Engine Swap.

[racingchick19]

I have an 89 240sx that I race at a local asphalt track. The engine however is getting quite tired. I have a couple options as what to do now.

1) I have a freshly machined KA24E block bored to .02. I have a rebuild kit to put that one together, I just have to order the pistons and rings. Would the engine get hot fast now due to the boring?

2)Swap the KA24E with a KA24DE w/the wiring harness and ECU.

3)Swap with a Z22. Can someone please explain the pros and cons of the Z22 containing 8 spark plugs? Does it hold up to continuous high RPM's? Can you make it fire as a V8, and would that create more power or would it just be the same and more of a hastle than anything?

4)Pull the one I have in there now and through a rebuild kit in it. Only problem with this is I race every Saturday for the next 6 weeks so I almost have to have something ready outside of the car to make for a quick swap to make the next race. I'm not a fantastic mechanic so I have to have enough time to get things done.


Any advice would be great. Thank you.

[zachattack_5491]

1) .02 over will not have an effect on temperature.

2) If you find someone with a DE that they are tossing out, take that option.

3) Never heard of a Z22, sorry.

4) For the price of a full rebuild you could swap in a much better engine, and spend less time on it.

[btm88]

A Z22 is from a Datsun, they are 4cyl but have 8 spark plugs. They are very hard to find parts for, and I would not recommend swapping one in. Go with the DE, they are easy to find, pretty cheap, and make better power than the Ka24E.

[racingchick19]

Ok, awesome. I'll probably go with the swapping of the E to the DE.
Thanks for the advice!