Stock Rb30 Bottom End

[mr-r33]

hi guys just been thinking about doing a 25/30...if i do it. it will look just like a stock 25( i here you ask way would you) will some of you know i have a GQ patrol with a RB25DET in it but off road its not the best i need more low down which the 30 will give

so will the Stock bottom end of the 30 hold up to at least 15PSI???

if i put the 25 head on it the compression will drop. how do i get it back up to 9.1? what pistions need to be used?

can you still run the oil sqirters?

do you need to fit the knock sensors in to the RB30??? if not i want to anyway...

can i use my RB25 water pump??

what oil pump

and do you think it is a good idea to fit oil ristrictors??

pics of build up would help

[JonnoHR31]

all the information you need is in this section already.

boost depends on which turbo

theres aftermarket pistons to suit 9:1 30det, have a search

dont need oil squirters

fit the knock sensors, they bolt straight up

25 oil and water pumps will be fine

you must fit some sort of restrictors, the standard 30 feeds are too big for the 25 head. the size depends on oil pump, use of the motor, what you do with vct etc

Edited October 24, 2010 by JonnoHR31

[N1GTR]

Agreed, all info is already here. Do a search please, otherwise we end up with a bunch of threads asking for the same thing

[mr-r33]

all the information you need is in this section already.

boost depends on which turbo

theres aftermarket pistons to suit 9:1 30det, have a search

dont need oil squirters

fit the knock sensors, they bolt straight up

25 oil and water pumps will be fine

you must fit some sort of restrictors, the standard 30 feeds are too big for the 25 head. the size depends on oil pump, use of the motor, what you do with vct etc

the turbo will be the stock one hiflowed or the next turbo up

oil pump i was going to use is the stock RB25 one

why not dont you need oil squirters

[mr-r33]

Agreed, all info is already here. Do a search please, otherwise we end up with a bunch of threads asking for the same thing

ok no probs will have a look

[JonnoHR31]

the turbo will be the stock one hiflowed or the next turbo up

oil pump i was going to use is the stock RB25 one

why not dont you need oil squirters

block will hold fine then at any normal boost level

stock 25 pump will work fine

oil squirters can be a good idea but they're not needed to keep a 30 alive and they're not worth the effort required to fit them, plenty of high hp 30s with no squirters around with no issues