Rb2530 Or Rb26? In An R33

[On Edge]

Hi, i have been finally joined the broken RB club.

I have been considering many options of late in regards to what motor to build or throw into my GTS-T

The car is setup for track work and once this saga is over i would very much like to see it back on the track,

My goal is to have around 300rwkw that is reliable, an leave the motors almost untouched internally

I have the ability to build a 2530 or buy an rb26, so people in the know could you please give me some opinions

and also what is required for the rb26 to work eg. sump info.

Voice your opinion

what motor should i go for???

Edited May 12, 2010 by ON EDGE

[zebra]

why not go best of both worlds and build a 2630.

[GTRsean]

2530, cheapest and most effective for the money.

Reuse your current 25 head, 30 bottom ends are cheap!

[On Edge]

why not go best of both worlds and build a 2630.

that would be ideal but at the moment its either 2530 or rb26

[Cowboy1600]

2530.

Cheaper, easier, ever reliable and 300kW should be a doodle and it should be a torque monster.

[On Edge]

interesting results so far on the poll 2530 is clearly favourite atm

[N1GTR]

Voted.

[PM-R33]

Well really you got to think. You have an RB25 in there allready (not sure how modified it is, but if it does have a lot of aftermarket parts, you can use them all), so the most cost effective and easiest conversion is the 30 bottom end.

[On Edge]

Well really you got to think. You have an RB25 in there allready (not sure how modified it is, but if it does have a lot of aftermarket parts, you can use them all), so the most cost effective and easiest conversion is the 30 bottom end.

well true your right i have the parts for a 270-300rwkw setup, but would the rb26 have a logical reason to put it in????

[zebra]

well true your right i have the parts for a 270-300rwkw setup, but would the rb26 have a logical reason to put it in????

Well if thats the case than there isnt really a need for a 26.

If the motor was bog stock than i'd suggest 26 but not if it means buying turbos, injectors etc all over again

[PM-R33]

Well really if you have heaps of parts there, the RB26 conversion would just be silly, so 30 bottom end it is.

Edited May 12, 2010 by PM-R33

[TiTAN]

expect to spend a couple thousand if you just want to drop your mods onto the 25/30 (money to cover block modification to suit RB25 head + misc modifications to make the loom/water lines etc fit. (more if you aren't doing the engine in/out work yourself)

i assume you have an R33? all the sensors/engine mounts/ballancer/water pump/oil pump etc bolt up to the block. careful using an RB25 sump make sure it doesn't have the fins that stick up below cyls 4-5 as the crank will hit them.

[R31Nismoid]

I would pose a different view...

Given SA's "regency" or whatever seems rather strict - have you thought about the legalities side?

[On Edge]

would i get away with just using an rb30 sump??

expect to spend a couple thousand if you just want to drop your mods onto the 25/30 (money to cover block modification to suit RB25 head + misc modifications to make the loom/water lines etc fit. (more if you aren't doing the engine in/out work yourself)

i assume you have an R33? all the sensors/engine mounts/ballancer/water pump/oil pump etc bolt up to the block. careful using an RB25 sump make sure it doesn't have the fins that stick up below cyls 4-5 as the crank will hit them.

[rad100]

nismoid..

this is the exact reason i didnt go rb2530 as the cops here in adelaide would send u over the pits as soon as the car rolled out the driveways which would mean that the car would have to have another rb25 dropped into it for it to pass insepction.. too much trouble IMO!

rb25 is a good engine.. just stick with that if its a streeter..

[TiTAN]

would i get away with just using an rb30 sump??

mine is currently using the RB30 sump. no issues so far.

[s2d4]

How would the fan sit with the fan shroud? Would he need to use electronic thermo fan setup?

[TiTAN]

the water pump doesnt change height. so the fan sits where it would on the 25

[gnki'vlct]

just out of curiosity......

what is the rev limit of "most" rebuilt RB30DET's?

by rebuilt, I mean stronger rods, pistons and perhaps a stronger pump, standard crank though.

[On Edge]

nismoid..

this is the exact reason i didnt go rb2530 as the cops here in adelaide would send u over the pits as soon as the car rolled out the driveways which would mean that the car would have to have another rb25 dropped into it for it to pass insepction.. too much trouble IMO!

rb25 is a good engine.. just stick with that if its a streeter..

ive buggered the bottom end, no point staying with it imo when i can upgrade, may as well while its broken. Rb30 should resemble some sort of low down torque unlike the 25.