Rb20 Det

[Luke88]

I just bought a 32 Skyline and i Want to do a 25 conversion. But in the mean time i want to know what sought of power i can get out of the 20 whilst staying fairly reliable. I have a computer, injectors and a few other bits and pieces to put on it but i dont want to blow it up because i cant afford a new engine atm. I've heard rb20's arent a very good engine any other oppinions would be good??? Thanks.

[rad100]

i run 211.6 at 17psi!

read the rb20 upgrade thread up the top of forced induction! good info!

[Mark_McQ]

  Luke88 said:

I just bought a 32 Skyline and i Want to do a 25 conversion. But in the mean time i want to know what sought of power i can get out of the 20 whilst staying fairly reliable. I have a computer, injectors and a few other bits and pieces to put on it but i dont want to blow it up because i cant afford a new engine atm. I've heard rb20's arent a very good engine any other oppinions would be good??? Thanks.

They're ok engines, just not blessed with good torque figures out the box.

The max power you can really squeeze out of one without any internal work is about 400hp. After that you need to go forged plus swap the box for a 25 one, or you'll chew it to bits.

Edited July 15, 2008 by Mark_McQ

[mark_sudakov]

What do u mean its not a good engine? Of course its a good engine, but a 2.5L engine will make more power obviously and more torque.

[Cubes]

The RB20's are great motors just not crash hot for the street.

Place them on the track with a decent turbo and they are in there element.

[ZENNON]

i love my rb20 and most driving is on the street

[bubba]

RB20's aren't that bad. Mine took an absolute hiding and it was a lot of fun. But, now that I have a 3L there is no turning back! muahahaha

[NWR31]

i love the way mine revs, very smooth, almost like a rotary

turbo upgrade soon should provide more grunt

Edited July 16, 2008 by norwest_rumbler

[abu]

RB20s are alright with a few mods but you need to spend quiet a bit on them to get them going pretty good, you'l get over it pretty quick I reckon

I did..

[brent32]

they are getting a bit old now but if your lucky and previous owners did proper maintenance you can do the zorst and boost thing and spank em pretty hard before they break. The lack of torque is just more of an incentive to revs the guts out.

[Luke88]

if i could make about 160rwk i would be happy just untill i put a 25 in it. i just dont want to spend any money on it and i cant afford to blow it up. i have a spare gear box if i blow it up and a spare button clutch.

[Roy]

  abu said:

RB20s are alright with a few mods but you need to spend quiet a bit on them to get them going pretty good, you'l get over it pretty quick I reckon

I did..

You needed to get a TD06, i would be surprised if you quickly got over the entertainment 260rwkws provides

[Luke88]

yer i no ill get over it in like a week but i cant afford to blow it up lol. as soon as i get the cash ill put a 25 in it.

[ZENNON]

  Luke88 said:

yer i no ill get over it in like a week but i cant afford to blow it up lol. as soon as i get the cash ill put a 25 in it.

you'll get bored with 260rwkws after 1 week?

[Cubes]

I 'almost' have but maybe that's because of the linear easy to drive power delivery of the rb30 and a medium sized gt30 turbo.

[ZENNON]

  Cubes said:

I 'almost' have but maybe that's because of the linear easy to drive power delivery of the rb30 and a medium sized gt30 turbo.

lol - almost what? got bored of that much power? yeh maybe but surely not after 1 week

[RaZ_TuRbO]

rb20s are sweet! i just went 25 cause i blew mine up and got a great 25 at the price of a 20...

[brent32]

The thing to consider with gtst power ups is all the extra expenses you face when going over 200rwkw. Once your car is putting out this level of power you start to realize the other limitations of the car and chassis, suspension, brake and tyre upgrades dont come that cheap (also trying to get your speedo to work with a 25box is a challenge). My rb30 only does 200rwkw with a small internal gate turbo at 15psi, of course it has great response and torque but i do miss the old RB20 lagmaster and its rev happy nature. The best thing about the new engine is knowing its 100% reliable at these power levels, with my old RB20 setup i always knew something would break sooner or later.

It turned out to be a track day in darwin at 35 ambient temps and some overboosting that killed my RB20.

[limpus]

You're asking for a flaming by saying the rb20 is not a good engine...

THe rb20 purists here are brutal...lolz...

Mine was 18 years old and made 237rwkw @ 19psi and has humbled a few bigger engines in its day with its power and reliability...its not the best engine around but i would still consider it a good engine...

[Cubes]

  brent32 said:

My rb30 only does 200rwkw with a small internal gate turbo at 15psi, of course it has great response and torque but i do miss the old RB20 lagmaster and its rev happy nature.

Get a larger turbo on the rb30 and they rev like buggery.

Mine went from peak power at 4400rpm and shifting up at 5-5.5k with the stock turbo and a vg30det turbo to making its peak power at 6000rpm and shifting up at around 7000rpm with the GT30 .82.

I definitely would not recommend a smaller turbo than the gt30 .82 on the rb30's.

Hey... My stock 200,000+km old stock suspension held 268rwkw fine. Was just a bit unnerving when coming off the throttle in third gear thats all.

The biggest problem I had was the subframe moving around and rear hicas tierods that were shagged.