Turbocharged LO Quad4

Parts Used Description Cost
Garret T3-60 0.48 A/R This came from an 84 Ford Turbocoupe 2.3L Turbo/Automatic. The manual transmission turbo is probably better suited because of a larger turbine A/R. I think it is 0.63. This unit needed a bearing kit installed. $25
Rebuild Kit for T3 Turbo I got mine from ADS (Area Diesel Service, in IL) $50
Custom Exhaust Downpipe Mine was made from things you shouldn't use. ;) $10
Custom Exhaust Manifold I took a LO tubular exhaust manifold and cut it up. I then assembled the elbows in a fashion to make a log style manifold with a riser to the turbo. I took these pieces to a welder and asked for it to be made. He provided only 2 peices of metal. The entire thing is stainless steel. Be sure to add support for the turbo's weight. $85
Intercooler This also came off a 2.3L Ford Turbo. Unknown year and model. $50
Fuel Injectors I got mine from Marren Motorsports. I purchased 55 lb/Hr injectors. These are plenty large. This was my BIG cost. It might cost less to use slightly larger than stock size (which is 32 lb/Hr) and use a rising rate fuel pressure regulator. This would also make idle easier. A Quad4 needs low ohm rated injectors. A V-6 needs high ohm rating. V-6 motors will probably need smaller injectors also. Just use the calculator on Marren's web site. $400
Programmable ECM This was included in the Head, Cam, ECM work, but I'll include it here too. This is the brain of my car. Without it my engine would not survive. I have an Electromotive TEC-II. It is an old unit that I picked up used, but works well. It is a little behind the new units in tuning cell amounts and features, but cost me much less. There are several good companies out there. One other company is Haltech. I probably would have gone with one of theirs, but found my unit for less. $650
LO Quad4 Block This was taken out of a 93 Grand Am. It had 93K miles on it. I am using a LO Quad4 because it has a lower compression ratio. It is 9.5:1. Not much lower, but everything helps. $150
Blow Off Valve I ended up finding a G-Reddy Type-S used from a friend. Other possibilities are 1st generation DSM valves and perhaps 3000GT valves. This valve lets out the boost pressure when you shift so that it doesn't back up and damage the turbo when you shift. I did not have one of these at BFest in Memphis. Because of this, my hoses kept blowing off the motor while drag racing. $65
Charge Pipes I made all of my charge pipes out of old pipe that was laying around in the shop. Many elbows are radiator hoses. Whatever would work is what I used. Very cheap methods, very cheap results, but it works. Free
2-Bar MAP Sensor Purchased new. GM Part # .................... This sensor allows the ECM to read positive boost pressures. $40
EGT Gauge with Warning Light Purchased from Westach Gauges. Not really pretty, but very functional. I had used these gauges before and new that they worked. $160
Boost Gauge Westach again. $55
Gauge Pod Lo-Tek gauge pods. These were made after the group order. $45
Total Cost?   $1785 and counting

I'm sure I have forgotten some things, but that gives a rough idea. Plan on $2500.

Email: Rex

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