Originally Posted by TZ_280SEL

I am a Mega Squirt guy. I recently (6 mos ago) converted my 72 280SEL4.5 to Mega Squirt. I did the entire thing. I'm running wasted spark with individual coil packs (I chose to use LS2 coils), a 36-1 wheel on the crank, semi- sequential injection utilizing 19# Bosch injectors, DIY fuel rails from Ross, and a few other tid bits. I used a new throttle position sensor on the existing throttle body and have adapted a auxiliary air valve from an 80's jeep 4.0 liter so I could control cold start and warm up idle.

I did all of this because I was tired of dealing with old components that never seemed to work the same way one day to the next. My car ran fine cold (although, very rich), idled poorly when hot, missed badly when humid or raining etc.. The distributor and other misc D-Jet equipment was original to the car and so it had about 500,000 miles on it.

It cost me $1243.03 to do the full conversion including all the wiring. I used all new automotive connectors and did a cold air intake as well.

I can tell you, it is like driving a totally different car. I have also noticed that my oil used to turn very black in the first 500 or so miles after a change. I changed oil about 1500 miles ago (after the conversion) and the oil looks like new and has not moved off the full mark so I think I used to be dumping a lot of fuel into the cylinders.