I know its rice, so you can move onto another thread now.
However if your still here, listen to my thoughts and add constructive
criticism/discussion. Being that this is Honda-Tech and home to some of the best innovations around I thought you guys would have some optomistic view points.
The C30/C32 are great motors, and as far as production NA V6's, they are excellent performers. Now its no secret that the NSX could stand to have some more power. And thats when I started to notice the glaring problems with the C-Series. One, there are not a lot of choices and two its down right scary expensive.
I would say that 300HP to 400HP is a good respectable amount of power for an NSX. To get that power on a C30 your going to either have to rebuild the motor for NA power or go turbo/supercharger. To go either of those is going to cost at least $10,000 when all is said and done. Even more if you build the engine and
add forced induction.
Consider the following....
Cam Gears: $1000
Do you see a pattern here? And the fact that there are only a couple NSX orientated parts dealers means there is not a real good guarentee on the future availablity of those parts should you break something. Of course alot of this stems from the fact that there just isn't a big customer base for aftermarket parts for the C-Series, so its only natural that prices would be high and availablity scarce.
So enter my question. Why not put a proven motor in that can make similar power and doesn't have the drawbacks of a limited production motor?
At first I though about the B-Series, but that didn't last long because of two things mostly. The engine would be 180* from the natural alignment of the C-Series and you would have to work out the issue of a cable shifter (NSX) on a rod actuator (B-Series).
But enter the K-Series. Its aligned in the same direction as the C-Series and they both use cable shifters.
Now normally it would seem stupid to go from a V6 to a 4 Cylinder. But its no secret that the K-Series is possibly one of the greatest 4 Cylinders ever made. It may not have the most "power" of 4 cylinders out there, but breathing on its own it puts down impressive numbers. In fact a lightly modified NA K-Series can make as much power as a lightly modified C30. Not to mention the K-Series with just 10 PSI of boost can make as much if not more power then what the SRT-4/STI/Evo engines make with 18-20 PSI.
Extremely effecient motors
Here are some of the benefits I see with the K-Series
1. Stock configurations allow up to 2.4L....not all torque is lost.
2. Hondata K-Pro is extremely good tuning software and much cheaper than AEM EMS and large support base.
3. Aftermarket parts are getting cheaper and more plentiful as time goes by. Not B-Series plentiful, but getting better.
4. Probably weighs what, a 100 pounds less then the C30? Brings the curb weight of the NSX down to what a Civic would weigh. So the K-Series would not be seeing any extra burden.
5. Might improve the slightly aggressive wight bias of the NSX.
6. Adds 6 speed transmission.
7. More room in the engine bay for turbocharger.
8. Turbo's would be way cheaper on a K then a C.
9. You could probably sell the C30 & Tranny for like $3000 and recoup the cost of purchasing the K-Series.
10. A 91 NSX would not need the OBD junk, so as long as the car can pass the sniffer, you'd probably be OK.
11. I personally do not have a big desire for V motors, I like small straight motors (mostly because they are easy to work on).
There are some issues I could see during installation. The good news is that there would probably be alot more room to work with, since the C-Series is pretty damn wide.
You would definently have to custom build engine mounts. I think you would start by mounting the engine to the subframe and then going from there.
The shift cables would take some work, as they would have to come around the back of the transmission.
I'm guessing that the NSX guages used a similar setup as other 90's Honda's so it might be possible to use them much like 90's Civic or Integra guages can function with a K swap. Although I don't know how the tachometer would function going from a 6 cylinder to a 4 cylinder.
One of the advantages to this swap as opposed to RWD Del Sol's and Integra's you see around here is that this car is already setup for a FWD drivetrain in a mid-engine configuration. So alot of things are already kind of taken care of, such as cooling and suspension.
I'm guessing for CV Joints you would need to make a hybrid with K-Series inner splines and NSX outer splines. That would take some trial and error for sure.
This would give the K-Series a real golden oppurtunity to show what its capabable of. We have plenty of guys making anywhere from 300-700 HP on K-Series and it just gets harder and harder to get traction in the FWD setup. Here you would be able to run an LSD on a something like 235's or better and put it all to the ground.
Of course this is more for Drag racing and street cars. If your into Auto crossing or Road Racing then you probably would not want to lag of a high horsepower 4 cylinder, but for street terrorizing I'm sure it would be a blast.
I've got the Helms for both the NSX, RSX & integra, so it makes it a little easier to visuallize alot of this stuff. Definently need it for the wire harness frankenstien.