Jump to content
SAU Community

Rb25 Throttle Body

tm_r33

By tm_r33,
in Engines & Forced Induction

 Share

Recommended Posts

tm_r33 Experienced

tm_r33

Posted
Posted

Hey all.

Im currently finishing off the new engine for my track car. The car is a series 2 r33 gtst and its a rb25/30 not that it should make a difference though. I have a greddy manifold on it and am looking around on the net for a throttle body.

I want one that bolts on to greddy manifold as im dont want to weld different flange on like some of the cheap shit requires.

Now I have noticed that some of the throttle bodys to suit rb25 and greddy plenum are specific to series one tps.

Now are they meaning that series one and series two r33 have different tps?

Or do the mean that the neo rb25 is a series two rb25 and they are calling all r33 gtst engines a series one rb25. I know of a few differences between s1 and s2 r33 gtst rb25 but havnt noticed the tps being different.

Can some one tell me where they have bought an 80mm inside diameter TB that suited a greddy or greddy style plenum and interfaced correctly with their tps and throttle cable etc in a s2 r33 gtst

Link to comment
https://www.sau.com.au/forums/topic/358214-rb25-throttle-body/
Share on other sites
Jack88 Experienced

Jack88

Posted
Posted

You will need a S13 silvia throttle cable as the R33 one isnt long enough and once fitted sits on too much of an angle. I bought a 80mm throttle body from a ebay store for my 25/30 ( im also runing the Greddy manifold) and insted of welding the spacer to the plenum that came with it i had the throttle body bolt holes re drilled so it would bolt right onto the plenum( the bolt hoels were only about 2mm out anyway. I also had a gouge machined out on the face of the throttle body to hold a O ring so it seals up against the plenum nicely and wont leak. Another issue with the ebay throttle bodys is the spindle that inserts into the TPS is too small and has alot of free play so you dont get an accurate reading from the TPS so you have to have the spindle built up with small welds then sanded to fit inside the TPS snugly.

The series one TPS is spindle driven and has one plug fixed to the side of it with another on a 5cm fly lead coming out of it. Series two TPS have two plugs fixed to the plastic body of the TPS and the way they mount to the throttle body is different ( When i bought my Greddy manifold it had a R34 TPS on it and its completly different to the series one R33 unit. I think the R33 series two TPS is the same as the R34 one. Also the pin out on the series one and two TPS is different so they are not plug and play but can be rewired to work.

Save yourself the hasle and just get the TPS which suits your engine loom.

NYTSKY Grand Master

NYTSKY

Posted
Posted

I have just upgraded to a Q45 throttle body so my Greddy throttle body adaptor is for sale.

Bolts straight onto the Greddy plenum and allows you to keep the standard throttle body.

Also has the Greddy logo on it to match the plenum :)

$100 Delivered.

tm_r33 Experienced

tm_r33

Posted
  • Author
Posted

Thanks for the info jack88. so by the sounds of it I should be searching for an r 34 gtt throttle body?

Do I uee sr20 or ca18 s13 throttle cable?

Ia also dont like the idea of the spindle being poxy and having play on cheeap items so it lools like ill have to buy jap which I bet will cost an arm and a leg. Any local options?

Thanks for the offer nytsky but im after an 80mm item. Will an aftermarket Q45 TB fit my wiring or do they suit S1 r33?

tm_r33 Experienced

tm_r33

Posted
  • Author
Posted

I just assumed all these q45 TB I see on ebay was dodgy after market replacements for the q45. I didnt think they was genuine. And if I use one that means I need to rewire it cause s2 plugs are different and so is the pin layout. I was hoping someone made a plug and play sort of throttle body for series 2.

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

    • The Bogan
      NC MX5

      By The Bogan · Posted

      I have more than enough digging, laying blocks, moving gravel, airrating, feeding and top soiling the grass, and setting up the veggie gardens growing some seedlings,  and then removing all the unused rock to keep me busy for the next few months at least,  hopefully the rain stops soon so I can get a few hours in this arvo, but, before that Sunday is washing day, is every body happy, you bet your life we are Nice country road day drives are a day off whenever I'm muscle sore from all the landscaping at the moment, but, more epic multiple day drives will start once the majority of the big jobs outside are completed
    • MBS206
      NC MX5

      By MBS206 · Posted

      I hear that would involve some nice country road drives into the hills for Mark...
    • MBS206
      Recommendation for engine oil funnel spill free

      By MBS206 · Posted

      I thought I'd come back and add something I JUST learned. A Toyota LandCruiser with a 1HZ, mates perfectly with a bottle of Nulon brake fluid. As in, it perfectly screws in. Great make shift funnel when you cut the bottom of it off. This may work for your Corolla.   Unfortunately, tipping a 10L drum is much harder than a 4 to 6L bottle, and they no longer include the easy pour tap which was just perfection to use previously.  
    • EndZee
      Fuel Pump Control Module & Dropping Resistor

      By EndZee · Posted

      Guys since i bought r33 gts25t coupe 1994 automatic a/t(manual swap 350z gearbox)  all i got is problems, always problems. Lets start with that when i turn key into ignition(ON) fuel pump doesnt always works. Sometimes i have to turn key twice Off/on/off/on until it primes. Its new, dw300 - 340lph. My gearbox broke so i did gearbox swap, install different intake manifold, injectors and i take pipes. Car was sitting in garage for more than half a year. I did assembly all not that long ago and when i turn ignition cant hear prime. All of sudden it stopped working. Theres many videos on YouTube how to make relay mod on r33 straight from battery so i did and it doesnt work! 😰 30 - battery positive  87 - positive from fuel pump to relay 85, 86 - one of two wires from original fuel pump wires(light blue, grey) and it didn’t work. so I check on ignition and took original BLUE relays wires from trunk, next to fuses. (I believe it’s IGN+ and ECU pin 18. it didn’t work…  tried connecting (IGN+ from og relay) and (ECU 104 from 1of4 FPCM wires) to my new relay 85/86 and it didn’t work.  I unplug FPCM. Didn’t work. im thinking what’s wrong   fuel pump is working, if I leave IGN+ on 85 and 86 straight to ground it works but it’s just nonstop. Since it getting constant 12v after key in ON. light blue wire gives me 6-8v.  so how this should be connected? What causing ECU not giving — on pin? Or I did sth wrong and that’s why it doesn’t work? I need negative signal on ECU that control fuel pump. What this should be?
    • Duncan
      M35 Brake caliper replacement

      By Duncan · Posted

      You can use your VIN to look up the factory part number somewhere like amayama, and then look to order new if necessary. https://www.amayama.com/en/genuine-catalogs/nissan Depending on price you might want to rebuild instead. @GTSBoy I had an interesting insight into US market parts when the Titan rear calipers were sticking. New calipers were dirt cheap, about 20% more than a rebuild kit....they are just considered throw away maintenance items
×
×
  • Create New...