold it there under tension.

Then fit the spring on like this.I didn't get a pic of it but there is a 2cm long metal tube thing that sits under the spring (oops..)



Hold it all there,dont let go! Now turn the rotor anti clockwise 180 degrees and push it on the arm,then put the washer and nut back on.



Will look like this on the other side now



Then put the tps on,like this



Then put the TB plate in there



Wiggle the plate around and get it to sit as closed as possible,then tighten the screws up.



Put it back in and Calibrate the tps and ya done!

Other comments:

Idle issues will only happen if U have filed too much off the TB plate and it is not sealing properly.

You can see mine isn't 100% sealed



Luckily I had a bit in my idle/air screw to play with,so I screwed that in and got it to idle perfectly.Now,no air goes through my idle/air screw and it idles from that small gap there,perfect.

On Tim's car the idle/air screw was turned right in,so we had to unscrew the throttle stop (TS) screw a bit so the plate would seal more.This put CT @ 0.43V and WOT remains @ 4.5V (The voltages U want are 0.48-.49V @ CT and 4.5V @ WOT) BUT that dosen't matter cause the car is running just awesome.

If the surging starts in the idle again we can still unscrew the TS screw to get it to seal more but if it throws the tps out too much ad/or it affects the running of the car,we will swap in another one I done.

Well! Time for a shower and a break!

Hello



Can U see the Great Cormorant?





He supported me,all day!



Oh,I guess ya wanna know the RESULTS?!?!

Yup! We have a winner! Kinda feels like after a Suburu upper engine clean,revs more freely now,accelerates quicker,smoother running.

I'm Loving it!

A 60mm TB is too much on a slightly modified d-series.U need to have done ECU or internal work for it to work.

This is what got me thinking,well,what can I do to my TB then?

Hope U liked it,

Brett.