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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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  • 1 month later...
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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

Posted Images

Rolls Grand Master

Rolls

Posted
Posted (edited)

Hi guys, is it possible to run a rb2530 (det head) with a nistune?

Just pick the nistune based on the head you are using, or you might have to chop and change sensors and looms. However R33s don't have nistunes, so you would need an rb20det computer or z32 to run it. Pretty straightforward to setup, email nistune themselves and see what board they recommend you.

Edited by Rolls
On Edge Veteran

On Edge

Posted
Posted

Just pick the nistune based on the head you are using, or you might have to chop and change sensors and looms. However R33s don't have nistunes, so you would need an rb20det computer or z32 to run it. Pretty straightforward to setup, email nistune themselves and see what board they recommend you.

I have the z32 ecu so that'll work? If so I will speak with Pete from nistune for more details.

Thanks for your help guys

  • 1 month later...
kitty Apprentice

kitty

Posted
Posted

I need some clarification after weeks of reading different info if anyone can help

Im planing on doing the rb30 conversion using the rb25det neo head.

Can anyone confirm the cc's of the turbo neo head, Ive read anywhere from 52cc to 60cc ?

Also im running an auto tranny and it shifts at 6800rpm (I cant change shift points) from what I have read standard rb30 rods dont like to be reved over 6500 without letting go. Is this correct?

Do I need to get the crank balenced to rev to 6800rpm?

I hope someone can enlighten me.

Thanks

Gerg_R31 Mentor

Gerg_R31

Posted
Posted

Balance your crank rods flywheel and pressure plate to prevent unwanted vibrations at high revs that will cause problems

Neo 25 heads i have seen here at the machine shop i work at vary from 52-55cc's

non neo 25 & 26 heads I've seen vary from 63-66cc's

BMYHOE Proficient

BMYHOE

Posted
Posted

Did you get your 25/30 back together? How'd it go?

yeah i got it a JEM at the moment gettin a E85 tune.. should get it back within the next week.. ill come past your work and show you man..

hows your car been going?

Gerg_R31 Mentor

Gerg_R31

Posted
Posted

yeah i got it a JEM at the moment gettin a E85 tune.. should get it back within the next week.. ill come past your work and show you man..

hows your car been going?

awesome, i think my 26/30 is killing the non syncro rb20/30 gearbox, will upgrade to the rb25 in the new year, just hope it can last

  • 3 months later...
ShiftyTys Rising Star

ShiftyTys

Posted
Posted

Power porting the compressor and turbine covers is not something I have ever considered. I have done cast iron exhaust manifolds, works very well. I have not experienced any restriction in an RB25DET inlet manifold or throttle body up to 525 bhp so I doubt that it would be worth the cost. Over that, an RB26 top end with inlet manifold is a cheaper proposition when you add it all up. If you are intending to use the GT35R to its potential, then that would be my suggestion.

Hope that helps:cheers:

Hi.

What kind of flow gains did u get power porting the standard rb25 ex manifold? Thanks

  • 2 months later...
sriver killer Proficient

sriver killer

Posted
Posted

Ive finally got my head off time to drill and tap into the head for external oil feed.

first question Ive been trying to find a way to find all attached images within this thread.

looking at what people have done in the past for vct feed.

Also. Is there a particular spot alont the vct feed gallery where there is alot of meat to tap into.

Someone had suggested building up the alloy on the head before drilling and tapping. Whether its necessary or not I would rather find out before I pick a spot to start drilling into.

HR31-PASSAGE Veteran

HR31-PASSAGE

Posted
Posted

Ive finally got my head off time to drill and tap into the head for external oil feed.

first question Ive been trying to find a way to find all attached images within this thread.

looking at what people have done in the past for vct feed.

Also. Is there a particular spot alont the vct feed gallery where there is alot of meat to tap into.

Someone had suggested building up the alloy on the head before drilling and tapping. Whether its necessary or not I would rather find out before I pick a spot to start drilling into.

this is what i done>

photo4-1.jpg

photo1-6.jpg

photo2-6.jpg

photo3-4.jpg

sriver killer Proficient

sriver killer

Posted
Posted

this is what i done>

photo4-1.jpg

photo1-6.jpg

photo2-6.jpg

photo3-4.jpg

hey thanks for the nice shots, that second shot where you have drilled into it you wouldn;t be able to send me a high resolution copy at all would you?

looks like quite a large line what size thread is that tapped? I was looking at tapping to suit a 3/8 NPT bung.

From the shots I'm guessing that particular area has a wall of 4mm would that sound about right?

  • 2 weeks later...

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