Difference between RB20 & RB25?

[elboro]

Hey,

I have an r33 gtst and want to buy an r32 gtst... i was jus wondering what the performance difference would be between a stock rb20 & rb25 for anyone that would know.

thanks, ElBoRo

[blackrb20silvia]

ummm..... bigger turbo bigger capacity more power more torque bigger injectors

those are the obvious differances

just a Q why are you trading down???

[55Nat]

practually you'r going backwards.

stock R32 vs Stock R33 = R33 win

[elboro]

haha, i am not trading down, i am buying a 32 as my second car, because i hav been doing up my 33 and i dont wanna keep putting k's on it and wearing it out, plus... i like R32's.

So your basically saying there is a big difference, is there something u can compare it to?

ElBoRo

[predator]

There's a reasonable difference in the engines (esp. stock).. but in terms of the feel and handling they're on par..

For me I traded 'down' as i wanted to completely re-setup my r33 .. that would have been stupidly expensive. Was cheaper to start again with a lighter chasis, and for me was half the price.

[TimmyC]

about 27kw's and 100kg's less. stock for stock i think 33's are only about 0.2 seconds quicker over a quater mile. Buy a 32, drop an rb25 in it and you'll never look back...

except maybe to see a few angry 33 drivers after you leave them for dead at the lights

[Roy]

Having been in a few std turbo R33s with the same mods as my R32 when it had the same mods, the R33s felt a lot quicker...that said they werent really any quicker, imagine my surprise on the straights at Eastern Creek and Wakefield when they couldnt pull away from me, well until the180km/h speed limiter:( That said maybe they would of easily left me for dead beyond 180km/h if i had my limiter disconnected, but ill never now.

So they feel way quicker, but for some strange reason the reality is they arent overly different, perhaps something to do with the power delivery etc and weights. So feel quicker and are marginally quicker, but not as much as you would think

[elboro]

kool, thanks for the feedback, i feel alot more confident in buying one now.

thanks alot, ElboRo

[blackrb20silvia]

for sure man dont get us wrong i myself live the RB20

i like the underdog i like to prove people wrong and i like upsetting people when it comes to cars

basically they are the same car but i prefer the rb20 basically its what started it all thats all i mean thats where the rb26 was platformed from

but thats just me and to be honest i dont like the look of the R33 i love 32s though but then again i loike the look of the old silvias as well

so ill stop ramblin

the best way to judge is

DRIVE ONE

DRIVE ONE

[jazza08]

rb20 - less compression, less power, less torque, more boost, more rpm. However in a lighter car... so its very similar performance except the r32 will handle slightly better.

Brakes is similar as r33 brakes are better but have more weight to stop again..

Do remember r33 parts will be newer than r32 parts aswell, so be wary of anythin on the r32 that hasnt been looked after/changed! Go the 32 all tha way!! Mind u rb25 is a better engine, so mix to two as said b4 and ull have a killa car

[CerealKiller]

The RB20 is a dog. Do what TimmyC suggested and drop a 25 into the R32...best of both worlds.

[Starionturbo]

After having a RB25DET in a R32, I cudnt be more pleased .People didnt believe it was a standard turbo and I have scared many a passenger, the jesus bar on the passenger seat didnt exist so people used to grab for the A pillar, bit annoying

The RB25 was, 1000 times smoother, 1000 times more torquier low down, cud pull outta a corner at ease in 3rd at 30 km/h and had such a strong low end to mid range, it was frightening. I enjoyed being able to torch the rears in 3rd gear on demand - mind you on a stock turbo. The thing felt like a animal due to the light weight of the 32, itd just kick you back and shut you up. I regret selling it so much , but its alrite, I Will do another one again some time down the track!!!

For now its Series II whale powwaaa!!!

[FATAZZ]

bit off topic but wot about the rb26det(single turbo)????ive heard of it,does it exist????

im new to cars so im sticking with the rb20 for now as its cheap to replace.

my 2cents

[Gts-t]

The r32 has a better power v weight ratio than the r33

the RB20 makes more power per liter stock.

[Roy]

When the revolution comes anyone who has bolted an RB25 into an R32 will be the first to be lined up against the wall:)

But seriously all emotion aside, my thoughts...

Im all for putting an RB25 in the R32, but i dont see the point of ppl spending all their budget on putting a std motor in just to get 200rwkws, when they could get a HKS 2835 setup and make average power around 215-220 rwkws. Hell i think my average power is around 208rwkws:) Aint no std RB25 going to make that sort of average power let alone peak power.

However if you plan on putting a bigger turbo on the RB25, and having a play then i see the merit, but then i look at the dollars and you can have a std RB26 make 250rwkws pretty easily using std turbos, and reliably. There are pros and cons for both sides...its a matter of what you are after, if thats low down grunt then you will never like the RB20:)

Me i like old school turbo delivery, at 3,500 my thing comes on hard and is mega fun with 235rwkws, sounds great, goes good enough for 113mph 1/4 passes with 15psi, and i like the fact that i can drive around off boost quietly with little attention being drawn to me as my filter, turbo, BOV arent whistling their heads off at light throttle loads and rpm.

