25/32

[skidmark]

the time has come to realy think about my performance mods on my r32

i was going to stick with the RB20DET but i think it would be

much easyer to extract the power i whant from the RB25DET

so my questions are as follows.

do the rb25 gearbox mounts line up

do i just unplug the r32 ecu and plug in the r33 ecu

or do i have to rewire the whole car

and most importantly

do i have to go through reagency

mel i know you have the rb25 in your 32 so what can you tell me

what other pitfals may i come across

dose any one know any one who can help me with this project

i have herd of some one who ran the rb25 with the rb 20 ecu

but i dont think it ran verry well over heating and such

any help would be much apreciated

[Ronin]

I can answer one of your questions

do i have to go through reagency

Yes, yes you will and a fun experience will be had by all.

[skidmark]

aaaahhhhhh nooooooo

[MattR]

Skidmark give me a buzz or pm, ill be able to help:) Ive got some stuff to get you started if thats what you want to do. hope this helps Matt Regency shouldnt be a problem if you have made sure all is done properly. Or just put the rb20 engine cover on the rb25 and not many people will be able to tell the differance

[skidmark]

i cant give you a buzz coz i dont know your ph #

so look out for a pm

[MattR]

yeah sent you one back with number.

[skidmark]

matt

i was reading a diferent thread about putting a rb25 in a r32gts4

they had trouble with the sump clearing the cross member

is this the same with the GTST

i have also had a couple of people tell me to leave the rb20 in it

because you can get more top end power out of the rb20

than you can get out of the rb25

what do you guys think do you think this is crap

i do because even if you did get that power out of the rb20

it would be unstreetable

input please :boobies2:

[Steve]

you can get more top end power out of the rb20

than you can get out of the rb25 .....

Did you ask them where/when/how? It would be interesting.

That extra 0.5L will give you a bit more torque off boost and bring a turbo onto boost a bit quicker. From what I have seen RB20 and 25 can make similar power (peak) with similar mods, just the RB20 needs a few more revs to do it. But you can never deny that cubes do make a difference, that would be like saying turbos dont make a difference or revs dont make a difference, of course they make a difference - everything else being equal.

The other side is, if you blow up an RB20, they are a very cheap engine to replace, and with a 2530 hanging off them.....killer. Alot less hassels, with registration (just inform regency of the engine swap), changeover cost, resale. You can buy a 2530 new with all the bits to fit it (bolts, adaptors, oil and water lines, etc), for 3K.

[skidmark]

thanx steve

ill defanetly keep that in mind

i have hered the rb 20 is also a little bit stronger is this true

[Clint32]

Its simple how much HP do you wont, how quick do you wont to go down the qtr? Figure this out or set a $$limit then your questions can be answered.

[Steve]

skidmark, dont know about the RB20 being stronger, it does have a lower CR, which helps it handle more boost. I am making over 300rwkw with an rb25, stock internals - its strong enough for me:)

If you have the dollars (around 4.5K) just buy a RIPS 3L engine, with sump already adapted. His GTS4 is running 10s with this engine, certainly scare a few GTRs:p

[skidmark]

im not going to race aor drift my car i just whan a car thats fun to drive

with around 250rwkw and im trying to work out the best option for a good fun ride

thanx guys

[EnricoPalazzo]

mate if u only want 250rwkws, then keep the rb20. The price to put a rb25 in ur car then get 250rwkws will prolly cost double to that of just slappin on a decent turbo onto the rb20.

theres a good chart going around which allows u to choose a turbo for a hp level. Being a rb20, u want a good turbo like hks that can spool up quicker then others. For 250rwkws, somethin like a 2835 would maybe be ideal.

[skidmark]

thanx Enrico i think i might keep the 20 motor now

i was thinking about resale vale and all today any way

i was gonig to go for a 2530 turbo or do you think this would be to small for

250rwkw

[VIPERGTSR01]

yeah i think the 2530 is abit too small for 250rwkw, better off with the 2835

[EnricoPalazzo]

unfortunalty the 2530 will puff short of 250rwkws. however as steve already mentioned, due to the rb20 having a lower CR, the engine wont mind some more boost over 1bar, and hks turbos are really efficeint still after 1 bar, so it may get really close thou.

The 2835 will get u over that mark, but it will be a lot more laggyier then the 2530, and being a rb20, u will feel it alot.

Perhaps speak to a few about a 2540, a bit laggier then the 2530, but should also be a trade off over the 2835. Otherwise choose a 2530, and do other mods that may help u get there, like adding toluene sometimes when u want to use all the power.

[skidmark]

how many kwats are they rated at the 2835 i mean

[EnricoPalazzo]

ill check.

[skidmark]

tar

[skidmark]

wheres the best place in adelaide to pick up a hks turbo

for some one who will match me up with what i need