GEN 2 or 3 motor in datsun 510???
 

I building a 69 two door datsun 510. I was going to sr20 swap it but my roomate is doing it to his 71. I'm going to try the rotary thing but I know nothing about them. I don't know if I should use the gen 2 or 3 motor. I have haltech and I'm looking land in the 300+ HP range. Turbo for shure. It will be driven on the street but not all the time. how much power can you make on pump gas with one of these? please fill me in i know nothing about them. whats the difference in the gen 2 and 3 other than the intake and turbos?????

FC (gen 2) and FD (gen 3) motors can both require some pretty extensive modification to get into a 510. but as most fabricators will tell you, "If you have the money and patience, anything can be done." It'll also depend how clean you want the install to look. A cleaner install, one that looks like it was meant to go there from the factory, will also push the price up.

300+HP shouldn't be too much of a problem w/ either FC or FD engines. If you have a Haltech, it'll make tuning easier. Just remember, more fuel = more HP. Pump gas should be plenty if you're looking at 300+HP.

As for the differences between FC and FD engines, there are a few significant evolutionary design enhancements between them that will take a while to explain. I'm sure there are a few threads on the forum where you can find this info. Let's just say the differences between the 2 were to address additional HP handling and reliability.

As long as you keep both engines stock (which is fine at 300 horse, hell 400 horse too), you arent gonna notice much difference between the 2nd and 3rd gen engines. I personally would put a 12a front cover on it and mount the engine from the front (12a style). This is much easier to fab up than motor mounts for the side mount engines (2nd and 3rd gens). Use the crank pickup from a 2nd gen to run the haltech, and you are good to go.

PS. if you look in the search for dynos, you can find cars making 400 horse on pump gas.

Well actually any year 13b swap would be pretty much the same to mount into the 510. Same basic set up only different is if your going carbs / EFI / EFI with turbo. I'm doing one right now with a cosmo motor and doing a turbo charge. This car actually had a 13b in it, but I ended up re doing the motor/tranny mount cause the one on there was not to done very well. The motor was actually sitting cocked eyed, so out goes the old mount.

getting the motor in the car is no problem. I was looking for some info on the pistionless motor thing. Sounds like the gen 3 (fd?) is the way to go. I also think they look better too. I'm shopping ebay for one now. now about the turbo's? seems like the stock ones could be pushed to near 300hp. I heard the turbos are different sizes? small for boddem end and larger for on top? or is this total carp? I've seen and heard of HUGE ones run on this motors.

the 3rd gen motor is the way to go if you are looking to turbo and get high HP. just be careful buying engines on ebay. there is a lot of junk out there. if i remember correctly, the turbo unit is a sequential on fd's and are both the same size. one is gated for bottom end and the other for top end.