i've owned 2 240s. regardless of highway or city driving, my 5 speed fastback got better gas mileage than my auto convertible.Jarret wrote:As for US DOT charts, they are not always correct on the fuel stats. Since I have 3 240sx's I can vouch for the auto being better on mileage on hwy and the std is better in the city. why:- travelling 100 miles on the hwy with the cruise on up to my cottage or from vacation to vacation, it doesn't take a rocket scientist to make the conclusion: ( same speed, less rpm, less rpm, less gas used= better mileage).Try it out for yourself, go on a trip with the O/D off and come back home with it on.-the std is better on city driving b/c it can always be dropped into neutral coming down a hill (wheels are spinning separate from the engine)and at a light, and thusly the engine isn't working to move the car when the brakes are holding it put.
-Jarret
Well the speed sensor is used and the speedo works. The performance milage issue is wrong. The ECU looks at A/F (O2) Air intake and temp (MAF and manifold temp) Engine temp and throttle position. The 4th 5th sensors are if I remember correct used to engage the speed limiter which we dont care about. I have already had this car to 120MPH with no performance issues. Codes I will agree will be set but the ECU has many loops to work with if it does not see those sensors. I believe when I reprog the ECU I can just write those values out of the loop.Jarret wrote:well since the speed sensor wont be plugged in at the tranny as well, the engine will be getting the wrong fuel air mixture and timing information by the ECU. It doesn't mean the car won't run, it just means the ratio's will be off because the engine isn't getting the input from the 4th or 5th pos. sensor.-so hence, poor mileage and less performance.
-Jarret
what are you trying to say here?Jarret wrote: Another word of note to those interested in the swap, the transmission for the 240sx autos went into the frontier truck as well an have a hugely gripping flexplate, consider a flywheel upgrade and leave it at that. Keep in mind the 240 auto has better passing at highway speeds than the 5spd and runs 4-500 rpm lower at 75 MPH = better fuel economy!
Hope that helps!
_Jarret
1994 LE
http://www.240sx.org/links/ins...p.htm has the full write up on the S14 manual conversion.maxima278 wrote:I'm in the process of doing this swap on a 96 S14, using a 95 manual shift car as a donor. Can anyone tell me how it differs from s13 to s14? it appears that my 'green' box where the clutch should be is just plain steel and my wiring on the passenger side doesn't seem to look the same as in your pictures. Is it any different?
I am replacing the engine and tranny wiring harness and all, so the fuse box under the hood will be out of the manual shift car if that makes a difference. My automatic car was burned under the hood and all the wiring harness melted.
Are the ECU's different? should I pop in the ECU from the manual shift car?
This is my first major mechanical endeavor so any advice would be great. I've got a parts car and some tools but not a whole lot of know how.
Thanks
I also have a 'vert with a manual tranny. I have an RB20det with 5 speed in Green Bay.Mr. Foully wrote:
And what's with this Big Daddy Johnson character? There CAN'T be another stick/vert in WI!!!
not yet. i was actually trying to get it to work on Big Daddy Johnson's car when it was still in the hands of my friend Jay. Jay and I spent nearly 2 weeks trying to figure out what was going wrong with it, but couldn't. The ASCD is wired into the Auto Trans Control Unit by two wires (probably a constant and a ground), but even forcing a ground from one of those didn't get the cruise to kick on. We pulled the inhibitor relay thinking maybe that was the problem because it completes the cancel circuitfor the ASCD (so you can't set cruise while in park or neutral I suppose). Even went through and took out the wiring trick to get the top to work thinking that since the car was jumpered into park, that the ASCD may be getting mixed signals from that. No go. The ONLY thing I didn't try was disconnecting the park/neutral jumper, but then the car wouldn't even turn on. I have never spent so many days staring at wiring diagrams and schematics trying to figure out what was wrong with it. We even tried changing all of the ASCD components out. ASCD box, cruise actuator, cruise cable, and steering wheel. Nothing worked.den240 wrote:Bart, did you ever get the ASCD working on your swapped 5speed?
anyone figured out a way to get to these bolts? it looks impossible without taking the whole motor out.tenkawa_akito wrote:
If you're doing a full on engine swap, go ahead and get the motor ready for removal, or otherwise, disconnect the tranny from the motor. This will be a pain since some of the bolts are going to be tucked up by the firewall. Heck, I don't even know if it's possible, since my experience for these swaps are done during engine swaps. After you unbolt the tranny crossmember, it will slide out.
I found it easiest to get to the top two toward the turbo-side///errr exhaust side of the engine from the top.csilvia wrote:anyone figured out a way to get to these bolts? it looks impossible without taking the whole motor out.