Jump to content
SAU Community

Greddy Plenum + Trust Throttle Body Questions

Jamie88

By Jamie88,
in Engines & Forced Induction

 Share

Recommended Posts

Jamie88 Community Regular

Jamie88

Posted
Posted

Hey guys,

To cut a long story short I'm building my motor in my 33 (rb25det) with forged internals, bit of head porting etc and amongst all the mods I have a genuine Greddy plenum on its way with a trust throttle body. Ok since I have not recieved it yet I am guessing the size of the throttle body is 90mm. Anyway my dilemma is I dont know how to go about the intercooler piping. As my intent was to upgrade my intercooler from my ebay front mount kit I wanted your opinions on which direction to follow. Remembering, bottom line is that my cooler I have now only has 2.5inch entry on either side. Obviosuly, for a minimal fix, the only cooler pipe that has to be tampered with is the one that joins the plenum , but I am seeking the best result so would like your opinions.

Should I:

- Use the Trust throttle body and use a silicon reducer down to my 2.5inch pipe size and keep the cooler setup the way it is?

- Get a throttle body adapter and use my standard t/b, sell the trust one and keep the cooler setup the way it is?

-Try and find a cooler kit with larger piping to suit the larger throttle body and forward facing plenum?

My biggest concern is not getting efficeincy out of my bigger t/b if my piping and cooler intake on that side is only 2.5 inch. Sorry about the big writeup, just wanting a bit of advice on which way to go.

Im also installing an afc neo, just to keep things running smoothly, does anyone think I will NEED a standalone ecu, or this should to the trick.

Appreciate your time!

Jamie

Jamie88 Community Regular

Jamie88

Posted
  • Author
Posted
Just get a 3 inch neck welded to your existing intercooler.

I was considering that, but the cooler is terrible quality core....typical ebay crap. So if hks or Greddy already made a coolerkit with 3 inch on that side to suit. I was gonna look into that?

Jamie88 Community Regular

Jamie88

Posted
  • Author
Posted
Trust do a GTR kit that suits the Greddy FF plenum on RB25\26, piping suits Q45 TB "FROM" the intercooler :D

Is that both sides of the core or just the plenum side? I wasnt planning on touching the other side, but that I suppose defeats the purpose of having it bigger one one side as well. haha what am I to do people?!

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

    • Duncan
      S1 rb25/s14 starting problem

      By Duncan · Posted

      Depending on how long the car sat it is very possible for injectors to be stuck open or closed, I'd get them cleaned and flow tested. Other than that, obviously when the loom changes and the car doesn't start any more....the loom is suspect so some tracing / comparing may be required
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Waders360
      M35 Brake caliper replacement

      By Waders360 · Posted

      Sorry. Front brake calipers
    • MBS206
      S1 rb25/s14 starting problem

      By MBS206 · Posted

      Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • 25zenki
      S1 rb25/s14 starting problem

      By 25zenki · Posted

      I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
×
×
  • Create New...