I just cracked my head on my non turbo Calais, and i was wondering if anyone knew the price on a rb25 turbo engine package, and also what i would need to do to the car to handle the power and everything???

I was thinking of doing this about a year ago so i emailed japanese motorsport and i think it was $1800 or sumthing like that and they said a whole engine rebuild would be needed. I think you also may need a brake upgrade, not quite sure on that tho. I hope that i have helped a bit Cheers, Scott Some original photos have not been recovered yet.

www.gweeds.net <--- this is a guy in NZ who did an RB25DET conversion to his 2.0L kiwi Vl. Have a look at the site, there's probably a lot of useful stuff for u on there.

My advice is not to put an rb25 into a VL ,on the performance forums website we have never ending arguments between Skyline fans as to whether a smaller rb series motor is better than an rB30. I'd go for an atmo Rb25 engine package for around $1500,fit the head & management onto an rb30 block,fitting an Rb25 to a vl results in a car which needs to be revved above 3000 RPM to get any torque out if it,you can also turbo the RB30 for a hell of a lot more power as well. A bloke fitted the RB25DET to his R31 Skyline & regretted it,he is now fittingthe head onto an rB30 bottom end

You cant just bolt the head onto the RB30 block and away you go...the injectors/engine managment is designed for a 2.5 Litre motor not a 3litre so it is going to run exteremly lean, theother thing is you will have to lower the compression of the motor by either putting turbo pistons or a spacer in otherwise your compression ratio will be way too high to run any decent amount of boost, The easiest way to go about it would to be either buy a kit to turn your N/A motor into a turbo or do a straight sway with an entire RB25DET motor Good Luck

Yes you can! Fitting an RB25DE head to an RB30 block results in an 8.3:1 compression ratio which is a good compression ratio for turbocharging,if going for high boost levels the atmo Vl pistons will be no good however. A VL down in the summernats if I remember rightly used an atmo computer and it was turbocharged,it won in the 6 cylinder class for being the quickest car that year,if leaning out is the problem I am sure bigger injectors could be fitted,perhaps a chip rewrite if it was an R32 engine or use the whole turbo computer if off an R33 Skyline. Go to the performance forums website,there is a bloke who regretted swapping an atmo 3 litre for an Rb25 turbo engine setup into his 3 litre Skyline as it lacked the low down torque which made it less driveable than an RB30,even non turboed the the RB30DE has at least 160 kw is obtainable as long as the ignition timing is backed off to 20 degrees BTDC due to its lower compression ratio.

Go do a search on this forum on engine conversions, or go look in the turbo's/ managment area. or go to www.meggala.com <-- he is the expert You will get a compression ratio of aprox 8.3 to 1 if you bolt the RB25 head onto a turbo bottom end or an N/A bottom end with turbo pistons, If you just bolt the head straight onto a N/A bottom end then you will get slightly higher compression that a normal N/A motor......trust me

These engines Meggala was talking about ,the turbo engine is just an example of a turbo engine built by tuners with a 7.5:1 compression ratio,the Rb30DE I was talking about was one out of the ZOOM magazine which was just an RB30E wearing an RB25DE head It was done to an R31 3 litre Skyline and they suggested the 8.3:1 compression ratio using n/a RB30 pistons,and that it would be ideal for a high pumping turbo (wouldn't run it too high with the atmo pistons though),but running in N/A form necessitated bringing the ignition timing to 20 degrees BTDC so the motor wouldn't be sluggish down low. The RB30DE engine he was talking about also was actually produced on a limited run (he told me that) in Japan and fitted to the R31 Japanese Skyline for racing purposes and was never mass produced,it had a 9.5:1 compression ratio. Another example of engine which different people have come up with is using just the RB30 block & crank,then using the higher compression RB25DE pistons in the 3 litre engine due to it having the same bore diameter,it achieves the higher compression ratio because the Rb30 has a longer stroking crank than the 2.5,results in a 10:1 compression ratio,just metioned that for anyone interested in this engine.