LOL..the thing has done something like 7 to 8 circuit/drag/drift days plus 3,000 road kms since Feb and still going strong.

Biggest problem with the R32 seems to be the gearbox...but throw a 2835 on an RB25 and you have what would be close to motoring nirvana:)

[R32Big_boy]

*Waits for sandown to drive your car*

After driving troys car a few months ago i was seriously considering keeping the RB20 and going with a larger turbo setup, its still a possiblity mind you. I would have to put an rb25 gear box on as toy said. But then again i want the massive torque and power from an rb30det. I'm torn between massive torque and low rpm, or a decent power output and a high revving screama.

[Starionturbo]

People who have done the conversion understand what a huge step up a RB25 is from a RB20DET. I rmember going in MODDED RB20s and I cud make a cup of tea before it hit power, and then when it did it wud uselessly wheel spin. That was just shit. I liked a smooth linear power hit right from down low, this is where the RB25 delievered, true maybe 200 kw - but thats more torque than the little 2 liter makes! and In the lighter 32, off the line and on the run, it was hard to beat. My car didnt have any annoying suction noise either, used to cruise around quite comfortable, more fuel effieciently too.

You can put a big turbo on anything and be fast - hell put something like a GT30R and watch a stock internal RB25 happily pull 300 rwkw more comfortably than a RB20 wud, plus with that sized turbo on a 20, i could not only have a cup of tea, but a piece of cake too, before it came on boost and when it did, it wud wheelspin and be useless.

In my opinion, I wud never regret doing this conversion - In fact, I hope to again in the future do this and build a more powerful street car. I enjoyed it so much, I cant stress how good it felt, If it werent for the cruel police here, Id still have my old beast!

heres a Pic before I sold it, very sad day for me

[Roy]

People who have done the conversion understand what a huge step up a RB25 is from a RB20DET. I rmember going in MODDED RB20s and I cud make a cup of tea before it hit power, and then when it did it wud uselessly wheel spin. That was just shit. I liked a smooth linear power hit right from down low, this is where the RB25 delievered, true maybe 200 kw - but thats more torque than the little 2 liter makes! and In the lighter 32, off the line and on the run, it was hard to beat. My car didnt have any annoying suction noise either, used to cruise around quite comfortable, more fuel effieciently too.  

You can put a big turbo on anything and be fast - hell put something like a GT30R and watch a stock internal RB25 happily pull 300 rwkw more comfortably than a RB20 wud, plus with that sized turbo on a 20, i could not only have a cup of tea, but a piece of cake too, before it came on boost and when it did, it wud wheelspin and be useless.

In my opinion, I wud never regret doing this conversion - In fact, I hope to again in the future do this and build a more powerful street car. I enjoyed it so much, I cant stress how good it felt, If it werent for the cruel police here, Id still have my old beast!

heres a Pic before I sold it, very sad day for me

Like i said, not saying its a bad thing or a waste of time, but if bolting in the RB25 is the only thing you are ever going to do, then id say mod the RB20 with that money. And admittedly my thing takes a bit of coaxing in 1st and 2nd gear but in 3rd and 4th i have 18psi before 4,000rpm (more like 4150-4,200rpm in 2ndgear) and my think doesnt light up the tyres in 2nd gear. The only time it does is if you have crap on the tyres from driving over a dirty patch of road or they are bald like they are now.

So not arguing, and the RB25 is obviously the better canvas, no doubt, but ppl dont even seem to be aware that RB20s are good for a bit of fun, and run off and spend their money on an RB25 when they may have been happy with just a turbo upgrade. Anyway im just putting forward an alternate side of the story...which never sees the light of day:)

[Roy]

... I enjoyed being able to torch the rears in 3rd gear on demand - mind you on a stock turbo. The thing felt like a animal due to the light weight of the 32, itd just kick you back and shut you up...

LOL..i cant torch 2nd gear let alone 3rd, what were you saying about power delivery:)

[Cubes]

I've driven an RB25DET making around 180rwkw. To be honest it felt slower than my rb20det making 164rwkw.

It didn't have that revy/snappy feeling and appeared not to have the keep on reving feel.

Now I have the rb30det making close to 180rwkw in the R32 it definitely has that rev snappy feeling, just at a lower rpm that all.

It must be a combination of the r32's lighter weight, lower diff ratio, slightly short gearbox ratio's andthe R33 having vct that may smooth out the power delivery. The r33 to me wasn't really 'fun' to drive.

I jumped back in to my r32 and had a smile on my face thinking thank god.

Sure the off boost torque of the rb25 was nice but the overall package didn't have that racey feel. Must just be the R32's, fun to drive.