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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

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Fitzpatrick Speed Works Mentor

Fitzpatrick Speed Works

Posted
Posted

pete cheapest is acl replacement bearings from your local repco etc.

Standar nissan bottom end bearings is $189+TAX, Holden I think was more again.

ACL standard replacement Ie. non race series. $96+TAX

Dave, Good work mate thats really nice for only 10psi, run her in quick so we can see what is really achievable!!!

Skyrine-Dave Mentor

Skyrine-Dave

Posted
Posted

GTST:

Wiseo forgies

eagle rods

2mm cometec (sp?) head gasket

stock rb25det head

greddy plenum

custom high mount with GT35r, .82 AR rear

I am told it has 9:1 compression

Notice on the graph how early it wants to shoot up in boost.. and in power!!

it is a world apart from the rb20, its just so nice to drive normally, Only booted it a few time but hell!!! its crazy

Skyrine-Dave Mentor

Skyrine-Dave

Posted
Posted

she's got a non name 45mm external that really screams on boost :P

I havent wired my tacho in yet, but yeah it wouldnt be the most accurate figure cuz its is running pretty fat at the moment, seems to choke on itself a little, then all of a sudden it just screams onto boost

My speedo isnt working yet either, its cable driven and the drives in the box, but nothing on the dash ?? :S, going to jack it up and pull out the speedo sender, bet it's snapped the cog off the drive :)

StockyMcStock Proficient

StockyMcStock

Posted
Posted

what happened to the R31 you had dave?

jeez seems like ages ago when we were talking about this stuff in the porto over a *number* of alcoholic beverages. good to see you got it going, only beat me by 6 months though :(

impressive power for that boost too, nice bolt-ons contribute i think :(

Sydneykid Grand Master

Sydneykid

Posted
Posted
Thread too long to check, but I understand RB30 stock rods are tougher than RB25 rods?  By how much and why?  I hear they can handle ~400rwkW with all tuning working well.

Ho, ho, ho, standard rods :looney: :looney: :looney: 400rwkw ho, ho, ho

RB30 rods are longer

RB30's have a better rod/stroke ratio than RB25/26

This means they are subject to lower side stresses

Being 3 litres, it doesn't have to rev as hard to make the same power

So the RB30 will generate the same power with less rod loadings

But the RB30 rods in themselves are not as strong as RB25 or RB26 rods

Because they don't have to be

:P

Freebaggin Proficient

Freebaggin

Posted
Posted
Ho, ho, ho, standard rods  :looney:  :looney:  :looney: 400rwkw ho, ho, ho

RB30 rods are longer

RB30's have a better rod/stroke ratio than RB25/26

This means they are subject to lower side stresses

Being 3 litres, it doesn't have to rev as hard to make the same power

So the RB30 will generate the same power with less rod loadings

But the RB30 rods in themselves are not as strong as RB25 or RB26 rods

Because they don't have to be

:P

Yep, makes sense.

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