[deadmaninc]

Originally posted by 99GLE
Can I put a Fifth Gen (2000-2001/3.0) engine in my fourth Gen?

No…. Well Maybe, but why? The fifth Gen engine is the same basic design as the fourth gen engine. It is rated at 222 HP compared with the fourth gens 190, but makes basically the same power until after 5000 RPM. Some of this increase comes from slightly improved exhaust, if you put an aftermarket exhaust on your car it will be much better than the fifth gen exhaust. The Majority of the gains come from the intake manifold. The fifth Gen intake manifold is a dual runner design, it switches to shorter runners above 5000 Rpm for improved high RPM power. In the fourth Gen power drops off quickly after about 5500 RPM due to the long intake runners. Any engine swap on a Nissan is going to be a huge undertaking and very expensive, It would be much more cost effective to Mod or Boost your 4th Gen. No one that I know of has done an engine swap yet. If for some reason you still want to attempt this – Search, there are about 2.5 Bazillion threads on this.

Here is a comparison of 4th vs 5th gen engines courtesy of Stevtec, as you can see there is no major power increase until after 5000 RPM.


How about a fifth Gen intake manifold?

Maybe, but why? There is now a fourth gen Variable intake Manifold available. It is not a true dual runner design like the fifth gen and will not give your engine the same increase over 5000 RPM that a fifth gen has, but it still is a great improvement over the stock intake manifold. Putting a fifth gen intake manifold on a fourth gen would probably involve replacing everything from the top of the head up, a huge undertaking. There are many threads on this but this one seems to cover most of the problems with this.

Can I put the fifth Gen 3.5 engine in my fourth Gen?
This would be a huge and very expensive undertaking for many reasons. It would be much cheaper to turbocharge or supercharge your 3.0 engine. There are many threads on this, Search. Here are a couple to get you started –

http://forums.maxima.org/showthread....hreadid=138366
http://forums.maxima.org/showthread....hreadid=133127

All information thanks to Anachronism over at www.maxima.org

Well yes this is all true but you also forgot that the 5th gen 3.0 also had a more agressive ECU system.