R33 Rb30 Conversion

[nemini90]

Hey all just thought i would let you know after almost a year im going to be cranking my 30/25 build over tomorrow just a few wires to go and waiting for the tunner to come around and load in a map.

Thanks to all the guys that had imput into the guide and all the people that have answer my post fingers crossed for tomorrow

just some pics of what it now looks like

[Bliksem]

Thats a very nice looking engine bad you have there, goodluck with everything!

Just a heads up, I notice youve got a thermofan, but no shroud. I'll be doing the same, but pretty sure the shroud will be needed as the thermo only draws air through the immediate area it's placed against. I'll be mounting mine around 25mm off he radiator so the shroud acts as a funnel and the hole for the thermo fan as the exit point (for lack of a better description)

[nemini90]

i got 2 12" spal fans the other is lower and next to it there ment to be able to pull 2200 cfm each should be plenty

[r33_racer]

um we used an acl gasket.

We have a tomei one to replace it.

[Al]

Can someone recommend me a good sump to use? I was looking at the Hi Energy Pro eliminator...

Contact Leigh from "Extreme Turbo Manifolds"

Tel: (02) 4262 8774

He is currently doing mine. Had to send him my sump, oil pick-up arm, and oil pump housing. The capacity is increased to 7ltrs, the oil pick-up is relocated to ensure optimum position and is surrounded by baffles, the oil pump is modified to suck oil from the right hand side (by removing the welsh plug and inserting a fitting). I will need to block off the factory oil intake, to the pump, in the block.

His manifolds are said to be top notch too

[Godzilla33]

Question... Using Autronic SM4 in my 33 GTSt (not fitted yet). Looking at my old computer/loom, what needs to stay??? Does the std ecu have to stay connected for a/c, dash, any other ancilleries or can I just cut the loom out all together? I seem to have other wires coming from my std loom going to wiper motor (and some other little orange box back there) not to mention that wires head back from the loom towards the fuse box etc. Anyone else have any of these issues when changing computers?? Cheers for any ideas.

Surely I cant be the only person who needs this info, anyone??

[GTRgeoff]

Al

meticulous as always mate.

[r33_racer]

no you dont need the std comp for anything with the sm4, im pretty sure it can control everything you throw at it. If you havent already, go trade it in for the new plug n play version. Will save you a heap of hassle.

200 what sort of racing you going to be doing with your car to justify an aftermarket sump?

Nice build gemini90. Why did you keep the pcv valve there to the manifold? You should ditch it mate.

Nice plenum on there too, i wasnt aware hypertune made them for rb25's? If so, must have cost you a fair bit.

[[200]]

Drag racing...

[shanef]

Drag racing...

maybe look at running some form of external oil pump. caus the internals dont really like too much limiter stuff. and all the cool people run externals

[[200]]

I was looking at a dry sump setup but after reading a few threads I went back to the wet sump idea...

Its my understanding that a hi-energy sump has a few baffles and a trap door in it... Maybe drilling and putting an extra inlet coming from the head might be ok...

[CEF11E]

I have done a basic run in tune for 10psi and have everything running smoothly.

At 10 psi it makes amazing power and is all in by 2800rpm with a slide hiflow that was making full boost on the 20det at 4000 rpm and it feels fantastic to drive. bucket loads of torque and throttle response is fantastic.

I have a few annoying things to sort out.

the water temp sensor from an RB25 does not work on a 20 computer. so i have to track a 20det one down.

one of the cam seals is leaking. bugger... covers, balancer, camgears, rocker covers, timing belt off to replace it. it is just a drizzle but it has o be done.

I have also had to fabricate some bits that i will replace with original bits further down the track,

I ran out of time and had to put the engine in with the original unmodded mounts. so the bonnet would not close. I removed the bonnet heat shield and cut out small sections of reo where needed and refitted the sheilding and it now fits with 3mm washers between the hinges and bonnet.

I will get the mounts lowered 10mm later and all will be good.

she looks stock as a rock and pulls like a cut bastard! hehe

the whole thing cost me about double what i budgeted (this always happens with conversions) but really was worth it.

I am moving to VIC on the weekend and will not get to tuning till I am settled but will be aiming for 270rwkw with instant response. its still a street car and needs to be daily driven so i am not going to crazy.

[nemini90]

hey r33 racer

when i was welding the -10 fittings on the covers i was ment to weld up the hole where the pcv valve gose but i forgot

as for the plenum it is a hypertune one they dont make them for 25 yet but they will be soon

there not cheep but i think there worth the money i want to do some testing on it to see what there like against the greedy and stock items but as you would know its not a easy thing to go changing plenums

[r_speedfreak_r]

hey i know this isnt really the right place but does anyone know the number for 101 motor cafe

[r_speedfreak_r]

never mind got it cheers

[Gts-t]

quick one: can i use a rb20 cas on the rb26 head?

[Adriano]

quick one: can i use a rb20 cas on the rb26 head?

Sure can

[Gts-t]

good to know

i just picked up a rb26 head from beer baron to go with my rb30 bottom end. Im planning on using as much rb20 stuff as i can because im using the rb20 pfc

cheers

Edited October 12, 2007 by 2630GTS

[bubba]

^^ I used a 25DE head out of an R32, almost identical the the 20 in terms of layout and sensors etc. Only problem encountered was when I snapped the water temp. sensor, the 25DE item made it run in cold start all the time. Had to robbed one off an R32 RB26 manifold and it worked a treat. Car is running on the 32 gtst ecu so it should be just as easy with the 20 pfc

[S13/r32 maniac]

How do people in QLD go about having there rb25/30 legal? Im looking into building a rb25/30 for my r32. There seems to be plenty of people making big power on stock rb30's. What sort of stock pistons would you use in a rb25/30 to maintain the desirable compression ratio?