XR4Ti Archived Tech Articles
Post Date: Unknown (1999?) Subject: List: Old IMON List I have said it many times, but we do not need aftermarket ignition systems for the 2.3 Turbo for almost any application. I have, until last year used all stock parts including wires and made sufficient power to go 200 MPH a number of times, 11.53 in the quarter, and 175 in the standing start mile. There may be some parts that might have provided several hp more, but I didn't need it. (sort of) In spite of the claims by the manufacturers, you DON'T need it. I'm not shouting, just emphasizing. Last year I even switched back to a Ford coil after suspecting a problem with the MSD part. It ran better. I know the logic of these people sounds good, but we must not forget, they want to sell us something....They get paid to convince us we want their product. Now, that said, I did switch to MSD 6AL last year. Partly because it came with the DFI system I inherited. It was a proven system and I wanted to change as little as possible. Keep in mind that none of us spins the engine above 7000 RPM. and factory systems have always been pretty good below that speed. This year I will be running the engine to 8500 or higher and suspect that the MSD may be helpful. Don't know for sure until we run. One last thought. Not all that is new is necessarily better than that which precedes it. Just different. Our older technology EEC IV factory turbo cars are more responsive to upgrades to allow higher boost and air flow levels. Save the money and buy one of Nicks charge air coolers. Its the best investment for the money that your gonna get. By the way, I had to buy a spare 6AL unit just to have confidence that I would not be in the middle of the salt with "No Spark" . Winston cup cars carry two ignition boxes, because one fails. ---------- Post Date: Unknown (1999?) Subject: List: Old IMON List Spark Plugs - My Personal Holy Grail When beginning my MERKUR project I went to the Ford engineer responsible for coils and wires and asked for advice on ingition systems. HE SAID..... use production parts. The Ford coil produces more energy than anything aftermarket and is more reliable. (I was considering MSD, and had already purchased some parts.) I followed his advice and have had no difficulty. Plug gap .030" to .035" and change plugs frequently. The key to ignition system working is that engine speed does not exceed 7500RPM I think most street freeks fill that bill. PLUGS ----I have used Autolite from day 1. Never had a problem, and never experimented. I agree new is better. Usually smaller gap is better, particularly at high cylinder pressures and temperatures. Colder is better as long as they do not fowl .......AWSF22 is production Heat ranges hotter to colder Motorcraft AWSF 22, AWSF 12, 901, 701, 501 Autolite #s for the last three are 474, 473, 472.....I used 472 with an Iron head from 90 till 93 and went 186 MPH consistantly...... The only problem that I cannot attest to is life. I gave a set to a good friend with a street SVO Mustang, and he said they went away in 6K miles...... And I dont think he saw a difference in performance. My point really is, the production, new condition ignition system is more than adequate. All the parts I use are real production OEM stuff. No special parts hand built or anything like that.... MY ADVICE - DONT SPEND THE MONEY WHERE YOU DONT HAVE TO.Back to the Tech Articles main page
Published by Chris Anglin.