paperjam wrote:
so is it really necessary to use the water lines on the turbo?
If it is a T3, IMO, no. I have run and my friend Eric ran a water cooled T3 sans water on a track car with no ill effects. Granted, I have absolutely no idea what would happen on a watercooled garrett if you drove it like most soccer moms in portland drive turbo cars...uphill home really quick and then shut them off with the glorious penzoil that the dealer puts in em, but likely nothing good I'd imagine. I'm willing to trade a little cool-down time and using decent oil for not putting all that super hot water into the cooling system, but my opinions are my opinions.
Mitsus have to use the water.
In simple terms, you need most of the mechanical parts from a K-jet 240TIC, and most of the electrical parts from a 740T and LH2.2 240.
I put LH2.2 on my 80 DL in 24 hours straight with no sleep and have had absolutely no issues and it pins out like a factory 88 240 except for the fuel pump relay and one wire that is cabin switched power on the 4-pin connector that runs across the dash on an LH2.2 240. My car is N/A, but it uses a turbo ECU brainbox and 850T injectors without resistors. I'm using bosch breakerless igntion and a stock updated 240 LH2.2 engine harness. With a simple plug-in wiring extension, I should be able to move the AMM connector when the time comes.
Electrically, going LH2.2 turbo on the fuel side of an 86+ 240 is cake. If you are using EZK, you need to make sure the ignition distrubutor has the last 3 numbers ending in "001." The earlier dist (even with the bosch instead of chrysler) cap has the gap and gate spacing inverted from the later ones and the tone wheel is just plain dimensionally different.
I personally, would just use breakerless ignition with LH2.2, but I think knock sensors as used on volvos, like water cooled turbos, are a waste of time and space. That, and I HATE extricating all that crap from the under-dash of an 80s 740 to make the EZK work and to make a decent harness that actually fits a 240 correctly. Making that, and making it so a a rational person can trouble shoot the harness takes a LOT of time.
For Jordan or anyone with an old 77-82 N/A K-jet 240, here is what I did to mine:
-3-bar fuel rail on EFI manifold with no cold start injector boss from an 88 240 to keep it clean.
-Lines and fittings of my making to go to k-jet fuel filter pump etc from an 81 240T to go to the EFI rail. Oil filter service had everything I needed.
-Firewall panel from an 88 240 sans weight with plugs for A/C and different climate control line than my 80 had originally. This was the sucky one to swap just due to access...if you spent longer than 24 hours on the swap, your back will thank you.
-Throttle cable from any EFI 240.
-007 AMM from any LH2.2 4cyl car...85-88 everything basically and 89 turbos. 006 is the 3" version on the 88+ V6 cars. Don't forget the strut bracket to hold it still so it doesn't shake!
-Air intake hose from an 88 240....can come from any EFI 240.
-Injectors from an 88 240 as well as ECU.
-Ignition switch connector and 4-pin connector across the dash from an 88 240. The red-black is ignition switched +12V and turns on 1/2 of the LH2.2 relay that turns on the ECU and injectors ETC. The fat red/yellow runs from the relay to power the fusebox and pumps. The red wire raises the idle to ~900rpm with the A/C on...also useful for lumpier cams, especially on B21FTs. The K-jet idle speed is 900rpm, as is the K adn H-cam B23Es. 85-86 cars have a gray wire in the 4-pin cabing harness interface connector that I don't know the function of...all I know is 88s don't have it and the car runs fine without it.
-K-jet fuel pump relay to power the pumps....LH relay powers everything but the pumps. Kind of a dirty setup to have 2 relays to fail, but at the same time, I have had zero issues.
-New updated 88 240 harness with all gromets and brackets installed correctly.
-#500 idle motor and bracket and hoses from an 88 240.
-Bracket for the EFI ECU from an 88 240 donor.
-Modified breather hoses to go from valvecover to EFI 240 style flame trap and re-enter the air intake after the AMM (AMMs don't care for oil, heat, or vibration).
- OE Bosch breakerless ignition. A-cam '83 B23E ignition dist with one wire tucked into the stock LH2.2 engine harness from the coil - to the connector under the intake manifold for the RPM signal for the LH-jet.
-3-wire 02 sensor. Optional of course, but nice for fuel econ and cold running.
It makes a nice smooth running fuss free runner that can run well with a A, D, K or H-cam with the right distributor. Granted, it is also considerably faster and more efficient than the B21 lump with K-jet. The rev limitier really sucks is the biggest downside, and ultimately the MAF will be unwelcome on something nastier than my fuss free DD. Fuel econ has been a nice solid 20-31mpg with a ~24-25 average city/highway.