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Changing from RB20E to RB20DE

NidgeNOS

By NidgeNOS,
in Naturally Aspirated Performance

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NidgeNOS Rookie

NidgeNOS

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I have got a R33 GTS with RB20E engine in it. I think the head gasket is leaking as there is oil leaking around the top cover!!!

Anyways..I thought rather than doing any work fixing this engine..I wanted to change it for the RB20DE (get a bit more power with a little loss in fuel economy? (its my daily run around so can't afford the petrol bill of a turbo)

Does anyone know if this engine can be changed in to the my R33 chassis? Will it be a straight swap or do I need to change other things like the gearbox and clutch?

Thanks

Going on holiday for a week soon so thought I'd send my car to the garage while I'm away! :(

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NidgeNOS Rookie

NidgeNOS

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Might be right about the rocker cover...I'm might be giving parts the wrong name! cheers. My oil pressure fluctuates while driving at steady speeds, could this be due to the loose rocker cover?

And yeah had a chat with my local mechanic...said the wiring probably needs changing and other bits and bobs which would add up to a big labour bill....might aswell get a proper engine put in!

So I think I will try the sealant for now!

Was hoping that it was just a case of unbolting the rb20e and dropping in the rb20de...nevermind. Just happened to come across a crashed RB20de.

Whats the fuel eco of RB25DET? I do 60miles (100km) everyday so i presume my fuel bill will be massive!

Thanks for sharing :thumbsup:

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Eug Grand Master

Eug

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Rocker cover dusnt have any affect on oil pressures... (what exactly are u talking about??)

oil pressue will fluctuate when u apply the throttle accordingly (there is a thread with the

correct oil pressures when idle, and throttle, etc - try a search)

Fuel economy varies as alot of force induced cars have either been boosted or have some form of extensive modification - I am not sure about the stock standard economy you

will have to try a search, or post in the forced induction section.

As for an RB25DE (non turbo) I have managed a bit over 1/4 tank for about 200km

that is about 20~25L driving pretty hard.

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paully_tee Collaborator

paully_tee

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theres a big difference in price between a rb25de and a rb25det. If u wanna keep it non turbo then i recomend a rb25de. makes alot more torque. A decent mechanic should be able to do the labour costs for 500-600 i rekon, as this is wat i was quoted to do a rb25NEO in my r33. Bear is mind that other bits might need changin as well so these are additional costs.

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Eug Grand Master

Eug

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Is the RB25DE and the RB25DE NEO-Spec a straight swap conversion? I am aware that

the Neo has a few extras such as stronger internals? and bits here and there...

but things such as wiring? ecu? compression? could you just swap the engine and retain

the old stuff.

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NidgeNOS Rookie

NidgeNOS

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Think the RB20E will be able to take a shot of N2O just for fun? or will the internals be a bit weak on this engine?

The oil pressure gauge shows a lower than usual reading every so often at idle and in motion. I know it should change on applying the throttle but the reading doesn't seem to show this.

There doesn't seem to be any performance problems, just the leaking engine.

Whatever, I'll leave that to the mechanic.

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