R33 Greddy Plenum On R34

[sleek_s13]

hey all, ive searched and searched the forums and just have a few questions about fitting a r33 greddy plenum to a r34 gtt with neo engine.

so i bought the r33 greddy plenum, r33 throttle body adapter, r33 hks fuel rail, and will buy r33 injectors.

few things i want to know:

So i can only use a r33 s2 or s1 throttle body? or can i use a bigger aftermarket one? if i choose the aftermarket one will i have to weld a new flange onto my plenum?

What TPS i will have to use

What wiring i will have to alter or remove to get this to work

What do i have to do to make the injectors fit? just use smaller (or bigger?) O rings for the injectors?

any other hints and tips anyone know please let me know, the info will be very very appreciated.

thanks

[R31Nismoid]

There is a thread covering it somewhere... Can't remember the end result but it's a fiar bit of dicking around IIRC.

Have a search (i dont have time to do it for you ATM).

[mawzy]

Yeah it's quite a bitta work. need adaptor plate for aac valve. use as much of your standard wiring as you can. I used neo injectors with diffrent orings to fit and spaced the rail up, then at the end the day was useless with the factory ecu having a big meltdown. Couldn't get the idle stable, and was down heaps on power, and just didn't enjoy running in general. Put back to factory and runs fine again. Unless you have a piggyback or replacement ecu, I'd wait to do this mod.

[GUN_METAL_GTR32]

dude, seriously by the time u have gotten the r33 greddy plenum and done all the f**king around and shit with it u would have been able to buy a plazmamn plenum which a perfect straight fit,

and they look way better.

[.WILKO.]

dude, seriously by the time u have gotten the r33 greddy plenum and done all the f**king around and shit with it u would have been able to buy a plazmamn plenum which a perfect straight fit,

and they look way better.

+1 i went with plazmaman great bit of gear

[Mr. Untouchable]

+ 1 for plazmaman

[sleek_s13]

i already looked at the plazmaman one for quite a while but decided against it, trying to tidy up the engine bay make everything a bit more accessible. but ive already ordered the greddy so no point talking about different ones. just want to know whats involved with fitting it.

cheers

[mawzy]

Pays to have it resurfaced, and also pressure tested. you can get away without doing this but at the end the day ifit leaks, you gotta pull it apart. New gasket. Adaptor plate for aac valve, not hard to make your own, or you'll need to get one made. An adaptor for your throttlebody. Think the r33 adaptor will work, but unsure as I made my own hereaswell. If you use you factory injectors and rail. Slot the mounting holes, and make apropriate spacers for the rail. U'll need from memory new oring 7.5mm inner diameter, 15-16mm outer diameter, can't remember exactly, to fit the intake. New vacuum lines to plumb it all up, aswell as brake booster and water lines. And you'll need to get creative on where you plumb all the water lines, as there's 3 in the aac valve, but you don't have 3 to connect to. I never got mine sorted, ie that the flow was going correctly. I knew it was running hotter than normal, because the electric fans were coming on more and they're set of a 85 degree thermo switch. make new intercooler pipework to suit new intake. Then after all sed and done it won't run on a factory ecu. My understanding is that the volume of air inside the plenum is whats throwing the tune outta whack. big flat spot from 3k onwards, probly a loss on 1/3 power. So unless you plan to, chip n tune, nistune, or some other ecu, you will be sorely disapointed when you take for first run.

[sleek_s13]

thanks heaps for that, very helpful, probably should of stated in my first post that i have power FC already and will be running r33 fuel rail and injectors.

[ff_driftz]

i am trying to fit one now to my r 34 have fitted it with a r 33 acc valve but it is hunting badley, i have a aftermarket ecu and it ran without any problems before,

Is my problem in the r33 acc valve?