Originally Posted by GSXRJJordan

LOL @ people with RB20's saying "they're fine". Riding a pedal-bike is 'fine', walking is 'fine', but who the fuck wants to go slow?

If you're going to do all the work of putting a RB-series motor in (instead of a SR, which is drop-in), wouldn't you want something that's actually better than a SR? The price difference between the motors is usually $1000, and you need a new driveshaft (~$300) with the 25 (you can use a stock M/T driveshaft with the 20), but the performance difference is huge - plus, the "cap" on what you can get out of it with a turbo/injectors/maf/tune upgrade is MUCH higher.

As far as budget goes, you're looking at $2500 on the motorset, $600 on mounts and a driveshaft, $200 on a radiator, $100 on a timing belt, $300 on new water pump, oil pump, idler and tensioner pulleys, $300 on a intercooler kit, $250 on an intake manifold (stock IM + FMIC = lammmmmme), $200 on wiring (average), and say $200 for random shit like gaskets/fuel filter/fuel hose.

That's ~$4700 if you can do it yourself, another $500-$700 to have a reputable person swap it for you. WAY less than $7k.



300whp can be done with a stock RB25. If you had a RB20, you'd need a new turbo/injectors/tune/MAF - it's no longer cheaper. Plus the torque of a RB25 is what's fun on the street, more than anything else - just ease into the gas and feel the smile creep over your face.



Lots of importers in socal, shop around and find one that you're comfortable with (good price, startup warranty, etc). Marco @ SR20store and G-Dimensions are the "good ones", and if they don't have any RB25's they can point you in the right direction.


The biggest difference is age - all the S2's are fairly new motors, and are generally lower mileage. People that prefer S1's generally like the fact that there are many more S1's floating around, so it's easier to find parts. I have no preference.



Uncut wiring is nice because you can be fairly sure that there won't be any electrical problems once you have someone convert the harness. I do these swaps a lot (and do swap wiring professionally), and charge more to inspect everything if you start with a hacked up harness.

PM me for pics of my work/etc and I'll talk pricing on doing the swap with you, or point you to some people that can help you locally.