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RB25DET - 3 Litre Conversion Completed?

the_tonkau

By the_tonkau,
in Engines & Forced Induction

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Sydneykid Grand Master

Sydneykid

Posted
Posted
Great info ...  go the sweet taste of Jack

But ... if you had RB20 setup currently, what would be the logical way to go? Which head would you use?

Also, can you use any bits from the current setup?

In R32 GTST's I prefer the R32 RB25DE top end as it doesn't have VVT. The RB20DET stuff (sensors and manifolds) all basically bolt up, so the R32 GTST wiring harness and ECU work perfectly.

Bits from the current set up, I assume you mean RB20DET. Note that the new RB31DET has an RB26 top end. So I used the injectors (S5RX7T), all the sensors, ignitor, coils, alternator, starter, oil cooler, remote oil filter, radiator (PWR), electric fan (Davis Craig), air filter (pipercross POD), heat shield, ambient air feed, Power FC, Commander, gauges (oil pressure & temp plus exhaust gas temp), sump (it already had wings & baffles), intercooler (std R33 GTR), some intercooler pipework, engine mounts, OS Giken twin plate clutch, fan belt, power steering belt, bottom radiator hose (silicone), alternator bracket, power steering pump bracket, throttle cable, fuel pumps, adj fuel pressure regulator (Nismo), adj camshaft pulleys (Jun), plus lots of mounting hardware, nuts, bolts and washers.

We also have a Stagea, and I will use some of the (no longer needed) RB20DET bits on it. Like the RB25DET turbo (GCG ball bearing hi flow), split dump (Performance Metalcraft), old intercooler (Group A Supra), some pipework, boost controller (Autospeed) and exhaust (suitably modified). I try not to waste anything that is good/useable.

Hope that helps, Happy New Year:cheers:

Sydneykid Grand Master

Sydneykid

Posted
Posted
happy new year guys, my new years resoultion will be a RB30 GTS4

Could someone point me in the right direction for a 4WD sump adapter. I am in Sydney

RIPS are the only people I know who sell them.:P

Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

This engine drives very nice on the street.

I still cant get over the fact that the bottom end can handle 475BHP with stock cast pistons.. lol

What about stock bearings? like ACL brand ? can they handle that power too?

SydneyKid: what ignition timing have you seen RB30DET's (with 25 heads) use on full boost ?

The max power out of standard injectors i could have got was 240rwkw but that was standard fuel pump too. upgrade the stock pump to a bigger unit and you might get more with a Adjustable Rising rate regulator - but thats really unsafe way of doing it and its a prick to tune them at times. (can be inconsistant)

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