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R33 Rb30 Conversion

JNR24

By JNR24,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

Posted
Posted

Regardless more than 7.5k and u really should be running an aftermarket balancer.

So its either you go all out or you don't.

Standard rods resized with new bolts.

Price up what you want done to the std rods and then compare the price to spool import forged rods and you will see why its useless spending $$ on the stock rods.

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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

bubbabooga Rising Star

bubbabooga

Posted
Posted

has any one tried their luck with grabbing their series 2 motor from a wreckers then slappping the head on with new head gasket>?

like not touching the rings or bearings in the bottom end???

Redliner007 Enthusiast

Redliner007

Posted
Posted
has any one tried their luck with grabbing their series 2 motor from a wreckers then slappping the head on with new head gasket>?

like not touching the rings or bearings in the bottom end???

I know a couple of guys who have whacked together something rough and cheap, seems to be working fine for them pushing decent power? You looking into doing it yourself?

bubbabooga Rising Star

bubbabooga

Posted
Posted

its just an idea at this stage as my motor seems rather heallthy...

the factory hone marks are still looking good.

i was thinking of putting rb30et oil pump and that being the only real change to the bottom end..

will be chucking in head oil restrictors also...

im havingtrouble finding any place tha can suply the tomei press fit oil restrictors...

what kinda of power figures are your mates cars running???

im running a hks T04e turbo.. i cant imagine it flowing enough to get anything over 270rwkw..

ill be happy to get over 200 at the wheels..

i have just brought dahtone racing (from this forum) head from his 32 which has been ported and running gtr valve springs..

all i would be buying would be genuin head gasket a idler and a genuine water pump and thermostat....

bubbabooga Rising Star

bubbabooga

Posted
Posted

oh reallly..... maybe not such a good idea with the restrictors aswell as the 30et pump??

wat pump would you suggest going with...

my other thought was a rb25det pump....

was not sure if you needed the crank collar if you went with the series one oil pump???

cheeeers

Redliner007 Enthusiast

Redliner007

Posted
Posted (edited)
oh reallly..... maybe not such a good idea with the restrictors aswell as the 30et pump??

wat pump would you suggest going with...

my other thought was a rb25det pump....

was not sure if you needed the crank collar if you went with the series one oil pump???

cheeeers

yeh i would suggest the rb25det oil pump few of the guys suggested that to me also. you should get 200 at the wheels easy just whacking it together, some guys on the forums are talking fairly big numbers, but even saying that iv been told the factory bottom end can hold upto 500hp.

I saying that say you spend 1g max putting the 30 together on a very cheap its not gonna hurt as much as spending 5-6k and blowing it up right?

you should use a thicker gasket maybe?just an idea but im planning on using a multi layer rb26dett.

Im planning on using restricters with the 25det oil pump? Is this right/wrong?

Edited by Redliner007
GTRgeoff Grand Master

GTRgeoff

Posted
Posted

Why not to use an RB30 oil pump... well it's just a bit skinny. Restrictors will be good with the 25/26 pump. Don't need to drop the CR at all so just use a single factory 25 head gasket. The collar is a damn good idea, and Nissan eventually made it standard across all RBs I know of after the 33GTSt and later model GTR32s to give a wider oil pump drive.

post-6392-1217987830_thumb.jpg

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r33_racer Grand Master

r33_racer

Posted
Posted

thanks for the offer geoff....but dad ended up getting a whole 26 head the other week anyway. So i need to change that sig now lol...Even so, we wouldnt have needed the idle control anyway...race car we just do it manually...one less valve, less weight and clutter :thumbsup:

bubbabooga Rising Star

bubbabooga

Posted
Posted

what about leaving the stock rb30 oil pump and not running any restrictors or anything????

i planned on just using a stock nissan rb30 head gasket...

its my understanding that to fit the crank collar the crank has to be removed from the block and fitted professionally, is this correct????

cheeers

ps just ordered my dayco timing belt threw repco, cost me $60 cuz they had to order it..

what has anyone paid for a genuine rb25 idler???

bubbabooga Rising Star

bubbabooga

Posted
Posted

haha yep ripco for sure ay...

spewing. as their is also a sprints in my town too...

oh well repco is just a pushy ride away and already paid for...

where abouts can ya purchase the head oil restritors??

yeoooowww

bubbabooga Rising Star

bubbabooga

Posted
Posted

what about leaving the stock rb30 oil pump and not running any restrictors or anything????

its my understanding that to fit the crank collar the crank has to be removed from the block and fitted professionally, is this correct????

anyone got a spare rb25 idler sitting around??

haha

Cubes Grand Master

Cubes

Posted
Posted

I would presume the stock rb30 pump should be ok with stock restrictors.

I remember some one on ct.com had issues with pressure bleeding off on idle with the rb30e pump. Unsure if it was a stuffed bottom end, pump etc.

Wouldn't use an idler. Use 2 x tensioners.

bubbabooga Rising Star

bubbabooga

Posted
Posted

oh okay rekon i go with two tensioners.... its best to determen where to drill the hole for the second one after you have your timing belt?

so to get the right tension kinda thing??

salesman and a half you are dahtone.. haha im already in debt to ya..

does crank need to be removed to fit the crank collar??

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