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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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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

MonstaS4 Collaborator

MonstaS4

Posted
Posted

Just had the VL on the dyno and thought i'd post my results. A bit of background......

Stock RB30 block

Stock R33 RB25DE head, VCT hooked up.

R33 RB25DE oil pump

GT3040, 0.82 rear

RB20DET ex. manifold

550cc mazda 20B injectors

600x300 cooler

Bosch 044 pump

258rwkw on 13psi

800ish Nm (can't remember exactly)

Don't have a dyno printout ATM as the dyno keyboard shat itself, but he saved it and i should see it sometime this week.

MonstaS4 Collaborator

MonstaS4

Posted
Posted

I honestly didn't pay to much attention to the RPM/power relationship while it was on the dyno. My eyes were glued to the power figure! Like i said, the graph wasn't able to be printed at the time, so i'll have to wait till he e-mails it through.

Wastegate is an external 48mm progate mounted on a custom adapter between manifold and turbo.

ECU is a Haltech E11v2 with a 2 bar MAP sensor. The boost cut is set at 2 bar absolute (obviously) and even though the wastegate solenoid is set to provide 13psi, it occasionally spikes and hits the boost cut. Hopefully closed loop control will sort this out.

Jago Mentor

Jago

Posted
Posted

quick question guys.

If i were to do the RB30 upgrade on my RB20 equipped R31, would i be able to use the microtech i already have in it on the RB30? Also, would everything else wire up as is? or will i have to go through a huge auto electrical drama?

Also, what would redline be if you get the RB30 crank propperly prepped and balanced?

sky30 Mentor

sky30

Posted
Posted
quick question guys.

If i were to do the RB30 upgrade on my RB20 equipped R31, would i be able to use the microtech i already have in it on the RB30? Also, would everything else wire up as is? or will i have to go through a huge auto electrical drama?

Also, what would redline be if you get the RB30 crank propperly prepped and balanced?

Im using a microtech with the stock RB20det loom, no problems, just use the stock RB20 sensors.

conan7772 Mentor

conan7772

Posted
Posted (edited)

Hey,

Just got the power tune done and very happy with the results.

The car is so responsive it's not funny and I _______ mean it !

We're all quite surprised with the power output and especially the turbo.

Having the high-flowed stock turbo was always questionable, but even more than before the conversion, it spools up so quick and holds 18 psi efficiently.

I've been considering a GT35/40 onto the stock manifold but I'm now reluctant to change anything given the instant boost.

The accelleration is just exhilarating and I _______ mean it !

Tuned to 15 psi due to stock injectors we got 294 rwkw / 508 fwhp.

Next service, will go for Sard 550's and push the turbo as hard as possible.

Nengun will deliver for $674.00 !, bugger high flowed injectors..

Dyno graph posted in the RB30 results.

God bless Nissan and everyone who's been part of this conversion.

post-25026-1144206895.jpg

Edited by conan7772
Cubes Grand Master

Cubes

Posted
Posted

15psi = 294rwkw yet with 3250rpm full spool?

Almost sounds too good to be true, if thats really the case stick with it as a GT35R will be laggier and will require more boost to make that power.

What fuel are you running?

Turbo specs?

What fuel pressure are you running? :O

Craved Grand Master

Craved

Posted
Posted

could be running bigger cams to help bring down the boost level, dont really know specs of the engine..

im getting 294 rwkw with teh std RB25 @ 18psi, but with tomei pon cams..

maybe some more details on the motor will help make that tune results make more sense.

sky30 Mentor

sky30

Posted
Posted
could be running bigger cams to help bring down the boost level, dont really know specs of the engine..

im getting 294 rwkw with teh std RB25 @ 18psi, but with tomei pon cams..

maybe some more details on the motor will help make that tune results make more sense.

Thats good power also.

What spec cams, and what other parts on your motor (aftermarket plenum, exh manifold, etc?)

Craved Grand Master

Craved

Posted
Posted
Thats good power also.

What spec cams, and what other parts on your motor (aftermarket plenum, exh manifold, etc?)

plazma man plenum, custom highmount setup, HKS GT3040 1.12 rear housing. tomei pon cams 256 /8.5 power FC and 550cc sards, sard 1:1 fpr, Z32 afm

laggy now, but will be better suited once the rb30det is completed. full boost of 18psi at 4700rpm.

Bl4cK32 Grand Master

Bl4cK32

Posted
Posted
plazma man plenum, custom highmount setup, HKS GT3040 1.12 rear housing. tomei pon cams 256 /8.5 power FC and 550cc sards, sard 1:1 fpr, Z32 afm

laggy now, but will be better suited once the rb30det is completed. full boost of 18psi at 4700rpm.

wheres the std rb25??

what did you mean by? -

im getting 294 rwkw with teh std RB25 @ 18psi, but with tomei pon cams..
Craved Grand Master

Craved

Posted
Posted (edited)
wheres the std rb25??

what did you mean by? -

std bottom end was what i refering to...

main thing was with Sky30's post refering to his 35/40 cracking 300kw @ 18-19 psi... and thats a rb30det.

there are things that can help reduce the psi required for certain power levels..

Edited by Craved
GTR-Ben Proficient

GTR-Ben

Posted
Posted
std bottom end was what i refering to...

main thing was with Sky30's post refering to his 35/40 cracking 300kw @ 18-19 psi... and thats a rb30det.

there are things that can help reduce the psi required for certain power levels..

Read again mate..

"Having the high-flowed stock turbo was always questionable, but even more than before the conversion, it spools up so quick and holds 18 psi efficiently"

He said he got 300kw at 18psi on the high-flowed stock turbo ...

conan7772 Mentor

conan7772

Posted
Posted
Stock hi-flow making near 300rwkw on 15psi............. are you sure?

My 35/40 only cracked 300rwkw on 18-19psi.

It looks like stock housings to me.

The dealer I bought it from said it was a T3/T4 Hybrid.

I don't know for sure. See pics...

It was bored out to the max on the compressor housing. Bugger all meat left on the intake.

Also, before I blew up the RB25DET with this turbo, it had 247 kw.

That dyno graph is also posted.

post-25026-1144315643.jpg

post-25026-1144315696.jpg

post-25026-1144315741.jpg

post-25026-1144315833.jpg

conan7772 Mentor

conan7772

Posted
Posted
Read again mate..

"Having the high-flowed stock turbo was always questionable, but even more than before the conversion, it spools up so quick and holds 18 psi efficiently"

He said he got 300kw at 18psi on the high-flowed stock turbo ...

No

294 kw at 15.2 psi

Power graph and pressure graph was the same test

sky30 Mentor

sky30

Posted
Posted
It looks like stock housings to me.

The dealer I bought it from said it was a T3/T4 Hybrid.

I don't know for sure. See pics...

It was bored out to the max on the compressor housing. Bugger all meat left on the intake.

Also, before I blew up the RB25DET with this turbo, it had 247 kw.

That dyno graph is also posted.

Yeah, that looks very similar to the hi-flow i had on mine, but i only made 235rkw on 17psi with similar mods.

Have you had yours on a dynodynamics dyno?, be interesting to see the difference compared to the dyno you used.

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