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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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MonstaS4 Collaborator

MonstaS4

Posted
Posted

I have 2 adjustable tensioners, but no matter which way i adjusted them, i couldn't get them right. The first hole i drilled went straight into the water gallery so i drilled and tapped another further from the centre of the block. In hindsight, the first probably would have been ok with some locktite, but i didn't want to risk a water leak at the time.

I have an R33 head and the VCT gear is adjustable from behind, and i bought an adjustable exh gear. Hopefully problem solved. Well i spent a weekend dialling in the cams, so it better be solved!

Sky30, it's a 5 speed manual.

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Duncan
Duncan

Just thought I would bump this 20 year old thread because the Skid Factory have just posted up a video summarising a lot of the content, format might be more familiar for newer members

JNR24
JNR24

fyi guys, Well yesturday i picked up a RB30 for my conversion into my R33. I will be using my RB25DET head on the RB30 block. So i started stripping the motor down, pulled the crank, pistons, girdle

Cubes
Cubes

Here is all I have at the moment: http://www.geocities.com/r32_jjc/ Unless you are on broad band make sure you right click then save as. The file is around 120kb. If there is anything I have got w

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted
RB25 n/a head, GT35/40 turbo, 19-20psi

Youve got to be kidding me right ????

What specs are you running ? 270k km and 20psi with gt3540 ???

I got my rb30det which has done about 30,000km so far with a smallish turbo now I too am going the GT3540 .82 with tial 38mm gate with a top mount manifold and 740cc injectors (still off the road)

Got some questions for ya...

When does boost come on ? is it laggy ???

How does it sound ? :P

got any pics??? be very keen to find out more

Do you have .82 rear ? when do you get full boost by ???

whats you fuel economy like??

tell us abit about it..

thanks

sky30 Mentor

sky30

Posted
Posted
Youve got to be kidding me right ????

What specs are you running ?  270k km and 20psi with gt3540 ???

I got my rb30det which has done about 30,000km so far with a smallish turbo now I too am going the GT3540 .82 with tial 38mm gate with a top mount manifold and 740cc injectors (still off the road) 

Got some questions for ya...

When does boost come on ?  is it laggy ???

How does it sound ?  :)

got any pics???  be very keen to find out more

Do you have .82 rear ?  when do you get full boost by ???

whats you fuel economy like??

tell us abit about it.. 

thanks

Why would i have to be kidding???

Its .82 rear housing, makes 20psi at about 3400rpm.

lukits01 Experienced

lukits01

Posted
Posted

Can anyone help me find a set of forged pistons for RB30 that can give me a CR of 8.3:1 or more?

was looking at ARIAS but not even rocketindustries have them in stock atm, they only have the flat top piston that give 8:1 CR, any idea how this would drive?

Anyone selling these or CP, or Wiseco?

clean_vl Contributor

clean_vl

Posted
Posted

Im thinking of adapting the rb25 oil squirters to the rb30 block. Im just asking if anyone had any pics, of a rb25 block with the oil squirters removed showing the whole location. (I have looked at Cubes guide).

Or do u think I’m wasting my time trying to make them fit or is it just impossible.

SirRacer Experienced

SirRacer

Posted
Posted
It'll be in an R31, heh.

Anyway, I have an R32 RB25DE loom and RB20DET ecu on the way.

Should be able to get the RB25DE loom if necessary.

so the rb20det computer will be able to be tuned to suit the rb30 with no problems whatsoever?

i suppose the rb25de runs top feed injectors also? will this also be fine if you upgrade to gtr injectors? and i then presume a z32 afm is necessary (if not a q45)

mr_rbman Grand Master

mr_rbman

Posted
Posted
so the rb20det computer will be able to be tuned to suit the rb30 with no problems whatsoever?

i suppose the rb25de runs top feed injectors also? will this also be fine if you upgrade to gtr injectors? and i then presume a z32 afm is necessary (if not a q45)

the rb25de injectors are them same style as rb20 and rb26 injectors!

SirRacer Experienced

SirRacer

Posted
Posted
Rb25de injectors are rb20det injectors. :P

Same part number, same flow.

I ran my RB30DET in on the stock RB20DET ecu, it couldn't handle any more than approx 6-7psi as it would fuel cut.

What did you do loom wise with the conversion? I thought the extra capacity of the head may confuse the power fc

Cubes Grand Master

Cubes

Posted
Posted
What did you do loom wise with the conversion? I thought the extra capacity of the head may confuse the power fc

Cars are very simple.. The measure how much air enters the motor then puts in say 1 part fuel for every 15parts air.

As a result.. the car runs fine on the stock ecu. Obviously limited as the RB25 head flows so much more air, as a result I was hitting fuel cut.

The PowerFC handled it quit well. AFRs were pretty much spot on, light load didn't need touching. WOT required a small tweak of afr's around 3500rpm - 5000rpm. Ignition timing had to be pulled out a little due to the back pressure the stock turbo caused on the 3ltr.

After putting the VG30DET BB turbo on its taken another 6-7degree's ign. timing at wot.

lukits01 Experienced

lukits01

Posted
Posted

With regards to the higher RB30 block, how much of this affects the piping around the engine. For example, intercooler piping, exhaust manifold and dump pipe, radiator coolant piping. How much of these needs to be modified due to the higher RB30 block?

Cubes Grand Master

Cubes

Posted
Posted

My std IC piping actually fitted much better; like it was meant to be. :P

Radiator hoses are not affected.

Exhaust manifold is not affected, how can it be?! :P

Dump pipe obviously needs modification as the motor sits slightly higher. I paid $60 or something and had them cut and weld in a little spacer so to speak.

It all drops in and bolts up much easier than you would expect.

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