Rb25de

[NISMØ]

Hey has anyone actually put a Greddy or Greddy copy plenum on there R33 RB25DE Head ? Ive heard so much talk and seen so many ppl who say they gonna do it but has anyone actually done it and seen results?

[SKiT_R31]

Ask me in a week when i get my microtech on. But a Greddy rally wouldnt be the best choice, somthing like a JUN style (with the bellmouths) would be better, as the runner lengths are identicle, its like haveing Trumpeted ITB's at WOT

[NISMØ]

Ha never thought of that, Ill hit you up in a week. any engine bay pics? , sounds pretty sexual .

[SKiT_R31]

Ha never thought of that, Ill hit you up in a week. any engine bay pics? , sounds pretty sexual .

Will do after the weekend. I would have gone the Jun route, but i had a Greddy style and nothing to do with it (was initially for an S13 with an RB30DET, as the stock plenum didnt clear the bonnet, but went R32 head instead).

Mine was <$500 for the plenum and 80mm billet TB, almost half what the JUN style inc TB's cost, not sure how much performance difference there would be, but the JUN is definately more ideally suited for N/A due to the bellmouth's, longer and identical length intake runners.

I had a look on a plenum calculator, and for peak volumetric efficiency at 6000rpm i need 12" intake runners with a 2" diameter - somthing ill make at somepoint, until then the greddy should keep me happy. Mainly wanted it for the larger TB, and to get the intake away from the hotside of the engine, as well as the benefit from a much shorter intake pipe to CAI. Not sure what it will do for VE gain, as i think the runners may be too short, time will tell .

ECU is microtech LT12S, GTR loom, 550cc injectors (low duty cycle for better efficiency taking advantage of the sequential injection) fujitsumoto jasma tuned length extractors, 3" mandrel exhaust (1 centre offset mandrel glass packed perforated muffler, straight through resonator, no cat) 1.5mm gap 7 heat range plugs, upgraded coilpacks, 255, 8.3deg cams & >11.5:1 compression ratio.

once its together, should be quite angry. Had this in the works for a while, but i got distracted with yet another car (30e+t) made some big numbers with it, got bored, its done now so i'm back to my N/A ways on this old project.

[kb-r33]

ahah i havent seen one yet but keen on seeing someone do it!

[NISMØ]

updates..?

[SKiT_R31]

ugh, no sorry, hit a few speed bumps with the wiring and electronics, hoping to atleast get it started this weekend. I'm in tas so its cold wet and dark atm, sort of dampers motivation...

[NISMØ]

bump

[SKiT_R31]

hah sorry i never got back to you, the car starts and idles but doesnt run properly, it badly need a tune, so its been sitting there while i sort out the last few bits to put on it and wait till i can get it tuned .