Posted 17 February 2009 - 06:15 AM
Thanks everyone! I really appreciate it.
723, I chose an SR20 for these reasons:
I decided that, in my opinion, anything over 400HP is really undriveable as a "sports car" in the Z. Sure, I can make a novelty car that people talk about or are amazed at... and I can tub it and build a drag car. But to actually use all of the techniques of sports car driving, with the weight of the Z, 400 was max. Also, with this, I wanted to be sure that I could get smooth power delivery... no spiking on the powerband.
For these first two, just about any of the swaps will do. VQ - RB - SR. I've done a V8 before and that isn't my cup of tea. I feel it takes the identity of a great car away and makes it a wannabe. I also know that I'm not getting this kind of reliable smooth power out of the L series engine. Maybe someone is doing it, and I really respect that. But I wanted a genuine Nissan swap. Lastly, I didn't even consider a JZ or anything else. Just my opinion and answering your question, but I think the Z deserves more than that... having just any random heart put in it because we want to be creative and happen to own the unfortunate Datsun.
So, the VQ, the SR, and the RB. I think the VQ needs more revs. I think it needs more room to breathe, and I think it doesn't "feel" like a good engine to me. In the 350Z, I think it feels like someone needs to take out the rotating mass and balance it. Every 350Z that I've driven: turbo, supercharged, and NA, feels like this. Don't know why. However it is brilliantly torquey. So that left me the SR and RB. Both are more than capable of giving me the 400HP number. Both can even get that peak number with a beautiful dyno curve. I looked at many of each engine before making my decision. The RB is incredible, but I don't get why it's in the Zs all around. I do get the story of it, and think that's awesome. I love 240Zs with it. But I wonder if they really drive it well or if it's a talking piece. The SR is so much lighter and will mount so much more aft than the RB will that to see the setup scales of one car to the next the front wheels would be carrying SUCH higher numbers that only a race car driver can appreciate. This can with it's uber-long hood needs no more help in sticking even more weight even further out to the snout. The SR does the job I want it to do and is the lightest engine I've mentioned. Plus, although it's cool and JDM, it is quite plentiful in modification parts. Everything has been very easy to get ahold of (other than a new wiring harness).
All the power, but compact weight... all behind the steering rack. And my heart, unlike some other swaps, isn't repulsed by the abonation. I'll never feel like it was a redneck frankenstein.
That's my opinion. I don't want to make any enemies here. Just answering your question to the best of my ability.