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Rb25det To Rb Non-turbo?

Dorigecko

By Dorigecko,
in Engines & Forced Induction

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Dorigecko Proficient

Dorigecko

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Hey guys, I'm wanting to rebuild my RB25DET, but seeing as how a) it'll take some time and b) it's a daily driver.

What needs to be changed over in a conversion like that? I've got a standard computer and loom, RB20 gearbox, and a 3" exhaust *gulp* and am wanting to go a bog-stock RB30. I've had a soft-spot for NA for a while.. so yeah.

Any help would be awesome, thanks.

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https://www.sau.com.au/forums/topic/287736-rb25det-to-rb-non-turbo/
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N-DAWG Mentor

N-DAWG

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You're rebuilding your current engine as in strapping on a RB30 block? Or you want to go either RB25DE or RB30DE? There was/still are a few listings on ebay for a RB25DE reconditioned block, RB25DE 10:1 CR Pistons, the crank and I think a few other bits.

Dorigecko Proficient

Dorigecko

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No no. I'm not doing anything flash, just wanting to bust in an engine I can destroy and do it fairly simply, while building my RB25DET to factory standards (yes, that's right. no forged internals)

The idea is to drop in an RB30E or RB25DE while retaining the RB25 loom and all that, so it's a simple conversion back to the 25. but in the mean time, i'm wondering exactly what needs to be changed to run the RB30E.

I gather that i'll need to run the RB30 computer, but is there any similarity that I can utilize between the 25 and 30 which would allow me to retain the 25 loom?

elsewise, it shall be a bigger job than anticipated.

mad082 Grand Master

mad082

Posted
Posted

i would be checking on the legal side of things of just putting in a stock rb30e. i don't know if you will be able to do it because you are fitting an older motor to a newer car.

it may be easier to just buy a second hand turbo motor and dropping that in while you do the rebuild. should be able to pick one up reasonably cheaply since you don't need to buy the gearbox, loom (if you get the same series as your current motor), etc. or if your current engine is still going but you just wanted to rebuild it, leave it in there and rebuild the motor you buy. saves the hassle of changing motors twice

SKiT_R31 Experienced

SKiT_R31

Posted
Posted
I gather that i'll need to run the RB30 computer, but is there any similarity that I can utilize between the 25 and 30 which would allow me to retain the 25 loom?

nup, completely different.

You best bet is RB25DE, which as its only temporary, will run fine even n/a with turbo gear (ecu/loom/sensors/injectors etc) or if you get one with injectors etc, using the N/A ecu on the det loom will be fine, the car will drive perfectly.

Dorigecko Proficient

Dorigecko

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pretty sure that's a retarded response. no offense, but check location next time.

thinking i'll wait for another 25det to show itself to me. either build that one or bung it in. problem solvered. thanks dudes.

PandaR33 Enthusiast

PandaR33

Posted
Posted
pretty sure that's a retarded response. no offense, but check location next time.

thinking i'll wait for another 25det to show itself to me. either build that one or bung it in. problem solvered. thanks dudes.

you dont have a location set mate.

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