Down-grade 1991-1993 240SX SE?

[jerryk]

If I have a 1990-240SX SE 5 speed, can I take my motor, dashboard, harness, ECU, manual transmission, drive shaft and VLSD and place it in a 1991-1993 5 speed 240SX? Which harnesses would I need? I want to do this is to get better mileage and run on regular gas.

[Cleveland180]

the KA24DE's can run on regular gas... you only need premium if you want maximum performance... Yeah you could do the swap though... it wont be too hard at all. just a lot of work.

I would sacrafice the couple of mpg's for the dual overhead cam engine personally, but the SOHC are respectable engines too.Do an intake and you should achieve close to the same gas milage.. I guess if you really didnt care about the Single overhead, then just swap the drive shaft lsd, and axels. Why are you swapping the dash? Is the other one cracked? but yeah they are interchangeable

[180fan]

dohc's can run fine on regular. clean the combustion chamber of carbon, tune up, and cts. adjust the timing and make sure all your sensors are working fine (tps, mafs) which will require a multimeter and some brake cleaner.

Never really saw too much of a mileage difference with the dohc vs the sohc or at least never anything conclusive. search around for swap options.

Mileage varies on how you drive.

[jerryk]

dohc's can run fine on regular. clean the combustion chamber of carbon, tune up, and cts. adjust the timing and make sure all your sensors are working fine (tps, mafs) which will require a multimeter and some brake cleaner.

Never really saw too much of a mileage difference with the dohc vs the sohc or at least never anything conclusive. search around for swap options.

Mileage varies on how you drive.

I am looking for a replacement 90' frame for my new running gear and many new parts. I wanted to know what the downside would be if I get a 91-93 frame. I drive between 3000 - 3800 RPM on the highway and get a true 30MPG, in the city 27MPG. I stated it in RPM because my speedometer is not registering more then 45MPH. The odometer and tack are still working. I purchased this 90 SE used in 91 for $7,000 it had a battery explosion and that may be why I have such a bad rust problem. This SOHC has 229k and still on the original chain. The oil is changed every 2,800 miles no leaks, none of the purple BS. I have reduction pulley system, K&N intake and hotshot header stainless steel Random flow cat and Borla Cat-back. During the years, I replaced the radiator water pump master and slave clutch cylinders. My last Centerforce clutch went 70k and I just had the transmission completely rebuilt. She sits on 17” wheels with Eibach 1” drop springs and Tokico struts and shocks. If I could find a way to fix my baby’s rust for under $2800, I would do it but every shop I take it to say, it is a real bad problem and will not guarantee the work. This car owes me nothing. I am 66 years old and want the car or its replacement to go another 17 years so this project may be the last car that I drive.

Seven years ago, I did a slight design / paint job change and everybody asks what kind of car is it or wants to but it.

Here are few pictures.
Modified by jerryk at 2:10 PM 3/15/2007