Nissan Skyline
Nissan Skyline


*R32 GTS-T
*R33 GTS25-T
*R34 GT-T
*R32 GTR
*R33 GTR
*R34 GTR
*R34 Z-Tune
*V35 GT350

Tuning Guides
*R32 GTS-T
*R33 GTS25-T
*R34 GT-T


*Project GTS25-T

Tech Resources
*Airflow meters

*Project GTS25T





Home > GTS-T Article

Nissan Skyline
Nissan Skyline
Nissan Skyline
Nissan Skyline


You may recall the R31 Skyline or the VL commodore both cars came out with a 3ltr, single overhead cam engine named the RB30E, or in turbo form RB30ET. Like later model Nissan engines it had great strength and tuning potential.

So, many serious enthusiasts thought it would be a good idea to build a hybrid engine for the best of both worlds, this would provide you with, extra displacement if you had a latter model RB engine, or a twin cam head if you had the single cam RB30 engine. Take a RB30 bottom end, add to it a twin cam head from a later model skyline, put them together, and your left with a RB30DET. If you own a RB engine and looking for 300+rwkw this engine should be seriously considered.

Producing 350+rwkw with a RB25DET (for example) is achievable but unless your engine is capable of revving to 9000rpm your power band will be limited (dyno readings will be peaky). This is because of the size of the turbo needed to produce this power, larger turbos take longer to spool, boost may not come on to 5000rpm, and in a street car this is not desirable.. Creating an engine to reliably rev to 9000rpm is extremely expensive as your heads and internals would need to be modified extensively.

This is what makes the RB30DET a fantastic choice as you donít need huge revs to make power. The extra displacement of this engine means boost will start to build earlier in the rev range and maximum boost will be produced much earlier. Modification to the internals may be needed but not near as many compared to a smaller displacement engine. This option is still by no means cheap, but it is cost effective compared to other methods.

The following webpage contains a PDF document which provides information on how to build one of these torque monsters.

RB30DET Guide