MSM engine swap in 90 Miata
10-06-2011, 05:14 PM
#21
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example:
1.8 na chassis with nb1 motor: why would you buy a 94-97 ms, when it seems as if it would be much less of a headache to buy the computer that's specifically made for that motor (esp. since its a completely diff motor, and 1.6 ms with a rotary??? now im really lost
) plus then wouldnt you run into tuning nightmares? (trying to get a 1.6 computer to tell a 1.8 how to run). and to my understanding, it will pretty much be plug and play (MS to engine harness) if you match the correct computer to the engine, i also dont see why youd create that other headache for yourself...(im not trying to stir some shitz up. im just trying to learn)
The typical 1.8 swap into a 1.6 has been done many times. You just use the computer and sensors from the 1.6. The 1.6 ECU can control the 1.8 just fine. The difference with my swap is that I am also adding boost, so just like I would use MS if I boosted the 1.6, I am using it to control the 1.8 without switching over the whole harness for the MSM.
The difference in opinion on which ECU comes from the fact that I already have the wiring and sensors to run the better MSM setup but I am using the outdated parts anyway.
Hopefully that makes it more clear.
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10-06-2011, 05:19 PM
#23
The typical 1.8 swap into a 1.6 has been done many times. You just use the computer and sensors from the 1.6. The 1.6 ECU can control the 1.8 just fine. The difference with my swap is that I am also adding boost, so just like I would use MS if I boosted the 1.6, I am using it to control the 1.8 without switching over the whole harness for the MSM.
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10-06-2011, 06:18 PM
#30
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Yes, I am using the 1.6 engine wiring harness. Less pain than swapping the MSM harness into my chassis (as far as I understand at least). As for gain, the engine will make roughly twice the power that I have now.
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10-06-2011, 06:27 PM
#32
sounds good, i didnt know miata engine harness were linked to the chassis harness, i thought they were two separate things... ive yet to actually look at an engine harness thats off a miata. but atleast you'll only have to modify the ends of the harness for the sensors, versus the whole thing itself.
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10-07-2011, 05:40 AM
#33
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Wut?
The NA CAS sends both cam and crank signals too, they're driven off the cam which is why the NB sensors are more accurate, the crank sensor is actually on the crank so isn't effected by timing belt slop.
Whilst it's technically possible to run an engine from a cam signal only, you need slightly more teeth than the NA CAS provides
.
Cliffs:
NA = CAS which sends both crank and cam signals
NB = Separate crank and cam sensors, crank on the.... crank and cam on the cam.
The NA CAS sends both cam and crank signals too, they're driven off the cam which is why the NB sensors are more accurate, the crank sensor is actually on the crank so isn't effected by timing belt slop.
Whilst it's technically possible to run an engine from a cam signal only, you need slightly more teeth than the NA CAS provides
.Cliffs:
NA = CAS which sends both crank and cam signals
NB = Separate crank and cam sensors, crank on the.... crank and cam on the cam.
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12-19-2011, 10:52 PM
#35
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Well it's been awhile since I posted before I actually made any progress. I have some free time over the holiday break so I pulled the car into the garage to pull the 1.6 and mount the MSM engine up.
The wonderful garage...better than working in the driveway I guess.
Squirrels love my engine bay:
Progress after a few hours:
The wonderful garage...better than working in the driveway I guess.
Squirrels love my engine bay:
Progress after a few hours:
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01-07-2012, 10:21 PM
#38
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Not many updates for awhile, I have been working on it slowly. I have the MSM engine mounted now, just need some more parts to get it together.
Right now I have the intake off to remove the VTCS butterflies. I also need to get a 99-00 fuel rail and intercooler setup.
Right now I have the intake off to remove the VTCS butterflies. I also need to get a 99-00 fuel rail and intercooler setup.
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08-28-2012, 10:04 PM
#39
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Looks like I forgot to update this thread. The Miata has been running in rallycross for the whole season so far and doing quite well. As long as I am driving well it is very fast.
Some pictures and video.
Some pictures and video.
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