A Boy's Love For His Rb20

[FineLine]

looks like a ginga convention.

[Roy]

Nice to have a fresh engine again. New motor makes the same power as the last motor with less boost and earlier. Will put 1,000kms on it and do some coolant and oil flushes and then throw the new turbo on. Hopefully bag another 30-40rwkws and pop 350 Should make for an interesting drive at PI next month

[darkraid]

How did you freshen it up? Nice to see that a fresh motor makes a difference to the performance. I'm preparing my RB20DET build at the moment. Going to be using a TD06SL2-20G and a Sinco top mount manifold (similar to 6boost) and other supporting mods.

Crazy to see so much power out of a little 2 litre!

[Roy]

Well since I am not in a habit of leading people astray the new engine isnt actually 2L. Um and its not actually an RB20...i can't even bring myself to admit what it is Nothing like a self loathing car owner

At least the engine came out of an NA R32 so at least its not as filthy as something from an R33. So its an NA RB25 that has been rebuilt with Eagle rods, Arias pistons and 25 crank. When I throw the cam gears in after easter I will throw my Tomei Poncams in as the NA cams are rather small.

I am looking for some Garret cores so that I can start building the manifolds for the twin setup I want to run. If I am going to go twin low mount lameness I at least want to have some fun fabricating all the bits

[darkraid]

Was it still an RB20 (2litre) when you did 306kw?

[Roy]

Was it still an RB20 (2litre) when you did 306kw?

Yep...1000000% Std unopened RB20 engine that I think came out of an auto Cefiro when i chased back the engine number in FAST

In tank Nismo fuel pump, E85 with ID1000s. Plazmaman plenum with 6boost manifold and 8cm TD06-20G and 45mm Turbosmart gate with R34 GTR Cooler and Z32 AFM with HKS Hyper exhaust. Guaranteed to make at least what my engine did. It was a wrecker engine when I got it and it has since done 60,000kms of 250-310rwkws with a load of track work

If I had my time again I would have kept the std inlet plenum and the Greddy exhaust manifold. The thing had a measurably better mid range and torque. The plazmaman plenum really made it into more of a top end screamer

It would still be going if it wasnt for the heater hose the split under the inlet manifold in peak hour traffic. That engine is going to get stripped down and get slowly built back up with my spare RB26 crank and my RB24 gear for whatever R31 I end up finding

[TTT]

Rb25 for life Roy

[Roy]

I pick it up Mon arvo. I already have a little bit of vomit in my mouth thinking about driving a 25

[R31 POWER]

Its ok, you are one of us now. At least it will turn a tyre now hahaha jks.

[DJRIFT]

good stuff roy you can be in my crew now. besides i love telling people that my rb25 had far more in common to a rb20 than a 25det. they are a rb20 in evey way bar displacement

any reason you put a rb25det crank in yours?

[Roy]

I didn't put anything in it. I grabbed it as it was cheap for what it was and have no idea about it really. Was nice to that it tuned up well and looks and sounds healthy

I bought it years ago whilst I was in India as I wanted the head in case I ever put my RB26 bottom end in it. When i took the sump off and looked at it it seemed too good an engine to strip so just kept it and threw it in when the RB20 had the overheating problem

Pretty happy with how it turned out. Pretty happy with the power it makes...just to see how it holds up to being raped at the track

[Roy]

So the new engine hits about 18psi at about 3,600rpm. Has loads more power at 4,000rpm but around 5,200rpm the RB20 basically matches it. So curious to see how the cams, cam gears and a full tune at more boost does

[robots]

Final countdown !)

[darkraid]

So what is the engine now? A RB25? or a RB24?

[Roy]

2.5L

[feifongwong3]

Roy you used to be my hero...... I'm disappointed in you.

[Roy]

I hate myself

But, the cheapest way I could get the car back on the road ready for a track day was to use a spare engine that was laying around. I grabbed this engine cheap years ago as it was cheap and externally looks like an R32 RB20. Thinking was if I ever get defected then I would put it in with a 2.8L kit and run an XR6 GT35R bolted onto std manifold for legal thrills to clear defects and be stress free

I am going to strip down the lil 20 over the coming weeks and see if it was just a headgasket and if the head and block come back crack free going to slap it back together with a refresh and get some more exprience with building engines.

Then the abomination that sits between my strut towers at present can come out and be sold. Should be easier to sell now that I have had it running and it looks to be a good engine and potential buyer can hear, see and even drive it before removal

I can already tell you I dopnt like the character of the car. It has way more power down low that makes it spritely on the street...but feels flat. People can say it maky be quicker but doesnt have any character or top end pull that the 20 had:( LOL time for a bigger turbo to get some lag back

[TTT]

lol.. you would have to be the only person in the world who complains about having more power earlier.

[Roy]

But there is nothing up top! Doing track work and only suign 4,000- 6,500 is pretty crap. Would rather 5,000-8,500.

The NA cams are probably not great for power so will look at using the RB20DET cams or more likely my 256 Poncams

[sav man]

The RB25DE's usually love to rev, as they are based off the mighty 20